NOTE: If any of the below conditions exist, it may be necessary to take the
vehicle to an authorized Detroit™ service outlet.
1. Make a visual check for leaks at all engine-mounted lines and connections.
2. Inspect all hoses for leaks, and check all fittings, clamps and ties carefully.
Look for cover damage and/or indications of twisted, worn, crimped, brittle,
cracked or leaking hoses and lines. Hoses with their outer cover worn
through or with damaged metal reinforcements should be considered unfit
for further use and replaced.
3. Make sure hoses are not resting on or touching shafts, couplings, or heated
surfaces including exhaust manifolds, sharp edges, or other obvious
hazardous areas.
4. Since all machinery vibrates and moves to a certain extent, clamps and ties
can fatigue with age. To ensure continued proper support, inspect fasteners
frequently and tighten or have them replaced as necessary.
5. Take immediate corrective action for any loose or cracked fittings or
ruptured or worn through hoses.
Inspection of the Lubricating System
Inspection of the Lubrication System
Detroit™ Gen 5 Heavy Duty engines are equipped with a single cartridge-style oil
filter that is part of the oil coolant module. Incorporated into the module is a drain
back port, which allows residual oil to be returned to the oil pan when the filter is
removed. This design, including the cartridge-style element, allows for a more
environmentally safe oil change. The lubricating oil and filter should be replaced as
recommended in the maintenance tables using the appropriate engine duty cycle,
Refer to section "Preventive Maintenance Tables".
Checking the Lubricating Oil Level
The lubricating oil level should be inspected daily as part of the pre-start
inspection, Refer to section "How to Check the Lubricating Oil Level". If
necessary, fill the engine to the proper level with the recommended viscosity and
grade of engine oil Refer to section "Synthetic Oils and Additives".
Checking the Lubricating System for Leaks
Check as follows:
1. Inspect all lubricating oil lines for wear and/or chafing.
2. Check for oil leaks after starting the engine.
NOTE: If any of the above conditions exist it may be necessary to take the
vehicle to an authorized Detroit™ service outlet.
Gen 5 DD Platform Operators Manual
All information subject to change without notice. 63
DDC-SVC-MAN-0217 Copyright © 2020 DETROIT DIESEL CORPORATION
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