Detroit Diesel 4000 Series, Service Manual, Page: 1630 / 2706

SERIES 4000 12/16V SERVICE MANUAL
C 207.05.08 M – INSPECTION AND REPAIR
Perform the following steps to clean and inspect the raw water lines:
1. Clean lines with cold cleaner and brush.
2. Visually inspect plug-in connections and ring grooves in elbows and connecting lines for
wear, indentations and pitting.
[a] If wear, indentations or pitting is present, rub down with oilstone or emery cloth
as necessary.
[b] If damage is beyond repair, replace component.
[c] If wear, indentations and pitting are not present, continue inspection.
3. Visually inspect the sealing surfaces for evenness.
[a] If sealing surface is uneven, smooth with emery cloth as necessary.
[b] If damage is beyond repair, replace component as necessary.
[c] If sealing surface is even, continue inspection.
4. Replace clamps and rubber sleeve as part of W6 overhaul.
5. Visually inspect clamps and rubber sleeves for damage.
[a] If rubber clamps are worn or damaged, replace component.
[b] If rubber clamps are not worn or damaged, continue inspection.
6. Replace O-rings, gaskets and sealing rings.
Perform these steps to clean and inspect the raw water pump:
1. Clean all components.
2. Visually inspect the spiral housing, impeller, intermediate element and bearing housing for
cracks using the surface crack-testing method with red penetrant dye.
3. Visually inspect the pump shaft and gear for cracks using the magnetic crack-testing
method with fluorescent magnetic powder.
[a] If cracks are present, replace component.
[b] If cracks are not present, continue inspection.
4. Visually inspect for cracks.
[a] If part is cracked, replace as necessary.
[b] If part is not cracked, continue inspection.
5. Visually inspect spiral housing and impeller for cavitation.
[a] If pitting is over 1 mm in depth, replace component.
[b] If pitting is not over 1 mm in depth, continue inspection.
All information subject to change without notice.
C -1484
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