MACKISSIC 12P User manual
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SECTION I –SAFETY
This symbol points out important safety instructions, which, if not followed,
could endanger the personal safety and/or property of yourself and others. Read and
follow all instructions in this manual before attempting to operate your
shredder/chipper. Failure to comply with these instructions may result in personal
injury. When you see this symbol - heed its warning.
THIS MACHINE IS CAPABLE OF INFLICTING SERIOUS INJURY IF
OPERATED IMPROPERLY -- READ WARNINGS & CAUTION LABELS.
INTENDED USE
Never use your shredder/chipper for any other purpose than shredding and chipping
limbs or other lawn and garden debris. It is designed for this use and any other use
many cause serious injury.
DANGER:Rotating cutting blade.
Keep hands and feet out of inlet and discharge opening while machine is
running.
DANGER: This machine can CRUSH, GRIND, CUT, and SEVER parts of your body if
they enter the inlet or discharge area of your shredder/chipper.
DANGER: Your shredder/chipper was built to be operated according to the rules for safe
operation in this manual. As with any type of power equipment, carelessness or error on
the part of the operator can result in serious injury. If you violate any of these rules, you
may cause serious injury to yourself or others.
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MAKE CERTAIN THAT ALL SAFETY LABELS ON THIS EQUIPMENT ARE
KEPT CLEAN AND IN GOOD CONDITION. IF YOU NEED REPLACEMENT
LABELS, ORDER BY PART NUMBER.
080-0962
080-0967
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080-0970
091-0055
091-0059
091-0088
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SAFE OPERATION PRACTICES
TRAINING
•Read this owner’s manual carefully in its entirety before attempting to assemble this machine. Read,
understand, and follow all instructions on the machine before operation. Be completely familiar with the
controls and the proper use of the machine before operating it. Keep this manual in a safe place for future and
regular reference and for ordering replacement parts.
•Know how to stop the unit and disengage the controls quickly.
•Never allow children to operate the unit. Never allow adults to operate the equipment without proper
instruction. Only responsible individuals who are familiar with these rules of safe operation should be allowed
to use your unit.
•Keep the area of operation clear of all persons, particularly small children and pets. Stop the engine when they
are in the vicinity of the unit. Keep work area clean and clear of branches or obstacles, which could cause you
to stumble or fall.
•Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people, their
property, and themselves.
•Your shredder/chipper is a powerful tool, not a plaything. Exercise extreme caution at all times. Your unit has
been designed to shred and chip. Do not use it for any other purpose.
•If situations occur which are not covered in this manual, use care and good judgment. Contact your place of
purchase for additional assistance.
PREPARATION
•Thoroughly inspect the area where the equipment is to be used and remove all foreign objects.
•Do not operate the machine without wearing adequate outer garments and safety goggles. Always wear safety
glasses or goggles during operation and while performing any adjustment or repair, to protect eyes from foreign
objects that may be thrown from the machine. Be sure your glasses or goggles fit properly.
•Avoid loose-fitting clothes and use protective footwear that will improve footing on slippery surfaces. Shirt and
slacks that cover the arms and legs and steel-toed shoes are recommended. Secure hair above shoulders. Do
not wear loose clothes or jewelry that can be caught in moving parts. Never operate a unit in bare feet, sandals
or sneakers. Wear gloves when feeding material into the shredder hopper or chipper chute. Be sure your
gloves fit properly and do not have loose cuffs or drawstring.
•Warning: Fuel is highly flammable and the vapors are explosive. Take the following precautions.
•Store fuel and oil in approved containers.
•Keep away from heat and open flame, and out of the reach of children.
•Refuel outdoors only and do not smoke while refueling.
•Check and add fuel before starting the engine. Never remove gas cap or add fuel while the engine is
running or when the engine is hot. Allow engine to cool before refueling.
•If fuel is spilled, do not attempt to start the engine but move the machine away from the area of spillage and
avoid creating any source of ignition until fuel vapors have disappeared.
•Replace all fuel tank and container caps securely.
•Never store the machine or fuel container inside where there is an open flame or spark, such as a gas hot
water heater, space heater, clothes dryer or furnace.
•To reduce fire hazard, keep engine and muffler free of debris build-up. Clean up fuel and oil spillage.
