4.2.2. Oil pump
1) Disassembly
(1) Disassembly of oil pump drive gear
a. Unscrew the screw and disassem-
ble the oil relief valve.
b. Loosen the washer for the oil
pump drive gear fixing nut and
remove the nut.
c. Disassemble the drive gear.
(2) Remove the oil pump cover fixing
nuts and disassemble the oil pump
cover.
The oil pump cover is fixed with the
two dowel pins.
(3) Disassemble the drive gear and dri-
ven gear.
- 85 -
EQM4006I
<Figure 4-6> Disassembling drive gear
EQM4007I
<Figure 4-7> Disassembling pump cover
2) Inspection and correction
(1) With steel rule and feeler gauge,
measure the axial end play of the oil
pump gear.
Replace if the measured value is
beyond the limit.
EQM4008I
<Figure 4-8> Measuring end play
(2) With a feeler gauge, measure the
amount of back lash between the oil
pump drive gear and driven gear.
Replace if the measured value is
beyond the limit(0.50~0.64mm).
EQM4009I
<Figure 4-9> Measuring gear back lash
Limit (mm) 0.025~0.089
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