Operators Manual

Table Of Contents
NOTE: Change the engine oil only when the engine oil temperature is
approximately 60°C (140°F). Changing cold oil will result in extended drain
times.
WARNING: PERSONAL INJURY
To avoid injury, never remove any engine component while the
engine is running.
1. Place the transmission in neutral, and set the parking brake.
NOTICE: Use care to prevent foreign objects from entering the filter
housing.
2. Clean outside of the oil filter housing.
NOTICE: On some chassis models the air filter housing may interfere with
removing the oil filter cap and filter element straight up. If this is the case,
loosen or remove the air filter housing to allow for proper oil filter removal.
Removing the filter element on an angle may damage the oil filter standpipe
or bypass valve.
3. Using a 36-mm socket, unscrew the oil filter cap and filter and allow the oil
to drain into the housing. After draining is complete, remove the assembly
from the housing.
4. Remove the filter element by pressing and twisting the side and detaching it
from the cap.
5. Remove the oil filter cap O-ring and discard. Lightly coat a new O-ring with
clean engine oil and install it on the filter cap.
6. Check the filter housing for any debris and remove if necessary.
7. Insert a new filter element into the oil filter cap.
NOTICE: The oil filter bypass valve is very important to the operation of the
engine. If the valve becomes damaged, the oil filter will be bypassed at all
times. This allows unfiltered debris to flow throughout the entire lubrication
system and may cause severe engine damage.
8. Inspect the oil filter bypass valve (3) in the end of the standpipe (2) in the
oil filter housing. See illustration below. A broken bypass valve (1) is shown
on the right. Repair as necessary.
DD Heavy Duty Platform Operators Manual
All information subject to change without notice. 153
DDC-SVC-MAN-0189 Copyright © 2022 DETROIT DIESEL CORPORATION