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Troubleshooting, Adjustment & Service
Mower Belt Replacment
1. Park the tractor 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. For 61” deck: Using a 1/2” breaker bar, place
the square end in the square hole located in the
end of the idler arm (A, Figure 54). Carefully
rotate the breaker bar COUNTER-CLOCKWISE,
which will relieve the tension on the belt exerted
from the idler arm.
2. For 72” deck: Using a 3/4” combination
wrench, place the box end on the nut (A, Figure
55) securing the idler pulley located in the end
of the idler arm. Carefully rotate the wrench
CLOCKWISE, which will relieve the tension on the
belt exerted from the idler arm.
3. Slide the drive belt over the edge of the stationary
idler pulley (B). Carefully release the tension on
the breaker bar or combination wrench until the
idler arm comes to a stop.
4. Remove the old belt and replace with a new one.
Make sure the V-side of the belt runs in the pulley
grooves (Figure 56).
5. For 61” deck: Install the drive belt on the PTO
pulley, the spindle pulleys and all idler pulleys
except the stationary pulley (B, Figure 54).
Carefully rotate the breaker bar COUNTER-
CLOCKWISE and install the belt on the stationary
idler pulley (B). Carefully release the tension on
the breaker bar.
5. For 72” deck: Install the drive belt on the
PTO pulley, the spindle pulleys and all idler
pulleys except the stationary pulley (B, Figure
55). Carefully rotate the combination wrench
CLOCKWISE and install the belt on the stationairy
idler pulley (B). Carefully release the tension on
the combination wrench.
6. Run the mower under no-load condition for about
5 minutes to break-in the new belt.
To avoid damaging belts, DO NOT
PRY BELTS OVER PULLEYS.
Figure 54. Mower PTO Belt (61” Mower Deck)
A. Idler Arm
B. Stationary Idler Pulley
WARNING
Use extreme caution when rotating the idler
arm with the breaker bar or combination
wrench, due to the increased tension in the
spring as the idler arm is being rotated. Injury
may result if the breaker bar is prematurely
released while the spring is under tension.
Figure 56. Mower PTO Belt Routing
A. Spindle Pulley
B. PTO Drive Belt
C. Spring-loaded Idler Pulley
D. Stationary Idler Pulley
C
B
D
A
A
A
D
D
Figure 55. Mower PTO Belt (72” Mower Deck)
A. Nut
B. Stationary Idler Pulley
A
B
B
A