Allow unit to cool at least five minutes before storing.
•Never attempt to make any adjustments while the engine is running.
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OPERATION
•Never place your hands, feet, or any part of your body in the shredder hopper, chipper chute, discharge
opening, or near or under any moving part while the shredder/chipper is running. Keep clear of the discharge
opening at all times. If it becomes necessary to push material into the shredder hopper or chipper chute, use a
small diameter stick, NOT YOUR HANDS.
•Keep your face and body back from the shredder hopper and chipper chute to avoid accidental bounce back of
any material.
•The machine should only be operated on a level surface. Never operate your unit on a slippery, wet, muddy, or
icy surface.
•Exercise caution to avoid slipping or falling.
•Stay alert for hidden hazards or traffic. Do not carry passengers.
•If the cutting mechanism strikes a foreign object or if your machine should start making an unusual noise or
vibration, immediately stop the engine, remove the spark plug wire(s) and wait for all moving parts to come to a
complete stop. After the machine has come to a complete stop proceed as follows:
•Inspect for any damage.
•Repair or replace any damaged parts before restarting and operating the machine.
•If the machine should start to vibrate abnormally, immediately stop the engine, remove the spark plug wire(s)
and wait for all moving parts to come to a complete stop and inspect for the cause. Vibration is generally a
warning sign of trouble.
•Stop the engine when leaving the operating position, and when making any repairs, adjustments and
inspections.
•Take all possible precautions as recommended by the manufacturer when leaving the machine unattended.
Stop the engine and remove the key if so equipped.
•Before cleaning, repairing, or inspecting, shut off the engine and make certain the flywheel and all moving parts
have come to a complete stop. Disconnect the spark plug wire and keep the wire away from spark plug to
prevent accidental starting. Do not use flammable solutions to clean air filter.
•Never run this machine in an enclosed area as the exhaust from the engine contains carbon monoxide, which
is an odorless, tasteless, and deadly poisonous gas.
•Keep all guards and safety devices in place and operating properly. Do not operate the machine if all safety
guards are not in place.
•Do not use the unit with the shredder hopper or chipper hopper removed.
•The muffler and engine become hot and can cause a severe burn. Do not touch.
•Keep children and pets away.
•Tragic accidents can occur if the operator is not alert to the presence of small children.
•Keep children out of the work area and under the watchful eye of a responsible adult
other than the operator.
•Be alert and turn the unit off if a child enters the area.
•Never allow children to operate the shredder/chipper.
•Do not overload or attempt to shred or chip material beyond manufacturers recommendation. Personal injury
or damage to the machine could result.
•Never operate the machine at high transport speeds or on hard or slippery surfaces.
•Never allow bystanders near the unit while running.
•Only use accessories approved for this machine by the manufacturer. Read, understand, and follow all the
instructions provided with the approved accessory.
•Only operate unit in good daylight. Do not operate unit at night or in dark areas where your vision may be
impaired.
•Use extreme caution when reversing or pulling the machine towards you.
•Do not tamper with the engine’s governor setting. The governor controls the maximum safe operation 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. See your authorized dealer for engine governor adjustments.
•Start the engine according to the manufacturer’s instructions. Keep hands and feet away from inlet and
discharge areas.
•Never pick up or carry the machine while the engine is running.
•Do not operate while under the use of alcohol, drugs, or medication. A clear mind is essential for safety.
•Do not allow anyone who is not alert to operate this machine.
•When feeding material into this equipment, be extremely careful that pieces of metal, rocks, or other foreign
objects are not included. Personal injury or damage to the machine could result.
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•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.
•Do not 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 shredder hopper or chipper chute.
•Do not allow any part of the engine, especially around the cooling fans and muffler, to become clogged with
processed material, leaves, oil, grease or any other combustible material.
•Do not operate engine if air cleaner or cover over carburetor air-intake is removed, except for adjustment.
Removal of such parts could create a fire hazard.
MAINTENANCE AND STORAGE
•Keep machine, attachments and accessories in safe working condition.
•Check engine mounting bolts and other hardware at frequent intervals for proper tightness. Never operate your
shredder/chipper in poor mechanical condition or when in need of repair. Be sure all safety guards and shields
are in proper position. These safety devices are for your protection.
