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Regular Maintenance
Mower Belt Replacement
1. Park the unit on a smooth, level surface such as a
concrete floor. Disengage the PTO, engage the parking
brake, turn off the engine, and remove the ignition key.
2. Lower the mower deck to its lowest cutting position and
remove the mower deck guard.
3. Using a 3/4” combination wrench, carefully rotate the
idler arm (A, Figure 29) counter-clockwise, which will
relieve the tension on the belt exerted from the idler
arm.
4. Slide the mower drive belt over the edge of the rear
stationary idler pulley (B). Carefully release the tension
on the idler arm.
WARNING
Spring loaded components can kick back
causing injury.
Use extreme caution when rotating the idler arm with the
combination wrench, due to the increased tension in the
spring as the idler arm is being rotated. Injury may result
in the breaker bar is prematurely release while the spring
is under tension.
NOTICE
To avoid damaging belts, do NOT pry belts over pulleys.
5. Remove the old belt (C) and replace with a new one.
Make sure the V-side of the belt runs in the pulley
grooves.
6. Install the mower drive belt on the PTO pulley, the
spindle pulleys (D) and all idler pulleys (E) except the
rear stationary pulley (B). Carefully rotate the 3/4”
combination wrench counter-clockwise and install the
belt on the rear stationary idler pulley. Carefully release
the tension on the 3/4” combination wrench.
7. Adjust the mower deck cutting height to 3” (7,62 cm).
8. Use the Mower Belt Idler Spring Length chart to
determine the correct spring length.
Mower Belt Idler Spring Length
Measurement
48” Models 6-1/2” (16,5 cm)
52” & 61” Models 6-3/8” (16,2 cm)
9. The measurement should equal the measurement as
designated in the chart. If the measurement does not
equal the measurement as designated in the chart,
adjust the anchor eyebolt (A, Figure 30) until the desired
measurement is acheieved.
10. Reinstall the mower deck guards.
11. Run the mower under no-load condition for about 5
minutes to break-in the new belt.
Figure 29. Mower Deck Belt Routing
A. Adjustable Idler Arm
B. Rear Stationary Idler Pulley
C. Mower Deck
D. Spindle Pulleys
E. Idler Pulley
F. 48” & 52” Mower Deck
G. 61” Mower Deck
D
D
B
E
E
B
D
D
D
E
E
F
Figure 30. Mower Belt Tensioner Spring Measurement
A. Anchor Eyebolt
B. Adjustment Nut
C. Mower Belt Tensioner Spring
D. Measurement
A
B
D
C
E
C
C
D
A
A
E
Not for
Reproduction