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DR® Wood Chipper

We want to help you keep your DR® Wood Chipper running in top form.

Use these resources to help maximize performance and extend the life of your investment. If there is something specific you are looking for, please call or email one of our Specialists during our business hours.

Ordering Parts

The best way to order parts is to use our online parts ordering tool at the link below.

Find parts for all Chippers and Chipper Shredders

Owner's Manuals, Parts Lists & Schematics

If you have any questions or are unsure of your model, please contact one of our experienced Technical Support Specialists via phone or email.

Please Note: Parts Lists and Schematics are located in the back of the Owner's Manual.

Chippers

Chipper 16.5 & 21 FPT Self-Feeding (Oct 2015 - Present) Owner's Manual
Chipper 11.5 FPT Self-Feeding (Oct 2015 - Present) Owner's Manual
Chipper 11.00 Premier Owner's Manual
Parts List & Schematics
Chipper 16.50 Pro Owner's Manual
Parts List & Schematics
Chipper 30.00 Commercial Owner's Manual
Parts List & Schematics
Chipper 3-Point Hitch Self-Feeding (Oct 2015 - Present) Owner's Manual
Chipper 3-Point Hitch Rapid-Feed Owner's Manual
Parts List & Schematics
Chipper 3-Point Hitch Top-Discharge Owner's Manual
Chipper 3-Point Hitch Bottom-Discharge Owner's Manual
Chipper 9 HP Hand-Cart Frame Owner's Manual
Chipper 10 HP Hand-Cart Frame Owner's Manual
Chipper 13.5 FPT Ranger Model Owner's Manual
Chipper 10 HP Towable Model Owner's Manual
Chipper 12 HP Towable Model Owner's Manual
Chipper 13 HP Towable Model Owner's Manual
Chipper 16 HP Towable Model Owner's Manual
Chipper 18 HP Non-Road Towable Model Owner's Manual
Chipper 18 HP Top-Discharge Model Owner's Manual
Chipper 18 HP Bottom-Discharge Model Owner's Manual
Chipper 18 and 19 HP Road-Towable, Top-Discharge Model Owner's Manual
Attachment Chipper Owner's Manual

Chipper Shredders

Chipper/Shredder 9.5 FPT (Oct 2015 - Present) Owner's Manual
Chipper/Shredder 11.5 FPT (Oct 2015 - Present) Owner's Manual
Chipper/Shredder 21.0 FPT (Oct 2015 - Present) Owner's Manual
Chipper/Shredder 8 FPT (Before Oct 2015) Owner's Manual
Chipper/Shredder 11.5 FPT (Before Oct 2015) Owner's Manual
Chipper/Shredder 14.5 FPT (Before Oct 2015) Owner's Manual
Chipper/Shredder 18 HP (Jun 2004 - Present) Owner's Manual
Chipper/Shredder 18 HP (Sep 2000 - May 2004) Owner's Manual
Chipper/Shredder 3-Point Hitch (10/27/2006 - Present) Owner's Manual
Chipper/Shredder 3-Point Hitch (Mar 1999 - 10/26/2006) Owner's Manual

Troubleshooting

Self-feeding models

A guide to solving common problems with your DR® Self-Feeding Chipper.

Most problems are easy to fix. Consult the troubleshooting table for common problems and their solutions.

Shut down the engine, wait for all moving parts to come to a complete stop, wait 5 minutes, disconnect the spark plug wire(s), keeping wire away from the spark plug to prevent accidental starting and disconnect the negative battery cable before performing any maintenance procedure or inspection on the chipper. Read the safety considerations section of your Owner's Manual before performing any repairs or maintenance.

The engine turns over, but does not start

  • Check to see if the fuel shut-off valve is in the ON position.
  • Check to see if the spark plug wires are attached.
  • Check the fuel level in the fuel tank.

(Please refer to the Engine Owner's Manual for engine-specific procedures.)

The engine won't start using electric start

  • Review the "Electric Starting" section in your Owner's Manual.
  • Check to see if the fuel shut-off valve is in the ON position.
  • Check to see if the spark plug wires are attached.
  • Check the wire connections - especially the ground connection, the large black wire coming from the battery, where it connects to the engine.
  • Check the wire connections to the solenoid. Disconnect the black battery ground wire first to avoid sparks. Check to be sure that all of the connections are clean and tight. Reconnect the battery ground wire.
  • Check the ground connection on the solenoid where it is bolted to the frame. Using a wrench or socket, tighten the bolts to ensure a good connection to the frame.
  • The battery may not be charged. Check the voltage yourself or at a service station. If the voltage is low, charge the battery with a 12-volt, 1- to 2-amp trickle charger. If you don't run your machine for at least 45 minutes at a time, the battery may need to be periodically charged. See the Battery Care section in your Owner's Manual.

(Please refer to the Engine Owner's Manual for engine-specific procedures.)

Engine lacks power or is not running smoothly

  • Check the throttle lever travel and adjustment. Make sure throttle lever in the Run position.
  • Check the air filter. If it is dirty, clean or replace it following the procedure in the Engine Owner's Manual.
  • Check spark plug(s). If it is dirty or cracked, change it. If it's oily, leave it out, hold a rag over the plug hole(s) and crank the Engine over a couple of times using the electric starter or pull your recoil cord several times (if equipped) to blow out any oil in the cylinder. Then wipe off the plug(s) and reinsert it.
  • The gas must be fresh and clean. If the gas is old, change it. Use DR® Ethanol Fuel Treatment if you keep gas longer than one month.
  • The engine may not have the right amount of clean oil. If the oil is dirty, change it following the procedure in your Owner's Manual.

