Detroit Diesel 4000 Series, Service Manual, Page: 1416 / 2706

SERIES 4000 12/16V SERVICE MANUAL
C 185.25.08 M – INSPECTION AND REPAIR
Perform the following steps for the inspection and repair of the oil return lines:
To avoid personal injury when blow drying, wear adequate
eye protection (safety glasses or face plate) and do not
exceed 276 kPa (40 lb/in.
2
) air pressure.
1. Clean oil return lines with diesel fuel and blow dry with compressed air.
To avoid an eye injury when using compressed air, wear
adequate eye protection (safety glasses or faceplate) and
do not exceed 276 kPa (40 lb/in.
2
) air pressure.
2. Visually inspect oil return lines for damage.
[a] If oil lines are damaged, replace as necessary.
[b] If oil lines are not damaged, continue inspection.
3. Pressure test oil return lines at 0.5 bar (7 lb/in.
2
) with compressed air in a water bath
to check for leaks.
[a] If leaks are found, replace oil line(s).
[b] If leaks are not found, continue inspection.
All information subject to change without notice.
C -1270
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