•Never store machine 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. Allow the engine to cool before storing in any enclosure.
•Always refer to the operator’s manual for important details if the machine is to be stored for an extended period.
•If the fuel tank is to be drained, do this outdoors.
•Follow the manufacturer’s recommendations for safe loading, unloading and storage of machine.
•If it is necessary for any reason to unclog the feed intake or discharge openings or to inspect or repair the
machine where a moving part can come in contact with your body or clothing, shut the machine off, allow all
moving parts to come to a complete stop and disconnect spark plug wire(s) before attempting to unclog, inspect
or repair.
•Check the knife mounting screws at frequent intervals for proper tightness. Also visually inspect the knife for
wear or damage. Replace the knife with parts that meet original equipment specifications.
•Knives should be checked for sharpness and the bolts attaching them to the flywheel for tightness every 8-10
hours of operation.
•Check the gap between the knife and the wear plate every time you sharpen or replace the knife, or every 8-10
hours of operation.
•Never tamper with safety devices. Check their proper operation regularly.
•Inspect the belt each time you use the unit. Look for damage, worn areas or tears. Do not use the unit if this
condition exists.
•Do not tamper with the engine’s governor setting. The governor controls the maximum safe operation 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. See your authorized dealer for engine governor adjustment
ADD OIL BEFORE INITIAL START UP!
THE ENGINE IS SHIPPED WITHOUT OIL.
ALWAYS CHECK OIL BEFORE STARTING MACHINE!
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OPERATOR ZONE
•Only operate your shredder/chipper from the
operator zone.
•Know how to turn your unit off.
•Never move your shredder/chipper or leave it unattended with the engine running.
•Follow engine owner’s manual for engine maintenance and repair.
YOUR RESPONSIBILITY
Restrict the use of this power machine to persons who read, understand, and follow the
warnings and instructions in this manual and on the machine.
SAVE THESE INSTRUCTION
FOR FUTURE REFERENCE
HAZARD: This unit is equipped with an internal combustion
engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the
engine’s exhaust system is equipped with a spark arrester
meeting applicable local or state laws (if any). If a spark arrester
is used, the operator should maintain it in effective working order.
In the State of California, the above is required by law (Section 4442 of the California Public
Resources Code). Other states may have similar laws. Federal laws apply on federal lands.
A spark arrester for the muffler is available through your Briggs & Stratton servicing dealer.
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SECTION II - ASSEMBLY INSTRUCTIONS
PACKAGE CONTENTS
SKID
POLYBAG
BOLTBAG 12P
BOLT BAG 12PT/PTE
BASIC MACHINE
OWNER'S MANUAL
2 EA 3/8-16X1” HHCS
4 EA –5/16-18 X ¾” CARRIAGE BOLT
CHIPPER HOPPER
ENGINE MANUAL
2 EA 3/8-16 NYLOCK NUT
4 EA –5/16 FLATWASHERS
HOPPER FLEX GUARD
WARRANTY CARD
4 EA 3/8-16 HEX NUT
4 EA –5/16-18 NYLOCK NUT
LH HANDLE (12P ONLY)
BOLTBAG
2 EA 3/8 INT. TOOTH LOCKWASHER
RH HANDLE (12P ONLY)
KNIFE GAUGE
2 EA 5/8 INT. TOOTH LOCKWASHER
2 EA 5/8-11 HEX NUT
12PTE
1 EA 5/16” SPACER
2 EA BLACK HANDLE GRIP
2 EA –RED PLASTIC KEY
4 EA –5/16-18 X ¾” CARRIAGE BOLT
4 EA –5/16 FLATWASHERS
4 EA –5/16-18 NYLOCK NUT
STEP I –UNPACKING AND CHECKING CONTENTS
1. Remove all items from the crate.
2. After unpacking the crate, compare the contents with the list above.
3. If assembling 12PT/PTE, compare bolt bag components with picture provided below.
4. If any parts are missing, contact your place of purchase at once.
5. Assembly should be done on a clean, level surface.
Bolt Bag Components
12PT/PTE
To start a 12PTE you must
insert the red plastic key as
shown below.
No key inserted –won’t start.
Key inserted –will start.
