Troubleshooting, Adjustment & Service

Mower Belt Replacment

To avoid damaging belts, DO NOT

PRY BELTS OVER PULLEYS.

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.

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.

A

B

Figure 51. Mower PTO Belt (61” Mower Deck)

A.Idler Arm

B.Stationary Idler Pulley

2. For 61” deck: Using a 1/2” breaker bar, place

 

 

 

 

 

the square end in the square hole located in the

 

 

B

 

 

except the stationary pulley (B, FigureReprod51).uction

 

 

end of the idler arm (A, Figure 51). Carefully

for

 

 

 

rotate the breaker bar COUNTER-CLOCKWISE,

 

 

A

 

 

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

 

 

 

 

 

52) 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 stationa y

 

 

 

 

idler pulley (B). Carefully release theNottension n

 

Figure 52. Mower PTO Belt (72” Mower Deck)

the breaker bar or combination wrench until the

 

 

A. Nut

 

 

 

idler arm comes to a stop.

 

 

 

 

 

B. Stationary Idler Pulley

 

 

4. Remove the old belt and replace with a n w one.

 

 

 

 

 

 

 

 

Make sure the V-side of the belt runs in the pulley

 

 

 

 

grooves (Figure 53).

 

D

 

B

C

5. For 61” deck: Install the drive belt on the PTO

 

 

 

 

 

pulley, the spindle pulleys and all idler pulleys

 

 

 

 

 

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

 

A

 

 

A

PTO pulley, the spindle pulleys and all idler

 

 

 

D

 

D

 

 

pulleys except the stationary pulley (B, Figure

 

 

 

 

 

 

A

 

52). Carefully rotate the combination wrench

 

 

 

 

 

 

 

 

 

CLOCKWISE and install the belt on the stationairy

Figure 53. Mower PTO Belt Routing

 

idler pulley (B). Carefully release the tension on

 

A. Spindle Pulley

 

 

 

the combination wrench.

 

B. PTO Drive Belt

 

 

 

6. Run the mower under no-load condition for about

 

C. Spring-loaded Idler Pulley

 

 

5 minutes to break-in the new belt.

 

D. Stationary Idler Pulley

 

 

 

 

 

 

 

46

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