MTD 245-642-000 User manual

5 AND 8 H.P.
LOG SPLITTERS
Model Numbers
245-642-000
245-645-000
24642S
24645S
Important:
Read Safety Rules and
Instructions Carefully
Thank you for purchasing
an American-built product.
J
PRINTED IN U.S.A.
FORM NO. 770-3966

1
INDEX
Safe Operation Practices
Assembly Instructions . .
Operation .
Maintenance .
3 Off-Season Storage . 11
5 Illustrated Parts.12, 14
8 Repair Parts List.13,14
10 Trouble Shooting Chart.15
A Instructions given with this symbol
are for personal safety. Be sure to
follow them.
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V
LIMITED WARRANTY
For one year from the date of orig
repair or replace, at its option, free c
part or parts found to be defective ii
the movement of any power equipm<
chaser. Transportation charges for a
ty must be paid by the purchaser uni
nal retail purchase, MTD PRODUCTS INC will either
f charge, F.O.B. factory or authorized service firm, any
i material or workmanship. Transportation charges for
?nt unit or attachment are the responsibility of the pur-
ny parts submitted for replacement under this warran-
ess such return is requested by MTD PRODUCTS INC.
This warranty will not apply to any part which has become inoperative due to misuse, ex¬
cessive use, accident, neglect, improper maintenance, alterations, or unless the unit has
been operated and maintained in ac ;ordance with the instructions furnished. This warran¬
ty does not apply tothe engine, moti >r, battery, battery chargeror component parts thereof.
Please refer to the applicable manufacturer’s warranty on these items.
This warranty will not apply where the unit has been used commercially.
Warranty service is available throug n your local authorized service dealer or distributor. If
you do not know the dealer or distrit utor in your area, please write to the Customer Service
Department of MTD.
The return of a complete unit will not be accepted by the factory unless prior written per¬
mission has been extended by MTC.
This warranty gives you specific leqal rights. You may also have other rights which vary
from state to state.
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WARNING
This unit is equipped with an internal combustion engine and should not be used on or near any unim¬
proved 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, it should be
maintained in effective working order by the operator.
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. Fe feral laws apply on federal lands. A spark arrester muffler is
available at your nearest engine authorized service center.
2

▲ IMPORTANT
It is suggested that this manual be read in its entirety before attemtping to assemble or operate. Keep this manual
a safe place for future reference and for ordering replacement parts.
nis unit is shipped WITHOUT GASOLINE or 01L. After assembly, see separate engine manual for proper fuel and
engine oil recommendations.
Your log splitter is a precision piece of power equipment, not a plaything. Therefore exercise extreme caution at all
times. Mk
A SAFE OPERATION PRACTICES FOR LOG SPLITTERS
OPERATION
TRAINING
1. Know the controls and how to stop quickly-
READ THIS OWNER'S MANUAL.
2. Do not allow children to operate. Do not allow
adults to operate it without proper instruction.
Only persons well acquainted with these rules of
safe operation should be allowed to use your log
splitter.
3. No one should operate this unit while intoxicated
or while taking medication that impairs the senses
or reactions.
4. Never use your splitter for any other purpose
than splitting wood. It is designed for this use
only and any other use may cause an injury.
5. Only the operator is to be near your log splitter
during use. Keep all others, including pets, a
—v minimum of 20 feet away from your work zone.
Flying wood can be hazardous.
6. Don't step over your splitter when engine is
running. You may trip or accidentally activate
ram if you step over. If you need to get to the
other side, walk around.
PREPARATION
1. Do not wear loose fitting clothing that could get
caught on the moving parts.
2. Do not operate equipment when barefoot or
wearing open sandals. Always wear safety shoes or
heavy boots. A dropped log can seriously injure
your foot.
3. Check the fuel before starting the engine. Do not
fill the gasoline tank indoors, when the engine is
running, or while the engine is still hot. Wipe off
any spilled gasoline before starting the engine.
4. Use only in daylight or in good artificial light.
5. Never operate your splitter on slippery, wet,
muddy, or icy surfaces. Safe footing is essential in
preventing accidents. Never operate your splitter
while attached to a towing vehicle.
6. Always wear safety glasses or goggles while oper-
ating your log splitter. A piece of splitting log
could fly off and hit your eyes.
7. Both ends of each log must be cut square. This
will prevent the log from flying out of the splitter
while under pressure.
1. Do not change the engine governor settings or
overspeed the engine. Excessive engine speeds are
dangerous.
2. Never place hands or feet between log and split¬
ting wedge or between log and ram during forward
or reverse stroke. To do so may result in crushed
or amputated fingers or toes, or worse, you may
lose an arm or foot.
3. If the equipment should start to vibrate abnor¬
mally, stop the engine and check immediately for
the cause. Vibration is generally a warning of
trouble.
4. When cleaning, repairing or inspecting, make
certain all moving parts have stopped. Disconnect
the spark plug wire, and keep the wire away from
the plug to prevent accidental starting.
5. Handle gasoline with care. It is highly flammable.
A. Use approved gasoline container.
B. Never remove cap or add gasoline to a running
or hot engine or fill fuel tank indoors. Wipe
up spilled gasoline.
C. Don't run engine in an enclosed area. Ex¬
haust gases contain carbon monoxide. This
odorless gas can be deadly when inhaled.
6. Stand behind the ram when operating. See draw¬
ings.
7. Be careful not to touch the muffler after the
engine has been running. It is HOT.
8. Never try to split two logs on top of each other.
One may fly out and injure you.
9. When loading the log splitter, place your hands on
the sides of the log, not at the ends.
10. For logs that are not cut square, the longest
portion of the log should be rotated down and
the most square end placed against the ram.
3

