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LUBRICATION - OIL PUMP
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 does not, replace the relief valve. If necessary, replace the
oil pump assembly.
2. INSPECT ROTOR SIDE CLEARANCE
Using a feeler gauge and precision straight edge, measure the
clearance between the rotors and precision straight edge.
Standard side clearance:
0.03 - 0.09 mm (0.0012 - 0.0035 in.)
Maximum side clearance:
0.15 mm (0.0059 in.)
If the side clearance is greater than maximum, replace the ro-
B09330 tors as a set. If necessary, replace the oil pump assembly.
3. INSPECT ROTOR TIP CLEARANCE
Using a feeler gauge, measure the clearance between the drive
and driven rotor tips.
Standard tip clearance:
0.060 - 0.180 mm (0.0024 - 0.0071 in.)
Maximum tip clearance:
0.28 mm (0.0110 in.)
If the tip clearance is greater than maximum, replace the rotors
B09331 as a set.
4. INSPECT ROTOR BODY CLEARANCE
Using a feeler gauge, measure the clearance between the driv-
en rotor and body.
Standard body clearance:
0.250 - 0.325 mm (0.00984 - 0.01280 in.)
Maximum body clearance:
0.425 mm (0.01673 in.)
If the body clearance is greater than maximum, replace the ro-
B09332 tors as a set. If necessary, replace the oil pump assembly.
2002 ECHO (RM884U)
Author : Date : 813
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