Professional Shop Manual
2010 and Newer Log Splitter
NOTE: These materials are for use by trained technicians who are experienced in the service and repair of outdoor power
equipment of the kind described in this publication, and are not intended for use by untrained or inexperienced individuals.
These materials are intended to provide supplemental information to assist the trained technician. Untrained or inexperi-
enced individuals should seek the assistance of an experienced and trained professional. Read, understand, and follow all
instructions and use common sense when working on power equipment. This includes the contents of the product’s Oper-
ators Manual, supplied with the equipment. No liability can be accepted for any inaccuracies or omission in this publication,
although care has been taken to make it as complete and accurate as possible at the time of publication. However, due to
the variety of outdoor power equipment and continuing product changes that occur over time, updates will be made to these
instructions from time to time. Therefore, it may be necessary to obtain the latest materials before servicing or repairing a
product. The company reserves the right to make changes at any time to this publication without prior notice and without
incurring an obligation to make such changes to previously published versions. Instructions, photographs and illustrations
used in this publication are for reference use only and may not depict actual model and component parts.
© Copyright 2010 MTD Products Inc. All Rights Reserved
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
I
Chapter 1: Introduction ............................................................................................1
Professional Service Manual Intent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Assembly instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Description of the 2010 log splitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Understanding model and serial numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2: Engine And Pump ................................................................................. 5
Horizontal shaft engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Vertical shaft engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Engine coupler gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Pump removal/replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 3: Hydraulic Diagnosis ............................................................................ 11
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Understanding the hydraulic flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Log splitter test procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
What to do about failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
System drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Log Splitter Hydraulic System Work Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Chapter 4: Control Valve ....................................................................................... 31
Control valve removal/replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Control valve spring cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Control valve lever bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Chapter 5: Cylinder ................................................................................................. 37
Cylinder removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Cylinder rebuilding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Chapter 6: Wedge And Beam ................................................................................ 47
Wedge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Beam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Chapter 7: Tank And Tires .....................................................................................51
Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Wheel assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Fenders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Oil filter housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Vertical locking rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Horizontal locking rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table of Contents
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
II
Chapter 8: Maintenance ......................................................................................... 61
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Beam and wedge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Engine maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Fuel system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Servicing the fuel system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Hydraulic oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Wheel bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
Introduction
1
Professional Service Manual Intent
This Manual is intended to provide service dealers with an introduction to the mechanical aspects of the log split-
ters introduced for the 2010 model year.
• Detailed service information about the engine will be provided by the engine manufacturer, in most cases.
Disclaimer: The information contained in this manual is correct at the time of writing. Both the product and the infor-
mation about the product are subject to change without notice.
About the text format:
NOTE: is used to point out information that is relevant to the procedure, but does not fit as a step in the proce-
dure.
• Bullet points: indicate sub-steps or points.
1. Numbered steps indicate specific things that should be done, and the order in which they should be done.
1a. Substeps will be lettered and nested within steps. Two or more substeps may be combined to describe
the actions required to complete a step.
Disclaimer: This manual is intended for use by trained, professional technicians.
• Common sense in operation and safety is assumed.
• In no event shall MTD be liable for poor text interpretation or poor execution of the procedures described
in the text.
• If the person using this manual is uncomfortable with any procedures they encounter, they should seek
the help of a qualified technician or MTD Technical Support.
Safety
This Service Manual is meant to be used along with the Operator’s Manual. Read the Operator’s Manual and
familiarize yourself with the safety and operational instructions for the equipment being worked on. Keep a copy of
the Operator’s Manual for quick reference. Operator’s manuals may be viewed for free at the brand support website.
It will be necessary to have the complete model and serial number for the equipment.
Caution is used to point out potential danger to the technician, operator, bystanders, or sur-
rounding property. ! CAUTION
Warning indicates a potentially hazardous situation that, if not avoided, could result in death
or serious injury. ! WARNING ! DANGER
Danger indicates an imminently hazardous situation that, if not avoided, will result in death or
serious injury. This signal word is to be limited to the most extreme situations
CHAPTER 1: INTRODUCTION
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
2010 Log Splitters
2
• Be prepared in case of emergency:
Keep a fire extinguisher nearby
Keep a first aid kit nearby
Keep emergency contact numbers handy
• Replace any missing or damaged safety labels on shop equipment.
• Replace any missing or damaged safety labels on equipment being serviced. ! CAUTION
• Grooming and attire:
Do not wear loose fitting clothing that may become entangled in equipment.