I
11. Never attempt to split wood across the jrain.
Some types of wood may burst or fly ojt of
your splitter and result in injury to you or a
bystander.
12. Never leave your log splitter unattended wilh the
engine running. Shut off the engine if yoj are
leaving your splitter, even for a short period of
time. Someone could accidentally activat; the
ram and be injured.
13. Only use your hand to operate the ram or cc ntrol
lever. Never use your foot or a rope or any ather
extension device. This could result in your i labil¬
ity to stop your splitter quickly enougf and
cause an injury.
14. Only operate your splitter on the level ground and
not on the side of a hill. It could tip, or railing
logs or poor footing could cause an acc dent.
This also prevents the spillage of gas from the
tank.
MAINTENANCE and STORAGE
1. Don't operate your splitter in poor mechanical
condition or when in need of repair.
2. Keep all nuts, bolts, screws, hose clamp; and
hydraulic fittings tight to be sure equipmant is
in safe working condition.
3. Replace all damaged or worn parts such «s hy¬
draulic hoses and fittings immediately with manu¬
facturer approved replacement parts.
4. Never store the equipment with gasoline in the
tank inside of a building where fumes may reach
an open flame or spark. Allow the engine to cool
before storing in any enclosure. _
5. To reduce fire hazard keep engine free of grai
leaves, wood chips, excessive grease and oil.
6. The hydraulic system of your log splitter re¬
quires the careful inspection along with the
mechanical parts. Be sure to replace frayed,
kinked, cracked or otherwise damaged hydraulic
components.
7. Fluid escaping from a very small hole can almost
be invisible. Do not check for leaks with your
hand. Escaping fluid under pressure can have
sufficient force to penetrate skin, causing serious
personal injury. Leaks can be located by passing
a piece of cardboard or wood over the suspected
leak and looking for discoloration.
8. 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.
9. Don't remove the cap from the hydraulic tank or
reservoir while your log splitter is running. Hot
oil under pressure could cause injury.
10. Never store outside without a waterproof cover -
Rain will cause rust on the inside of the cylindei
A CAUTION
THIS UNIT SHOULD NOT BE TOWED ON ANY
STREET, HIGHWAY OR PUBLIC ROAD. ANY
LICENSING NEEDED TO COMPLY WITH THE
EXISTING FEDERAL, LOCAL OR STATE VEH¬
ICLE REQUIREMENTS IS THE SOLE RESPONSI¬
BILITY OF THE PURCHASER.
4

