Page 1
DUSRR
MODEL NUMBER
424/LCD/22
(249-623-003)
IMPORTANT:
•Read this Manual
Before Attempting
to Assemble and
LOG SPLITTER
Use
•Read Safety
Rules and
Instructions
Carefully
•Protect Your
Warranty —
Read “Important
Information for
Log Splitter
Users” (Page 2)
Carefully
DUERR INC. E. 12122 DAY MOUNT ROAD • MEAD, WA. 99021
(509) 238-6124
Page 2
IMPORTANT INFORMATION FOR LOG SPLITTER USERS
ALWAYS:
Use clean fluid and check fluid level regularl/
Use Dexron II Automatic Transmission Fluid
Use a fiiter (clean or replace regularly)
Use a breather cap on fluid reservoir
Keep end of reservoir return tube below fluid levei
Make certain pump is mounted and aligned properly
Use a flexible “spider” type coupling between engine
and pump driveshafts
Keep hoses clear and unblocked
Bleed air out of hoses before operating
Flush and clean hydraulic system before start jp after
any malfunction or servicing
Use “pipe dope” on aii hydraulic fittings
Aliow time for warmup before splitting wood
Prime the pump before initial startup by turni ig over
the engine with spark plug disconnected
Split wood with the grain (lengthwise) only
NEVER:
Use fluid below 0° F., or above 150° F.
Use a solid engine/pump coupling
Force pump when mounting
Operate through reiief valve for more than several
seconds
Attempt to adjust unloading or relief vaive settings
without pressure gauges
Operate with air in hydraulic system
Use Teflon tape on hydraulic fittings
Warm up engine apart from pump in cold weather
Attempt to cut wood across the grain
CONDITIONS WHICH WILL VOID YOUR WARRANTY
1. Failure to maintain proper fluid level ir reservoir will void your warranty, causing permanent damage to
pump by aliowing air to be drawn into pump. Fiuid will become foamy. Refer to “Initial Preparation” in the
Operation Section of this manuai.
2. Changing the relief valve setting or pressure adjustment of control valve without proper knowiedge and
instruction from the factory wiil void your warranty. A very minor adjustment couid destroy the structural and
safety limits for which the unit was desic ned. The system will produce more power than the structure will
withstand. Higher pressure could cause :he hoses to burst, cylinder to rupture and intense fluid reieases,
which could result in serious personal injury.
3. Disassembling the pump wiii void your warranty. If replacment is necessary, merely disconnect and replace.
Do not attempt to adjust pump settings, as they are adjusted by the manufacturer at the factory.
4. Use of incorrect hydraulic fluid will void your warranty. Use only Dexron II automatic transmission fluid.
Any other type of fluid must be approved by a direct factory representative.
5. The flexible pump coupler must be inspected regularly. Allowing the coupler to deteriorate will void your
warranty. Deterioration of spider insert and prolonged use after deterioration will destroy pump bearings and
engine bearings, along with total destruction of coupler hubs.
6. Improper beam lubrication will cause p emature wear and looseness. Lubricate the beam regularly. Lack
of lubrication will void your warranty.
7. Improper adjustment of splitting wedge: will void your warranty. Become familiar with the proper tolerance
required for adjustment of the splitting wedge as instructed in the adjustment section of this manual.
a. If wedge is too loose, cylinder beam ind wedge wear will result. Allowing the wedge to loosen and be
used under operating stress will cause damage which will not be covered under warranty.
b. If wedge is too tight, severe beam damage will result which will not be covered under warranty.
8. Warranty card must be mailed or delivered directly to factory. Proper information must be completed and
mailed as per instructions. No warranty ecords on file may result in delay.
9. Do not overheat the hydraulic system. Excessive heat will destroy the hydraulic system with hardened 0-rings
and excessive friction.
10. Do not attempt to start in temperatures under 20° F. without pre-heating fluid in reservoir. Excessively
cold fluid cannot circulate and draw into pump. Warranty will be void.
11. Repair any leaks in hydraulic system in mediately. Unattended leaks will cause air to enter system and/or
decrease fluid level in reservoir, causing di image to the hydraulic system which will not be covered by warranty.
Page 3
A
A
IMPORTANT
RULES FOR SAFE OPERATION
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 AT
TEMPTING TO OPERATE YOUR LOG SPLITTER. FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN PERSONAL IN
JURY. WHEN YOU SEE THIS SYMBOL-^HEED ITS WARNING.
DANGER
AC
Your log splitter 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.
TRAINING
Before operating this splitter, read and understand this manual
completely. Become familiar with it for your own safety. To fail
to do so may cause serious injury. Do not allow anyone to operate
your splitter who has not read this manual. Keep this manual in
a safe place for future and regular reference and for ordering
replacement parts.
2. Never use your splitter for any other purpose than splitting wood.
It is designed for this use and any other use may cause an injury.
Your log splitter is a precision piece of power equipment, not a
playtoy. Therefore, excercise extreme caution at all times.
3. Never allow children to operate your log splitter. Do not allow adults
to operate it without proper instruction. Only persons well ac
quainted with these rules of safe operation should be allowed to
use your log splitter.
4. Only the operator is to be near your log splitter during use. Keep
all others, including pets and children, a minimum of 20 feet away
from your work zone. Flying wood can be hazardous. If a helper
is assisting in loading logs, never activate the control until the helper
is clear of the area. More accidents occur when more than one
person operates the log splitter than at any other time.
5. No one should operate this unit while intoxicated or while taking
medication that impairs the senses or reactions. A clear mind is
essential for safety. Never allow a person who is tired or other
wise not alert to use your splitter.
8. Only operate your splitter on level ground and not on the side of
a hill. It could tip, or rolling logs or poor footing could cause an
accident. Operating the splitter on level ground also prevents the
spillage of gasoline from the fuel tank.
9. Never attempt to move the log splitter over hilly or uneven terrain
without a tow vehicle or adequate help.
10. Always block the wheels to prevent movement of log splitter while
in operation.
