Readings must be within limits given in table 4-35. The
letter L shows a loose fit. If readings are not within
given limits, get a new oil pump.
Measure depth of pressure pump drive impeller bore (1).
M e a s u r e length A of pressure pump drive impeller (2).
M e a s u r e clearance between pressure pump drive impeller (2) and top of
p r e s s u r e pump drive impeller bore (1).
GO TO FRAME 16
Table 4-35. Oil Pump Drive Impeller and Impeller Bore Wear Limits
Size and Fit
of New Parts
Item /Point of Measurement
Pressure pump drive impeller
1.3770 to 1.3790
P r e s s u r e pump drive impeller
1.3735 to 1.3750
C l e a r a n c e between pressure
p u m p drive impeller and top
o f drive impeller bore