(Please refer to the Engine Owner's Manual for engine-specific procedures.)

The engine smokes

  • Check the oil level and adjust as needed.
  • You may be operating the machine on too great an incline. The machine should be level.
  • Check the air filter. If it is dirty, clean or replace it following the procedure in the Engine Owner's Manual.
  • You may be using the wrong oil - too light for the temperature. Refer to your Engine Owner's Manual for detailed information.
  • Clean the engine cooling fins if they're dirty.

Chipping action seems too slow or flywheel stalls

  • The engine speed is too slow causing the belt to slip. Run the engine at full throttle.
  • Check for loose or damaged drive belt; tighten or replace as needed. See your Owner's Manual.
  • Check for a dull or damaged knife; sharpen or replace the knife. See your Owner's Manual.

The belt frays or rolls over the drive pulley

  • The drive pulley groove may be nicked. File off any nicks on the pulley.
  • Check the drive belt for wear and hard spots.
  • The drive belt may be stretched; replace it. See your Owner's Manual.
  • The pulleys may be misaligned. See your Owner's Manual.

Belt burns. Flywheel won't turn

  • Immediately stop the engine, wait 5 minutes and disconnect the spark plug wire.
  • Turn the flywheel with a wooden stick to be sure it turns freely.
  • Check for a loose drive belt. See your Owner's Manual.
  • Remove any built-up debris from the chipper hopper inlet and discharge chute.

The machine has excessive vibration

  • Check for a dull or damaged knife; sharpen or replace the knife. See your Owner's Manual.
  • The knife is not properly seated on the flywheel. Loosen the knife mounting screws, reset the knife and tighten the screws. Also, check the knife to wear plate gap. See your Owner's Manual.

When chipping, the log seems to vibrate excessively and "hammers" my hands

  • Check for a dull or damaged knife; sharpen or replace the knife. See your Owner's Manual.
  • The gap between the knife and wear plate is too great; adjust the gap. See your Owner's Manual.
  • Check engine RPMs; run engine at full throttle when chipping.

Chipper knife is hitting the wear plate

  • The gap between the knife and the wear plate is set incorrectly; adjust the knife to wear plate gap. See your Owner's Manual.

Engine runs but the flywheel doesn't rotate

  • The inner shoes of the clutch are worn. Replace worn or broken clutch parts. See your Owner's Manual.
  • Loose drive belt; adjust the drive belt tension, or replace belt. See your Owner's Manual. Remove any built-up debris from the chipper hopper inlet and discharge chute.

The machine's wheels track left or right while being towed

  • Check tire pressures and be sure not to exceed the maximum safe pressure marked on the tires by the manufacturer. There should be 60 psi in each tire if you have the road towing option.

Three Point Hitch / PTO Models

A guide to solving common problems with your DR® 3-Point Hitch Chipper.

Most problems are easy to fix. Consult the troubleshooting table for common problems and their solutions.

warning Warning:

Disengage the PTO, shut down the tractor engine, remove the key, wait for all moving parts to come to a complete stop and disconnect the PTO shaft from the tractor before performing any maintenance procedure or inspection on the chipper. Read the safety considerations section of your Owner's Manual before performing any repairs or maintenance.

Flywheel won't turn

  • The flywheel may be jammed. Immediately disengage the PTO and stop the tractor engine. Remove any built-up debris from the chipper hopper inlet and discharge chute.
  • Check the drive pulley alignment and adjust if necessary.
  • Replace the drive belt or reinstall if the Belt has come off the pulleys.
  • Turn the flywheel with a wooden stick to be sure it turns freely.

The belt frays or rolls over the drive pulley

  • The rotor drive pulley groove may be nicked. File off any nicks on the Pulley.
  • Check the drive belt for wear and hard spots.
  • The drive belt may be stretched; replace it. See your Owner's Manual.
  • The pulleys may be misaligned. See your Owner's Manual.

Chipping action seems too slow or flywheel stalls

  • The PTO speed is too slow causing the belt to slip. Run the PTO at 540 RPM.
  • Check for loose or damaged drive belt; tighten or replace as needed. See your Owner's Manual.
  • Check for a dull or damaged knife; sharpen or replace the knife. See your Owner's Manual.

Belt burns. Flywheel won't turn

  • Immediately disengage the PTO and shut off the tractor.
  • Turn the flywheel with a wooden stick to be sure it turns freely.
  • Check for a loose drive belt. See your Owner's Manual.
  • Remove any built-up debris from the chipper hopper inlet and discharge chute.

The machine has excessive vibration

  • The knife is dull; sharpen or replace it. See your Owner's Manual.
  • The knife is not properly seated on the flywheel. Loosen the knife mounting screws, reset the knife and tighten the screws. Also, check the knife to wear plate gap. See your Owner's Manual.

When chipping, the log seems to vibrate excessively and "hammers" my hands

  • Check for a dull or damaged knife; sharpen or replace the knife. See your Owner's Manual.
  • The gap between the knife and wear plate is too great; adjust the gap. See your Owner's Manual.
  • Check PTO RPMs; run PTO at 540 RPM when chipping.

Chipper knife is hitting the wear plate

  • The gap between the knife and the wear plate is set incorrectly; adjust the knife to wear plate Gap. See your Owner's Manual.