11. Check the fuel before starting the engine. Gasoline is an extreme
ly flammable fuel. Do not fill the gasoline tank indoors, when the
engine is running, or while the engine is still hot. Replace gasoline
cap securely and wipe off any spilled gasoline before starting the
engine as it may cause a fire or explosion.
12. Both ends of each log must be cut as square as possible to help
prevent the log from riding out of the splitter during operation.
A
OPERATION
1. Stand behind the reservoir tank when operating. See illustrations.
A
A
PREPARATION
1.
Never wear loose clothing or jewelry that can be caught by mov
ing parts of your log splitter and pull you into it. Keep clothing
away from all moving parts of your log splitter.
Wear proper head gear to keep hair away from moving parts.
Always wear protective hearing devices as needed.
3.
Always wear safety shoes. A dropped log can seriously injure your
foot.
4. Always wear safety glasses or goggles while operating your split
ter. A piece of splitting log could fly off and hit your eyes.
5. If you wear gloves, be sure they are tight fitting without loose cuffs
or draw strings.
6. Use your log splitter in daylight, or under good artificial light.
7. Never operate your splitter on slippery, wet, muddy or icy sur
faces. Safe footing is essential in preventing accidents. Never
operate your splitter while attached to a towing vehicle.
Page 4
2. Know how to stop the unit and disengage the con :rols.
3. Never place hands or feet between log and splitting wedge or be
tween log and end plate during forward or reverse stroke. To do
so may result in crushed or amputated fingers or tot s, or worse,
you may lose an arm or foot.
4. Do not straddle the splitter when using it. A siip in any position
could result in a serious injury.
5. Do not step over your iog splitter when the engine is unning. You
may trip or accidentally activate the splitting wedgn if you step
over. If you need to get to the other side, walk arDund.
6. Never try to split two logs on top of each other. One may fly out
and injure you.
7. When loading the log splitter, place your hands on the side of the
log, not at the ends. Never attempt to load your splitter while the
splitting wedge is in motion. You may get caught b/ the wedge
and injured.
8. Only use your hand to operate the splitting wedge or control lever.
Never use your foot or a rope or any other extension device. This
could result in your ability to stop your splitter quickly enough
and cause injury.
9. Always keep fingers away from any cracks that op( n in the log
during splitting operation. They can quickly close <nd pinch or
amputate your fingers.
10. Never attempt to split woods across the grain. Some t pes of wood
may burst or fly out of your splitter and result in i ijury to you
or a bystander.
11. For logs that are not cut square, the longest porticn of the log
should be rotated down and the most square end pi iced against
the splitting wedge.
12. Keep your work area clean. Immediately remove split wood around
your splitter so that you do not stumble over it. Clean chips and
dirt off end plate (wood platform) after each log is split, or whenever
necessary to maintain flat contact between wood a id end plate
(platform).
13. Never move the log splitter while the engine is rut ning.
14. Never leave your log splitter unattended with the ent ine running.
Shut off the engine if you are leaving your splitter, evt :n for a short
period of time. Someone could accidentally activate the splitting
wedge and be injured.
15. Do not run engine in an enclosed area. Exhaust gasej contain car
bon monoxide. This odorless gas can be deadly when inhaled.
16. Be careful not to touch the muffler after the engine has been run
ning as it is HOT.
17. If the equipment should start to vibrate abnormally, st( >p the engine
and check immediately for the cause. Vibration is geni ¡rally a warn
ing of trouble.
18. When cleaning, repairing or inspecting, make certain all moving
parts have stopped. Disconnect the spark plug wire ind keep the
wire away from the plug to prevent accidental sta ting.
MAINTENANCE
A
Do not operate your splitter in poor mechanical condition or when
in need of repair.
Periodically check that all nuts, bolts, screws, hose clamps and
hydraulic fittings are tight to be sure equipment is in >afe working
condition. Where appropriate, check all safety guards and shields
to be sure they are in the proper position. Never operite your split
ter with safety guards, shields or other protective featu es removed.
These safety devices are for your protection.
NOTE: 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 iipplicable local or state laws (if any). If
a spark arrester is used, it shouid be maintained in effect ve working order by the operator.
In the State of California the above is required by law (Seition 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 nearest engine authorized service dealer
or through DUERR INC.
3. Replace all damaged or worn parts such as hydraulic hoses and
fittings immediately with manufacturer approved replacement parts.
4. Do not change the engine governor settings or overspeed the,
engine. This increases the hazard of personal injury. The max
imum engine speed is preset by the manufacturer and is within
safety limits.
5. Do not alter your splitter in any manner such as attaching a rope
or extension to the control lever or adding to the width or height
of the wedge. Such alterations may cause your splitter to be unsafe.
6. Perform all recommended maintenance procedures before you use
your splitter.
7. Do not service or repair your log splitter without disconnecting
the spark plug wire.
8. Never store the equipment with gasoline in the tank inside of 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.
9. Always store gasoline in an approved, tightly sealed container.
Store the container in a cool, dry place. Do not store in a building
where ignition sources are present.
10. To reduce fire hazard, keep engine free of grass, leaves, wood
chips, and excessive grease and oil.
11. The hydraulic system of your log splitter requires careful inspec
tion, along with the mechanical parts. Be sure to replace frayed,
kinked, or otherwise damaged hydraulic components.
12. Fluid escaping from a very small hole can be almost invisible. Do
not check for leaks with your hand. Escaping fluid under pressure
can have sufficient force to penetrate skin, causing serious per
sonal injury. Leaks can be located by passing a piece of card
board or wood over the suspected leak and looking for
discoloration.
13. Should it become necessary to loosen or remove any hydraulic,
fitting or line, be sure to relieve all pressure by shutting off the
engine and moving the control handle back and forth several times.
14. Do not remove the cap from the hydraulic tank or reservoir while
your log splitter is running. Hot oil under pressure could cause
injury.
15. The pressure relief valve on your splitter is preset at the factory.
Do not adjust the valve. Only a qualified service technician should
perform this adjustment.
16. Completely drain fuel tank prior to storage. This guards against
accumulation of fuel fumes which could result in a fire hazard.
17. Never store log splitter outside without a waterproof cover. Rain
will cause rust on the inside of the cylinder.
