Replacing Fan and Alternator Belts

RG18591-UN-26MAY10

RG18590-UN-26MAY10

RG18589-UN-26MAY10

A - Alternator

CSP - Crankshaft Pulley

FC - Refrigerant Compressor

FD - Fan Drive

I - Idler Pulley

T - Tensioner

CP - Coolant Pump

GI - Grooved Idler Pulley

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.

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

2. To replace belt with automatic tensioner, release tension on belt using a long handled 1/2 inch drive tool in square hole in end of tensioner arm.

   To replace belt with manual tensioner, release tension at belt tensioner (See MANUAL BELT TENSIONER ADJUSTMENT in Lubrication and Maintenance/500 Hour/12 Month Section.)

3. Remove poly-vee belt from pulleys and discard belt.

4. 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.

   Install new belt, making sure belt is correctly seated in all pulley grooves. Text on belt (such as John Deere or part number) should be readable when standing at the front of the engine looking back toward the rear. Refer to belt routing at right for your application.

5. Apply tension to belt with tensioner. Remove drive tool.

6. Install fan guard if removed.

7. Start engine and check belt alignment.