Detroit Diesel 4000 Series, Service Manual, Page: 1388 / 2706

SERIES 4000 12/16V SERVICE MANUAL
6. Visually inspect sealing and mating surfaces for damage or wear.
[a] If sealing or mating surfaces show damage or wear, smooth with an oilstone or
emery cloth as necessary.
[b] If sealing or mating surfaces do not show damage or wear, continue inspection.
7. Visually inspect threads of components for damage or wear.
[a] If threads of components are damaged or worn, machine as necessary.
[b] If threads of components are beyond repair, replace component as necessary.
[c] If threads of components are not damaged, continue inspection.
8. Replace sealing rings and gaskets.
All information subject to change without notice.
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