A
TOWING
This unit should not be towed on any street, highway or public
road without checking the existing federal, local or state vehicle
requirements. Any licensing or modifications such as taillights,
etc., needed to comply with the existing federal, local or state
vehicle requirements is the sole responsibility of the purchaser.
Before towing, be certain the log splitter is correctly and securely
2.
attached to the towing vehicle, and the safety chains are in place.
Leave slack in chains for turning allowance.
3.
Do not allow anyone to sit or ride on your splitter. They can easily
fall off and be seriously injured.
4
Page 5
IMPORTANT
This unit has been shipped without
gasoiine or oil in the engine. After
assembiy, refer to separate engine
manual for proper fuel and engine oil
information.
„ . . „ Beam Support/
Engine and Reservoir Latch Bracket
Pump Assembly Tank Assembly I
ASSEMBLY
UNPACKING
Remove the log splitter parts from the cartons by cut
ting the corners of the cartons. Make certain all parts
and literature have been removed from the cartons
before the cartons are discarded.
All hardware for assembly of the log splitter has been
placed in position on the various parts.
s FIGURE 1.
Wedge, Beam and
Cylinder Assembly
-Hitch
Assembly Tongue Assembly
Beam
Hinge
Bracket
-Parts in Cartons (See figure 1)
Carton marked 1 of 2:
Reservoir Tank Assembly
Engine and Pump Assembly (Bolted to bottom of
carton)
Beam Hinge Bracket
Fenders (Not Shown)
Carton marked 2 of 2:
Tongue Assembly
Wedge, Beam and Cylinder Assembly
Hitch Assembly
Beam Support/Latch Bracket
Tools Required for Assembly
(2) 9/16" Wrenches*
(2) 1/2" Wrenches*
(1) Adjustable Wrench
(1) Knife (to remove cable tie)
(1) Screwdriver
*Adjustable Wrenches may be used.
Other Materials Required for Assembly:
Engine Oil
Unleaded Gasoline (regular grade gasoline is an
acceptable substitute)
Approximately 7.6 Gallons of Dexron II Automatic
Transmission Fluid
ATTACHING TONGUE TO RESERVOIR TANK
—1. The tongue is shipped with the jack stand already
attached to the tongue. The jack stand is in the
transport position. Remove the quick release pin.
Pivot the jack stand to the operating position (90°),
and secure with the quick release pin. See figure 2.
2. Remove the two hex bolts, lock washers and hex
nuts on the front of the reservoir tank. Two 9/16"
wrenches are required. Place the tongue in posi
tion, and secure with hardware just removed. See
figure 3.
Page 6
Hex Nuts
INSTALLING THE HITCH
1. Using two 9/16" wrenches, remove the two long
hex bolts, lock washers and hex nuts which are
assembled through the sides of the hitch. Do not
remove the chain and spacer from the one hex
bolt.
2.--Place the hitch in position on the end of the tongue
-------
as shown in figure 4. Secure with hardware just
removed.
ATTACHING THE WEDGE, BEAM AND CYLINDER ASSEMBLY
1. Stand the wedge, beam and cylinder assembly
upright.
2. Remove the cotter pin from the hinge pin, located
on top of the reservoir tank assembly. Place the
beam hinge bracket in position on the reservoir
-------
tank assembly as shown in figure 5. Secure with
hinge pin and cotter pin just removed.
3. Using two 9/16" wrenches, remove two hex bolts,
lock washers, hex nuts and the hinge back plate
and spacer from one side of the beam hinge
bracket. Move the reservoir tank assembly in posi
tion against the beam, sliding one edge of the
beam into the beam hinge bracket. See figure 5.
4. Place the spacer beside the beam. Secure with the
hinge back plate, hex bolts, lock washers and hex
nuts. Tighten securely.
Beam Support/
ATTACHING THE BEAM SUPPORT/LATCH BRACKET
1. Remove the two hex bolts, lock washers and hex
nuts from the tongue, using two 9/16" wrenches.
2. With the beam still in the upright position, place
the beam support/latch bracket on the tongue as
--------shown in figure 6. Secure with hex bolts, lock
washers and hex nuts just removed. Tighten
securely.
Page 7
ATTACHING THE ENGINE AND PUMP ASSEMBLY
1. Using two V2" wrenches, remove the four hex
bolts, lock washers and hex nuts which secure the
base of the engine to the bottom of the shipping
carton.
Piace the engine and pump assembly in position
2.
on the engine mounting bracket as shown in figure
-7. Secure with hardware just removed. Tighten
securely.
ATTACHING THE FENDERS
1. Using two Vz" wrenches, remove the hex nuts, lock
washers, flat washers and hex bolts from the
fender support brackets.
2. Place the fenders in position against the fender
support brackets. Insert hex bolts through holes
in support brackets and fenders. Secure with flat
washers, lock washers and hex nuts. See figure
--------
8. Tighten securely.
FIGURE 8.
©
FIGURE 9.
ATTACHING THE CONTROL HANDLE
1.
The control handle and the return hose are
attached to the metal pressure tube with a cable
tie for shipping purposes only. Cut and remove the
cable tie.
2.
The bottom of the control handle is already at
tached to the valve with a cotter pin and clevis pin.
Remove the second cotter pin and clevis pin which
are attached to the valve only. Place the handle
in position, and secure using the second cotter pin
-and clevis pin. See figure 9.
Page 8
Filter
Head
FIGURE 10.
'Control
Valve
Reservoir
Tank
Suction
Control
Valve
*ump
Hose
ATTACHING THE HOSES Suction Hose
1. The suction hose is attached to the reservoir tank,
beneath the engine mounting plate. Loosen the
hose clamp on the free end of the hose using a
screwdriver.
2.--Attach the end of the hose to the fitting on the bot-
--------tom of the pump. See figure 10. Place the hose
clamp at the base of the fitting, and tighten
securely.
Return Hose
1. The return hose is attached to the bottom of the
valve. Loosen the hose clamp on the free end of
the hose using a screwdriver.
2. Attach the end of the hose to the fitting on top of
the filter head. See figure 10. Place the hose clamp
at the base of the fitting, and tighten securely.