TOOLS REQUIRED:
ASSEMBLY INSTRUCTIONS
(1) Raw Hide or Plastic Hammer
(1) 1-1/8" Wrench or Adjustable Wrench
^1) 3/4" Wrench
THER MATERIALS NEEDED:
One gallon of regular grade gasoline (for engine)
1-1/2 pints of SAE 30 or 10W-30 oil (for engine)
Approximately 2-1/2 gallons of Dexron II auto¬
matic transmission fluid (may be obtained at your
local service station or auto parts store.)
Funnel
CONTENTS OF HARDWARE PACK (See Figure 1):
A (2)
Spacers 1-1/2" Long
B (2) Tapered Roller Bearings
C
(2)
Castle Nuts 3/4-16 Thread
D
(2)
Cotter Pins
E
(2)
Hub Caps
F
(5)
Hex Bolts 3/8-24 x 1" Long
G
0)
Lock Washers 3/8" I.D.
H (10) Hex Nuts 3/8-24 Thread
1
(1)
Hex Bolt 1/4-20 x 1-3/4" Long
J
(1)
Hex Lock Nut 1/4-20 Thread
K
(1)
Hex Lock Nut 5/16-18 Thread
L
(1)
Shoulder Bolt
M
(1)
Rubber Washer
N
(1)
Hex Nut 3/8-16 Thread
0 (3)
Hex Bolts 3/8-16 x 3/4" Long
P
(2)
Shoulder Bolts
Q (2) Lock Washers 5/16" I.D.
R
(2)
Hex Nuts 5/16-18 Thread
S
(1)
Automotive Grease
T
(1)
Hex Bolt 1/4-28 x 1" Long
U
(1)
Hex Bolt 3/8-24 x 1-3/4" Long
V
(1)
Hex Nut 1/4-28 Thread
w
(1)
Hex Lock Nut 1/4-28 Thread
X (3)
Flat Washers (Special)
Y
(1)
Spring
z
(2)
Pivot Brackets
LOOSE PARTS IN CARTON:
FIGURE 1
(1) Axle Assembly
(2) Wheels
(2) Tow Hitch Brackets
(1) Tow Hitch Assembly
(1) Pivot Stand
(1) Hitch Chain
(1) Engagement Rod Assembly
(1) Engagement Handle
Remove log splitter and loose parts from carton. Make
certain all parts and literature have been removed
from the carton before the carton is discarded.
INSTALLATION OF WHEELS
1. Place the axle assembly in position inside the
the engine frame assembly as shown in figure 2.
Secure with hex bolts (F), lock washers (G) and
hex nuts (H).
FIGURE 2
5

I
HUBCAP
TAPERED
BEARING
(TAPER TO
INSIDE)
SPACER
TAPERED (A)
ROLLER
BEARING (B)
HUB
CAP (E)
COTTER
PIN (D)
HEX CASTLE
NUT (C)
2.
3.
4.
Pack the tapered roller bearings (B) with auto¬
motive grease provided.
Do not put any grease in the hub caps.
Place one spacer (A) on the axle, then one wheel
and a tapered roller bearing (B). See figure 3.
Thread hex castle nut (C) on axle. Tighten castle
nut until snug, then back off approximately 1/3
turn or until one of the slots on the castle nut
lines up with hole in axle. Secure castle nut to
axle with cotter pin (D). See figure 3.
Make certain wheel bearings were
packed with grease.
FIGURE 3
3-1/2" LO MG
FIGURE 4
5. Place hub cap (E) in position on wheel and tap
on with a plastic hammer.
6. Repeat steps 3 through 6 for the second wheel.
ASSEMBLY OF TOW HITCH AND STAND
The wedge is already assembled to the log splitter,
and is held in place with four 3-1/2" long hex bolts,
lock washers and hex nuts. The top two bolts and-,
nuts are tightened securely. The bottom two bolts a'
nuts have been assembled loosely.
1. Remove the two bottom bolts, lock washers and
- hex nuts from the beam and wedge. See figure 4.
2. Place one tow hitch bracket on each side of the
beam, lining up the large holes in the brackets
with the bottom holes in the beam. Secure the
tow hitch brackets with one hex bolt, lock washer
and hex nut just removed.
3. Place one pivot bracket (Z) on each side of the
two hitch brackets, lining up the holes in the
LOCK
hitch bracket with the holes toward the end of the
beam. The pivot brackets must be assembled with
the bend to the outside as shown in figure 4.
Secure with the other hex bolt, lock washer and
hex nut removed in step 1.
Place the tow hitch assembly in position on the
tow hitch brackets. Secure the left side of tow
hitch assembly with two hex bolts (0), lock
washers (G) and hex nuts (H). See figure 5.
Secure the right hand side of tow hitch assembly
with hex bolt (0), lock washer (G) and hex nut
(H) in the front hole only.
Thread one hex nut {H) onto hex bolt (U). Secu
rear hole in tow hitch assembly with this bolt,
lock washer (G) and another hex nut (H).
FIGURE 5
NOTE: Spring (Y) will be attached to this bolt in step
9.
6

