Detroit Diesel 4000 Series, Service Manual, Page: 1251 / 2706

SERIES 4000 12/16V SERVICE MANUAL
[b] If sealing surface is not uneven, continue with inspection. See Figure 748.
1. Sealing Surface
Figure 748 Inspecting Sealing Surfaces of Pressure Regulator Valve
To avoid personal injury, use care when dealing with fluids
under pressure. Fluids under pressure have enough force
to penetrate the skin. These fluids can cause a minor cut
or opening in the skin. If injured by escaping fluid, see a
doctor immediately. Serious infection or adverse reaction
to the fluid can result if not treated immediately.
3. Visually inspect pressure regulator valve opening pressure.
NOTE:
The valve limits the oil flow so that a constant pressure of 5.5 bar± 1 bar is maintained
at the last main bearing. Medium temperature is 90
C to 100 C. Design pressure at
n/min n/max of oil pump is 1.5 bar/7 bar.
4. If opening pressure is exceeded or not reached, replace pressure regulator valve.
All information subject to change without notice.
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