Inspect Fan Belt Tensioner

LV12526-UN-13APR05

LV12528-UN-12APR05

Adjust Tension

A - Mark on Swing Arm

B - Mark on Tensioner Mounting Base

C - Torque Wrench

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 belt.

3. Put a mark (A) on swing arm of tensioner as shown.

4. Measure 21 mm (0.83 in.) from (A) and put a mark (B) on tensioner mounting base.

5. Rotate the swing arm using a torque wrench until marks (A and B) are aligned.

   PULL tensioner with torque wrench away from engine.

6. 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.)

7. Install fan belt. (Refer to Replace Fan Belt in this section.)