Checking Fan Belt Tensioner Spring Tension

CQ280292-UN-09APR08

A - Mark

B - Mark

C - Bore

A belt tension gauge will not give an accurate measure of the belt tension when automatic spring tensioner is used. Measure tensioner spring tension using a torque wrench and procedure outlined below:

1. Release tension on belt using a long-handle 1/2 inch breaker bar in tension arm. Remove belt from pulleys.

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

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

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

5. Couple a torque wrench to hole (C) and turn rocker arm until marks (A) and (B) are aligned.

6. Record torque wrench measurement and compare with specification below. Replace tensioner assembly as required.

Item	Measurement	Specification
Spring	Tension	24-28 N˙m (17-21 lb-ft)