Mower Belt Replacement

NOTICE

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.

2.Lower the mower deck to its lowest cutting position and remove the mower deck guards.

Regular Maintenance

B

A

 

61” Models

WARNING

B

Use extreme caution when rotating the idler

A

arm with the breaker bar, 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.

 

3.

Using a 1/2” breaker bar, place the square end in the

 

72” Models

 

 

 

 

square hole located in the end of the idler arm (A,

 

 

 

 

 

 

 

Figures 47). Carefully rotate the breaker bar COUNTER-

Figure 47.

Mower PTO Belt

 

 

 

CLOCKWISE, which will relieve the tension on the belt

A.

Idler Arm

 

 

 

 

exerted from the idler arm.

 

 

B.

Stationary Idler Pulley

 

 

4.

Slide the drive belt over the edge of the stati

nary idler

for

 

 

 

C

 

pulley (B). Carefully release the tension on the breaker

D

 

 

 

 

 

 

 

 

bar or the combination wrench.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

5. Remove the old belt and replace with a new one. Make

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

(Figure 48).

Not

 

 

 

 

 

 

6.

 

 

 

 

 

 

 

Install the drive belt on the PTO pulley, the s

indle

 

 

 

 

 

 

 

pulleys and all idler pulleys except the stationary

 

A

 

 

 

A

 

pulley (B, Figure 47). Carefully rotate the br

ak r bar

 

 

 

 

 

COUNTER-CLOCKWISE and install the b lt on the

 

 

 

 

 

D

 

stationary idler pulley (B). Carefully rel ase the t nsion

 

 

 

 

A

 

 

61” Models

D

 

 

on the breaker bar.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7. Reinstall the mower deck guards.

 

 

 

 

D

 

 

C

8. Run the mower under no-load condition for about 5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

minutes to break-in the new belt.

Reproduction

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

D

 

 

A

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

72” Models

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 48. Mower PTO Belt Routing

 

 

 

 

 

A.

Spindle Pulley

 

 

 

 

 

 

 

B.

PTO Drive Belt

 

 

 

 

 

 

 

C.

Spring-loaded Idler Pulley

 

 

 

 

 

 

D.

Stationary Idler Pulley

 

 

37