Cooling System
02
070
6
RG,RG34710,225 –19–30SEP97–2/2
RG8727 –UN–10DEC97
Marking Upper Belt Tensioner
RG8726 –UN–10DEC97
Testing Upper Tensioner
A—Mark on Swing Arm
B—Mark on Tensioner Base
Checking Upper 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 long handle 1/2-in.
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 first mark (A) and put a
second mark (B) on tensioner mounting base.
5. Rotate the swing arm using a 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
Belt Tensioner Upper Spring—
Tension 18—23 N•m (13—17 lb-ft).............................................................
CTM100 (06APR04)
02-070-6
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=290
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