SHOULDER
BOLT (P)
EXTENSION
SPRING (Y)
HEX
BOLT (T)
FIGURE 6
HEX
NUT (V)
HEX
NUT (R)
LOCK
WASHER (Q)
PIVOT
STAND
HEX
LOCK NUT
(W)
Thread hex nut (V) onto hex bolt (T). Secure tc
pivot stand with hex lock nut (W) as shown in
figure 6.
Assemble the pivot stand to the pivot brackets
with two shoulder bolts (P), lock washers (Q)
and hex nuts (R).
Attach extension spring (Y) to long hex bolts on
tow hitch and pivot stand. See figure 6.
10. Find the center link of the tow hitch chain.
Place two special flat washers (X) on hex bolt (F),
then the center link on chain and another flat
washer (X). Insert bolt down through the hole in
the tow hitch assembly which is nearest the wedge.
Secure with lock washer (G) and hex nut (H).
See figure 7.
ENGAGEMENT
ASSEMBLY OF ENGAGEMENT ROD AND HANDLE
1. Attach the engagement rod assembly to the
control valve with hex bolt (I) and hex lock nut
(J) as shown in figure 8.
2. Place the flattened end of the engagement handle
down through the slotted bracket beside the beam.
Insert the end of the ferrule on the engagement
rod into the second hole from the end of the
engagement handle. See figure 8.
3. Place shoulder bolt (L) through bottom hole in
engagement handle. Place rubber washer (M) on
shoulder bolt. Secure to bracket with lock washer
(G) and hex nut (N).
FIGURE 8
7

4. S ecure ferrule on engagement rod to engagement
handle with hex lock nut (K). See figure 9.
FIGURE 9
ENGAGER/!! NT
5. Place the engagement handle in reverse position,
locked in the notch in the slotted bracket. See
figure 10.
6. Adjust the engagement rod by tightening the hex
nut on the end of the rod until the plunger on tfh
pump is pushed all the way in when the engagement
handle is locked in the reverse position. Insert a
screwdriver into the slot in the plunger to keep
the rod from turning as the hex nut is tightened.
See figure 10.
FIGURE 10
OPERATION
BEFORE STARTING
1. Fill reservoir tank on log splitter with approx¬
imately 2-1/2 to 3 gallons of Dexron II automatic
transmission fluid as follows. Check oil level befc re
each use.
A. Place log splitter in the operating position w th
the beam level, using the stand provided.
B. Remove the oil check plug.from the back of
the log splitter. See figure 11. If oil starts to
come out of the hole, oil level is correct. I' it
does not, remove the cap from the breatier
tube and add oil until oil starts out of ihe
check hole.
C. Replace oil check plug. Replace cap on the
breather tube.
FUNNEL
FIGURE 11
8