Pressure Hose
The pressure hose is attached to the top of the pump.
-Route the hose as shown in figure 11. Place the metal
pressure tube in position on the fitting on top of con
trol valve. Secure with the compression nut on the
pressure tube, using an adjustable wrench.
Metal
Pressure
Tjbe
FIGURE 11.
OPERATION
INITIAL PREPARATION
1. Place the log splitter on a firm, level surface.
2. Service engine with gasoline and oil as instructed
in the separate engine manual packed witf your
log splitter.
3. Lubricate the beam area where splitting wed( le will
slide with engine oil (DO NOT USE GREASE).
Make certain to oil both front and back of the beam
face.
4. Fill the reservoir tank as follows.
a. Remove reservoir vent plug. See figure 12.
Using Dexron II automatic transmission fluid,
fill reservoir to the top. Replace vent plug
securely.
FINAL ASSEMBLY
1. Make certain all nuts, bolts and hose clamps are
tightened securely.
2. Before operating the log splitter, make certain to
follow “Initial Preparation” instructions, below.
b. Disconnect the spark plug wire. Prime the
pump by pulling the recoil starter, to turn the
engine over, approximately 10 times. Recon
nect the spark plug wire.
Page 9
TO STOP ENGINE
1. Move throttle control lever to OFF position.
2. Disconnect spark plug wire from spark plug to pre
vent accidental starting while equipment is unat
tended.
USING THE LOG SPLITTER
Use the log splitter only on a level, hard surface.
Never stand next to the splitting wedge when
operating the log splitter. Always stand behind the
reservoir tank. See figures 14 and 15. Never attempt
to cut a log in half sideways. Always split the log
lengthwise. Maximum length of log to be split is 24".
If all logs are of a smaller length, refer to “Log
Dislodger” in Adjustment Section.
At
Always use the log splitter in the
vertical position only when splitting
heavy logs.
The control handle has three positions:
FORWARD—Push the control handle down for vertical
operation, push it forward for horizontal OperationSplitting wedge moves, toward the end plate. Con
trol handle will return to neutral position as soon as
handle is released.
NEUTRAL (Middle position)—Splitting wedge stops
in place.
REVERSE—Push the control handle upward for ver-
ical operation, push it toward the rear for horizontal
operation—Splitting wedge returns. The control han
dle will lock in the reverse position, and will return
to neutral automatically when the reverse stroke is
complete.
TO OPERATE LOG SPLITTER:
1. Set throttle at maximum speed.
2. Place the log upright, on top of end plate for ver
tical operation, and on top of beam for horizontal
operation.
3. Push the control handle in forward position until
the splitting wedge just contacts the log. Release
the control handle.
4. Step behind the reservoir tank (see figures 14
or 15) and push the control handle in forward posi
tion until the log is split.
5. Move the control handle to reverse position to
return the splitting wedge.
10
Page 10
Start engine. Use the control handle to 3xtend
c.
the wedge to the far extended position. Leave
the wedge in this position (do not retract).
Refill tank to within IV2" to 2" from the top of
d.
the tank. Total capacity of system is e pprox-
imately 7.6 gallons.
Now retract the wedge. Extend and retract the
e.
wedge fully 10 to 12 complete cycles to temove
trapped air in the system (system is “self
bleeding”).
Refill the reservoir to within 1V2" to 2" from
the top of the tank. Much of the original fluid
has been drawn into the cylinder and hoses.
Make certain to refill the reservoir, to prevent
extreme damage to the hydraulic pump. Failure
to refill the tank will void your warranty.
IMPORTANT
Reservoir tank must be full as
instructed. Low fluid level will damage
the pump and void your warranty.
3. Lubricate the beam area where splitting wedge will
slide with engine oil (DO NOT USE GREASE).
Make certain to oil both front and back of the beam
face.
4. Fill gasoline tank as instructed in separate engine
manual.
5. Attach spark plug wire to spark plug.
NOTE
Some fluid may overflow from the
vent plug as the system builds heal
and the fluid expands and seeks its
own level.
WARNiNG 1
Do not operate the log splitter withou :
A
the proper amount of transmissior
fuild in the reservoir tank.
♦♦♦♦♦♦♦♦
BEFORE STARTING
Before each use, check the following:
1. Place log splitter on a firm, level surface.
a. Vertical operation: Loosen the four bDits on
the beam hinge bracket. Refer to figure 5. Pull
the locking rod out and pivot it down to lelease
the beam. Move the beam as far from the hitch
as possible, then place the beam in the vertical
position. Tighten the hex nuts and bolts on the
beam hinge bracket so the log splittsr and
beam sit flat on the ground.
b. Horizontal operation: Make certain the beam
is adjusted to sit as far over the tongue as possi
ble (beam hinge bracket is against the stop as
shown in figure 15).
TO START ENGINE
1 Place throttle control lever on the engine in FAST
position. See figure 13.
2. Place choke lever In CHOKE position (a warm
engine may not require choking).
3. Grasp starter handle and pull rope out slowly until
engine reaches start of compression cycle (rope
will pull slightly harder at this point). Let the rope
rewind slowly.
NOTE
When restarting a warm engine, be care
ful to keep away from muffler and other
heated surfaces on the engine.
4. Pull rope with a rapid, continuous, full arm stroke.
Keep a firm grip on the starter handle. Let the rope
rewind slowly. Do not let starter handle snap back
against starter.
5. Repeat preceding instructions 3 and 4 until engine
fires. When engine starts, move choke lever
halfway between CHOKE and RUN.
6. Move throttle control lever to IDLE position for a
few minutes warm-up. Gradually move choke lever
to RUN position as engine warms up.
NOTE
A
WARNING
Beam must be positioned as shown ir
figure 15 when operating in the hori
zontal position.
2. Remove the vent plug and check the fluid level.
Fluid level should be 1V2" to 2" from the to 3 of the
tank.
In order to idle smoothly, a new
engine may require 3 to 5 minutes
running above slow idle speed. Idle
speed has been adjusted to be correct
after this break-in period.
7. If weather is cold, run wedge up and down beam
6 to 8 times to circulate the hydraulic fluid, which
will warm and thin the fluid.