Long hair should be secured to prevent entanglement in equipment.
Jewelry is best removed.
• Protective gear: includes, but is not limited to
Clear eye protection ................................ while working around any machinery
Protective gloves ..................................... where necessary
Armored footwear .................................... when working around any machinery
Hearing protection ................................... in noisy environments
Chemically resistant gloves ..................... when working with chemicals or solvents
Respirator ................................................ when working with chemical or solvents
Appropriate tinted eye protection............. when cutting or welding
Flame resistant headgear, jacket, chaps . when cutting or welding ! WARNING ! CAUTION
• Remember that some hazards have a cumulative effect. A single exposure may
cause little or no harm, but continual or repeated exposure may cause very serious
harm.
• Clean spills and fix obviously dangerous conditions as soon as they are noticed.
• Lift and support heavy objects safely and securely.
• Be aware of your surroundings and potential hazards that are inherent to all power
equipment. All the labels in the world cannot protect a technician from an instant of
carelessness.
• Exhaust fumes from running engines contain carbon monoxide (CO). Carbon
monoxide is a colorless odorless gas that is fatal if inhaled in sufficient quantity.
Only run engines in well ventilated areas. If running engines indoors, use an
exhaust evacuation system with adequate make-up air ventilated into the shop.
• Hydraulic fluid under high pressure can be dangerous. A high-pressure hydrau-
lic fluid leak or spray can penetrate the skin. If this happens, seek immediate
medical attention to reduce the risk of blood poisoning leading to death or limb
amputation. ! DANGER
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
Introduction
3
Fasteners
• Most of the fasteners used on these log splitters are sized in fractional inches. The engine fasteners are
metric. For this reason, wrench sizes are frequently identified in the text, and measurements are given in
U.S. and metric scales.
• If a fastener has a locking feature that has worn, replace the fastener or apply a small amount of releas-
able thread locking compound such as Loctite® 242 (blue).
• Some fasteners, like cotter pins, are single-use items that are not to be reused. Other fasteners such as
lock washers, retaining rings, and internal cotter pins (hairpin clips) may be reused if they do not show
signs of wear or damage. This manual leaves that decision to the judgement of the technician.
Assembly instructions
• Torque specifications may be noted in the part of the text that covers assembly. They may be summa-
rized in tables along with special instructions regarding locking or lubrication. Whichever method is more
appropriate will be used. In many cases, both will be used so that the manual is handy as a quick-refer-
ence guide as well as a step-by-step procedure guide that does not require the user to hunt for informa-
tion.
• Lubricant quantity and specification may be noted in the part of the text that covers maintenance, and
again in the section that covers assembly. They may also be summarized in tables along with special
instructions. Whichever method is more appropriate will be used. In many cases, the information will be
found in several places in the manual so that the manual is handy as a quick-reference guide as well as a
step-by-step procedure guide that does not require the user to hunt for information.
• The level of assembly instructions provided will be determined by the complexity of reassembly, and by
the potential for damage or unsafe conditions to arise from mistakes made in assembly.
• Some instructions may refer to other parts of the manual for subsidiary procedures. This avoids repeating
the same procedure two or three times in the manual.
Description of the 2010 log splitters
For the 2010 model year, MTD re-designed its log split-
ter line.
The re-designed models can be identified by:
2009 and
older
2010
Beam I-beam style U-channel
with a fabri-
cated top
plate
Wedge Adjustable
gibs
No gibs
Fittings NPT O-ring face
Figure 1.1
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
2010 Log Splitters
4
Understanding model and serial numbers
The model number of a the compact log splitter described
in this manual is 24AA5DMK029. This manual is likely to
carry useful information for a range of similar log splitters
that may carry a variety of MTD and private brand names.
The break down of what the model number means is as follows:
• 24 - - - - - - - - - - - - - - - - - - - - - - - - -indicates that this is a chore performer.
• - - A - - - - - - - - - - - - - - - - - - - - - - - - “A” means no hydraulic fluid included. “B” means filled at the plant.