PTO turns but the flywheel doesn't rotate

  • Loose drive belt; replace belt. See your Owner's Manual.
  • Remove any built-up debris from the chipper hopper inlet and discharge chute.

Frequently Asked Questions

Q: Among the available models, what are the differences among the DR® Wood Chippers?

A: Because they use the power of your tractor (up to 65 HP), the PTO models potentially offer the maximum power and speed. But if you need a stand-alone machine with its own engine, the 21.0 Self-Feeding model will devour just about anything up to 5-3/4" in diameter.

Q: How are DR® products shipped?

A: We offer 3 basic options:

  1. Delivery to a Depot
  2. Delivery to Home or Business
  3. Enhanced Home Delivery

Q: How often do the chipper knives require sharpening?

A: Because our knives are made of high-carbon/high-chromium forged alloy tool steel, they can go significantly longer than the knives on most "bargain" chippers without sharpening. Still, as with any cutting tool, keeping a sharp edge is important for maintaining peak performance. How long you can go without sharpening will vary considerably with the amount of chipping you do and the type of material you are chipping. When the chipper starts to slow down and requires that you regularly force the material downward, it's usually a sign that the knife is dulling. Many customers choose to get an extra knife to have on hand. That way, you can keep working with minimal downtime.

Q: What happens if my machine needs service?

A: Our knowledgeable representatives have an extensive understanding of the DR® Chipper and Chipper/Shredder and will be able to identify the problem and the best solution. If necessary, we can have replacement parts shipped to you right away, or direct you to one of our authorized DR® Service Centers nationwide.

Q: How does your 6 Month Hands-On Trial work?

A: We are so confident you'll love your DR® machine that we want you to be able to try it out on your own property virtually risk-free. If at any time during the first 6 months of owning your DR® (6 months from the date it ships) you decide that it isn't right for you, or wish to exchange it for a different model, we will take it back, no questions asked, for a full refund, less shipping to and from your delivery location. See more information here.

Q: How does my warranty work?

A: DR® machines come with a 2-year warranty (for residential use, 90 days for commercial use) that covers all defects in materials and workmanship. Extended warranties (1-year, 2-year, and 3-year) are available to extend your coverage for a total of up to 5 years. If, while your machine is under warranty, you experience a problem with your machine, your warranty will cover the replacement and installation of any non-wearable parts deemed to be the result of defective materials or workmanship. See more information here.

Tips & Tricks

The following information is provided to demonstrate proper techniques when operating your DR® Wood Chipper.

Note: This information pertains to the most recent DR® Wood Chipper models. Please refer to your Safety & Owner's Manual for instructions specific to your machine. Please refer to the Engine Owner's Manual for engine specific instructions.
warning Warning:

Always wear protective goggles or safety glasses with side shields while chipping to protect your eyes from possible thrown debris.

Avoid wearing loose clothing or jewelry, which might catch on moving parts or the material fed into the chipper hopper.

We recommend wearing gloves while chipping. Be sure your gloves fit properly and do not have loose cuffs or drawstrings.

Wear shoes with non-slip treads when using your chipper. If you have safety shoes, we recommend wearing them. Do not use the machine while barefoot or wearing open sandals.

Wear long pants while operating the DR® Wood Chipper.

Use ear protectors or ear plugs rated for at least 20 dBA to protect your hearing.

Processing Material

  • The chipper is designed to accept wood only. The chipper knife mounted on a revolving flywheel turns branches fed into the chipper hopper into "chips". The chipper can chip branches ranging in size up to 5-3/4" in diameter. Cut your materials into manageable lengths before feeding them into the chipper hopper.
    warning Warning:

    The chipper hopper must be securely bolted to your DR® Wood Chipper and the blowback shield in place before using the machine!

    Use common sense when using the machine. Learn to recognize the change in sounds when overloaded. Turn off the engine immediately if the machine becomes jammed to prevent damage to the drive system.

  • Your DR® Wood Chipper can process dry or green wood up to 5-3/4" in diameter.
  • The chipper will self-feed the wood once it contacts the knife edge so forcing the branches into the hopper is not necessary if the knife is sharp.
  • Green material will process quicker and easier than dry material.
  • Softwood processes easier than hardwood.
  • When chipping branches, sometimes a tail will develop at the end of a branch. To avoid this, rotate the branch while feeding it into the chipper hopper.
  • Rotating the branch as you feed it into the machine will improve chipping performance.
  • Use caution with small diameter green saplings and branches less than 2" in diameter. Chip these grouped or bundled together to provide support for each other. If the material is 2" or larger, feed only one at a time into the chipper hopper.
  • Make sure the DR® Wood Chipper finishes processing material in the Hopper before shutting the engine off.
  • Do not force material into the chipper. If the machine does not chip well, the knife may need sharpening or replacement, or the gap between the knife and the wear plate needs adjusting. See "Removing, Replacing and Adjusting the Chipper Knife and Wear Plate" in your Owner's Manual.

    Never throw remaining stubs or knots into the chipper hopper; damage will result.