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STEP II –POSITIONING THE TOW TONGUE (on 12PT/PTE only)
DO THIS BEFORE ADDING GAS AND OIL TO YOUR MACHINE.
Your 12PT arrives like this.
Tilt machine onto discharge. Cut plastic tie attaching tow tongue to
axle and pull tow tongue forward.
Lower machine back down to all 4 wheels. Your machine is ready for further assembly.
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STEP IIa –Connecting the Battery Cable (Electric Start) (on 12PTE only)
We ship the electric-start with the negative terminal battery cable disconnected.
This prevents the battery from discharging during shipment.
Before using your electric start, you must connect the battery cable.
1. Slide the Terminal of the Negative Battery Cable onto
the Negative Terminal Lug of the Battery.
Negative
Battery
Cable
STEP III –INSTALLING THE CHIPPER HOPPER
1. Find and remove the four carriage bolts (item #51) from the bolt bag. Hold the chipper hopper (item #5) in
place and then bolt in place using the four carriage bolts through the square holes in the bottom of the hopper
going from the inside out. (See cut away A)
2. Place four flatwashers (item #36) and four Nylock nuts (item #37) on the end of each bolt. Secure tightly.
Positive Cable
Negative Cable
Battery
Positive Cable
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SECTION IV –INSTALLING THE SHREDDER HOPPER-FIG. 1 (If not installed from factory)
1. Place bolts (item #34,35) up through the machine and start to thread vibration dampeners on them to hold in
place. Set shredder hopper (item #2) in place on the vibration dampeners and secure them tightly. Place nylock
nuts (item #37) on in addition for added security.
FIG. 1 FIG. 2
STEP V –ATTACHING THE HOPPER FLEX GUARD TO THE SHREDDER HOPPER-FIG. 2 (If not installed
from factory)
1. Hold the hopper flex guard (item # 3) under the lip of the shredder hopper (item #2) and push the three push
button holders (item #4) from the bolt bag through the hopper and the guard.
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SECTION III - LUBRICATION & ENGINE START UP
FOR INFORMATION ABOUT:
❑OIL
❑FUEL
❑STARTING
❑STOPPING
❑RECOMMENDED MAINTENANCE
❑SERVICE
❑STORAGE
❑ENGINE WARRANTY INFORMATION
REFER TO THE ENGINE OWNER’S MANUAL.
THE ENGINE ON YOUR CHIPPER SHREDDER HAS BEEN SHIPPED DRY.
BE SURE TO SERVICE THE ENGINE ACCORDING TO THE ENGINE
OWNER’S MANUAL PRIOR TO STARTING.
FAILURE TO DO SO CAN RESULT IN DAMAGE NOT WARRANTIED BY THE
ENGINE MANUFACTURER.
WARNING: Do not fill closer than ½” from the top of the fuel tank to prevent spills and to allow for
fuel expansion. If gasoline is accidentally spilled, move the machine away from the area of the spill.
Avoid creating any source of ignition until gasoline vapors have disappeared.
CAUTION: Experience indicates that alcohol blended fuels (gasohol, ethanol, methanol) can attract moisture which
leads to separation and formation of acids during storage. Acidic gas can damage the fuel system or an entire
engine while in storage. To avoid engine problems, the fuel system should be empty before storage for periods
over 30 days. For more information, refer to the engine owner’s manual. Use fresh fuel each season. Never use
engine or carburetor cleaner products in the fuel tank or permanent damage may result.
ALWAYS CHECK OIL LEVEL PRIOR TO
STARTING THE CHIPPER SHREDDER.
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SECTION IV –SHREDDING & CHIPPING
THIS SHREDDER/CHIPPER WAS DESIGNED FOR SHREDDING LEAFY GARDEN OR
ORGANIC MATERIAL AND CHIPPING LIMBS OR BRANCHES. NEVER USE THIS
MACHINE FOR ANY OTHER PURPOSE AS IT COULD CAUSE SERIOUS INJURY.
CONTACT WITH INTERNAL ROTATING HAMMERS WILL CAUSE SERIOUS PERSONAL
INJURY. DO NOT PUT HANDS, FACE, FEET OR CLOTHING INTO THE SHREDDER
HOPPER, CHIPPER CHUTE, DISCHARGE OPENING OR NEAR THE DISCHARGE AREA AT
ANY TIME.
