FE350 ENGINE
Oil Pump
2001 Pioneer 900 Gasoline Vehicle Maintenance and Service Manual Page 13-33
13
Oil Pump Inspection
1. Check the clearance between the inner and outer rotors (5) with a feeler gauge (6). Measure the clearance
between the high point of the inner rotor and the high point of the outer rotor (Figure 13-66, Page 13-33).
2. Replace both rotors as a set if the measurement exceeds 0.012 inch (0.3 mm).
3. Remove inner and outer rotors (11) (Figure 13-65, Page 13-33).
4. Inspect the inner and outer oil pump rotors. If the rotors are worn or damaged, replace them.
4.1. Measure the pump shaft bearing surface. Replace both rotors as a set if the measurement is less
than 0.4971 inch (12.627 mm) (Figure 13-67, Page 13-33).
4.2. Using a micrometer, measure the diameter of the outer rotor at several points (Figure 13-68,
4.3. If the rotor diameter is less than 1.5923 inches (40.467 mm), replace both rotors.
4.4. Using a micrometer, measure the thickness of the outer rotor at several points (Figure 13-69,
4.5. If the rotor thickness is less than 0.3905 inch (9.920 mm), replace both rotors.
Figure 13-65 Oil Pump Removal
Figure 13-66 Measure Rotor Clearance
Figure 13-67 Measure Pump Shaft Bearing Surface
Figure 13-68 Measure Outer Rotor O.D.
TYPICAL 6
PLACES
8
9
11
10
7
1
3
6
5
4
2
5
6
5
A
B
Measure two
places 90
°
apart.
5
A
B
Measure two
places 90
°
apart.