  • Extremely hard knots will not process very well. Push any short stubs that have not self-fed through the chipper, with the next branch to be chipped.
  • Cut the material to be chipped into manageable lengths of no more than five or six feet long before chipping them. As the branch or tree is fed into the chipper hopper, keep it at the same angle as the hopper for optimal chipping performance
  • Overloading the chipper hopper will cause the rotor speed to decrease. If you hear the engine RPM decreasing, stop feeding material into the chipper hopper until the engine has returned to full speed.
  • Always wear gloves when chipping. This can prevent blisters and scrapes and help reduce the effects of vibration as you chip. Properly fitting leather or lined gloves work best.
  • Run the engine at full throttle when chipping. If the chipping action seems too slow, the engine speed may be too slow causing the belt to slip.
  • Feed branches with green leaves and conifer/pine boughs slowly and shut off the engine immediately if the chipper begins to clog.
  • When feeding material into the chipper hopper, be careful that pieces of metal, rock or other foreign objects are not included.
  • If the cutting mechanism strikes a foreign object or if the machine should start making an unusual noise or vibration, immediately shut off the engine, wait for all moving parts to come to a complete stop (the flywheel will continue rotating for while after the engine is shut down), disconnect the spark plug wire, keeping the wire away from the spark plug to prevent accidental starting, then wait 5 minutes before inspecting for clogging or damage. Vibration is generally a warning of trouble. Clean and repair and/or replace damaged parts. See your Owner's Manual for detailed instructions.
  • If the machine becomes clogged, the belt smokes or burns or the flywheel won't turn, immediately shut down the engine, wait for all moving parts to come to a complete stop (the flywheel will continue rotating for while after the engine is shut down), disconnect the spark plug wire, keeping the wire away from the spark plug to prevent accidental starting, disconnect the negative battery cable, then wait 5 minutes before removing processed material, leaves, or debris from the machine. See your Owner's Manual for detailed instructions.

Three-Point Hitch Models

warning Warning:

Disengage the PTO, shut down the tractor engine, remove the key, wait for all moving parts to come to a complete stop, disconnect the PTO shaft from the tractor, then wait 5 minutes before performing any maintenance procedure or inspection on the chipper. Read the safety considerations section of your Owner's Manual before performing any repairs or maintenance.

  • The DR® Three-Point Hitch Chipper is designed to be run with the weight of the unit on level ground. Chipping with the unit off the ground or on uneven ground can result in injury to the operator or others, or unsatisfactory chipping performance.
  • To activate the chipper, engage the PTO drive with the tractor running at idle. Gradually increase tractor engine speed until you achieve a PTO speed of 540 RPM. PTO speeds less than 540 RPM will result in poor chipping performance. Chipping with greater than 540 RPM can damage the equipment.
  • Whenever you leave the operating position or if you have to remove processed material, leaves, or debris from the machine, always disengage the PTO, shut down the tractor, remove the key, wait for all moving parts to come to a complete stop, disconnect the PTO shaft from the tractor, then wait 5 minutes before removing processed material, leaves, or debris from the machine.
  • Disengage the PTO drive when leaving the operating position or moving the chipper.

Safety Information

Important safety information regarding your DR® Wood Chipper

Read the Safety and Operating Manual before you use the DR® Wood Chipper. Become familiar with the operation and service recommendations to ensure the best performance from your chipper. (Our most recent manuals are available as a PDF download.)

Thoroughly inspect the area in which you will be working and remove all foreign objects. Look for rope, wire, etc., and remove these objects before chipping. Inserting these objects into the chipper hopper could damage the machine and/or cause injury. This is a high-powered machine, with moving parts operating at high energy at high speeds. You must use proper clothing and safety gear when operating this machine to prevent or minimize the risk of severe injury. This machine can crush, grind, cut, and sever parts of your body if they enter the inlet or discharge area of your chipper.

Safety Rules

Labels

  • Your DR® Wood Chipper carries prominent labels as reminders for its proper and safe use. Your Owner's Manual shows copies of all the labels that appear on the equipment. Take a moment to study them and make a note of their location on your DR® Wood Chipper as you assemble and before you operate the machine. Replace damaged or missing safety and information labels immediately.

Protecting yourself and others around you

This is a high-powered machine, with moving parts operating at high energy at high speeds. You must use proper clothing and safety gear when operating this machine to prevent or minimize the risk of severe injury. This machine can cut and sever parts of your body if they become in contact with the moving chipper blades. Always take the following precautions when operating this machine:

