PowerTec OMRG25204 - Manual (Page 88)

Lubrication & Maintenance/500 Hour/12 Month
OURGP12,000004A –19–28JUL04–3/3
RG7977
–UN–14NOV97
Marks on Tensioner
RG12054
–UN–08JAN02
Align Marks
RG12065
–UN–28JAN02
Align Torque Wrench With Pulley And Tensioner
A—Mark On Swing Arm
B—Mark On Tensioner Mounting Base
C—Torque Wrench
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:
NOTE: Later engines have a 12.7 mm (1/2 in.) square
drive hole in tensioner, so no socket drive is
required.
1. Release tension on belt using a breaker bar and
socket (if required) on 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 (A) and put a mark (B)
on tensioner mounting base.
5. Install torque wrench (C) so that it is aligned with
center of pulley and tensioner. Rotate the swing arm
with the torque wrench until marks (A and B) are
aligned.
6. Record torque wrench measurement and compare with
specification below. Replace tensioner assembly as
required.
Specification
Spring Tension—Torque 18-22 N•m (13-16 lb-ft) .......................................
NOTE: Threads on earlier belt tensioner roller cap screw
are LEFT-HAND threads.
35-8
110306
PN=88