DR 372111 Quick start guide

Read and understand this manual and all instructions before operating or servicing this 3-Point Hitch DR SELF-FEEDING Chipper.
DR3-POINT HITCH SELF-FEEDING CHIPPER
SAFETY & OPERATING INSTRUCTIONS
Serial No.
Order No.
DR Power Equipment
Toll-free phone: 1-800-DR-OWNER (376-9637)
Fax: [phone]
Website: www.DRpower.com
Original Language

23-POINT HITCH DR®SELF-FEEDING™ CHIPPER
This indicates a hazardous situation, which, if not avoided, could result in minor or moderate injury.
This information is important in the proper use of your machine. Failure to follow this instruction could result in damage to your
machine or property.
Table of Contents
Chapter 1: General Safety Rules....................................................................................................................... 3
Chapter 2: Setting Up Your 3-POINT HITCH DR SELF-FEEDING CHIPPER................................................ 8
Chapter 3: Operating Your 3-POINT HITCH DR SELF-FEEDING CHIPPER............................................... 16
Chapter 4: Maintaining Your 3-POINT HITCH DR SELF-FEEDING CHIPPER............................................ 20
Chapter 5: Troubleshooting ........................................................................................................................... 29
Chapter 6: Chipper Accessories..................................................................................................................... 31
Chapter 7: Parts List And Schematic Diagrams ............................................................................................ 34
Conventions used in this manual
Serial Number and Order Number
A Serial Number is used to identify your machine and is located on the Serial Number Label on your machine. An Order Number
is used to check and maintain your order history and is located on the upper left portion of your packing slip. For your
convenience and ready reference, enter the Serial Number and Order Number in the space provided on the front cover of this
manual.
Additional Information and Potential Changes
DR Power Equipment reserves the right to discontinue, change, and improve its products at any time without notice 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.
This indicates a hazardous situation, which, if not followed, will result in death or serious injury.
This indicates a hazardous situation, which, if not avoided, could resul
t
in death or serious in
j
ur
y
.

CONTACT US AT www.DRpower.com 3
Chapter 1: General Safety Rules
Labels
Your 3-Point Hitch DR SELF-FEEDING Chipper carries prominent labels as reminders for its proper and safe use. Shown below
are copies of all the safety and operation labels that appear on the equipment. Take a moment to study them and make a note of
their location on your 3-Point Hitch DR SELF-FEEDING Chipper as you assemble and before you operate the unit. Replace
damaged or missing safety and operation labels immediately.
Read this Safety & Operating Manual before you use the 3-Point Hitch DR SELF-FEEDING Chipper. Become familiar with the
operation and service recommendations to ensure the best performance from your machine.
Thoroughly inspect the area in which you will be working and remove all foreign objects. Look for Rope, Wire, ECT., 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 with 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 it they enter the inlet or discharge area of your chipper.
#241801
#
241811
#248821
#241831

43-POINT HITCH DR®SELF-FEEDING™ CHIPPER
#250581
#
227391
#248791
#
248831
#248841
#248811

CONTACT US AT www.DRpower.com 5
Protecting Yourself and Those Around You
Safety for Children and Pets
This is a high-powered machine, with moving parts operating with high energy at high speeds. You must operate the machine
safely. Unsafe operation can create a number of hazards for you, as well as anyone else in the nearby area. Always take the
following precautions when using this machine:
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 can 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 3-Point Hitch DR SELF-FEEDING Chipper.
Use ear protectors or ear plugs rated for at least 20 dba to protect your hearing.
Never allow people who are unfamiliar with these instructions to use the chipper. Allow only responsible individuals who are
familiar with these rules of safe operation to use your 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 with your hands.
Keep bystanders 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. Stop the engine when
another person or pet approaches.
Never use the machine without ensuring that all guards and shields are in place, including the chipper hopper, discharge
chute and blowback shield.
Always operate the machine from the operator zone (see chapter 4). Never pass or stand on the discharge side of the
machine when the engine is running or the flywheel is turning.
Never transport the Chipper with the PTO engaged and the Flywheel turning.
Clear the area of objects 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 3-point hitch DR SELF-
FEEDING Chipper. This includes all shields and guards. Modifications to your machine could cause personal injuries and
property damage and will void your warranty.
Tragic accidents can occur if the operator is not alert to the presence of children and pets. Children are often attracted to the
machine 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 under the watchful care of a responsible adult.
Be alert and turn the machine off if children or pets enter the work area.
Never allow children to operate the 3-Point Hitch DR SELF-FEEDING Chipper.

