Lubricating System; Cooling System - Kubota WG972-E2 Workshop Manual

WG972-E2, DF972-E2, WSM

(2) Lubricating System

(3) Cooling System

Engine Oil Pressure
1. Remove the engine oil pressure switch, and set an oil pressure
tester.
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.
At idle
speed
Engine oil pressure
At rated
speed
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 lbs).
2. If the measurement is not within the factory specifications, loosen
the alternator mounting screws and relocate the alternator to
adjust.
Deflection (A) Factory spec.
(A) Deflection
S-17
GASOLINE / LPG ENGINE
More than 49 kPa
Factory
0.5 kgf/cm
spec.
7 psi
196 to 441 kPa
Factory
2
2.0 to 4.5 kgf/cm
spec.
28 to64 psi
147 kPa
Allowable
2
1.5 kgf/cm
limit
21 psi
14.7 to 19.6 N·m
1.5 to 2.0 kgf·m
10.8 to 14.5 ft-lbs
W10349520
7.0 to 9.0 mm
0.28 to 0.35 in.
KiSC issued 01, 2006 A
2
W1021011