Oil Pump - Kubota RTV1140CPX Workshop Manual

RTV1140CPX, WSM

(6) Oil Pump

Correcting Cylinder
1. When the cylinder is worn beyond the allowable limit, bore and
hone it to the specified dimension.
Factory specification
Oversized cylinder liner
I.D.
Allowable limit
Horn to 1.2 to 2.0 µm Rmax.
Finishing
(48 to 78 µin. Rmax.)
2. Replace the piston and piston rings with oversize ones.
Oversize: 0.5 mm (0.02 in.)
NOTE
• When the oversize cylinder is worn beyond the allowable
limit, replace the cylinder block with a new one
(1) Cylinder I.D. (Before Correction)
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.
Rotor lobe clearance Factory specification
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 factory specifications, replace the
oil pump rotor assembly.
Clearance between outer
Factory specification
rotor and pump body
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.
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 factory specifications, replace the
oil pump rotor assembly.
Clearance between rotor
Factory specification
and cover
1-S54
ENGINE
78.500 to 78.519 mm
3.0906 to 3.0912 in.
78.65 mm
3.096 in.
(2) Cylinder I.D. (Oversize)
9Y1210293ENS0099US0
0.060 to 0.18 mm
0.0024 to 0.0071 in.
9Y1210293ENS0100US0
0.100 to 0.180 mm
0.00394 to 0.00708 in.
9Y1210293ENS0101US0
0.025 to 0.075 mm
0.00099 to 0.0029 in.
9Y1210293ENS0102US0
KiSC issued 05, 2014 A