63-POINT HITCH DR®SELF-FEEDING™ CHIPPER
General Safety
Operating this chipper safely is necessary 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 chipper:
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.
The DR 3-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 3-Point Hitch DR SELF-FEEDING 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.
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.
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 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 removing processed material, leaves, or debris
from the machine.
If the cutting mechanism strikes a foreign object or if your machine should start making an unusual noise or vibration,
immediately 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 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. Check their proper operation regularly.
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 chapter 4. Personal injury or
damage to the machine could result.
While using the 3-Point Hitch DR SELF-FEEDING Chipper, don't 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 machine only in daylight.
Keep all nuts and bolts tight and keep the equipment in good operating condition.
Your 3-Point Hitch DR SELF-FEEDING 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.

CONTACT US AT www.DRpower.com 7
Before transporting, be certain the 3-Point Hitch DR SELF-FEEDING Chipper is correctly and securely attached to your tractor
and the safety chains of the PTO are in place.
Make sure the 3-Point Hitch DR SELF-FEEDING Chipper is raised high enough to clear all obstacles during transportation.
Never transport the machine for long distances.
Never allow anyone to ride on the 3-Point Hitch DR SELF-FEEDING Chipper.
Never transport anything on the machine.
Never transport the 3-Point Hitch DR SELF-FEEDING Chipper with the PTO engaged.
Obey local, state, and federal regulations when transporting the machine on public roads and highways.
Allow for added length in driving situations, e.g., when turning, parking, and crossing intersections.
Adjust your transportation speed for terrain and conditions.
Use caution when backing or turning. Be aware of the large turning radius required with the 3-Point Hitch DR SELF-FEEDING
Chipper attached to your tractor.
California Proposition 65:
This product contains or emits chemicals known to the State of California to cause cancer, birth defects, and other
reproductive harm.
Transportation Safety
California Proposition 65
A Note to All Users
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 this 3-Point Hitch DR SELF-FEEDING Chipper in a safe manner. Contact us at
www.DRpower.com or call 1-800-DR-OWNER (376-9637) for assistance.

83-POINT HITCH DR®SELF-FEEDING™ CHIPPER
Chapter 2: Setting Up Your 3-POINT HITCH DR SELF-FEEDING CHIPPER
This chapter outlines unpacking and a few simple steps you will need to follow to set up your new machine before you use it. It
may be helpful to familiarize yourself with the controls and features of your 3-POINT HITCH DR SELF-FEEDING CHIPPER as
shown in Figure 1 before beginning these procedures. If you have any questions at all, please feel free to contact us at
www.DRpower.com or call our Customer Service Representatives at our toll free number: 1-800-DR-OWNER (376-9637).
3-POINT HITCH DR SELF-FEEDING CHIPPER Controls and Features
Figure 1
Discharge
Chute
Hopper
A
ssembly
Chipper
Knife Access
Belt Guard
Blow-Back
Shield
3-Point Hitch
Mounting Pin
Support
Leg
Wear
Plate
Chipper
Kni
f
e
Belt
Tensioner
Belt
Idler
Pulley
Flywheel
Bearing
PTO
Bearing
2-Groove
Sheave
Cover Removed for Clarity

