Professional Shop ManualProfessional Shop Manual
22” Trimmer Mower
NOTE: These materials are for use by trained technicians who are experienced in the service and repair of outd oor 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 inexperienced 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 Operators 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 accura te as possible at the time of publication. However, du e 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 2013 MTD Products Inc. All Rights Reserved
Table of Contents
About the text format............................................................................................. 1
Fasteners ..............................................................................................................3
Assembly instructions ...........................................................................................3
The 22” Trimmer Mower .......................................................................................3
Understanding model and serial numbers.............................................................4
Trimmer Line .........................................................................................................5
Skid Assembly ......................................................................................................6
Spindle ..................................................................................................................7
Belt Replacement ................................................................................................10
Wheels and Axle .................................................................................................12
Debris Screen .....................................................................................................13
I
II
22” Trimmer Mower
! WARNING! WARNING
! DANGER! DANGER
! CAUTION! CAUTION
22” TRIMMER MOWER
Professional Service Manual Intent: This manual is intended to provide service dealers with repair and overhaul
procedures for the Cub Cadet trimmer mower.
Disclaimer: The information contained in this manual is co rrect 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
Certain flags and key words are used to indicate the nature of the text that accompanies them. They are as follows:
CAUTION: Indicates a potentially hazardous situation that, if not avoided, may result
in minor or moderate injury. It may also be used to alert against unsafe practices.
WARNING: Indicates a potentially hazardous situation that, if not avoided, could
result in death of serious injury.
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 situa
tions.
NOTE: “NOTE” is used to point-out helpful information that may not fit as a step in a procedure.
1. Numbered steps indicate specific things that should be done, and the order in which they should be done .
1a. Sub steps will be lettered and nested within steps. Two or more sub steps may be combined to describe
the actions required to complete a step.
• Bullet points: Indicate sub-steps or points of interest, without implying order or relative importance.
Disclaimer: This manual is intended for use by trained, professional technicians.
• Common sense in operation and safety is assumed.
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If the person using this manual is uncomfortable with any procedures they encounter, they should seek the help
of a qualified technician.
• In no event shall MTD be liable for poor text interpretation, or poor execution of the pr ocedure s describ ed
in the text.
1
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.
• 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 ser ious
harm.
• Clean spills and fix obviously dangerous conditions as soon as they are noticed.
• Lift and support heavy objects sa fely and securely.
• Be aware of your surroundings and potential h azards that are inhe rent to all power
equipment. All the labels in the world cannot protect a technician from an in stant of
carelessness.
! CAUTION! 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! WARNING
• Exhaust fumes from running engines contain carbon mono xide (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.
! DANGER! DANGER
22” Trimmer Mower
Figure 1
Fasteners
• The fasteners used on the equipment described in thi s manual, and the engin e that powers it are a co mbination of metric and fractional inch. 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 releasable thread locking compound such as Loctite® 242 (blue).
• Some fasteners, like cotter pins, are single-use items that are not to be reused. Other fa ste ners, such a s:
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-reference guide as well as a step-by-step procedure guide that does not require the user to hunt for information.
• 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-r eference g uide as we ll 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 pr ocedures. Th is avoid s repe ating
the same procedure two or three times in the manual.
The 22” Trimmer Mower
The 22” wheeled string trimmer was intended for clearing heavy growth from unimproved land. This model has a
engine brake feature. When the control lever is released,
the engine will stop running.
3
Understanding model and serial numbers
Figure 2
The model number of the 22” trimmer mower described in
this manual is 25A-262J710.
The break down of what the model number
follows:
• 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .indicates that this is a edger or trimmer
• . . .A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .sales revision level
• . . . . “ -” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .not used
• . . . . . . . 26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .indicates this is a trimmer mower
• . . . . . . . . . .2J . . . . . . . . . . . . . . . . . . . . . . . . . . . .engine
• . . . . . . . . . . . . 710 . . . . . . . . . . . . . . . . . . . . . . . .customer number
The serial number is 1I243P10039. The serial number
• 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . engineering level
• . I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . month of production (I = September)
• . . .24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . day of the month
• . . . . . 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .last digit of the year
• . . . . . . . P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . plant it was built in
• . . . . . . . . . . 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . assembly line number
• . . . . . . . . . . . . 0039 . . . . . . . . . . . . . . . . . . . . . . . number of unit built
means is as
reads as follows:
Additional technical and service information may also be available to our company authorized service center personnel 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
4
Trimmer Line
line diagram
Figure 3
1
2
Figure 4
22” Trimmer Mower
The trimmer line is a fixed length and can easily be
replaced following the diagram on the front of the trimmer
base assembly. See Figure 3.
1. Disconnect and ground the spark plug wire.
2. Remove the worn string from the spindle.
3. Fold the replacement trimmer line in half and insert
both ends through the loop near the edge of the spin
dle.
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4. Pull the ends of the trimmer line through the loop until
the line is securely beneath the met al tab.
See Figure
4.
5. Cross the line ends and pull each tightly to secure the
trimmer line in place.
NOTE: The line will be trimmed to final length by the blade
mounted under the deflector.
NOTE: Always use 490-040-C035 trimmer line.
5
Skid Assembly
Figure 5
skid assembly
NOTE: The skid assembly is available as service
part number: 982-0143.
To remove/replace the skid assembly:
1. Turn of the engine.
2. Disconnect the spark plug wire and ground it to the
engine block.
3. Remove and discard the three nuts and bolts that
secure the skid to the spindle assembly using a pair
of 7/16” wrenches.
4. Lower the skid off of the spindle.
5. Install the skid by following the previous steps in
reverse order.
NOTE: Do not re-use the original hardware, ne w
hardware will be included with the skid
assembly.
