Detroit Diesel 4000 Series, Service Manual, Page: 1560 / 2706

SERIES 4000 12/16V SERVICE MANUAL
C 206.05.08 – INSPECTION AND REPAIR
Perform the following steps for inspection and repair of the charge air cooling system
(low-temperature):
1. Clean all components.
2. Using surface crack-testing method and red penetrant dye, inspect impeller for cracks.
[a] If cracks are found, repair or replace impeller.
[b] If no cracks are found, continue inspection.
3. Using the magnetic crack-testing method with fluorescent magnetic powder, inspect
pump shaft and gear for cracks.
[a] If pump shaft or gear are cracked, replace components as necessary.
[b] If pump shaft or gear are not cracked, continue inspection.
4. Visually inspect sealing surfaces and/or annular grooves on elbow, housing, impeller and
inlet connection for wear, indentations and pitting.
[a] If sealing surfaces and/or annular grooves on elbow and housing, impeller and
inlet connection show wear, indentations or pitting, rub down with emery cloth or
an oilstone.
[b] If damage is beyond repair, replace component as necessary.
[c] If sealing surfaces and/or annular grooves on elbow and housing, impeller and inlet
connection do not show wear, indentations or pitting, continue inspection.
5. Visually inspect elbow, housing, impeller and inlet adapter for pitting.
[a] If pitting is over 1 mm in depth, replace component.
[b] If pitting is under 1 mm in depth, reuse component.
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.
6. Visually inspect elbow, inlet adapter and housing for leaks with compressed air under
water.
[a] If elbow, inlet adapter or housing show leaks, repair or replace components as
necessary.
[b] If elbow, inlet adapter or housing do not show leaks, continue inspection.
NOTE:
Water temperature should be within a minimum of 30
C to a maximum of 40 C.
All information subject to change without notice.
C -1414
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