CONTACT US AT www.DRpower.com 9
Specifications
Tractor Horsepower Category 1 – 65 HP Max.
Drive Tractor PTO
PTO Speed 540 RPM
PTO Shaft Extension Sheave 14" – 2 Groove 3V
Chipping Capacity 4-3/4"
Rotor Speed 2,071 RPM
Rotor Pulley 3.65" DIA., 2 Groove 3V
Number of Chipper Knives 1
Chipper Knife Size 6-1/4" X 1-1/4" X 9/32"
Chipper Knife Material Heat Treated Tool Steel
Adjustable Knife Wear Plate Yes
Chipper Flywheel 17-3/4" DIA., 5/8" THK
Flywheel Weight 50 LBS.
Chipper Housing Material 12 GA Steel
Hopper Material 14 GA Steel
Belt 3V x 560/2 Groove
Belt Adjustment Spring Loaded Idler Pulley
Hopper Opening at Top 17" X 27"
Chipper Weight w/PTO Shaft 295 lbs.
Shipping Dimensions 54" L x 46" W x 46" H
Shipping Weight 382 lbs
Assembling the 3-POINT HITCH DR SELF-FEEDING CHIPPER
Parts supplied (Figure 2):
3-POINT HITCH DR SELF-FEEDING CHIPPER
Hopper Assembly
PTO Shaft Assembly(with PTO Manual)
Extended Top-Discharge Chute (if ordered, see Chapter 7 “Chipper
Accessories”)
Parts Box containing (Items below and Figure 2):
Discharge Chute
Safety &Operation Instructions Manual
Hardware Package (Figure 3 and List below)
Hardware Package Parts:
Item # Part # Description Qty
1 ........... 21154 .......Nylon Locknut, 5/16-18 ..............................1
2 ........... 35028 ....... Flat Washer, 5/16" ......................................8
3 ........... 16003 ....... Knife Gap Gauge .........................................1
4 ........... 14229 ....... Key, 1/4" X 1/4" X 1-1/4" ............................1
5 ........... 19423 .......Set Screw, 3/8-16 X 3/8" .............................2
6 ........... 37576 ....... Pin, Lift Arm (includes Pin, Hex Nut,
Thin Hex Nut and Lock Washer..................2
Figure 3
2
1
3
6
5
4
Discharge
Chute
Hardware
Package
Figure 2
Safety &Operating
Instructions Manual

10 3-POINT HITCH DR®SELF-FEEDING™ CHIPPER
Attaching the Hopper Assembly
Note: We recommend that you have someone help you lift the Hopper in place and
support it until it is secured to the Chipper.
Tools Needed:
Two 1/2" Wrenches
1. Remove and discard the three Shipping Nuts from the Housing Bolts with
two 1/2" Wrenches, but leave the Housing Bolts in place (Figure 4).
2. Position the Hopper Assembly onto the Housing Support and Stud and
secure the two upper Bolts to the Hopper Assembly with two 5/16-18
Locknuts and Washers using two 1/2" Wrenches. (Figure 5).
3. Secure the lower right Bolt to the Hopper Assembly with a 5/16-18 Locknut
(no Washer) using two 1/2" Wrenches.
4. Install a 5/16-18 Locknut and Flat Washer to the lower left Housing Stud and
secure with a 1/2" Wrench.
Attaching the Discharge Chute
Tools Needed:
Two 1/2" Wrenches
1. Remove the two 5/16-18 x 4-1/4" Bolts and Locknuts at the top of the
Chipper Assembly using two 1/2" Wrenches (Figure 6).
2. Position the Discharge Chute with the discharge opening facing away from
the Hopper as shown and secure with the two Bolts and Locknuts using two
1/2" Wrenches.
Figure 5
Hopper Assembly Chipper Assembly
Spacer
Bolt, Washer and
Locknut (Upper
Left and Right)
Locknut and
Washer (Lower
Left Stud)
Bolt and Locknut
(Lower Right)
Figure 6
Discharge
Chute
Bolts and
Locknuts
Bolts and
Locknuts
Figure 4
Housing
Stud
Housing
Support