  • Always wear protective goggles or safety glasses with side shields while chipping, or performing an adjustment on your DR® Wood Chipper to protect your eyes from possible debris thrown from the machine.
  • Wear shoes with non-slip treads when using your DR® Wood Chipper. If you have safety shoes, we recommend wearing them. Do not use the machine while barefoot or wearing open sandals.
  • Avoid wearing loose clothing or jewelry, which can catch on the machine's moving parts or material fed into the chipper hopper.
  • We recommend wearing long pants and gloves while using your DR® Wood Chipper. Be sure your gloves fit properly and do not have loose cuffs or drawstrings.
  • We recommend the use of ear protectors or ear plugs rated for at least 20 dBA to protect your hearing.
  • Allow only responsible individuals who are familiar with these general safety rules and operating instructions to use your DR® Wood Chipper. Never allow people who are unfamiliar with these instructions to use the machine.
  • Never place your hands, feet, or any part of your body in the chipper hopper, discharge opening, or near or under any moving part while the machine is running. Keep area of discharge clear of people, animals, buildings, glass or anything else that will obstruct clear discharge, cause injury, or damage. Wind can also change discharge direction, so be aware. If it becomes necessary to push material into the chipper hopper, use a small diameter stick, not your hands.
  • Keep bystanders at least 100 feet away from your work area at all times. Wood chips exit the chipper at great speeds. To be safe, do not operate the machine near small children or pets, and never allow children to operate the chipper. Disengage the PTO (if applicable), stop the engine (and tractor engine, if applicable) when another person or pet approaches.
  • The flywheel will still rotate for a while after the engine is shut off. Shut down the engine, wait for all moving parts to come to a complete stop, wait 5 minutes, then remove the spark plug wire before moving or working on the chipper.
  • Never use the machine without ensuring that all guards and shields are in place, including the chipper hopper, discharge chute and blowback shield. Do not alter or tamper with safety devices or shields.
  • Do not operate the engine with the air cleaner or the carburetor air-intake cover removed. Removal of such parts could create a fire hazard. Do not use flammable solutions to clean the air filter.
  • Always operate the machine from the operator zone (see "Operation Notes" in your Owner's Manual). Never pass or stand on the discharge side of the machine when the engine (or tractor engine, if applicable) is running or the flywheel is turning.
  • Never try to pick up, move, or transport the machine with the PTO engaged (if applicable) or while the engine is running or the flywheel is turning. Shut down the engine, wait for all moving parts to come to a complete stop (the flywheel will continue rotating for a while after the engine is shut down), disconnect spark plug wire, keeping it away from the spark plug to prevent accidental starting, then wait 5 minutes before moving.
  • Do not touch the exhaust area, including the muffler and engine when the machine is in use as they become very hot and can cause a severe burn. Allow the engine to cool before doing maintenance or making adjustments.
  • Clear the area of object such as wire and rope, etc. Inserting these objects into the chipper hopper could damage the flywheel and/or cause injury
  • Never, under any conditions, remove, bend, cut, fit, weld, or otherwise alter standard parts on the DR® Wood Chipper. This includes all shields and guards. Modifications to your machine could cause personal injuries and property damage and will void your warranty.

Safety for children and pets

Tragic accidents can occur if the operator is not alert to the presence of children or pets. Children are often attracted to the tractor and the chipping activity. Never assume that children will remain where you last saw them. Always follow these precautions:

  • Keep children and pets at least 100 feet from the working area and ensure they are under the watchful care of a responsible adult.
  • Be alert and always turn the machine off if children or pets enter the work area.
  • Never allow children to operate the DR® Wood Chipper.

Safety with gasoline-powered machines (for self-feeding models)

Gasoline is a highly flammable liquid. Gasoline also gives off flammable vapor that can be easily ignited and cause a fire or explosion. Never overlook the hazards of gasoline. Always follow these precautions:

  • Never run the engine in an enclosed area or without proper ventilation as the exhaust from the engine contains carbon monoxide, which is an odorless, tasteless, and deadly poisonous gas.
  • Store all fuel and oil in containers specifically designed and approved for this purpose and keep away from heat and open flame, and out of the reach of children.
  • Always check fuel lines and fittings frequently for cracks or leaks. Replace when worn or damaged and after 5 years of use.
  • Fill the gasoline tank outdoors with the engine off and allow the engine to cool completely. Do not handle gasoline if you or anyone nearby is smoking, or if you're near anything that could cause it to ignite or explode. Replace the fuel tank and fuel container caps securely.
  • If you spill gasoline, do not attempt to start the engine. Move the machine away from the area of the spill and avoid creating any source of ignition until the gas vapors have dissipated. Wipe up any spilled fuel to prevent a fire hazard and properly dispose of the waste.
  • Allow the engine to cool completely before storing the DR® Wood Chipper in any enclosure. Never store the machine with gas in the tank or a fuel container, near an open flame or spark such as a water heater, space heater, clothes dryer or furnace.
  • Never make adjustments or repairs with the engine running or the flywheel turning. Shut down the engine, wait for all moving parts to come to a complete stop (the flywheel will continue rotating for while after the engine is shut down), disconnect the spark plug wire, keeping it wire away from the spark plug to prevent accidental starting, then wait 5 minutes before making adjustments or repairs.
  • Never check for an ignition spark with the spark plug or spark plug wire removed. Always use an approved spark plug tester.
  • Never tamper with the engine's governor setting or modify the engine speed. The governor controls the maximum safe operating speed and protects the engine. Over-speeding the engine is dangerous and will cause damage to the engine and to the other moving parts of the machine. If required, see your authorized engine dealer for engine governor adjustments.

Towing Safety (for self-feeding models installed with optional road-towing package)

Always take the following precautions:

  • Before towing, be certain the DR® Wood Chipper is correctly and securely attached to the towing vehicle and the safety chains are in place. Leave slack in the chains to allow for turning.
  • Never allow people or pets to ride on the DR® Wood Chipper.
  • Never transport anything on the machine.
  • Obey local, state, and federal regulations when you tow the chipper on public roads and highways.
    Note: Some states require the machine to be registered with the State Department of Motor Vehicles.
  • Allow for added length in driving situations, e.g., when turning, parking, and crossing intersections.
  • Adjust your towing speed for terrain and conditions. Do not exceed 45 MPH while towing the chipper.
  • Towing the machine can affect the handling of the tow vehicle:
    • The chipper might track at an angle to the tow vehicle.
    • The machine can turn tighter than the tow vehicle.
    • Never back up the tow vehicle with the chipper attached. The machine can jackknife, causing damage to itself and/or the tow vehicle.
  • Long distance towing is not recommended. The DR® Wood Chipper does not have springs to absorb road shock and will tend to bounce on rough roads. Extended towing can cause unnecessary wear.

