Kubota D902-E2B - Clearance between Outer Rotor and Pump Body; Correcting Cylinder (Oversize); Oil Pump; Rotor Lobe Clearance

S-71
SM-E2B SERIES, WSM
DIESEL ENGINE
Correcting Cylinder (Oversize)
1. When the cylinder is worn beyond the allowable limit, bore and
hone it to the specified dimension.
2. Replace the piston and piston rings with oversize ones.
Oversize : 0.25 mm (0.0098 in.)
Marking : 025
NOTE■
• When the oversize cylinder is worn beyond the allowable
limit, replace the cylinder block with a new one.
W10367470
(6) Oil Pump
Rotor Lobe Clearance
1. Measure the clearance between lobes of the inner rotor and the
outer rotor with a thickness gauge.
2. If the clearance exceeds the factory specifications, replace the oil
pump rotor assembly.
W10378950
Clearance between Outer Rotor and Pump Body
1. Measure the clearance between the outer rotor and the pump
body with a thickness gauge.
2. If the clearance exceeds the factory specifications, replace the oil
pump rotor assembly.
W10381420
Cylinder liner I.D.
Factory
spec.
D662-E2B
64.250 to 64.269 mm
2.52953 to 2.53027 in.
Z482-E2B
D722-E2B
D782-E2B
67.250 to 67.269 mm
2.64764 to 2.64839 in.
Z602-E2B
D902-E2B
72.250 to 72.269 mm
2.84449 to 2.84524 in.
Allowable
limit
D662-E2B
64.400 mm
2.53543 in.
Z482-E2B
D722-E2B
D782-E2B
67.400 mm
2.65354 in.
Z602-E2B
D902-E2B
72.400 mm
2.85040 in.
Finishing
Hone to 2.2 to 3.0 μmRz
(0.000087 to 0.00012 in.Rz)
∇∇∇.
(1) Cylinder I.D. (Before Correction) (2) Cylinder I.D. [Oversize]
Rotor lobe clearance Factory spec.
0.03 to 0.14 mm
0.0012 to 0.0055 in.
Clearance between
outer rotor and pump
body
Factory spec.
0.07 to 0.15 mm
0.0028 to 0.0059 in.
KiSC issued 06, 2006 A