MAINTENANCE or equivalent. If tension is 250 lbs (1,112 N) or more, no retensioning is required. If tension is less than 250 lbs (1,112 N), retension to 250 lbs (1,112 N). Measure belt tension every month or every 7,500 miles (12,000 km), whichever comes first. Retension to 250 lbs (1,112 N) as required. On Highway Vehicle Engines 7,500 miles (12,000 km) To clean either the hair type or the polyurethane type compressor air strainer element, saturate it and squeeze it in fuel oil or any other cleaning agent that is not detrimental to the element until it is dirt-free. Then saturate the element in lubricating oil and squeeze it dry before placing it back into the air strainer.
Belt Replacement Drive belts (V and poly-V) should be replaced every 2,000 hours or 100,000 miles (160,000 km). For air strainer replacement, contact the nearest servicing dealer. Replace hair type elements with the polyurethane type, if available. Replace all belts in a set when one is worn. Single belts of similar size should not be used as a substitute for a matched belt set. Premature belt wear can result because of belt length variation. All belts within a matched set are within .032 in. (0.8 mm) of their specified center distances.
The air compressor mounting bolts should be tightened every 12 months or 30,000 miles (48,000 km) for on-highway engines or every 300 hours for industrial applications. When installing or adjusting an accessory drive belt, be sure the bolt at the accessory adjusting pivot point is properly tightened, as well as the bolt in the adjusting slot. In addition, check the torque on the alternator and bracket mounting bolts. Retighten as required. Item 10 Air Cleaner The air cleaner element should be inspected every 15,000 miles (24,000 km) for vehicle engines. Replace the element, if necessary. Check the gaskets for deterioration and replace, if necessary.
If the dry type air cleaner is equipped with an aspirator, check for aspirator damage or clogging. Clean, repair or replace, as necessary. Item 9 – Air Compressor All air compressor intake parts should be removed and cleaned at the following intervals: 66 All information subject to change without notice. DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION