Detroit Diesel 4000 Series, Service Manual, Page: 822 / 2706

SERIES 4000 12/16V SERVICE MANUAL
C 073.05.08 – INSPECTION AND REPAIR
Perform the following steps for inspection and repair of the high-pressure pump:
1. Visually inspect high-pressure pump.
[a] If repairs are necessary, conduct repairs in a specialist workshop or at manufacturers.
[b] If no repairs are necessary, continue inspection.
2. Visually inspect hex bolts for wear or damage.
[a] If hex bolts are worn or damaged, replace bolts as necessary.
[b] If hex bolts are not worn or damaged, continue inspection.
3. Ensure that threads of hex bolts are in perfect condition.
[a] If hex bolt threads are worn or damaged, replace bolts as necessary.
[b] If hex bolt threads are not worn or damaged, continue inspection.
4. Visually inspect condition of threads on high-pressure pump for perfect condition and
ease of movement.
[a] If threads on high-pressure pump are worn or damaged or do not show ease of
movement, rechase threads.
[b] If threads on high-pressure pump are not worn or damaged and show ease of
movement, continue inspection.
5. Visually inspect drive gear.
[a] If drive gear is worn or damaged, replace as necessary.
[b] If drive gear is not worn or damaged, continue inspection.
6. Visually inspect condition of wiring.
[a] If wiring is worn or damaged, replace as necessary.
[b] If wiring is not worn or damaged, continue inspection.
7. Visually inspect weep hole for oil and fuel discharge. See Figure 502.
[a] If weep hole is contaminated with oil and fuel discharge, clean as necessary.
[b] If oil or fuel emerges from weep hole, replace high-pressure pump.
All information subject to change without notice.
C -676
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