Detroit Diesel DD15 EuroIV Operator's Manual page 86

How to Procedures
8. Start the engine with the accelerator pedal in the idle position. Monitor the
oil pressure gauge or indicator lamp. Maintain the engine running at idle
until a stable oil pressure reading of 97 kPa (14 psi) or more is maintained
for one minute.
9. Check for leaks.
NOTICE: Increasing engine speed above idle before oil pressure has
stabilized may cause severe engine damage.
10. Allow the engine to reach operating temperature of 60°C (140°F).
11. Increase engine speed to 1800 rpm for three minutes.
12. Return the engine to idle and allow to idle for approximately one minute,
then shut down the engine.
13. Check for leaks.
Removal of the Water Coalescer/Final Filter
Remove the water coalescer/final filter as follows:
NOTICE: Do not tilt the water coalescer/final filter when removing it from
the housing. Possible damage to the water coalescer/final filter or stand
pipe may occur.
1. Using a 36mm socket, unscrew the water coalescer/final filter cap.
2. Pull the cap and water coalescer/final filter straight up and allow the fuel to
drain back.
3. Remove the water coalescer/final filter (2) from the water coalescer/final
filter cap (1) by placing the filter on a solid surface with the drain back plug
location at 12 o'clock (3) and apply pressure on the water coalescer/final
filter cap at an angle.
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All information subject to change without notice.