1-S65
ME8200, ME9000, WSM
ENGINE
[3] LUBRICATING SYSTEM
(1) Checking
Engine Oil Pressure
1. Remove the oil switch and set a pressure tester (Code No.
07916-32031).
2. Start the engine. After warming up, measure the oil pressure of
both idling and rated speeds.
3. If the oil pressure is less than the allowable limit, check the
following.
• Engine oil insufficient
• Oil pump defective
• Oil strainer clogged
• Oil filter cartridge clogged
• Oil gallery clogged
• Excessive oil clearance of bearing
• Foreign matter in the relief valve
(When reassembling)
• After checking the engine oil pressure, tighten the engine oil
pressure switch to the specified torque.
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(2) Disassembling and Assembling
Relief Valve
1. Remove the bolt (1).
2. Remove the relief valve (2), the spring (3) and the packing (4).
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Engine oil pressure
At idle
speed
Factory
spec.
98 kPa
1.0 kgf/cm
2
14 psi
Allowable
limit
49 kPa
0.5 kgf/cm
2
7 psi
At rated
speed
Factory
spec.
196 to 392 kPa
2.0 to 4.0 kgf/cm
2
28 to 56 psi
Allowable
limit
147.1 kPa
1.5 kgf/cm
2
21.3 psi
Tightening torque Relief valve
68.6 to 78.4 N·m
7.0 to 8.0 kgf·m
50.6 to 57.9 lbf·ft
(1) Bolt
(2) Relief Valve
(3) Spring
(4) Packing
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