NOTE
DO NOT operate log splitter without
proper amount of oil in reservoir tank
(beam).
2. F i l l sump with oil as instructed in the separate
engine manual packed with your unit.
3. F i l l fuel tank, using clean, fresh, regular grade
automotive gasoline. Fill tank completely.
NOTE
Refer to engine manual packed with
log splitter for complete instructions
for the care and maintenance of en¬
gine. READ DIRECTIONS CARE¬
FULLY.
TO START ENGINE
1. P l a ce throttle control lever in FAST or CHOKE
position. See figure 12.
2. P l ace choke control in CHOKE position (if unit
is so equipped).
A warm engine may not require
choking.
FIGURE 12A - 5 H.P. Tecumseh engine shown
3. Grasp starter handle, place one foot on wheel and
pull starter handle with a quick, full arm stroke.
Return rope slowly to the engine.
4. After engine starts, move choke control gradually
to OFF position (if unit is so equipped). Move
throttle control to desired engine speed.
TO STOP ENGINE
1. Move throttle control lever to STOP position.
2. Disconnect spark plug wire from spark plug to
prevent accidental starting while equipment is
unattended.
USING YOUR LOG SPLITTER
WARNING
This unit should not be towed on any
street, highway or public road. Any
licensing needed to comply with the
existing federal, local or state vehicle
requirements is the sole responsibility
of the purchaser. Make certain the
stand is folded up against the beam
when transporting.
Your log splitter is designed for safe, efficient
operation. BE CAREFUL TO KEEP HANDS AND
FEET AWAY FROM MOVING PARTS.
Engagement handle has three positions: (See figure 13)
Forward - ram moves toward wedge.
Neutral - ram stops in place.
Reverse - ram returns.
ENGAGEMENT HANDLE ENGAGEMENT HANDLE
ENGAGEMENT HANDLE
LOCKED IN REVERSE
POSITION.
FIGURE 13
9
Maximum length that can be split is 26".

I
TO OPERATE LOG SPLITTER:
1. Set throttle at maximum speed.
2. Place log on beam and hold in place with right
hand. See figure 14.
3. Slowly move engagement handle forward until
ram rests against log. Release engagement h, indie
(Neutral).
4. Remove your hand from the log and step b< hind
the ram. See figure 15.
5. Move engagement handle forward until log is split.
6. Move the engagement handle to the rear to roturn
ram.
The ram should take approximately 12 seconds to
make a complete cycle. This speed may vary de¬
pending on throttle setting and temperature of oi .
NOTE
If you lock the engagement handle in
the reverse slot, the ram will return until
it hits the engagement bracket, which will
throw the engagement handle into neutral
automatically.
Ac WARNING*}
Never attempt to cut a log in half with the
log splitter. See figure 16.
Never stand next to the ram when
operating. Always stand behind the ram.
See figure 17.
FIGURE 16
MAINTENANCE
a f WA*RN*NG*J
Always stop engine and disconnect spark
plug wire before performing any mainte¬
nance or adjustments.
ENGINE OIL
Change oil first two (2) hours of operation. Check
oil level every five (5) operating hours or each tire¬
equipment is used.
Change oil every twenty-five (25) operating hours or
sooner if equipment is operated in extremely dusty
or dirty conditions.
Refer to engine manual for quantity and type of oil.
10

