Inspect Fan Belt Tensioner—5065M and 5075M

PULV000155-UN-29OCT07

A - Belt

B - Tensioner

NOTE: A belt tension gauge will not give an accurate measurement of the belt tension. Measure tensioner spring tension using a torque wrench.

1. Place tractor in PARK and SHUT OFF engine. Remove key.

2. Remove fan guard.

3. Remove fan belt. (Refer to Replace Fan Belt—5065M and 5075M in this section.)

4. Put a mark on tensioner swing arm.

5. Measure 21 mm (0.83 in.) from swing arm mark and make a mark on tensioner mounting base.

6. Rotate swing arm using a torque wrench installed at tensioner (B) [use a 3/8 in. drive inserted in square hole] until mark on swing arm aligns with mark on mounting base.

7. Record torque wrench measurement and compare with specification. If recorded measurement is below specifications, have your John Deere dealer replace tensioner assembly.

   Item	Measurement	Specification
   Belt Tensioner	Torque	18—22 N˙m (159—195 lb-in.)

8. Install fan belt. (Refer to Replace Fan Belt—5065M and 5075M in this section.)

9. Install fan guard.