Page 11
A
If the fluid becomes excessively hot at
any time during operation, stop the unit
and allow the fluid to cool down. Maxi
mum performance will not be obtained
from your log splitter if the fluid is too
hot. Use extreme caution as contacting
hot fluid could result in serious personal
injury.
WARNING
TO TRANSPORT LOG SPLITTER
1. Lower the beam to its horizontal position. Make
certain the beam is latched securely with the lock
ing rod.
2. Remove the quick release pin which secures the
jack stand. Pivot it up against the tongue, and
secure with the quick release pin.
3. Attach the hitch to a towing vehicle, making cer
tain to latch securely. Attach the safety chains to
the towing vehicle.
ADJUSTMENT
At WARNING (
Always stop the engine and disconnect
the spark plug wire before performing
any adjustments.
LOG DISLODGER
If the logs to be split are all of a standard length less
than 24", adjust the log dislodger as follows. See figure
15.
1. Remove the hex bolts, lock washers and hex nuts
which secure the log dislodger to the beam.
2. Move the log dislodger to the hole desired. Secure
with hardware just removed. Tighten securely.
Adjusting the log dislodger to accommodate smaller
logs will shorten the time required for the wedge to
make a complete cycle.
SPLITTING WEDGE
As normal wear occurs, periodically adjust the bolts on
the slide plate (beneath the splitting wedge) as follows
to eliminate the excess space between the wedge plate
and the beam. See figure 16.
1. Loosen the three hex bolts on top of the slide plate
(beneath the splitting wedge).
2. Back the two adjustment bolts on the side of the
slide plate out slowly until the wedge assembly will
slide on the beam. Tighten the lock nuts securely
against the base of the slide plate to hold the bolts
in this position.
3. Retighten the three hex bolts on top of the slide
plate.
CARBURETOR ADJUSTMENT
i WARNING i
A
If any adjustments are made to the
engine while the engine is running
(e.g. carburetor), keep clear of all moving
parts. Be careful of heated surfaces and
muffler.
Minor carburetor adjustment may be required to com
pensate for differences in fuel, temperature, altitude or
load. Improper adjustment will cause stalling when split
ter is under load, hard starting and higher fuel con
sumption.
Refer to the separate engine manual packed with your
log splitter for carburetor adjustment information.
^ ^ ^ ^ ^ ^ ^ ▼
NOTE
A DIRTY AIR CLEANER WILL CAUSE
ENGINE TO RUN ROUGH. BE CERTAIN
AIR CLEANER IS CLEAN AND AT
TACHED TO THE CARBURETOR
BEFORE ADJUSTING CARBURETOR.
DO NOT MAKE UNNECESSARY
ADJUSTMENTS. FACTORY SETTINGS
ARE SATISFACTORY FOR MOST
APPLICATIONS AND CONDITIONS.
MAINTENANCE
Ac Varn*ng
Always stop the engine and disconnect
the spark plug wire before performing
any maintenance or repairs.
11
Page 12
RESERVOIR FLUID
Check the hydraulic fluid level in the log splitter eservoir tank before each use. Fluid level should be 1V2"
to 2" from the top of the tank.
Change the hydraulic fluid in the reservoir ever / 100
hours of operation. Disconnect the suction hose from
the bottom of the reservoir tank, and drain the fliiid in
to a suitable container. Refill using only Dexron II
automatic transmission fluid, as instructed in ths “In
itial Preparation” section of this manual, pages B and
9. Also, make certain to change the hydraulic liter.
NOTE
Drain the fluid and flush the reservoir
tank and hoses with kerosene whenever
any repair work is performed on the
tank, hydraulic pump or valve. Con
taminants in the fluid will damage the
hydraulic components. (Should be per
formed by an authorized service dealer.)
conditions. Poor engine performance and flooding usually indicates that the air cleaner should be ser viced. To service the air cleaner refer to the separate engine manual packed with your unit.
The spark plug should be cleaned and the gap reset
once a season. Spark plug replacement is recommend
ed at the start of each season; check engine manual
for correct plug type and gap specification.
Clean the engine regularly with a cloth or brush. Keep
the cooling system (blower housing area) clean to per
mit proper air circulation which is essential to engine
performance and life. Be certain to remove ail dirt and
combustible debris from muffler area.
FLEXIBLE PUMP COUPLER
The flexible pump coupler is a nylon “spider” insert,
located between the pump and engine shaft. The align
ment is very critical. Over a period of time, the coupler
will harden and deteriorate. For a replacement flexible
pump coupler, order part number 717-0891.
A
Use extreme caution when working with
kerosene, as it is an extremely flammable
fluid.
t WARNING 1
HYDRAULIC FILTER
Change the hydraulic filter every 50 hours of ope ation.
Use only a 10 micron hydraulic filter. Order part number
723-0405.
BEAM AND SPLITTING WEDGE
Lubricate both sides of the beam where it contacts the
splitting wedge with engine oil before each use to ob
tain years of service. However, normal wear will accur.
The wedge plate on the log splitter is designed 30 the
gibs on the side of the wedge plate can be easily re
moved and rotated and/or turned over for even wear.
Make certain to readjust the adjustment bolts so wedge
moves freely, but no excess space exists betwesn the
wedge plate and beam.
HOSE CLAMPS
Check the hose clamps on the suction hose (attached
to bottom of the pump) for proper tightness befons each
use. Check the hose clamps on the return hose ct least
once a season.
ENGINE
Refer to the separate engine manual for all e ngine
maintenance instructions.
Maintain engine oil as instructed in the seaarate
engine manual packed with your unit. Read and follow
instructions carefully.
Service air cleaner every 25 hours under normal con
ditions. Clean every few hours under extremely dusty
A
I WARNING \
Never hit the pump shaft in any manner,
as any blow will cause permanent
damage to the pump.
When replacing the flexible pump coupling, proceed
as follows.
1. Place the coupling half onto the engine shaft. Make
certain there is clearance between the coupling
half and the engine. Tighten the set screw.
2. Mount the pump onto the coupling support bracket.
Tighten securely.
