MTD LT-5 Service Manual
For Discount White Outdoor Parts Call 606-678-9623 or 606-561-4983
Service Manual
LT-5 Lawn Tractor
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 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 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 2005 MTD Products Inc. All Rights Reserved
MTD Products Inc - Product Training and Education Department
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FORM NUMBER - 769-01415
2/2005
For Discount White Outdoor Parts Call 606-678-9623 or 606-561-4983
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TABLE OF CONTENTS
General Information ....................................................................................................................1
Operator Controlled Reverse (OCR) ..........................................................................................1
Numbering System .....................................................................................................................2
Deck Removal ............................................................................................................................ 2
Blade Drive Belt Removal ..........................................................................................................3
Deck Idler Bracket Removal .......................................................................................................3
Spindle Removal ........................................................................................................................4
Fender Removal .........................................................................................................................5
Upper Drive Belt Removal ..........................................................................................................6
Lower Drive Belt Removal. .........................................................................................................8
Variable Speed Pulley Removal .................................................................................................8
Variable Speed Idler Bracket Removal ......................................................................................9
Transmission Removal – 618-04072 ........................................................................................10
Deck Lift Assembly ..................................................................................................................11
Removal of the Steering Shaft and Sector Gear ......................................................................12
Pedal Support Bracket Removal ..............................................................................................13
Speed Control Latch Removal .................................................................................................13
7-Speed Shift Lever Removal ..................................................................................................14
Parking Brake and Shift Control Adjustments ..........................................................................15
Toe-In Adjustment ....................................................................................................................15
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Servicing the LT-5 Lawn Tractor
LT-5 LAWN TRACTOR (TROY-BILT MODEL
SHOWN)
GENERAL INFORMATION
Model used in the Service Manual - 13AN779G766
17.5 hp Briggs & Stratton engine - 42” cutting deck
• RMC - “Reverse Mowing Control” technology
“A means shall be provided that prevents reverse drive
operation at a ground speed greater than 1 ft./sec.with
powered blade(s).
An override capability may be provided to permit
reverse drive with powered blades temporarily. If an
override capability is provided, it shall automatically
reset when one or more of the following actions occurs:
The blade(s) is (are) re-engaged or (2) the engine is
restarted or (3) the directional control is moved from
reverse.”
How It Works:
• Operator turns the key from the run position #3
to position #2. See Figure 1.
#2
#1
#3
#4
• Greaseable Spindles.
• Square Shoulder Tires.
• Wider tires 15X6 and 20X8 .
• 18” Turning Radius
• Improved Independent Controls.
• Operational Controls on Fender and Dash.
• Cup Holder.
• Fully Welded Frame.
• 38” and 42” decks with Fast Attach.
• All decks are “Wash Kit” ready
• Enhanced Hour Meter Package
RMC - “REVERSE MOWING CONTROL”
The operator can choose to over-ride our “No Cut In
Reverse” safety system.
The revised ANSI Standard B71.1 taking effect September 1, 2004 states:
Figure 1
• Presses RMC button.
• Light indicator gives visual confirmation to the
operator.
Operator may mow in forward or reverse until:
• Leaves the tractor seat.
• Turns the key back to right (position #3).
• Turns the engine off (position #1).
Incorporated on 2005 LT-5 and RT99.
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NUMBERING SYSTEM
The LT-5 will follow the same model number configuration as the BFR which was the 600 series (frame size)
but now in the fifth position there will be a ( 7 ) to signify
transition to the new platform.
Example: 13AD789G790
1. DECK REMOVAL
1.1. Place the unit on a firm and level surface.
1.2. Remove the key from the ignition.
1.3. Lower the deck to its lowest cutting position.
1.4. Using needle nose pliers, remove the hairpin
clips securing the deck hanger brackets to the
deck. Release the hanger links from the deck.
See Figure 2.
Deck Hanger Bracket
1.5. Using a 1/2” socket, remove the hex head cap
screw securing the belt keeper to the frame.
Remove the belt keeper. See Figure 3.
Hex Cap Screw
Belt Keeper
Figure 3
NOTE: Note the location of the belt keeper dur-
ing removal. There are two holes in the side
frame. Use the forward hole during assembly.
Figure 2
Hairpin Clip
1.6. Slide the deck forward and remove the deck belt
from around the engine pulley. See Figure 4.
