Oil Pump; Relief Valve - Kubota WSM 07-E3B Series Workshop Manual

07-E3B SERIES, WSM

(6) Oil Pump

(7) Relief Valve

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 allowable limit, replace the oil pump
rotor assembly.
Factory spec.
Clearance between
inner rotor and outer
rotor
Allowable limit
Clearance between Outer Rotor and Pump Body
1. Measure the clearance between the outer rotor and the pump
body with a feeler gauge.
2. If the clearance exceeds the allowable limit, replace the oil pump
rotor assembly.
Factory spec.
Clearance between
outer rotor and pump
body
Allowable limit
Clearance between Rotor and Cover
1. Put a strip of plastigage onto the rotor face with grease.
2. Install the cover and tighten the screws with the specified torque.
3. Remove the cover carefully, and measure the amount of the
flattening with the scale and get the clearance.
4. If the clearance exceeds the allowable limit, replace oil pump
rotor assembly and the cover.
Factory spec.
Clearance between rotor
and cover
Allowable limit
Tightening torque Oil pump cover screw
Free Length of Relief Valve Spring
1. Measure the free length (A) with vernier calipers.
measurement is less than the allowable limit, replace it.
2. Check the entire surface of the spring for scratches. Replace it,
if any.
Factory spec.
Free length (A)
Allowable limit
Relief valve retaining
Tightening torque
screw
(1) Front Cover
(2) Relief Valve
(3) Spring
S-110
ENGINE
0.030 to 0.090 mm
0.0012 to 0.0035 in.
0.30 mm
0.012 in.
W1071254
0.100 to 0.184 mm
0.00394 to 0.00724 in.
0.30 mm
0.012 in.
W1071334
0.025 to 0.075 mm
0.00099 to 0.0029 in.
0.225 mm
0.00886 in.
7.9 to 9.3 N·m
0.80 to 0.95 kgf·m
5.8 to 6.8 lbf·ft
W1148218
60.0 to 60.5 mm
2.37 to 2.38 in.
55.0 mm
2.17 in.
69 to 78 N·m
7.0 to 8.0 kgf·m
51 to 57 lbf·ft
(4) Packing
(5) Relief Valve Retaining Screw
A : Free Length
W1265606
KiSC issued 06, 2020 A
If the