MAINTENANCE AND SERVICE SHOULD ONLY BE PERFORMED AFTER THE ENGINE IS
TURNED OFF AND ALL MOVING PARTS HAVE COME TO A COMPLETE STOP. USE
ONLY A WOODEN STICK TO CLEAR JAMMED MATERIAL AFTER ALL MOVING PARTS
HAVE STOPPED COMPLETELY.
SAFETY FIRST
•Always wear protective gloves and safety glasses during operation of the
shredder/chipper.
•Never allow your hands or any part of your body or clothing inside the feed hoppers or
discharge area of the shredder/chipper.
•Always keep all protective guards and warning labels on the machine and in good
working condition.
•Always stand clear of the discharge area when the shredder/chipper is running.
•Always keep your face and body back from the feed hoppers to avoid being struck by
any material that may bounce back.
•Always keep proper balance and footing while operating the shredder/chipper.
•Always use a wooden stick, never your hands, to push material into the feed hoppers.
•Never assume you know where the chipper knife is. You do not know where it is.
•Always keep area of discharge clear of everyone and everything to avoid injuries and
property damage. Wind can also change discharge direction, so be aware.
•Always keep hands out of all the feed hoppers.
•Never operate the shredder/chipper without the hoppers properly installed.
•Never transport the shredder/chipper with the engine running.
PROCESSING MATERIAL
•Your shredder/chipper can process dry or green material.
•Green material will process quicker and easier than dry material.
•Soft wood processes easier the hard wood.
•Your operator experience will teach you how different materials shred and chip.
•Your operator experience will teach you how fast you can process different materials.
•Most materials process well with the standard screen provided with the unit.
•When chipping branches, sometimes a tail will be left at the end of a branch. To avoid
this, rotate the branch as it is fed into the chute.
•Rotating the branch as you feed it into the machine will improve chipping performance.
•An optional screen is available for greater reduction of the material being processed
through the shredder hopper.
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USING THE SHREDDER HOPPER
•The shredder hopper is located on the top of the unit and is the opening into which all materials to be shredded
should be fed. Most organic materials can be shredded. A flex guard, or blowback shield is secured to the
hopper. Material must be pushed past this flap by using a wooden stick in order to enter the main shredding
chamber where revolving steel hammers do the shredding. The blowback shield is an important feature. It
prevents kickback of materials! Do not use your machine unless the blowback shield is securely
fastened in place.
•Due to the wide variety of materials that can be shredded, and their very different physical characteristics,
initially only feed limited quantities of any material into the hopper. The amount and length of material can be
increased if you find that the material is being processed easily. Your judgment and operator experience is
very important. Be sure not to overload the machine by feeding too much material into the hopper at one time.
If you hear the RPM’s of the engine decreasing, stop feeding material into the machine at once. Do not resume
feeding the machine until it has returned to full speed.
•The maximum diameter of material that can be shredded is 1”. Any larger material should be fed through the
chipper-hopper. Material larger than 1” can cause serious damage to any of the internal parts of the shredding
chamber. The unit should be inspected after every use for bent hammers, missing spacers, damage to the
screen or any other obvious problems. If damage occurs, the rotor assembly can become unbalanced causing
excessive vibration. If used in this state, damage can occur. Do not use the machine if vibration is present.
Vibration is generally a warning sign of trouble.
•Several small branches can be fed into the shredder-hopper at once providing their combined diameter is less
than 1”. Branches longer than three feet should be cut to make them more manageable while feeding. Green
materials should be allowed to dry, or processed in small batches with dry materials to avoid winding around
the rotor assembly.
•Wet materials will clog the machine easily. They are best processed with the optional bar screen.
MATERIALS BEST SUITED FOR SHREDDING
•Leaves
•Roots
•Grass clippings
•Straw
•Hay
•Small branches
•Flowers
•Soil
•Garden debris
•Hedge clippings
•Kitchen Waste
•Manure
•Corn Stalks
•Palm frond tops
•Potato vines
•Tomato vines
•Paper
NOTE - The hammers within the shredding chamber can tug suddenly at material being
fed into the shredder-hopper. Do not hold on tightly to branches and vines, and don’t
feed material straight down into the hopper with your arm pointing downward toward
the opening. Instead, keep your arms parallel to the ground and several inches above
the top edge of the hopper.
