Toyota 4-Runner 1985 Repair Manual page 284

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LUBRICATION SYSTEM - Oil Pump LU-5
LU0053
LU0054
6. REMOVE OIL PUMP DRIVE SPLINE AND a-RING
7. DISASSEMBLE OIL PUMP ASSEMBLY
(a) Unscrew the relief valve plug, and remove the spring
and the relief valve piston.
(b) Remove the drive and the driven gears.
INSPECTION OF OIL PUMP
1. MEASURE BODY CLEARANCE
Using a feeler gauge, measure the clearance between the
driven gear and body.
If the clearance is greater than the maximum, replace the
gear and/or body.
Maximum clearance: 0.2 mm (0.008 in.)
2. MEASURE TIP CLEARANCE
Using a feeler gauge, measure the clearance between both
gear tips and the crescent.
If the clearance is greater than the maximum, replace the
gears and/or body.
Maximum clearance: 0.3 mm (0.012 in.)
3. MEASURE SIDE CLEARANCE
Using a feeler gauge and a flat block, measure the side
clearance as shown.
If the clearance is greater than the maximum, replace the
gears and/or body.
Maximum clearance: 0.15 mm (0.0059 in.)