Front Stabilizer
Figure 4
1.7. Lift the front stabilizer from the front stabilizer
bracket.
1.8. Remove front stabilizer adjustment rod by sliding
rod forward untill the flat area is in line with stabilizer bracket notch. Turn the rod 90 degrees and
remove it from the tractor.
Engine Pulley
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1.9. Raise the deck lift lever to its highest cutting
position.
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1.10. Using needle nose pliers, remove the hairpin clip
securing the deck engagement cable to the deck
flange. See Figure 5.
Deck Engagement Cable
Deck Bracket
Figure 5
1.11. Slip the oval plastic retainer ring from the connector. Pull the connector rearward, lining the
grooves in the connector with the deck flange
and slide it up and out of the flange. See Figure
6.
2. BLADE DRIVE BELT REMOVAL
NOTE: The 38” deck has a single pulley on the
idler. The 42” deck has two pulleys on the idler.
Disassembly procedures are similar.
2.1. Remove the cutting deck from the unit.
2.2. Using a ½” socket, remove the three screws
securing the belt cover to the deck. Repeat for
the other belt cover. See Figure 7.
Belt Covers
Figure 7
Deck Bracket
Oval Retainer
Figure 6
1.12. Remove the tension spring from the deck idler
bracket.
NOTE: Depending on which deck is installed on
the unit, it may be necessary to remove the spindle brake connecting rod between the two spindles in order to remove the deck engagement
spring.
1.13. Slide the deck out from under the unit.
NOTE: The belt covers are interchangeable.
2.3. Using a 9/16” socket and an open-end wrench,
loosen but do not remove the nuts securing both
idler pulleys to the idler bracket. See Figure 8.
Idler Pulleys
Belt Guides
Idler Bracket
Figure 8
2.4. Remove the belt from around the idler pulleys
and spindles.
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3. DECK IDLER BRACKET REMOVAL
NOTE: The 38” deck has a single pulley on the
idler. The 42” deck has two pulleys on the idler.
Disassembly procedures are similar.
3.1. Remove the deck from the unit.
3.2. Remove the deck drive belt.
3.3. Remove the deck idler bracket spring. See Figure 9.
Deck Idler Bracket Spring
Figure 9
3.4. Remove the cotter pin holding the brake rod to
the idler bracket and remove the brake rod connected to the idler bracket. See Figure 10.
3.5. Using a 9/16” socket and a 9/16” wrench,
remove the bolt and nut securing the idler
bracket to the frame. There is a shoulder spacer
under the idler bracket. Remove the idler
bracket. Inspect the idler bracket for wear or
damage. Inspect the brake puck at the end of
the idler bracket for wear or damage. The brake
puck is riveted to the idler bracket. See Figure
11.
Shoulder Spacer
Lower Spacer
Figure 11
NOTE: The 38” and 42” deck share the same
idler bracket. They each use unique mounting
holes. Correct holes are marked on the bracket.
This is also true for the tension springs. The hole
in the center of the bracket has a step washer in
it. See Figure 12.
Figure 10
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Cotter Pin
Brake Rod
Shoulder Spacer
Figure 12
3.6. Using two 9/16” wrenches remove the idler pulleys.
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3.7. Inspect the pulleys and pulley bearings for damage and wear. Replace as needed.
NOTE: When reassembling be sure to install the
spacer under the pulley and the thinner flat
washer on top.
NOTE: Lubricate the idler bracket with a small
amount of lithium grease during assembly. Perform this lubrication on a yearly basis.
4. RIGHT SPINDLE BRAKE
4.1. Remove the brake spring attached from the deck
frame to the brake assembly at the right spindle.
See Figure 13.
Brake Assembly
4.2. Using a ½ inch socket and a ½” wrench remove
the brake assembly bracket. Inspect the brake
puck for wear or damage. The brake puck is riveted to the bracket and must be replaced as an
assembly. See Figure 14.
Riveted Brake Puck
Figure 14
Brake Spring
Figure 13
NOTE: Although similar, this spring is different
from the spring on the Idler arm. This spring may
be painted yellow.
5. SPINDLE REMOVAL
5.1. Remove the deck from the unit. See DECK
REMOVAL Section.
5.2. Remove the blade drive belt. See BLADE
DRIVE BELT REMOVAL Section.
5.3. Remove the deck Idler bracket and spindle
brake bracket. See DECK IDLER BRACKET
REMOVAL Section.
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