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OM4066
SOUND ATTENUATION SYSTEM SERVICE INTERVALS
Recommended preventive maintenance will contrib-
ute to the long life and dependability of the truck and
its components. The use of proper checks and
adjustments at the recommended intervals is most
important.
EVERY 10 HOUR (DAILY) MAINTENANCE
Item
Exhaust System
Retarding Grid
Alternator Air Intake
Silencer
10 HOUR (DAILY) INSPECTION CHECKS
Inspect exhaust blankets for incorrect placement or damage. Re-install correctly or
replace blankets if any signs of damage. Inspect the exhaust for signs of significant
exhaust leaks or cracks. Cracks can be welded or the part can be replaced if
cracking is extensive.
Inspect visible air flow paths for debris or mud. Do not remove any baffles to perform
inspection. Remove any debris found in the air flow paths. Screens may be
removed to remove the debris. Screen mounting hardware torque is (30 ft lb). DO
NOT use an impact wrench to tighten.
Inspect visible air flow paths for debris or mud. Replace silencer element if any
defects are found. Do not remove any baffles or screens to perform inspection.
Lubrication & Service - Section 40
The service intervals presented here are in hours of
operation. However, if the truck is being operated
under extreme conditions, some or all, of the inter-
vals may need to be shortened and the service per-
formed more frequently.
Task
Page 40-1
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