• - - - -A5- - - - - - - - - - - - - - - - - - - - - -indicates the tank size and style
• - - - - - - D - - - - - - - - - - - - - - - - - - - -indicates the tonnage
• - - - - - - - -MK - - - - - - - - - - - - - - - - - indicates the engine
• - - - - - - - - - - - 029- - - - - - - - - - - - - -indicates the customer
The serial number is 1J056G10005. The serial number reads as follows:
• 1 - - - - - - - - - - - - - - - - - -engineering level
• - J - - - - - - - - - - - - - - - - - -month of production (J = October)
• - - - 05 - - - - - - - - - - - - - - - -day of the month
• - - - - - 6 - - - - - - - - - - - - - - -last digit of the year
• - - - - - - G - - - - - - - - - - - - - -plant it was built in
• - - - - - - - - 1 - - - - - - - - - - - - -assembly line number
• - - - - - - - - - -0005 - - - - - - - - - -number of unit built
Additional technical and service information may also be available to our company authorized service center per-
sonnel through our company corporate offices, regional parts distributors and regional service center field support
personnel. Please contact the designated support office in your area or our corporate offices directly should further
service information be needed.
MTD Products LLC
P.O. Box 368022
Cleveland, OH 44136
Telephone: (800) 800-7310
www.mtdproducts.com
Figure 1.2
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
Engine and pump
5
MTD log splitters are available with a variety of horizontal and vertical shaft engines. This manual covers proce-
dures that are the same for all engine models available. Specific engine procedures are covered in the engine’s ser-
vice manual.
Horizontal shaft engines
To remove/replace the engine:
1. Remove the three coupling support bracket nuts
using a pair of 1/2” wrenches. See Figure 2.1.
NOTE: A thin headed wrench (like a tappet wrench) is
needed to fit between the engine and the coupling
support bracket.
2. Slide the pump and the coupling support bracket off
as one assembly.
NOTE: support the pump. DO NOT let the pump hang by
the hoses.
3. Remove the spider from the engine coupling.
4. Remove the spacer shield.
5. Remove the four engine mounting screws using a 9/
16” wrench.
6. Remove the engine from the log splitter.
Figure 2.1
Nuts
coupling support bracket
Spacer shield
Thin headed
wrench
Figure 2.2
Engine mounting
screws
CHAPTER 2: ENGINE AND PUMP
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
2010 Log Splitters
6
NOTE: If the engine is not being replaced, skip to
step 10.
7. Remove the set screw in the engine coupling using
a 1/8” hex key. See Figure 2.3.
NOTE: When installing the engine coupling, apply a
small amount of releasable thread locking
compound such as Loctite® 242 (blue) to
the set screw and tighten it to a torque of 78
in lbs (9 Nm)
8. Remove the engine coupling and key.
NOTE: If the pump shows any signs of an impact,
check the coupling support bracket. If the
bracket is bent, replace the bracket and the
bolts. A bent bracket or bolts may put a side
load on the pump input shaft, damaging the
bearings.
9. Remove the front coupling support bracket using a
1/2” wrench. See Figure 2.4.
10. Install the engine by following the previous steps in
reverse order.
NOTE: The three long bolts must be in the front
coupling support bracket before it is
attached to the engine.
NOTE: Tighten the engine mounting screws to a
torque of 325 - 450 in lbs (37 - 51 Nm).
11. Adjust the engine coupler gap by following the steps
described in the engine coupler gap section of this
chapter.
12. Test run the log splitter before returning it to service.
Figure 2.3
Set screw
Figure 2.4
Front coupling support bracket
Long bolts
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
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MTD Newer Log Splitter 2010 Workshop Service Repair Manual
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Description
This is a comprehensive service repair manual for the MTD Newer Log Splitter 2010. It contains detailed illustrations, diagrams, wiring schematics, and specifications, along with step-by-step instructions. The manual is designed for both professional mechanics and DIY enthusiasts. It covers every aspect of the MTD Newer Log Splitter 2010, making it an invaluable source of repair and service information.
The manual is available in PDF format, which is fully printable, allowing you to easily reference the information in your garage or workshop. It also includes detailed substeps, notes, cautions, and warnings to guide you through each repair procedure. The manual is in English and is compatible with all versions of Windows and Mac, requiring Adobe Reader and Win for access.
The Workshop Service Repair Manual covers a wide range of systems and components, including the engine mechanical system, electrical system, emission control system, fuel system, suspension system, clutch system, manual and automatic transaxle systems, driveshaft and axle, steering system, brake system, body interior and exterior, body electrical system, and more.
Additionally, it provides detailed specifications, troubleshooting, and electrical service procedures, along with wiring diagrams for ease of use. This manual is an essential tool for diagnosing and repairing electrical system problems.
With instant access to the MTD Newer Log Splitter 2010 Workshop Service Repair Manual, you can efficiently maintain and repair your vehicle, ensuring it operates at its best.