See Figure 5.
6
Spindle
Figure 6
spindle
trimmer line disc
wing nut
Figure 7
nuts
Figure 8
Removing the deflector.
22” Trimmer Mower
NOTE: The spindle can not be serviced, and must be
replaced as a unit if it gets damaged .
NOTE: The cutting height is adjusted by sliding the disc
that the trimmer line is attached to up or down the
spindle shaft.
• The disc is held in position by two wing nuts, that
must be loosened before making a height adjustment, and re-tightened to hold that adjustment.
• The skid assembly remains fixed, and the disc
moves in relation to the skid assembly.
• The wing nuts cannot be removed from their
studs: the threads are peened.
1. Disconnect and ground the spark plug wire.
See Figure 6.
2. Remove the nuts from the four carriage bolts that
hold the deflector to the trimmer base, using a 7/16”
wrench.
3. Rotate the deflector so that the wide part of the center hole in the deflector will fit past the spindle. See
Figure 8.
4. Remove the deflector.
See Figure 7.
7
5. Loosen the idler pulley nut and bolt with a pair of 1/
Figure 9
belt keeper
lock nut
Figure 10
idler pulley
Figure 11
extension spring
2” wrenches, until the belt keeper opens. See Figure
9.
6. Slip the belt off of the idler pulley. See Figure 10.
7. Disconnect the extension spring from the belt guide
bracket.
NOTE: The extension spring applies tension to the
8
See Figure 11.
idler pulley maintaining belt tension.
22” Trimmer Mower
Figure 12
spacer
washer
nut
shoulder spacer
extension spring
Figure 13
mounting Bolts
mounting Bolts
spindle bolt
idler assembly bolt
8. Remove the hex nut and hex bolt that hold the idler
pulley assembly to the trimmer base, using a pair of
1/2” wrenches.
NOTE: Record the mounting hardware positions as you
remove it.
9. Remove the center hex bolt securing the spindle
assembly to the trimmer base from the top, using a 1/
2” wrench.
See Figure 12.
10. Remove the remaining nuts and bolts which secure
the spindle to the trimmer base, using a pair of 1/2”
wrenches.
NOTE: Three of these bolts will also hold the belt keeper
in position.
11. Remove the belt from the spindle.
12. Remove the spindle.
13. Install the spindle by following the previous step in
reverse order.
9
Belt Replacement
Figure 14
nuts
Figure 15
belt keeper bracket
extension spring
Figure 16
belt
IMPORTANT: Allow the engine to cool if it has been
running.
1. Disconnect and ground the sp ark plug wire.
2. Drain the fuel tank.
3. Position the trimmer so the rear edge of th e tr imme r
base is resting securely on a work bench, and pivot
the handle down.
NOTE: The handle should be securely weighted
down, so the trimmer stands on end.
4. Remove the hex nuts from the carriage bolts that
secure the deflector shield to the trimmer base,
using a 7/16” wrench. See Figure 14.
5. Remove the carriage bolts and the deflector.
6. Disconnect the extension spring from the belt
keeper bracket.
7. Remove the belt keeper bracket, using a pair of 1/2”
wrenches. See Figure 15.
8. Loosen the idler pulley nut and bolt, using a pair of
1/2” wrenches, until the belt keeper opens.
9. Slip the belt off of the idler pulley.
10. Loosen the idler bracket nut and bolt using a pair of
1/2” wrenches.
11 . Grasp the idler bracket assembly and pull inward
until the belt can be removed from the spindle
assembly.
12. Slip the belt out of the spindle pulley groove. See
Figure 16.
10
22” Trimmer Mower
Figure 17
flywheel
Wrench preventing the
flywheel from turning
Figure 18
axle
13. Secure the pulley flywheel so that it will not spin
during removal of the crankshaft bolt.
14. Remove the crankshaft bolt using a 9/16” wrench.
15. Remove the left wheel.
See Figure 17.
16. Slide the axle to the right until it clears the left side of
the frame.
17. Slip the belt off of the pulley flywheel.
18. Remove the pulley flywheel.
19. Remove the belt.
20. Install the belt by following the previous steps in
reverse order.
21. Test run the trimmer mower in a safe area before
returning it to service.
See Figure 18.
11
Wheels and Axle
Figure 19
axle bolt
and
washer
Figure 20
axle stop and
hole in frame
Figure 21
spacer
wave washer
To remove the wheels and axle:
1. Remove the screw and washer that secures the
wheel, using a 7/16” wrench.
NOTE: If the axle is being removed, the left wheel
must be removed.
NOTE: There is a stop welded to the axle where it
passes through the right hand side of the
trimmer base. This stop will not allow the
axle to slide or rotate.
See Figure 19.
See Figure 20.
2. Remove the spacer and wave washer between the
left hand side wheel and the trimmer base.
ure 21.
3. Slide the axle and wheel to the right.
12
See Fig-
Debris Screen
Figure 22
debris screen
rear tab
Figure 23
starter rope
Slot
Figure 24
front tab
22” Trimmer Mower
There is a debris screen over the cooling fan. Its presence is necessary to prevent the cooling fins from getting
clogged. Customers should not operate the trimmer with
out the screen in place. See Figure 22.
To remove/replace the debris screen:
1. Press in on the rear of the screen until the rear tab
clears the engine shroud.
2. Slip the starter rope out of the slot in the debris
screen.
See Figure 23.
See Figure 22.
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3. Unhook the front tab from the engine shroud. See
Figure 24.
4. Lift the screen off of the engine.
5. Install the screen by following the previous steps in
reverse order.
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MTD Products Inc - Product Training and Education Department
FORM NUMBER - 769-09529
11/2013
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