CONTACT US AT www.DRpower.com 11
Installing Lift Arm Pins
There are two styles of Pins we use for the Lift Arm Pins. One style has a
shoulder and the other style does not. Installation methods for both styles are
explained here so follow the steps that apply to the style you received.
Tools Needed:
Large Philips Screwdriver (or Shaft)
Large Flat Head Screwdriver (or Pry Bar)
Large Adjustable Wrench
Tape Measure (needed to install pin with no shoulder only)
PIN INSTALLATION (WITH SHOULDER)
1. Position the Lock Washer and the Hex Nut inside the plate and channel
(Figure 7).
2. Insert the threaded end of the Lift Arm Pin through the pin plate of the frame
and thread it through the Hex Nut as far as you can by hand.
3. Hold the Hex Nut in place by inserting a large Screwdriver or Pry Bar into the
Channel and under the Nut.
4. While holding the Hex nut, insert a large Screwdriver or Shaft into the hole at
the end of the Pin and turn the Pin clockwise until tight.
5. Install the thin Hex Nut at the threaded end of the Pin and tighten with an
Adjustable Wrench (Figure 8).
6. Repeat steps 1 thru 5 for the other side.
Note: The orientation (pointing vertical or horizontal) of the hole at the end of the
Pin is not important.
PIN INSTALLATION (NO SHOULDER)
1. Position the Hex Nut inside the plate and channel (Figure 9).
2. Insert the threaded end of the Lift Arm Pin through the pin plate of the
frame and thread it into the Hex Nut.
3. Push the Pin in so the Locknut rests against the Frame and screw the Pin in
or out until the distance from the Pin Plate to the center of the hole in the
end of the Pin is 2-3/16" (1.1875).
4. Install the Lock Washer and thin Hex Nut onto the threaded end of the Pin
by hand (Figure 10).
5. Insert a large Screwdriver or Shaft into the hole at the end of the Pin and to
ensure the Pin does not turn as you tighten the thin Hex Nut with an
adjustable Wrench.
6. Repeat steps 1 thru 5 for the other side.
Note: The orientation (pointing vertical or horizontal) of the hole at the end of the
Pin is not important.
Figure 7
Lift Arm
Pin
Hex Nut
Lock Washe
r
Screwdriver
or Shaft
Screwdriver
or Pry Bar
Frame
Figure 8
Thin Hex Nut
Figure 9
Lift Arm
Pin
Hex Nut
against Frame
Frame
2-3/16"
(1.1875")
Figure 10
Thin Hex
Nut
Lock
Washer
Hold in
Position

12 3-POINT HITCH DR®SELF-FEEDING™ CHIPPER
Attaching the 3-POINT HITCH DR SELF-FEEDING CHIPPER
Note: The PTO Driveshaft provided with your new machine is sized to fit a standard
category 1 PTO (1-3/8" DIA. x 6" Spline).
The PTO shaft on the tractor that is to use this machine must rotate
clockwise when viewing the PTO from the rear of the tractor. If the PTO rotates
counterclockwise, you must have your tractor modified by installing a gearbox to
reverse the direction of rotation.
The length of the PTO Driveshaft that is included with your new machine may need
to be modified. See the procedure for checking the PTO Shaft length needed and
modification instructions in this chapter.
1. Back the Tractor to the Chipper and position the Lower Draft Arms near the
Chipper Hookup Pins (Figure 11).
2. Slide the Lower Draft Arms onto the Chipper Hookup Pins and secure with
Tractor Hitch Pins (Figure 12).
3. Position the Upper Draft Arm inside the Mounting Bracket and align with
the Mounting Bracket Holes (Figure 13).
4. Insert the Tractor Hitch Pin to secure the Upper Draft Arm to the Chipper.
Calculating length of PTO Shaft needed
The PTO Shaft provided with your Chipper is 27" overall compressed length and
will work for most applications without modifications. Before you install the
PTO Shaft it is good practice to run through the following dimension checks to
calculate optimum PTO Shaft length to determine if modifications are needed.
Without the PTO Shaft installed, use the table below to record the dimensions
as outlined in the following steps.
SHAFT TO SHAFT MEASUREMENTS
ON GROUND Inches
SHAFTS LEVEL Inches
FULLY RAISED Inches
1. Lower the Chipper all the way onto the ground in the operating position.
Measure from the end of the Tractor PTO Shaft to the end of the Chipper
PTO Shaft and record this dimension in the “ON GROUND” row of the
table above (Figure 14).
Figure 13
Upper (pivot)
Draft Arm
Tractor
Hitch Pin
Mounting
Bracket
Chipper
Mounting Hole
Figure 11
Lower (lifting)
Draft Arms
Upper (pivot) Draft
A
rm
Chipper
Hookup
Pin
s
Tractor
Hitch Pin
Figure 12
Before performing the following procedure, be sure your tractor engine is off,
brake is set, and the key removed for safety.
Figure 14
End of tractor
PTO shaft
Chipper on the
Ground
End of
Chipper PTO
Shaft