General safety

The DR® Wood Chipper must be operated safely to prevent or minimize the risk of death or serious injury. Unsafe operation can create a number of hazards for you. Always take the following precautions when operating this machine:
  • For PTO Models: This machine is designed to operate at 540 RPM only! Never operate the machine at a faster speed; doing so can cause serious injury to the operator or bystanders and could cause damage to the machine that is not covered under warranty.
  • For PTO Models: The DR® Three-Point Hitch Chipper must be operated with the weight of the machine on the ground. Operating the machine while it is off the ground can result in injury to yourself or others, or can cause damage to the machine which is not covered under warranty.
  • Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people, their property, and themselves.
  • Your DR® Wood Chipper is a powerful tool, not a plaything. Exercise extreme caution at all times. The design of this machine is to chip wood. Do not use it for any other purpose.
  • Know how to stop the chipper quickly (by disengaging the PTO and shutting down the tractor, if applicable); see your Owner's Manual.
  • Operate this machine on a level surface only. Never operate your unit on a slippery, wet, muddy, or icy surface. Exercise caution to avoid slipping or falling.
  • Keep your face and body back from the chipper hopper to avoid accidental bounce back of any material.
  • When feeding material into the chipper hopper, be extremely careful that pieces of metal, rocks, or other foreign objects are not included. Personal injury or damage to the machine could result.
  • Never allow an accumulation of processed material to build up in the discharge area as this will prevent proper discharge and can result in kickback from the chipper hopper.
  • For Self-Feeding Models: Whenever you leave the operating position or if you have to remove processed material, leaves, or debris from the machine. Always shut down the engine, wait for all moving parts to come to a complete stop (the flywheel will continue rotating for while after the engine is shut down), disconnect the spark plug wire, keeping the wire away from the spark plug to prevent accidental starting, disconnect the negative battery cable, then wait 5 minutes before removing processed material, leaves, or debris from the machine.
  • For Three-Point Hitch Models: Whenever you leave the operating position or if you have to remove processed material, leaves, or debris from the machine. Always disengage the PTO, shut down the tractor, remove the key, wait for all moving parts to come to a complete stop, disconnect the PTO shaft from the tractor, then wait 5 minutes before removing processed material, leaves, or debris from the machine.
  • Always stop the engine when moving the DR® Wood Chipper.
  • Never leave the DR® Wood Chipper unattended with the engine running.
  • Keep your hands and combustible substances away from the engine when it is hot and clean the engine area after each use.
  • Never cover the machine while the muffler is still hot.
  • For Self-Feeding Models: If the cutting mechanism strikes a foreign object or if the machine should start making an unusual noise or vibration, immediately shut off the engine, wait for all moving parts to come to a complete stop (the flywheel will continue rotating for while after the engine is shut down), disconnect the spark plug wire, keeping the wire away from the spark plug to prevent accidental starting, then wait 5 minutes before inspecting for clogging or damage. Vibration is generally a warning of trouble. Clean and repair and/or replace damaged parts.
  • For Three-Point Hitch Models: If the cutting mechanism strikes a foreign object or if the machine should start making an unusual noise or vibration, immediately disengage the PTO, shut down the tractor, remove the key, wait for all moving parts to come to a complete stop, disconnect the PTO shaft from the tractor, wait for all moving parts to come to a complete stop, then wait 5 minutes before inspecting for clogging or damage. Vibration is generally a warning of trouble. Clean and repair and/or replace damaged parts.
  • Never tamper with safety devices. Regularly check their proper operation.
  • Stay alert for hidden hazards or traffic. Never carry passengers on your machine.
  • Never overload or attempt to chip material beyond the manufacturer's recommendation; see your Owner's Manual. Personal injury or damage to the machine could result.
  • While using the chipper, do not hurry or take things for granted. When in doubt about the equipment or your surroundings, stop the machine and take the time to look things over.
  • Never operate the machine when under the influence of alcohol, drugs, or medication.
  • Use the DR® Wood Chipper only in daylight.
  • Keep all nuts and bolts tight and keep the equipment in a good safe operating condition.
  • For Three-Point Hitch Models: Your DR® Three-Point Hitch Chipper is driven by a PTO shaft that transfers power from your tractor. A PTO shaft is extremely dangerous and can cause serious injury or death. Read and understand all of the safety and operating instructions manual that came with your PTO shaft.
  • See manufacturer's instructions for proper operation and installation of accessories. Only use accessories approved by DR® Power Equipment, Inc.
  • No list of warnings and cautions can be all-inclusive. If situations occur that are not covered by this manual, the operator must apply common sense and operate the DR® Three-Point Hitch Chipper in a safe manner.

Transportation safety (for three-point hitch models)

Always take the following precautions:
  • Before transporting, be certain the DR® Three-Point Hitch Chipper is correctly and securely attached to your tractor and the safety chains of the PTO are in place.
  • Make sure the DR® Three-Point Hitch Chipper is raised high enough to clear all obstacles during transportation.
  • Never transport the machine for long distances.
  • Never allow people or pets to ride on the DR® Three-Point Hitch Chipper.
  • Never transport anything on the machine.
  • Never transport the DR® Three-Point Hitch Chipper with the PTO engaged.
  • Obey local, state, and federal regulations when you tow the chipper on public roads and highways.