3. Carefully slide coupling half onto pump shaft (make
certain set screw is loose). Slide the key into place
on the shaft.
4. Install the nylon “spider” insert into coupling half
on the engine shaft.
5. Place the coupling shield in position on the hex
bolts. Rotate the keyway on the pump shaft so it
is toward the bottom.
6. Attach the coupiing support bracket to the hex
bolts, carefully sliding the coupling half over the
“spider” insert. Secure coupling shield and coup
ling support bracket with lock washers and hex
nuts. Tighten securely.
7. Adjust the two coupling halves (steel) so there is
between .010" and .060" clearance between the
two halves (at least the thickness of a matchbook
cover, up to 1/16" maximum). See figure 17.
Tighten the set screw in the coupling half on the
pump shaft.
12
Page 13
NOTE
Make certain proper clearance is ob
tained before tightening set screw.
PUMP
A
Ì WARNING t
DO NOT DRAIN FUEL WHILE
SMOKING, OR IF NEAR AN OPEN FIRE.
2. Drain all the oil from the crankcase (this should be
done after the engine has been operated and is
still warm) and refill the crankcase with fresh oil.
3. Protect the inside of the engine for storage as
follows.
Remove spark plug, pour approximately V2 ounce
(approximately one tablespoon) of engine oil into
cylinder and crank slowly to distribute oil. Replace
spark plug.
4. Clean the engine and the entire log splitter
thoroughly.
5. Wipe unit with an oiled rag to prevent rust,
especially wedge and beam.
TIRE PRESSURE
Check sidewall of tire for manufacturer’s recommended
maximum tire pressure. If this information does not ap
pear on your tire, maximum tire pressure under any cir
cumstances is 30 p.s.i. Equal pressure should be
maintained on both tires.
INSTALLATION OF TIRE TO RIM
i WARNING i
A
The following procedure must be fol
lowed when removing or installing a
tire to the rim.
1. Be certain rim is clean and free of rust.
2. Lubricate both the tire and rim generously.
3. Never inflate to over 30 p.s.i. to seat beads. Ex
cessive pressure when seating beads may cause
tire/rim assembly to burst with force sufficient to
cause serious injury.
^ ^ ^ ^ ^ ^
NOTE
When storing any type of power
equipment in an unventilated or metal
storage shed, care should be taken to
rustproof the equipment by coating with
a light oil or silicone.
6. The tongue can be removed and reattached in an
upright position as shown in figure 18 to take less
space when storing.
7. Store unit in a clean, dry area.
OFF-SEASON STORAGE
To avoid engine problems, the fuel system should be
emptied before storage of 30 days or longer. Follow
these instructions.
1. Drain the fuel tank. Start the engine, and let it run
until the fuel lines and carburetor are empty.
FIGURE 18.
13
Page 14
Trouble Shooting Guide
Trouble
Engine fails to start
Engine runs erratic
Engine overheats
Possible Cause(s|
1. Fuel tank empty, or stale fuel.
2. Blocked fuel life.
3. Spark plug wins disconnected.
4. Faulty spark pi jg.
1. Unit running on CHOKE.
2. Spark plug wins loose.
3. Blocked fuel lir e or stale fuel.
4. Water or dirt ir fuel system.
5. Dirty air cleane r.
6. Carburetor out of adjustment.
1. Engine oil leve low.
2. Air flow restricled.
3. Carburetor not adjusted properly.
Corrective Action
1. Fill tank with clean, fresh gasoline.
2. Clean fuel line.
3. Connect wire to spark plug.
4. Clean, adjust gap or replace.
1. Move choke lever to OFF position.
2. Connect and tighten spark plug
wire.
3. Clean fuel line; fill tank with clean
fresh gasoline.
4. Drain fuel tank. Refill with fresh
fuel.
5. Clean air cleaner as instructed in
separate engine manual.
6. Adjust carburetor (see Carburetor
Adjustment in separate engine
manual).
1. Fill crankcase with proper oil.
2. Remove blower housing and
clean as instructed in
separate engine manual.
3. Adjust carburetor (see Carburetor
Adjustment in separate engine
manual).
Will not split logs
Leaking cylinder
Reservoir fluid level low.
1. Broken seals.
2. Scored cylinder.
Check and fill reservoir tank as
instructed in Operation section
of this manual.
1. Replace seals.*
2. Replace cylinder.*
NOTE: For repairs beyond the minor adjustments listed above, please contact your nearest authorized service
dealer.
* Should be performed by an authorized ser/ice dealer only.
14
Page 15
HOW YOUR LOG SPLITTER OPERATES
Cylinder
Breather
Cap Unloading
Jl--, Valve
Reservoir
High Volume
Low Pressure
Gear Section
THE PUMP
A two-stage log splitter pump has one large and one
small gear section, using common inlet and outlet ports.
Below a preset pressure (called unloading pressure)
a check valve between the two gear sections allows
both flows to combine. Together, the two gear sections
create a large volume flow which produces rapid
cylinder movement under low load conditions.
Above unloading pressure, a pilot pressure line (which
simulates actual pressure at the cylinder) activates the
unloading valve, which causes the flow to bypass the
large gear section and return to the pump inlet area.
The small gear section is now operating alone, and will
generate the higher pressure necessary for the actual
log splitting operation.
The original factory setting for the unloading valve is
designed to provide maximum flow while remaining
below engine stalling load. Note: Splitting capabiiity
is not affected by the setting of the unloading valve.
Do not attempt to adjust or reset it without a
pressure gauge (should be performed by an
authorized service dealer only).
THE DIRECTIONAL VALVE AND CYLINDER
From the pump, oil flows to a four way, three position
directional valve. At the neutral position this valve
directs the flow back to the oil reservoir, bypassing the
cylinder. When the directional valve is directing the flow
to the back of the cylinder, the cylinder rod extends
quickly until it meets significant resistance. Upon
reaching unloading pressure, movement of the shaft
Cylinder
Directional
Valve
Relief Valve
Pilot
Pressure
Line
Pump
Low Volume
High Pressure
Gear Section
will slow but will continue forward. If the pressure
reaches a preset maximum (called relief valve pressure)
the relief valve, located within the directional valve, will
allow the flow to bypass the cylinder and return to the
reservoir. This can happen when the cylinder rod meets
excessive resistance, or when it reaches the end of its
stroke and can move no farther.
