F510 & F525 Cylinder Block – INSPECT OIL PUMP—PA420A

1. Inspect all parts for wear or damage. Replace as necessary.
A—Plate
B—Spring
C—Ball
D—Gear
E—Cover
F—Screen
G—Outer Rotor
H—Rotor Shaft With Gear

2. Measure outside diameters of shaft. Replace both shaft and outer rotor if less than specification.
SPECIFICATIONS
Minimum Shaft O.D.
Large O.D. . . . . . . . . . . . . . . . . . . . . . . . . 12.63 mm (0.497 in.)
Small O.D. . . . . . . . . . . . . . . . . . . . . . . . . . 7.94 mm (0.313 in.)

3. Measure rotor shaft bearings. Replace oil pump cover or crankcase cover if greater than specifications.

SPECIFICATIONS
Maximum Rotor Shaft Bearing I.D.
Oil Pump Cover . . . . . . . . . . . . . . . . . . . . . 12.76 mm (0.502 in.)
Crankcase Cover . . . . . . . . . . . . . . . . . . . . . 8.07 mm (0.318 in.)

4. Measure thickness of outer rotor. Replace both outer rotor and shaft if less than 11.92 mm (0.470 in.).
5. Measure outer rotor bearing depth (A). Replace oil pump cover if greater than 12.14 mm (0.478 in.).

6. Measure inside diameter of rotor bearing. Replace oil pump cover if greater than 29.20 mm (1.149 in.).
7. Measure outside diameter of rotor. Replace both rotor and shaft if less than 28.95 mm (1.140 in.).

8. Measure relief valve spring. Replace if free length is less than 19.00 mm (0.750 in.).

06. June 2021 by samuel07042012
Categories: F510-F525 | Leave a comment

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