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USING THE CHIPPER HOPPER
•This chipper-hopper is mounted on the side of the machine and is designed to chip the larger, heavier materials that
the shredder-hopper isn’t designed to handle. Branches fed into the chute are turned into “chips” by the revolving
chipper knife mounted on a flywheel. The chipper-hopper can chip branches and vines ranging in size from 1” to 3”
in diameter. Cut your materials into manageable lengths before feeding them into the chipper.
Note: The chipper hopper must be securely bolted to the side of your equipment before using the machine!
•Do not force material into the chipper. If the machine does not chip 1’’ to 3’’ diameter sticks easily, the chipper
knives need to be either replaced, sharpened or the gap between the knife and the wear plate needs adjusting.
•Extremely hard knots will not process very well. Short stubs that have not self-fed through the chipper can be
pushed through with the next branch to be chipped. DO NOT THROW REMAINING STUBS OR UNCHIPPABLE
KNOTS INTO THE SHREDDER-HOPPER. DAMAGE WILL RESULT.
•Cut chipping material into manageable lengths of no more than five or six feet long before chipping them.
•If branches are larger than 1” in diameter, feed only one branch at a time through the chipper hopper.
•Branches smaller than 1” in diameter can be bundled together and fed through the chipper hopper at one time.
•Overloading the shredder/chipper will cause the rotor speed to decrease. If you hear the RPM’s decreasing, stop
feeding material into the machine until the machine has returned to full speed.
MATERIALS BEST SUITED FOR CHIPPING.
•Branches, vines or stalks from 1” to 3” in diameter.
USE COMMON SENSE WHEN USING YOUR SHREDDER/CHIPPER.
•Learn to recognize the change in the sound of your machine when it is overloaded.
•Become familiar with successful operating conditions and avoid those that can overload and damage
the machine
•Stop the machine immediately if the machine becomes jammed for any reason.
•If you jam the machine and do not stop the engine, it can damage the machine. This damage can be costly and it
may not be covered under warranty. For this reason, it is important that you immediately stop the engine if the
machine becomes jammed.
•Only your operator experience will tell you how fast to feed the material to be processed.
•Check to see that the flywheel will turn freely before you start the shredder/chipper.
•Visually check chipper knife for damage each time you use your shredder/chipper.
•Check the knife condition; wear plate condition, gap setting and the nuts and bolts that hold the knife in place for
tightness after every 8-10 hours of operation.
•Do not allow processed material to build up within 3’’ of discharge chute opening. Move shredder/chipper or pile
as needed. Failure to do this could result in unnecessary jamming of the machine.
•Use a spade, rake or other long handled tool to move pile of processed material. NEVER use your hands or feet!
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SECTION V –MAINTENANCE & STORAGE
IMPORTANT: The knife should be checked for sharpness and the bolts attaching them to the flywheel for
tightness every 8-10 hours of operation.
IMPORTANT: Every time you perform maintenance or any kind of service or check on the knife, be sure to check
the gap between the knife and wear plate for proper setting.
NOTE: A knife gauge has been provided with your machine. It is 1/16th” thick and should be used to set the
correct gap between the knife and wear plate.
If the cutting mechanism strikes any foreign object or if your machine should start making an unusual noise or is
vibrating, stop the engine, disconnect the spark plug wire(s) from the spark plug(s). Allow the engine to cool before
you: a. Inspect and examine for damage.
b. Check for loose nuts, bolts or parts.
c. Repair or replace any damaged parts before restarting and operating the machine.
1. When not in use, your shredder/chipper should be stored out of the reach of children. Be sure that there are no
gasoline fumes in the storage area. For long periods of storage (over the winter), refer to the engine owner’s manual.
2. After every 8 hours of operation, lubricate the chipper side bearing. To do this, wipe all dirt, etc., from the grease
fittings with a clean cloth, then apply no more than 3 shots of quality general-purpose grease with a hand-pumped
grease gun. Over lubrication can also damage the bearings. Also, check the bearing collar set screws regularly to be
sure they are tight. If they are loose, reset them with Loctite 243, obtainable at any hardware store.
