Inspecting Fan Belt Tensioner

1. 
   N74877-UN-23JAN07

   
   N74880-UN-24JAN07

   A - Cap Screw

   B - Cap Screw and Nut

   C - Cap Screw

   D - Left-Hand Engine Side Shield

   E - Breaker Bar

   Raise Hood.

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2. Remove cap screw (A and C) and cap screw and nut (B), lift left-hand engine side shield (D) off of alignment studs.

3. Release tension on belt using a 13 mm (1/2 in.) breaker bar (E).

4. Remove belt from alternator pulley.

5. Release tension on tension arm and remove breaker bar.

6. 
   RXA0068400-UN-10SEP03

   
   N76712-UN-14JUN07

   
   N76713-UN-14JUN07

   A - Torque Wrench

   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 torque wrench (A) 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.