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Service Manual Mitsubishi SL-Series diesel engines
Version 08/2004
ENGLISH
INSPECTION LUBRICATION SYSTEM
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37.3 Pressure relief valve
1. Check the valve seat for contact. Check the spring
for damage.
2. Measure the oil pressure at which the relief valve
opens (the oil pressure with the engine running at
the rated rpm). If the pressure is not correct,
remove the cap nut and increase or decrease the
amount of shims. The engine oil pressure tap is
located on the right side of the engine.
Figure 213 Checking pressure relief valve
Shims
Cap nut
Relief valve opening
pressure
3.5 ± 0.5 kgf/cm
2
(50 ± 7 psi)
[343 ± 49 kPa]
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