Inspecting Belt Tensioner

RXA0109394-UN-16AUG10

Hood Release Loop

RXA0109517-UN-19AUG10

Belt Cover

A - Hood Release Loop

B - Cap Screws

NOTE: Fan drive belt is equipped with an automatic tensioner which does not require adjustment.

1. Pull hood release (A) and raise hood.

2. Remove cap screws (B) and remove belt cover.

3. 
   RXA0109509-UN-19AUG10

   A - 1/2 in. Drive Breaker Bar

   B - Belt Tensioner

   Release tension on belt using 1/2 in. drive ratchet or breaker bar (A) on belt tensioner (B).

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4. Remove belt from alternator pulley.

5. Release tension on belt tensioner (B) and remove breaker bar.

6. 
   RXA0109511-UN-19AUG10

   
   RXA0109513-UN-19AUG10

   B - Mark on Tension Arm

   C - Mark on Mounting Bracket

   Measure 21 mm (13/16 in.) from (B) and put a mark (C) on mounting bracket.

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7. Rotate tension arm with a torque wrench until marks (B and C) align. If torque wrench measurement is not within specification, replace tensioner mechanism. (See your John Deere™ dealer.)

   Item	Measurement	Specification
   Tension Arm	Torque	18—23 N·m (159—204 lb-in.)

8. Install belt and side shield.

9. Lower hood.

RXA0111135-UN-07OCT10