CONTACT US AT www.DRpower.com 13
2. Raise the Chipper up until the Tractor PTO Shaft and Chipper PTO Shaft are
parallel with each other. Measure from the end of the Tractor PTO Shaft to
the end of the Chipper PTO Shaft and record this dimension in the “SHAFTS
LEVEL” row of the table above (Figure 15).
3. Raise the Chipper up as far as it will go. Measure from the end of the Tractor
PTO Shaft to the end of the Chipper PTO Shaft and record this dimension in
the “FULLY RAISED” row of the table above (Figure 16).
Note: If your longest measurement exceeds 32" you will require a longer PTO Shaft.
Do not proceed with installation until you have a longer PTO Shaft. If you
have any questions, please visit us at www.DRpower.com or call 1-800-DR-
OWNER (376-9637).
4. Take the shortest recorded measurement you wrote in the table and add 2".
5. Take that number and subtract it from 27" (overall compressed length of the
supplied PTO Shaft).
6. This final number is the length that you will need to cut off of the PTO Shaft
for it to fit properly to your Tractor.
EXAMPLE: Let’s assume the shortest center-to-center measurement in the
table is 22".
22 + 2 = 24 (step 4 above)
27 – 24 = 3 (step 5 above)
You would be required to cut 3" off both halves of the PTO Shaft and 3" off of
the Guard.
Note: If you end up with 0" or a negative number, then no changes are needed until
you reach a maximum long measurement of 32" as indicated on previous
page.
If you have any questions, please visit us at www.DRpower.com or call 1-800-DR-
OWNER (376-9637).
Figure 15
End of tractor
PTO shaft
Chipper lifted off Ground until
Shafts are level with each other
End of Chipper
PTO Shaft
Figure 16
End of tractor
PTO shaft
Chipper lifted all the way
off the Ground
End of Chipper
PTO Shaft

14 3-POINT HITCH DR®SELF-FEEDING™ CHIPPER
Modifying the PTO Shaft-if required
The PTO Shaft included with your new DR Chipper may be too long for your
tractor. To shorten the Driveshaft, proceed as follows:
Tools and Supplies Needed:
Hacksaw
Bench Vise
Tape Measure
File
General purpose Lithium Grease
Philips Head Screw Driver
1. Separate the PTO Shaft Halves by pulling them apart.
2. Remove the 3 Philips Screws from the PTO shaft Halves (Figure 17).
Remove the PTO Guard.
3. Measure and cut the ends of both Guards the required amount (Figure 18).
NOTE: If you put the Guards in a vise to hold them, be careful not to clamp it too
tight because it could crack the plastic.
4. Measure and cut each Shaft Tubes to the required length using the hacksaw
(Figure 19).
5. File or sand any burrs from the Shaft ends.
6. Grease both Shaft Tubes and under the Bearing Rings of each Shaft (Figure
20).
7. Re-install the PTO Guard and tighten the 3- Philips Screws.
8. Slide the two PTO Shaft Halves together.
NOTE: When inserting one half of the PTO Shaft to the other you must line up the
splines correctly (two pointed splines and one flat spline).
See the following section to attach the PTO Shaft to the Tractor and Chipper.
Safety
Guard
Figure 18
Cut This
End
Shaft Tube
Figure 19
Bearing
Ring
Figure 20
Shaft
Tube
Figure 17
3-Philips
Screws
PTO Guard

