Replacing Alternator Belt (With Automatic Tensioner)

RG9856-UN-05JAN99

Remove Belt Guard

RG12077-UN-26FEB02

Belt Routing

A - Cap Screws

ALT - Alternator

CSP - Crankshaft Pulley

I - Idler Pulley

T - Tensioner

CP - Coolant Pump

Refer to CHECKING BELT TENSIONER SPRING TENSION AND BELT WEAR in Lubrication and Maintenance/500 Hour/12 Month Section for additional information on the belt tensioner.

CAUTION: Belt guard should be in place at all times when engine is running.

NOTE: While belt is removed, inspect pulleys and bearings. Rotate and feel for hard turning or any unusual sounds. If pulleys or bearings need replacement, see your John Deere dealer.

1. Remove cap screws (A) and carefully remove belt guard from engine.

2. Release tension on belt using a breaker bar and socket on tension arm and remove poly-vee belt from pulleys.

3. Inspect belts for cracks, fraying, or stretched out areas. Replace if necessary.

4. Install new belt, making sure belt is correctly seated in all pulley grooves. Refer to belt routing at right.

5. Apply tension to belt with tensioner. Remove socket.

6. Start engine and check belt alignment.