Checking; Servicing - Kubota WSM J Series Workshop Manual

J SERIES, WSM
[2] LUBRICATING SYSTEM

(1) Checking

(2) Servicing

Engine Oil Pressure
1. Remove the oil switch, and set a oil pressure tester (Code No.
07916-32032).
2. Start the engine. After warming up, measure the oil pressure of
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 At rated
pressure speed
(When reassembling)
• After checking the engine oil pressure tighten the oil switch to the
specified torque.
Tightening torque Oil switch
Rotor Lobe Clearance
1. Measure the clearance between lobes of the inner rotor and the
outer rotor with a feeler gauge.
2. If the clearance exceeds the factory specifications, replace the oil
pump rotor assembly.
Factory
Rotor lobe clearance
spec.
S-101
196 to 490 kPa
Factory spec. 2.0 to 5.0 kgf/cm
36 to 71 psi
147 kPa
2
Allowable limit 1.5 kgf/cm
27 psi
14.7 to 19.6 N·m
1.5 to 2.0 kgf·m
10.8 to 14.5 ft-lbs
Z482 0.03 to 0.14 mm
D722 0.0012 to 0.0055 in.
D1005 0.06 to 0.18 mm
V1305 0.0024 to 0.0071 in.
KiSC issued 10, 2016 A
ENGINE
2
W10373890
W10378950