CONTACT US AT www.DRpower.com 15
Attaching the PTO Shaft to the Tractor and Chipper
1. Insert the Key into the 3-Point Hitch Drive Shaft of the Chipper (Figure 21).
2. Align the Key Slot of the PTO Shaft with the Key in the Shaft and slide it onto
the Shaft.
NOTE: Do not allow the 3-Point Hitch Shaft to extend more than 1/4" into the U-
Joint. This will allow proper clearance to prevent hitting the Grease Fitting.
3. Secure the PTO Shaft with the two Set Screws from the Hardware Package.
NOTE: If you plan to leave the Chipper attached to the Tractor for extended periods,
apply thread lock to the Set Screws to help secure them in place.
4. Pull the Locking Ring while sliding the PTO shaft onto the Tractor PTO
Spline (Figure 22).
5. Release the Locking Ring and continue sliding the PTO Shaft on until the
Locking Ring releases and locks into the detent in the Tractor PTO Spline.
6. Secure the PTO Shaft Safety Chains to stationary parts of the Chipper Frame
and Tractor to stop the Guard from turning (Figure 23).
You must install the 1/4" X 1/4" X 1-1/4" key supplied in the hardware
package where the PTO shaft attaches to the chipper. Failure to do so will
result in damage to the machine and is not covered under warranty.
Figure 21
PTO
Shaft
3-Point
Hitch
Drive
Shaft
Key
Set
Screws
3-Point
Hitch
Drive
Shaft
1/4"
Max.
Figure 22
Locking
Ring
Tractor
PTO Spline
Figure 23
Safety
Chains
PTO Shaft

16 3-POINT HITCH DR®SELF-FEEDING™ CHIPPER
Chapter 3: Operating Your 3-POINT HITCH DR SELF-FEEDING CHIPPER
This chapter covers the procedures for starting and stopping your new 3-POINT HITCH DR SELF-FEEDING CHIPPER and
discusses basic operation features.
Starting the Chipper
NOTE: Some tractors may require the use of an Over Running Clutch. Consult your local dealer for more information.
1. Ensure that the Chipper is lowered to the ground and all Guards are in place and properly secured before using.
2. Remove any debris buildup from the machine before every use of the Chipper.
3. Set Tractor throttle at IDLE before engaging PTO with Chipper attached.
4. Increase Tractor throttle to the RUN RPM’s required to obtain 540 PTO speed before chipping.
5. Reduce Tractor throttle to IDLE before disengaging PTO.
NOTE: Check the Drive Belt, if necessary, after an initial break-in period of one (1) hour (see Chapter 5 “Maintaining the 3-POINT
HITCH DR SELF-FEEDING CHIPPER”).
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.
The DR 3-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, and can cause damage to the machine which is not covered under
warranty.
The design of this machine is for chipping wood. Never use this machine for any other purpose as it could cause serious
injury.
Contact with internal rotating parts will cause serious personal injury. Never put hands, face, feet, or clothing into chipper
hopper or discharge opening or near the discharge area or PTO shaft at any time.
Disengage 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 moving or performing maintenance/inspection on the
chipper. Use only a wooden stick to clear jammed material.
Never operate the machine without the hopper or discharge chute or PTO shaft properly installed.

CONTACT US AT www.DRpower.com 17
Use common sense when using the machine. Learn to recognize the change in sounds when overloaded. Disengage PTO and
turn off the tractor engine immediately if the machine becomes jammed to prevent damage to the drive system.
Operation Notes
Visually check the Chipper Knife for damage before each use of the
machine. See “VISUAL INSPECTION OF THE CHIPPER KNIFE
(before each use)” in Chapter 5 for info on accessing the Chipper
Knife.
Always operate the Tractor PTO at 540 RPM when chipping.
Only operate the DR SELF-FEEDING CHIPPER from the Operator
Zones shown in (Figure 24).
Keep proper balance and footing while operating the DR SELF-
FEEDING CHIPPER.
ALWAYS disengage the PTO when leaving the Operating Zones or
when moving the machine.
Never move the Chipper while the PTO is turning.
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 4-1/2" in diameter. Cut
your materials into manageable lengths before feeding them into the Chipper
Hopper.
Fi
g
ure 24
Operato
r
Zone
Operato
r
Zone
Discharge
A
rea
Top View
Hopper
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 SELF-FEEDING chipper.
Use ear protectors or ear plugs rated for at least 20 dba to protect your hearing.
The chipper hopper must be securely bolted to your DR SELF-FEEDING Chipper and the blowback shield in place before using the
machine!