3. You will find information included referring to operation and maintenance of the engine. Look it over carefully. BE
CERTAIN TO ADD OIL BEFORE STARTING IT.
4. When the chipper knife needs replacing or sharpening, refer to the section on removal, sharpening and re-installation.
5. Care must be exercised when sharpening the knife to maintain the correct bevel and a straight edge. Refer to
sharpening directions. When you install a knife, the clearance between the knife and wear plate must be checked and
set. This clearance or gap should be set to 1/16” (see figure 1).
6. To adjust this clearance, loosen the three ¼” nuts and bolts
holding the wear plate in place. The wear plate can be slid up or
down (in or out) to achieve the correct gap setting.
7. Take the knife gauge and slide between the knife and wear plate. If
the gap is set correctly, the knife gauge will lightly touch both the
knife and wear plate. If the gap is too small, you will not be able to
get the gauge between the knife and the wear plate. If the gap is
too large, there will be excess room between the knife gauge,
knife and wear plate. Tighten the nuts and bolts when the wear
plate is in the correct position. Be certain the flywheel rotates
without hitting anything before starting the chipper.
8. If the gap between the wear plate and the knife is not set
correctly, you will have excessive vibration when chipping and the
blade will seem to be dull. This should be checked every 8-10
hours of operation.
9. If at any time it becomes necessary to disassemble the chipper for
repairs, the chipper disk must be re-installed in exactly the same
position on the rotor shaft.
NOTE: Proper gap setting is critical to the proper operation of your machine.
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REMOVAL, SHARPENING AND RE-INSTALLATION OF CHIPPER KNIFE
HOW TO REMOVE THE KNIFE
•Stop the engine.
•Remove spark plug wire(s) and keep away from spark plug(s).
•Disconnect battery at negative terminal.
•Open the access cover on the chipper basic machine.
•Rotate the chipper disk with a wooden stick until the three countersunk screws attaching the knife to the flywheel
are visible through the access door.
•Clean out the heads of the allen screws with an awl or another small sharp tool.
•Insert a 3/16” allen wrench into the heads of the screws.
•While applying pressure with the allen wrench, apply a small amount of heat from a propane torch to the screws
to break loose the Loctite on the screws.
•Remove the heat once the screws have initially loosened.
•Remove all three allen screws in this manner.
KNIFE SHARPENING
•You should never attempt to sharpen the chipper knife (or knives) freehand.
•It is extremely important that the 45-degree angle be maintained consistently for proper performance.
•The chipper knife (or knives) should be taken to a machine shop for proper sharpening.
•Excessive heat generated during the sharpening process will damage knives and weaken the metal. Be sure the
knife is not overheated.
KNIFE INFORMATION
•The chipper knife should be checked routinely for sharpness.
•Using a dull knife will decrease performance and cause excessive vibration that will cause damage to the
shredder/chipper.
•How many times a knife can be sharpened is determined by how much material needs to be taken off to sharpen
or to compensate for dents or gouges.
•A new chipper knife has 5/16” measurement between the short side bevel edge and the knife mounting holes.
See figure 2.
Figure 2
20
•The knife should never be sharpened to the extent that more than 3/32” is taken off this measurement.
•Once this measurement is below 7/32” (see figure 3) the knife should be replaced.
•If you are unable to remove dents or gouges with these guidelines, replace the knife.
Figure 3
KNIFE INSTALLATION
•Clean chipper disk where knife is going to be attached.
•Visually inspect the chipper disk slot and knife mounting area and be sure they are clean and that the knife will be
able to mount flush against the chipper disk.
•Visually inspect and clean the knife.
•Apply Loctite 243 to the screws that hold the knife in place.
•Hand tighten the knife to the chipper disk. If you are installing a new knife, use the new hardware that comes with
the knife when attaching it to the chipper disk.
•Tighten the center bolt.
•Tighten the outer bolt.
•Tighten the inner bolt.
•Double-check all three for tightness one more time.
WEAR PLATE
•The wear plate should have a square edge and be free of dents or gouges.
•The wear plate can be sharpened by hand, but as with the knife, do not overheat during the sharpening process.
This will change the characteristics of the steel and it should be replaced.
•Check the gap between the knife and wear plate every time any adjustments are done to either piece, or after
every 8-10 hours of operation.
This manual suits for next models
2
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