Oil Pump Disassembly; Oil Pump Inspection - Toyota 1HD-FT Repair Manual

ENGINE - LUBRICATION SYSTEM
EG·'99
OIL PUMP DISASSEMBLY
1.
REMOVE DRIVEN ROTOR
2. REMOVE RELIEF VALVE
Remove the plug, gasket. spring and relief valve.
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OIL PUMP INSPECTION
1. INSPECT RELIEF VALVE
Coat the valve with engine oil and check that it falls
smoothly into the valve hole by its own weight.
If it doesn't. replace the relief valve. If necessary.
replace the oil pump assembly.
2. INSPECT DRIVE SHAFT
Turn the gear, and check that the drive shaft moves
smoothly and quietly.
If
necessary.
replace the oil pump assembly.
3. INSPECT DRIVE AND DRIVEN ROTORS
A. Inspect rotor tip clearance
Using a feeler gauge, measure the clearance between
the drive and driven rotor tips.
Standard tip clea,ance:
0.080 - 0.160 mm (0.0031 - 0.0063 in.)
Maximum
tip
cI8.,anc8:
0.21
mm
(0.0083
in.)
If the tip clearance is greater than maximum. replace
the oil pump assembly.
B. Inspect rotor body clearance
Using a feeler gauge. measure the clearance between
the driven rotor and body.
Standard body clearance:
0.100 - 0.170 mm (0.0039 - 0.0067 in.)
Maximum body clearance:
0.20 mm (0.0079 in.)
If the body clearance is greater than maXimum, re-
place the oil pump assembly.