LOG SPLITTER RESERVOIR OIL
Check oil in log splitter reservoir before every use.
Refer to "Before Starting" under OPERATION
section.
hange the oil in the reservoir every 100 hours of
operation. Remove the six hex bolts, lock washers
and hex nuts which hold the end plate to the beam.
Remove the plate and drain the oil. Be prepared to
catch oil in a suitable container.
NOTE
Drain the oil and flush the reservoir
tank assembly and hoses each time
repair work is performed on the tank,
hydraulic pump or valve. Contaminants
in the oil will damage the hydraulic
components.
HEX NUTS
CARBURETOR ADJUSTMENTS
▲
J WARNING (
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.
Refer to engine manual packed with your unit for
carburetor adjustment information.
TIRE PRESSURE
Check sidewall of tire for manufacturer's max¬
imum tire pressure. If this information does not
appear on your tire, maximum tire pressure under
any circumstances is 30 p.s.i. Equal tire pressure
should be maintained on all tires.
INSTALLATION OF TIRE TO RIM
Ac WARNING '{
The following procedure must be
followed when removing or install¬
ing a tire to the rim.
1. Be sure rim is clean and rust free.
2. Lubricate both the tire and rim generously.
3. Never inflate to over 30 p.s.i. to seat beads.
Excessive inflation pressure when seating beads
may cause tire/rim assembly to burst with force
sufficient to cause serious injury.
OFF-SEASON STORAGE
FIGURE 18
When the oil is drained from the reservoir, clean the
strainer tube assembly as shown.
1. Remove the hose clamp at the inlet hose (bottom
hose). See figure 18.
2. Pull the inlet hose off the fitting at the beam.
Using an adjustable wrench, remove the fitting
from the beam.
3. Reach inside the end of the beam and pull out the
strainer tube assembly.
4. Clean the strainer tube assembly and reassemble in
reverse order.
Reassemble the end plate. Refill oil reservoir with
approximately 2-1/2 to 3 gallons of Dexron II
automatic tarnsmission fluid as instructed in "Before
Starting" under OPERATION section.
'“"OSE CLAMPS
^neck the hose clamps on the bottom of the pump
for proper tightness before each use.
Hose clamps on the return hose should be checked
once a season.
If the machine is to be inoperative for a period
longer than 30 days, prepare for storage as follows.
1. Clean the engine and the entire unit thoroughly.
2. Wipe the entire machine with an oiled rag to
protect the surfaces.
3. Refer to the engine manual for correct engine
storage instructions. The engine must be
completely drained of fuel to prevent gum
deposits from forming on essential carburetor
parts, fuel lines and fuel tanks.
4. Store unit in a clean, dry area.
NOTE
When storing any type of power
equipment in an unventilated or
metal storage shed, care should be
taken to rust proof the equipment.
Using a light oil or silicone, coat the
equipment, especially all moving parts.
11

I
Models 642 and 645
IF YOU WRITE TO US ABOUT THIS ARTICLE
OR IF YOU ORDER REPLACEMENT PARTS AL¬
WAYS MENTION THIS MODEL S SERIAL NO
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 authorized engine service outlet.
Check the "Yellow Pages" of your telephone
book under " Engines — Gasoline".
Find It Fast
In Tl e I
Yellow I’agesj
NOTE
This instruction manual covers various models and all
specifications shown do not necessarily apply to your
model. Specifications subject to change without notice
or obligation.
*The hydraulic pump is one of two t\ pes. As complete units, the two pumps are interchangeable
(refer to parts list for part number). If it is necessary to determine the specific type of pump
on your unit, refer to the illustrations below.
12