    Note: Some states require the machine to be registered with the State Department of Motor Vehicles.

  • Allow for added length in driving situations, e.g., when turning, parking, and crossing intersections.
  • Adjust your towing speed for terrain and conditions.
  • Use caution when backing or turning. Be aware of the large turning radius required with the DR® Three-Point Hitch Chipper attached to your tractor.

A note to all users

Under California law, and the laws of some other states, you are not permitted to operate an internal combustion engine using hydrocarbon fuels without an engine spark arrestor. This also applies to operation on US Forest Lands. We provide all DR® Self-Feeding Chippers shipped to California and Washington State with spark arrestors. Failure of the owner/operator to maintain this equipment in compliance with state regulations is a misdemeanor under California law and may be in violation of other state and/or federal regulations. Contact your local fire marshal or forest service for specific information in your area.

Additional information and potential changes

DR® Power Equipment, Inc. reserves the right to discontinue, change, and improve its products at any time without alert alert-info or obligation to the purchaser. The descriptions and specifications contained in this manual were in effect at printing. Equipment described within this manual may be optional. Some illustrations may not be applicable to your machine.

Maintenance

Self-Feeding Models

Regular maintenance is the way to ensure the best performance and long life of your DR® Self-Feeding Chipper.

For engine maintenance, please refer to the Engine Owner's Manual that came with your machine. Service intervals listed in the checklist below supersede those listed in the Engine Owner's Manual.

warning Warning:

Shut down the engine, wait for all moving parts to come to a complete stop, wait 5 minutes, remove spark plug wires and disconnect the negative battery cable before performing maintenance on the chipper.

Regular Maintenance Checklist

Procedure - All Models Before Each Use Every 8-10 hours Every 18-20 hours Every 40 hours
Check engine oil level check      
Check general equipment condition check      
Check that flywheel turns freely (with a long stick only) check      
Visually inspect knife for damage check      
Check knife and wear plate for sharpness   check    
Check knife and wear plate attachment screws   check    
Check flywheel bearing collar set screws   check    
Check knife to wear plate gap   check    
Lubricate flywheel bearings   check    
Check belt tension and condition 1st time: 1 hour check    
Clean engine exterior and cooling fans   check    
Check the tire pressure       check
Check the battery voltage
(electric start only)
  check    
Change engine oil
(and filter, if equipped)
1st time: 5 hours     check
Inspect or replace drive belt       check
Inspect or replace spark plug       check
Inspect or replace air filter and pre-cleaner       check

Note: Consider that service intervals shown are the maximum under normal operating conditions. Increase frequencies under extremely dirty or dusty conditions.


Three Point Hitch / PTO Models

Regular maintenance is the way to ensure the best performance and long life of your DR® 3-Point Hitch Chipper.

warning Warning:

Disengage PTO, shut down the tractor engine, remove the key, wait for all moving parts to come to a complete stop and disconnect the PTO shaft from the tractor before performing any maintenance procedure or inspection on the Chipper.

Regular Maintenance Checklist

Procedure Before Each Use Every 8-10 hours Every 18-20 hours Every 40 hours
Check general equipment condition check      
Check that flywheel turns freely (with a long stick only) check      
Visually inspect knife for damage check      
Check knife and wear plate for sharpness   check    
Check knife and wear plate attachment screws   check    
Check flywheel bearing collar set screws   check    
Check knife to wear plate gap   check    
Lubricate flywheel bearings   check    
Lubricate PTO shaft grease fittings   check    
Lubricate PTO sheave bearings   check    
Check belt tension and condition 1st time: 1 hour check    
Lubricate PTO shaft spline ends
and center overlap
    check  
Inspect or replace drive belt       check

End of Season and Storage

Self-Feeding Models

The following information is provided to demonstrate proper techniques when storing your DR® Self-Feeding Chipper.

Note: Please refer to the Engine Owner's Manual for engine-specific procedures.

warning Warning:

Shut down the engine, wait for all moving parts to come to a complete stop, wait 5 minutes and remove spark plug wire before performing any maintenance procedure or inspection on the chipper

Never store the DR® Self-Feeding Chipper with fuel in the fuel tank inside a building where ignition sources are present, such as hot water and space heaters, clothes dryers and the like. If you are going to drain the fuel tank, do this outdoors. Allow the engine to cool before storing in any enclosure.

When not in use, your DR® Self-Feeding Chipper should be stored out of the reach of children.

Read the safety considerations section of your Owner's Manual before performing any repairs or maintenance.

End-of-Season Procedure

  • Change the oil (and oil filter, if applicable).
  • If your DR® Self-Feeding Chipper will be idle for more than 30 days, we recommend using DR® Ethanol Fuel Treatment. This will prevent sediment from gumming up the carburetor. If there is dirt or moisture in the gas or tank, remove it by draining the tank. Completely fill the tank with fresh, unleaded gas and add the appropriate amount of fuel treatment. Run the engine for a short time to allow the additive to circulate. Close the fuel shut-off valve to prevent carburetor overflow and leakage.
  • Remove the spark plug and pour about 1 ounce of motor oil into the cylinder hole. Reinstall the plug and pull the starter cord a few times. This will coat the pistons and seat the valves to prevent moisture buildup.
  • Clean or replace the air filter.
  • Lubricate all grease fittings.
  • Clean any dirt and debris from the cylinder head cooling fins, blower housing, debris screen and muffler area of the engine.
  • If your engine has a fuel filter, replace it.
  • Check the drive belt for wear.
  • Check the chipper knife and wear plate for nicks and wear.
  • For electric start models remove the battery or store your DR® Self-Feeding Chipper in a dry environment where the temperature is between -10? F (-23? C) and +85? F (+23? C). Make sure the storage temperatures will never be outside these limits.
  • Clean any debris from the hopper and discharge chute.

