Operation Manual

BX25. 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
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
(When reassembling)
• After checking the engine oil pressure, tighten the engine oil
pressure switch to the specified torque.
14.7 to 19.6 N'm
Tightening torque Oil pressure switch 1.5
to 2.0 kgf·m
10.8 to 14.5 ft-Ibs
3TAAAAF1P014A
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.
Relief valve spring
Factory spec.
Allowable limit
32mm
1.26 in.
28mm
1.10 in.
39.2 to 49.0 N'm
Tightening torque Joint
4.0 to 5.0 kgf'm
29.0 to 36.3 ft-Ibs
(1) Relief Valve
(3) Spring
(2) Joint
W10756890
1-S14