Regular Maintenance

PTO Drive Belt Replacement

NOTICE

C

B

 

 

To avoid damaging belts, DO NOT pry belts over pulleys.

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 theA ignition key.

2. Remove the mower deck guard.

3. Position the mower deck in the TRANSPORT

 

 

Figure 42. Removing the PTO Drive Belt

 

position.

 

 

 

 

 

 

 

A. Idler Arm

 

 

 

 

 

 

 

 

WARNING

 

 

 

B. Left Spindle Pulley

 

 

 

 

C. PTO Drive Belt

 

Use extreme caution when rotating the idler

 

 

 

 

 

 

arm with the breaker bar, due to the increased

 

 

 

B

 

tension in the spring as the idler arm is being

 

 

 

A

 

 

rotated. Injury may result if the breaker bar is

 

 

 

 

 

 

 

 

 

prematurely released while the spring is under

 

 

 

 

 

tension.

Reproduction

 

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

for

 

 

 

the square hole located in the end of the idler arm

 

 

 

 

 

(A, Figure 42). Carefully rotate the breaker bar

 

 

 

 

E

CLOCKWISE, which will relieve the tension on

he

 

C

 

 

belt exerted from the idler arm.

 

 

 

 

 

 

 

5. Slide the PTO drive belt over the edge f the left

 

 

 

 

 

spindle pulley (B). Carefully release the tensi

n

 

 

 

D

 

on the breaker bar.

 

 

 

Figure 43. PTO Drive Belt Routing

 

6. Remove the old belt and replace with a new one.

 

 

 

 

 

Make sure the V-side of the belt

Notruns in the pulley

A. PTO Drive Belt

 

grooves.

 

 

 

B. PTO Clutch Pulley

 

 

 

 

C. Front Idler Pulley

 

7. Install the PTO drive belt (A, Figure 43) on the

 

 

 

D. Idler Arm Pulley

 

PTO clutch pulley (B), the front idler pull y (C)

 

 

 

 

 

E. Left Spindle Pulley

 

and the idler arm pulley (D). Carefully rotate the

 

 

 

 

 

7-1/4”

 

breaker bar CLOCKWISE and install the b lt on

 

 

 

 

the left spindle pulley (E). Carefully release the

 

A

 

(18.42 cm)

 

tension on the breaker bar.

 

 

 

 

 

 

 

 

 

 

 

 

 

8. Reinstall the mower deck guard.

 

 

 

 

 

 

 

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

 

C

 

 

 

5 minutes to break-in the new belt.

 

 

 

 

 

Checking the PTO Drive Belt Idler Tensioner

 

 

B

 

 

 

Spring Length

 

 

 

 

 

 

 

1. Set the mower deck at its middle cutting height.

 

D

 

 

 

 

 

 

 

 

2. Measure the coil to coil length of the PTO drive

 

belt tensioner spring (A, Figure 44). It should

Figure 44. PTO Drive Belt Idler Tensioner Spring

measure 7-1/4” (18.42 cm). If it does not, perform

A. PTO Drive Belt Idler Tensioner Spring Length

the Adjusting the PTO Drive Belt Idler Tensioner

B. Jam Nut

Spring Length.

C. Eyebolt

 

 

D. Adjustment Nut

36

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