Models 642 and 645
PARTS LIST FOR MODELS 642 AND 645 LOG SPLITTERS
PART COLOR
NO. CODE
DESCRIPTION
710-0118
Hex Bolt 5/16-18 x .75"
Lg.*
710-0168
Hex Bolt 3/8-16 x .60 Lg.*
712-0267
Hex Nut 5/16-18 Thd.*
717-0407
Control Valve 400
726-0132
Hose Clamp 5/8"
727-0297
High Pressure Hose Ass'y.
.38" I.D.
727-0299
Return Hose - Valve to Tank
3/4" I.D.
736-0119
L.-Wash. 5/16" I.D.*
736-0169
L.-Wash. 3/8" I.D.*
737-0153
Return Elbow
737-0171
90° Solid Male Adapter
737-0192
90° Solid Male Adapter
781-0035
Valve Mtg. Plate
13295
Coupling Support Brkt.
Ass'y.
14806
Coupling Shield
710-0117
Hex Bolt 5/16-24 x 1.00"
Lg.*
710-0157
Hex Bolt 5/16-24 x .75
Lg.*
710-0653
Hex Wash. Hd. Tap Scr.
1/4-20 x .38" Lg.
712-0123
Hex Nut 5/16-24 Thd.*
714-0172
Sq. Key 1/4" x 1/4" x 2.25
Lg.
717-0460
Pump with Woodruff Key
(642)
NEW REF. PART COLOR
PART NO. NO. CODE
44 13115
45 712-0214
46 720-0157
47 732-0324
48 736-0206
49 747-0484
717-0461
735- 0205
710-0419
717-0479
717-0498
726- 0132
727- 0298
736- 0119
737- 0192
710-0920
712- 0203
717-0818
717-0817
736- 0364
737- 0194
719-0269
719-0268
738- 0601
15850
713- 0338
727-0289
781-0020
781-0037
Pump with Woodruff Key (645)
Spider L-0-90
Set Scr. 1/4-20 x .25" Cup
Coupling Half 1.00" I.D.
Coupling Half .50" I.D.
Hose Clamp 5/8"
Suction Hose 1.0" Dia. N
L.-Wash. 5/16" I.D.*
90° Solid Male Adapter N
Hex Bolt 3/4" x 4.0" Lg.
Hex Nut 3/4" Thd.*
Hydraulic Cylinder 3-1/2"
Dia.. (642)
Hydraulic Cylinder 4"
Dia. (645)
L.-Wash. 3/4" I.D.*
High Pressure 90° Elbow
45° Male Adapter 3/4-16 MJ-
3/8-18 NP N
Pusher Plate (642) N
Pusher Plate (645) N
Shoulder Bolt .62" Dia. x
4.75" Lg. (1/2-13 Thd.) N
Flip Stand Bracket
Chain-Tow Hitch
Tow Hitch Ass'y. Comp. N
Stand Pivot Bracket N
Tow Hitch Brk't. 2 x 3/16 x
10.25" Lg.
50 749-0622
51 710-0106
52 710-0152
53 710-0180
54 710-0299
55 710-0539
.56 712-0107
57 712-0117
58 712-0138
59 712-0158
60 712-0241
61 712-0267
62 712-0299
63 712-0798
64 714-0162
65 732-0429
66 734-0873
67 735-0144
68 736-0119
69 736-0169
70 736-0262
71 738-0143
72 738-0296
73 750-0442
74 734-1016
75 734-0255
76 734-0872
77 734-1017
78 741-0107
79 781-0018
80 710-0117
81 710-0298
DESCRIPTION
Ferrule Ass'y.
Hex Cent. L.-Nut 3/8-24
Thd.
Grip-Black Vinyl
Compression Spring
Special Washer .378 x 1.00"
x .125 Thd.*
Engagement Rod 3/8" Dia. x
9.0" Lg.
Engagement Handle
Hex Bolt 1/4-20 x 1.75"
Lg.*
Hex Bolt 3/8-24 x 1.00"
Lg.*
Hex Bolt 3/8-24 x .75" Lg.*
Hex Bolt 1/4-28 x 1.00"
Lg.*
Hex Bolt 3/8-24 x 1.75" Lg.
_ (Grade 5)
Hex Patch L.-Nut 1/4-20
Lg.*
Hex Cent. L.-Nut 1/4-28
Thd.
Hex Nut 1/4-28 Thd.
Hex Cent L.-Nut 5/16-18
Thd.
Hex Nut 3/8-24 Thd.*
Hex Nut 5/16-19 Thd.*
Hex Castle Nut 3/4-16
Thd.
Hex Nut 3/8-16 Thd.*
Cotter Pin 5/32" Dia. x 1.25"
Lg-* „ I
Extension Spring .50 O.D. x
3.97." Lg.
Hub Cap
Rubber Washer
L.-Wash. 5/16" I.D.*
L.-Wash. 3/8" I.D.*
Fl.-Wash. .375" I.D. x .870"
O.D. x .090
Shoulder Bolt .498" Dia. x
x .340" Lg.
Shoulder Bolt .437" Dia. x
.268" Lg.
Spacer .75" I.D. x 1.12" O.D.
x 1.56" Lg.
Wheel Ass'y. Comp. 16.0 x
4.0"
Air Valve-Tubeless
Tire Only 16.0x4.0 -2 Ply
Wheel Rim Ass'y Only
Roller Rearing 3/4" I.D.
Axle Ass'y. .75" Dia. x
35.25" Lg.
Hex Bolt 5/16-24 x 1.00
Lg.*
Hex Bolt 5/8-18 x 3.50"
Lg.*
13

