Service Manual

ISB, ISBe and QSB (Common Rail [...] Drive Belt, Sea Water Pump
Section 8 - Cooling System - Group 08 Page 8-123
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Inspect for Reuse
Inspect the belts daily. Replace the belts if they are
cracked, frayed, or have chunks of material missing.
Small cracks are acceptable.
Adjust belts that have a glazed or shiny surface, which
indicates belt slippage. Correctly installed and tensioned
belts will show even pulley and belt wear. Belt damage
can be caused by:
• Incorrect tension
• Incorrect size or length
• Pulley misalignment
• Incorrect installation
• Severe operating environment
• Oil or grease on the belts.
Install
Belt installation with adjustment tensioner:
Install the belt over the pulleys.
Tighten the belt by turning the adjusting screw clockwise
Measure the belt tension in the center span of the pulleys.
Refer to Procedure 018-005 (Belt Tension) in Section V
for the correct gauge and tension value for the belt width
used.
An alternate method (deflection method) can be used to
check belt tension by applying 110 N [25 lbf] of force
between the pulleys on v-belts. If the deflection is more
than one belt thickness per foot of pulley center distance,
the belt tension must be adjusted.