18 3-POINT HITCH DR®SELF-FEEDING™ CHIPPER
Never throw remaining stubs or knots into the chipper hopper; damage will result.
Your DR SELF-FEEDING CHIPPER can process dry or green wood up to 4.75" 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 wood will process quicker and easier than dry wood.
Softwood processes easier than hardwood.
Your operator experience will teach you how different types of wood will chip and how fast you can process them.
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 SELF-FEEDING CHIPPER finishes processing material in the Hopper before disengaging the PTO
and shutting the Tractor engine off.
Do not force material into the Chipper. If the machine does not chip well, the Chipper 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 Chapter 5.
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.
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.

CONTACT US AT www.DRpower.com 19
Never pry against the scroll weldment when removing the deflector or discharge chute, or at any other time. This will cause
damage to the machine.
To Free a Jammed Flywheel
Tools Needed:
Two 1/2" Wrenches
Disassemble:
1. Disconnect the PTO Shaft.
2. Remove any material left in the Chipper Hopper.
3. Remove the two Bolts and Locknuts that secure the Discharge Chute to the
Chipper Basic Assembly with two 1/2" wrenches and then remove the
Discharge Chute (Figure 25).
4. Check to see if the Discharge Chute or Discharge opening is clogged. If it is,
clear it with a branch.
5. With a wooden stick, loosen and remove any material left in the Chipping
Chamber and make sure the Flywheel turns freely with the stick.
Reassemble:
1. Position the Discharge Chute onto the Chipper Basic Assembly and secure
with two Bolts and Locknuts using two 1/2" wrenches.
2. Reconnect the PTO Shaft, start the Tractor engine and engage the PTO;
allowing the remaining material in the Chipping Chamber to discharge.
3. If the Chipping Chamber doesn’t clear and the flywheel is still jammed,
repeat above process.
NOTE: Be certain the Flywheel turns freely before trying to process more material
into the Chipper Hopper.
Disengage 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 moving or performing maintenance/inspection on the chipper.
Figure 25
Discharge
Chute
Bolts and
Locknuts

20 3-POINT HITCH DR®SELF-FEEDING™ CHIPPER
Chapter 4: Maintaining Your 3-POINT HITCH DR SELF-FEEDING CHIPPER
This chapter covers regular maintenance procedures that will ensure the best performance and long life of your 3-POINT HITCH
DR SELF-FEEDING CHIPPER.
Maintenance Kits and Accessories are available through our website at www.DRpower.com.
Regular Maintenance Check List
NOTE: Consider that the service intervals shown are the maximum under normal operating conditions. Increase frequencies under
extremely dirty or dusty conditions. See the Owners Manual that came with the Tractor and with the PTO Shaft for Specific
Tractor and PTO Shaft maintenance.
Procedure Before
Each Use
Every 8-10
Hours
Every 18-20
Hours
Every 40
Hours
Check General Equipment Condition ▲
Check that the Flywheel turns freely (with a long stick
only) ▲
Visually inspect Knife for damage ▲
Check Knife and Wear Plate for Sharpness ▲
Check Knife and Wear Plate Attachment Screws ▲
Check Flywheel Bearing Collar Set Screws ▲
Check Knife to Wear Plate Gap ▲
Lubricate Flywheel Bearings ▲
Lubricate PTO Shaft Grease Fittings ▲
Lubricate PTO Sheave Bearings ▲
Check Belt Tension and Condition 1st time 1
hour
▲
Lubricate PTO Shaft Spline ends and center overlap ▲
Inspect or replace Drive Belt ▲
Disengage 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 moving or performing maintenance/inspection on the chipper.