Operators Manual

Table Of Contents
Replacement of Belts
DD Platform engines utilize a specially designed EPDM belt material which is
exclusive to the OE component. Replacement with an aftermarket part may lead to
shortened maintenance intervals and excessive noise.
If the vehicle is operated in severely cold/hot temperatures, or is exposed to
significant dust/debris/road salt, the belts may require replacement prior to mileage
specified in the maintenance interval section.
Inspection of the Air Intake System
Perform the following maintenance on the Air Intake System:
1. Inspect all the connections in the air system to make sure they are tight and
leak-free.
2. Check all hoses and ducting for punctures, deterioration, or other damage
and replace, if necessary.
Monitoring the Air Cleaner
The engine is equipped with an engine-mounted air cleaner that is flat in design to
accommodate various vehicle packages. Replace dry-type air cleaner elements
when the maximum allowable air intake restriction has been reached.
1. Check the air cleaner restriction gauge (filter minder) daily. Refer to section
“Air Cleaner Inspection” in the vehicle’s maintenance manual.
2. Check the gaskets for deterioration and replace, if necessary.
3. Inspect the entire air system daily for leaks daily. Look especially for torn
air inlet piping or boots, and loose or damaged clamps. Have worn or
damaged parts repaired or replaced. Re-tighten loose connections.
DD Heavy Duty Platform Operators Manual
All information subject to change without notice. 143
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