Note: Never operate at relief valve pressure for more
than a few seconds.
When the directional valve is directing the flow to the
front of the cylinder, the rod will retract quickly since
it is encountering no resistance. The relief valve will
momentarily bypass the flow at the end of the return
stroke but the directional valve should then automatical
ly return to the neutral position, directing the flow direct
ly into the reservoir. This serves to protect the pump
from possible damage due to prolonged operation at
relief valve pressure.
Because of the potential for system damage, the relief
valve is carefully and precisely preset by the
manufacturer.
Note: The user should not attempt to adjust or
change the setting of the relief valve.
OPERATIONAL PROBLEMS
If you have trouble with your log splitter, please refer
to the Hydraulic Trouble Shooting Guide on page 16.
Note: Readjustment of valves or disassembly of
pump should be performed by an authorized ser
vice dealer only.
15
Page 16
HYDRAULIC TROUBLE SHOOTING GUIDE
Problem Probable Cau!>e(s)
Cylinder rod wjll not
move
Slow cylinder shaft
speed while
extending and
retracting
Engine runs but
wood will not split,
or wood splits too
slowly
A Broken driveshaft
B Loose shaft coupling
C Gear sections damac ed
D Damaged relief valve
E Hydraulic lines block ;d
F Too little oil to pump
G Damaged directional valve
H Blocked directional v jIve
A Gear sections damac ed
B Excessive pump inie vacuum
C Slow engine speed
D Damaged relief valve
E Too little oil to pump
F Air in oil
G Directional valve leaking internally
H Internally damaged cylinder
A Small gear section d imaged
B Pump check valve leaking
C Excessive pump inIe: vacuum
D Low relief valve setti ig
E Too little oil to pump
F Air in oil
G Directional valve leal:ing internally
H Overloaded cylinder
1 Internally damaged c ylinder
Corrective Action
A Return pump for authorized repair
B Correct engine/pump alignment as necessary
C Return pump for authorized repair
D Return directional valve for authorized repair
E Flush and clean hydraulic system
F Add oil to reservoir
G Return directional valve for authorized repair
H Flush and clean hydraulic system; return
directional valve for authorized repair
A Return pump for authorized repair
B Make certain pump inlet hoses are clear
and unblocked—use short, large
diameter inlet hoses
C Return engine for authorized repair
D Return directional valve for authorized repair
E Add oil to reservoir
F Add oil, clean reservoir, make certain oil
return tube is below oil level
G Return directional valve for authorized repair
H Return cylinder for authorized repair
A Return pump for authorized repair
B Return pump for authorized repair
C Make certain pump inlet hoses are
clear and unblocked; use short, large
diameter inlet hoses
D Adjust valve while using pressure gauge*
E Add oil to reservoir
F Add oil, clean reservoir, make certain oil
return tube is below oil level
G Return directional valve for authorized repair
H Do not attempt to split wood against the grain
1 Return cylinder for authorized repair
Engine stalls during
splitting
Engine will not turn
or stalls under low
load conditions
Leaking pump shaft
seal
'Should be performed by an authorized service dealer only.
A Low horsepower/wec k engine
B High relief valve sett ng
C High unioading valve setting
D Overloaded cylinder
A Engine/pump misalic nment
B Frozen or seized pump
C Low horsepower/wee k engine
D Hydraulic lines blocked
E Blocked directional \ alve
A Broken driveshaft
B Engine/pump misalic nment
C Gear sections damaged
D Poorly positioned sh ift seal
E Plugged oil breather
A Return engine for authorized repair
B Adjust valve while using pressure gauge*
C Adjust valve while using pressure gauge*
D Do not attempt to split wood against the grain
A Correct alignment as necessary
B Return pump for authorized repair
C Return engine for authorized repair
D Flush and clean hydraulic system
E Flush and clean hydraulic system; return
directional valve for authorized repair
A Return pump for authorized repair
B Correct alignment as necessary
C Return pump for authorized repair
D Return pump for authorized repair
E Make certain reservoir is properly vented
16
Page 17
424/LCD/22 (Model 623) Pft¿:s^uR£
30ÛÛ то 3<3.ûû FS I
Î1
Page 18
424/LCD/22 (Model 623)
PARTS LIST FOR MODEL 623 LOG SPLITTER
REF.
NO.
10
11 781-0386
12
21 732-0583
31
T34 727-0440
r 35
41
PART
NO.
1 712-0299
714-0162
2
734-0873
3
734-1016 Wheel Ass’y- Comp.
4
734-0872
734-1017
734-0255
736-0351
5
741-0107
6
736-0921
7
737-0192
8
737-0238
9
750-0442
710-3104 N
712-3034 N
13
14 710-1010
710-1018
15
710-1032 N
16
17 712-0239
712-0333
18
712-3001
19
736-0192
20
22 750-0750 N
781-0393 N
23
781-0345 N
24
781-0350 N
25
781-0351 N
26
781-0352 N
27
781-0356
28
714-0203 N
29
30 715-0206
717-0893 N
717-0942
32
727-0307
33
737-6'i?1-£
37 737-0235
710-0521
39
710-0615A N
40
710-3130
42 711-0820
CODE
Hex Castle Nut 3/4-16 Thd. 43
Cotter pin 5/32" Dia.
Hub Cap
Tire Only
Rim Only
Air Valve
FI-Wash. .76" I.D. x 1.5" O.D. 51 736-0185
Roller Bearing
L-Wash. 1/2" I.D.*
90° Solid Male Adaptor 54
Pipe Nipple 1/2 NPT
Spacer 1.56" Lg. 56 781-0388 N Beam Support Ass’y.
N
Stripper Ass’yHex Bolt 1/2-13 X 21/4" Lg. 58 723-0406
(Grade 5)
Hex Nut 1/2-13 Thd. (Grade 5) 60 727-0309
Hex Bolt 1/2-20 X 3" Lg. 62
(Grade 8) 64 710-0520 Hex Bolt 3/8-16 X 1.5" Lg. (Gr! 5)
Hex Bolt 1/2-20 X 2.75" Lg.
(Grade 8) 68 738-0736 Hinge Pin
Hex Bolt 3/8-24 x 1.5" Lg.
Hex L-Nut 1/2-20 Thd.
Hex Nut 1/2-20 Thd. 72 781-0377 N Beam Hinge Spacer
Hex Jam Nut 3/8-24 Thd.
(Grade 5) 74 710-0237 Hex Bolt 5/16-24 x .62" Lg.
FI-Wash. .53" I.D. x .94" O.D.
Comp. Spring 4" Lg.
Spacer 1/2" I.D. x .86" Lg. 77 714-0122 Sq.-Key 3/16" x .75"
Wedge Ass’y. 78 717-0891 Flexible Coupling
Pusher Back Plate
Fixed Side Gib
Adjustable Gib
Adjustable Gib Shim 82 727-0427 N Suction Hose 1" I.D.
N Floating Gib Plate i lT83
External Cotter Pin 84 736-0119 L-Wash. 5/16" I.D.*
Cylinder Mounting Pin
N
Hydraulic Cylinder 86 781-0098
Control Valve 87 710-0157 Hex Bolt 5/16-24 x .75" Lg.
N
Metal Pressure Tube
N Pressure Tube 89
Zi>5
90° Solid Male Adaptor5(/<p c^aa
3/4" Hose Barb.
Hex Bolt 3/8-16 X 3" Lg.
(Grade 8) 93 781-0271
Hex Bolt 3/8-16 X 5" Lg. 94 781-0312 Strainer Ass’y.
Hex Bolt 3/8-16 X 3.25" Lg.
(Grade 8) 96 720-0231 N
Quick Release Pin 97
N
DESCRIPTION
REF.
NO.
/90
PART
NO.
712-0375
44 712-0798
45 713-0338
46 715-0249
47
727-0311
49 736-0116
736-0169 L-Wash. 3/8" I.D.*
50
52 750-0507 Spacer .27" Lg.
53 781-0358 N
781-0368 Tongue Tube
781-0370 N Locking Rod
55
57 723-0405
59
726-0146
781-0339
66 714-0470 Cotter Pin 1/8" Dia.
70 781-0373
71 781-0375 N Beam Hinge Back Plate
710-0117 Hex Bolt 5/16-24 X 1" Lg.
73
710-0363
75
76 712-0123
79 717-0936
80 719-0281
726-0132
81
727'0432-0
781-0097 Rear Coupling Support Brkt.
85
88 710-0409
—
736-0159 FI-Wash. .344" I.D. x .875" O.D.
737-0236 L-Vent Pipe Plug
91
92 735-0639 Spark Plug Boot
781-0376 N Tank Ass’y.
95
747-0709
CODE
Hex L-Nut 3/8-16 Thd.
Hex Nut 3/8-16 Thd.
Chain—Tow Hitch
Spring Roll Pin 5/32" Dia.
Hitch Coupler
FI-Wash. .635" I.D. x .93" O.D.
FI-Wash. .406" I.D. x .75" O.D.
Jack Stand Ass’y.
Filter Element
Filter Head
Adj. Hose Clamp
Return Hose 3/4" I.D. x 30" Lg.
N
Vertical Beam Ass’y.
N Beam Hinge
Hex Bolt 5/16-24 x 4" Lg.
Hex Nut 5/16-24 Thd.
N Two Volume Pump
Coupling Shield
Hose Clamp 5/8"
S33N
High Pressure Hydraulic Hose45®*’
Front Coupling Support Brkt.
Hex Bolt 5/16-24 x 1.75" Lg.
Engine
Fender
Ball Knob
N
Control Handle
DESCRIPTION
*For faster service obtain standard nuts, bolts and washers locally.
If these items cannot be obtained locally, order by part number and
size as shown on parts list.
19
NOTE: The engine is not under warranty by
the log splitter manufacturer...If repairs or
service is needed on the engine, please
contact your nearest author
ized engine service outlet.
Check the “Yellow Pages” of
your telephone book under
“Engines—Gasoline.”
Find If Fast
In The
Yellow Pages
Page 19
18 MONTH LIMITED WARRANTY
NON-COMMERCIAL
NON-TRANSFERABLE
Limited to Models PRO/20 and 424/LCD/22 Log Splitters
For 18 months from the date of original retail purchase, DUERR INC. will either repair or replace,
at its option, free of charge, F.O.B. factory or authorized service firm, any part or parts found
to be defective in material or workmanship. Transportation charges for the movement of any
power equipment unit or attachment aie the responsibility of the purchaser. Transportation
charges for any parts submitted for replacement under this warranty must be paid by the pur
chaser unless such return is requested by DUERR INC.
Warranty on units used commercially i{; limited to ninety (90) days.
This warranty will not apply to any part which has become inoperative due to normal wear,
misuse, excessive use, accident, negle:t, improper maintenance, alterations, modifications,
or unless the unit has been operated ard maintained in accordance with the instructions fur
nished. This warranty does not apply to t ie engine, pump, cylinder^jr component parts thereof.
Please refer to the applicable manufadurer’s warranty on these items?
Warranty service is available through your local authorized service dealer or distributor. If you
do not know the dealer or distributor in your area, please write to the Customer Service Depart
ment of DUERR INC.
Walve.
The return of a complete unit will not be i ccepted by the factory unless prior written permission
has been extended by DUERR, INC.
This warranty gives you specific legal rights. You may also have other rights which vary from
state to state. x
XtoMlESnC. UUKftiAKyr/ * ]? Mo.
futnp CVuiObER.* I /R.. From PuR. t)ATE\ o __
nJKL>.E= 3 XRS. OF TF№ OF liaise
Fill Out
Completely
and Retain
For Your
Records
Please
Complete
Warranty
Card and Mail
Date of Purchase Dealer Telephone Number
Purchased From
City State Zip
Model Number
Address
Serial Number
FORM NO. 770-6746D
(R880823)
DUERR INC. • MEAD, WASHINGTON 99021
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