1-S14
BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM
ENGINE
(2) Lubricating System
Engine Oil Pressure
1. Remove the engine oil pressure switch, and set an oil pressure
tester. (Code No. : 07916-32032.)
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
• Foreign matter in the relief valve
(When reassembling)
• After checking the engine oil pressure, tighten the engine oil
pressure switch to the specified torque.
W10349520
Relief Valve
1. Remove the oil filter base
2. Check the relief valve for dirt, and the seat and ball for damage.
3. If damaged, replace.
4. Check the free length of spring.
5. If less than the allowable limit, replace.
W10756890
Engine oil pressure
At idle
speed
Factory
spec.
More than 49 kPa
0.5 kgf/cm
2
7 psi
At rated
speed
Factory
spec.
196 to 441 kPa
2.0 to 4.5 kgf/cm
2
28 to 64 psi
Allowable
limit
147 kPa
1.5 kgf/cm
2
21 psi
Tightening torque Oil pressure switch
14.7 to 19.6 N·m
1.5 to 2.0 kgf·m
10.8 to 14.5 ft-lbs
Relief valve spring
Factory spec.
32 mm
1.26 in.
Allowable limit
28 mm
1.10 in.
Tightening torque Joint
39.2 to 49.0 N·m
4.0 to 5.0 kgf·m
29.0 to 36.3 ft-lbs
(1) Relief Valve
(2) Joint
(3) Spring
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