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Service Transmission - 21
SERVICE TRANSMISSION
1. Install traction drive belt (E) on drive sheaves (G) as shown. Ensure that
traction drive belt is positioned in front of anchor cap screw (F).
2. Insert 1/2 in. breaker bar into hole (C) and rotate idler pulley (D) forward
for additional clearance to install traction drive belt.
3. Install rear shield.
4. Install mower deck drive belt.
Checking and Adjusting Motion Control Linkages
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NOTE: Check and adjust motion control linkages with the machine
parked on a hard, level surface.
Checking Motion Control Linkages:
1. Park machine safely. (See Parking Safely in the SAFETY section.)
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2. Rotate speed control bar (A) to full forward position.
3. With engine off, move motion control levers (B) until they contact the
speed control bar (A). A slight deflection should be seen in the linkage rod
(C).
NOTE: Check machine tracking after making adjustments.
Start the engine and run until it reaches normal operating temperature.
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5. Stand on the operator’s platform and, with the park brake released,
move the motion control levers (B).
6. Observe wheel movement as motion control levers are moved back and
forth. Wheels should travel in the correct direction as the levers are
moved.
7. Move motion control levers to neutral position. If rear wheels continue to
rotate, a return to neutral (RTN) adjustment is required.
Adjusting Motion Control Return to Neutral (RTN) Linkages:
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1. Stop engine.
2. Lock park brake.
3. Lift machine with a safe lifting device centered under rear tire support
frame.
4. Start the machine with motion control levers in neutral.
5. Stand on the operator’s platform and release park brake.
6. If rear wheels rotate when motion control levers are in neutral, a neutral
adjustment is required.
7. Stop engine.
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MX20161
Picture Note: Side frame removed for picture clarity.
8. Slightly loosen cap screw (A) to allow rotation of neutral return plate.
• If wheel is rotating forward, rotate neutral return plate counterclockwise
until wheel rotation stops.
• If wheel is rotating in reverse, rotate neutral return plate clockwise until
wheel rotation stops.
9. Tighten cap screw (A).
10. Recheck neutral. If wheels continue to rotate, readjust.
11. With the engine running, operate the motion control levers to verify
adjustment.
• If engine will not crank over after adjustments are made, adjust the
neutral switch.
CAUTION: Avoid injury! Engine exhaust fumes contain
carbon monoxide and can cause serious illness or death.
Move the machine to an outside area before running the
engine.
Do not run an engine in an enclosed area without adequate
ventilation.
Connect a pipe extension to the engine exhaust pipe to
direct the exhaust fumes out of the area.
Allow fresh outside air into the work area to clear the
exhaust fumes out.
CAUTION: Avoid injury! Be aware of bystanders.
CAUTION: Avoid injury! Fingers or loose clothing can get
caught in rotating parts. Stop engine and wait for all moving
parts to stop before servicing.