I
PARTS LIST FOR MODELS 642 AND 645 LOG SPLITTERS (Continued)
REF.
NO.
PART
NO.
COLOR
CODE
DESCRIPTION
NEW
PART
REF.
NO.
PART
NO.
COLOR
CODE
DESCRIPTION
B
82
710-0409
Hex Bolt 5/16-24 x 1.75 94
738-0140
Shoulder Bolt .437" Dia. x
■ m
Lg.*
.180" Lg.
83
710-0442
Hex Bolt 5/16-18 x 1.50'
95
745-0174
Oil Fill Cap
Lg.*
96 781-0021
Strainer Tube Ass'y.
N
84
712-0123
Hex Nut 5/16-24 Thd.*
97
781-0023
End Plate
N
85
712-0267
Hex Nut 5/16-18 Thd.*
98 781-0024
Engagement Brk't. 1.39 x
86 712-0337
Hex Nut 5/1-18 Thd.*
11.75" Lg.
87
712-0338
Hex Nut 11/16-12 Thd 99
781-0025
Complete Oil Tank Ass'y-
88
721-0203
Gasket 2.62 x 5.12
100
781-0033
Engine Frame Ass'y.
89
732-0352
Extension Spring .50" O D.
101
781-0036
Filler Tube Ass'y.
N
x 4.25" Lg.
102
721-0204
"0"-Ring 92" I.D. x 1.16"
90
736-0119
L.-Wash. 5/16" I.D.*
O.D. x .116 Dia.
N
91
736-0158
L.-Wash. 5/8" I.D.*
103 781-0038
Wedge Ass'y.
N
92
736-0275
FI.-Wash. 34" I.D. x .68"
104
—
5 H.P. Engine (642)
O.D. x .062 Thk.
—
8 H.P. Engine (645)
93 737-0191
Adapter 1.0" Tube 11/16-12
721-0168
Bearing Seal
O -Ring
EES
710-0604
Hex Hd. Tap Scr. 5/16"
■ I
mm
721-0205
Gasket
Jla.
*For faster service order standard nuts, bolts, and washer; locally. If these items cannot be obtained locally, order by part number and
size as shown on parts list.
Models 642 and 645
3-1/2" DIA. CYLINDER 4 " Q1A. CYLINDER
PARTS LIST FOR MODEL 642 PARTS LIST FOR MODEL 645
REF.
NO.
PART NO.
DESCRIPTION
NEW
PARI
REF.
NO.
PART NO.
DESCRIPTION
NEW 1
PART
1
717-0818
Cylinder Ass'y. Comp.
N 1
717-0817
Cylinder Ass'y. Comp
N
2
753-0272
3-1/2" Cyl. Kit "0"-Ring Sut
753-0273
4" Cyl. Kit "0"-Ring Set
14

TROUBLE SHOOTING CHART
SYMPTOM
POSSIBLE CAUSE (S)
SOLUTION
Engine fails to start
A. Check fuel tank for gas.
B. Spark plug lead wire
disconnected.
C. Faulty spark plug.
A. Fill tank if empty.
B. Connect lead wire.
C. Spark should jump gap between
control electrode and side electrode.
If spark does not jump, replace the
spark plug.
2. Hard starting or loss of
power
A. Spark plug wire loose.
B. Dirty air cleaner.
A. Connect and tighten spark plug wire.
B. Clean air cleaner as described in
engine manual.
3. Engine overheats
A. Carburetor not adjusted
properly.
B. Air flow restricted.
C. Engine oil level low.
A. Adjust carburetor. See engine manual.
B. Remove blower housing and clean as
described in the engine manual.
C. Fill crankcase with the proper oil.
4. Will not split logs
A. Reservoir oil level low.
B. Pump setting incorrect.
A. Check and fill oil reservoir tank as
instructed in Operation Section.
B. Adjust pump setting to 3,000 p.s.i.*
5. Leaking cylinder
A. Broken seals.
B. Scored cylinder.
A. Replace seals.*
B. Replace cylinder.*
NOTE: For repairs beyond minor adjustments, please contact your local service dealer.
*Should be performed by an authorized service dealer only.
15

I
MTD PRODUCTS INC
YaRD- MaN COMPANY
P.O. BOX 3690C • CLEVELAND OHIO 44136