Lubricating System; Cooling System - wsm STW37 Workshop Manual

STW34, STW37, STW40, WSM

(2) Lubricating System

(3) Cooling System

Engine Oil Pressure
1. Remove the engine oil pressure switch, and set an oil pressure
tester (Code No. 07916-32032). (Adaptor screw size: PT 1/8)
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 damaged
• Oil strainer clogged
• Oil filter cartridge clogged
• Oil gallery clogged
• Excessive oil clearance
• Foreign matter in the relief valve
At idle
speed
Engine oil pressure
At rated
speed
(When reassembling)
• After checking the engine oil pressure, tighten the engine oil
pressure switch to the specified torque.
Tightening torque Oil pressure switch
Fan Belt Tension
1. Measure the deflection (A), depressing the belt halfway
between the fan drive pulley and alternator pulley at specified
force (98 N, 10 kgf, 22 lbf).
2. If the measurement is not within the factory specifications,
loosen the alternator mounting screws and relocate the
alternator to adjust.
Deflection (A) Factory specification
(A) Deflection
1-S15
ENGINE
More than
Factory
98 kPa
specifica-
2
1.0 kgf/cm
tion
14 psi
50 kPa
Allowable
2
0.5 kgf/cm
limit
7 psi
Factory 300 to 440 kPa
2
specifica- 3.0 to 4.5 kgf/cm
tion
43 to 64 psi
250 kPa
Allowable
2
2.5 kgf/cm
limit
36 psi
15 to 19 N·m
1.5 to 2.0 kgf·m
11 to 14 lbf·ft
9Y1211109ENS0007US0
10 to 12 mm
0.40 to 0.47 in.
9Y1211109ENS0008US0
KiSC issued 11, 2014 A