Three-Point Hitch / PTO Models

The following information is provided to demonstrate proper techniques when storing your DR® 3-Point Hitch Chipper.

Note: Please refer to the Safety and Operation Manual that came with the PTO shaft for specific PTO shaft procedures.
warning Warning:

Disengage PTO, shut down the tractor engine, remove the key, wait for all moving parts to come to a complete stop and disconnect the PTO shaft from the tractor before performing any maintenance procedure or inspection on the chipper.

When not in use, your DR® 3-Point Hitch Chipper should be stored out of the reach of children.

Read the safety considerations section of your Owner's Manual before performing any repairs or maintenance.

End-of-Season Procedure

  • Lubricate PTO shaft grease fittings.
  • Lubricate two flywheel bearings.
  • Lubricate two PTO sheave bearings.
  • Check the drive belt for wear, replace as needed.
  • Release drive belt from tensioner to relieve belt stress.
  • Check the chipper knife and wear plate for nicks and wear. Sharpen or replace as needed.
  • Check the general condition of the machine, e.g. nuts, bolts welds, etc. Replace parts or tighten hardware as needed.
  • Clean any debris from the hopper and discharge chute.
  • Store in a dry covered area to protect from moisture.

Warranty

DR® Wood Chipper 2-Year Limited Warranty - Terms and Conditions

Unless otherwise stated in the materials that arrive with your product, DR® Wood Chippers are warranted for two (2) years against defects in materials or workmanship when put to ordinary and normal consumer use; ninety (90) days for any other use.

For the purposes of all the above warranties, "ordinary and normal consumer use" refers to non-commercial residential use and does not include misuse, accidents or damage due to inadequate maintenance.

DR® Power Equipment certifies that your DR® Wood Chipper is fit for ordinary purposes for which products of its type are used. DR® Power Equipment however, limits the implied warranties of merchantability and fitness in duration to a period of two (2) years in consumer use, ninety (90) days for any other use.

The 2-Year Limited Warranty on a DR® Wood Chipper starts on the date the machine ships from our factory. The 2-Year Limited Warranty is applicable only to the original owner.

The warranty holder is responsible for the performance of the required maintenance as defined by the manufacturer's owner's manuals. The warranty holder is responsible for replacement of normally wearing parts such as belts, batteries, air filters, oil filters, knives, wear plates, highway tires or spark plugs. Accessories to the machine are not covered by this warranty.

During the warranty period, the warranty holder is responsible for the machine transportation charges, if required. During the warranty period, warranty parts will be shipped by standard method at no charge to the warranty holder. Expedited shipping of warranty parts is the responsibility of the warranty holder.

SOME STATES DO NOT ALLOW LIMITATIONS ON THE LENGTH OF IMPLIED WARRANTIES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.

DR® Power Equipment shall not be liable under any circumstances for any incidental or consequential damages or expenses of any kind, including, but not limited to, cost of equipment rentals, loss of profit, or cost of hiring services to perform tasks normally performed by your DR® Wood Chipper.

SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU ALSO HAVE OTHER RIGHTS, WHICH VARY FROM STATE TO STATE.

DR® Chipper/Shredder 2-Year Limited Warranty - Terms and Conditions

Unless otherwise stated in the materials that arrive with your product, DR® Chipper/Shredders are warranted for two (2) years against defects in materials or workmanship when put to ordinary and normal consumer use; ninety (90) days for any other use.

For the purposes of all the above warranties, "ordinary and normal consumer use" refers to non-commercial residential use and does not include misuse, accidents or damage due to inadequate maintenance.

DR® Power Equipment certifies that your DR® Chipper/Shredder is fit for ordinary purposes for which products of its type are used. DR® Power Equipment however, limits the implied warranties of merchantability and fitness in duration to a period of two (2) years in consumer use, ninety (90) days for any other use.

The 2-Year Limited Warranty on a DR® Chipper/Shredder starts on the date the machine ships from our factory. The 2-Year Limited Warranty is applicable only to the original owner.

The warranty holder is responsible for the performance of the required maintenance as defined by the manufacturer's owner's manuals. The warranty holder is responsible for replacement of normally wearing parts such as drive belts, air filters, spark plugs, clutches, chipper knives, wear plates, shredder hammers and wheels. Accessories to the machine are not covered by this warranty.

During the warranty period, the warranty holder is responsible for the machine transportation charges, if required. During the warranty period, warranty parts will be shipped by standard method at no charge to the warranty holder. Expedited shipping of warranty parts is the responsibility of the warranty holder.

SOME STATES DO NOT ALLOW LIMITATIONS ON THE LENGTH OF IMPLIED WARRANTIES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.

DR® Power Equipment shall not be liable under any circumstances for any incidental or consequential damages or expenses of any kind, including, but not limited to, cost of equipment rentals, loss of profit, or cost of hiring services to perform tasks normally performed by your DR® Chipper/Shredder.

SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU ALSO HAVE OTHER RIGHTS, WHICH VARY FROM STATE TO STATE.