CHECKING BELT WEAR
The belt tensioner is designed to operate within the limit
of arm movement provided by the cast stops (A and B)
when correct belt length and geometry is used.
1. Visually inspect cast stops (A and B) on belt tensioner
2. If the tensioner stop on swing arm (C) is hitting the
fixed stop (B), check mounting brackets (alternator, belt
tensioner, etc.) and the belt length. Replace belt as
CHECKING TENSIONER SPRING TENSION
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 breaker bar and
socket on tension arm. Remove belt from pulleys.
2. Release tension on tension arm and remove breaker
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 (C).
6. Record torque wrench measurement and compare with
specification below. Replace tensioner assembly as
Spring Tension ................................................. 18--22 N·m (13--16 lb-ft)