8. Lubrication system
154
8.2.4 Lube oil pump inspection
(1) Outside diameter clearance and side
clearance of outer rotor
Insert a gap gauge between the outer rotor and the gear
case cover, and measure outside diameter gap.
Put a ruler on the end face of the gear case cover, and
insert a gap gauge between rotor, and measure a side
gap.
(2) Tip clearance between outer rotor and inner
rotor
Insert a gap gage between an outer rotor and an inner
rotor, and measure the tip clearance.
(3) Side clearance
When measuring a side clearance, put a right-angle gage
to the pump body, insert a gap gage and measure the
clearance.
(4) Outside diameter clearance of inner rotor centering location part
Measure the outside diameter of inner rotor centering location part and the hole diameter of gear case
cover. Calculate the clearance from that difference.
8.2.5 Pressure control valve construction
The pressure control valve controls the oil pressure from the time the lube oil leaves the filter.
When the pressure of lube oil entering the cylinder body main gallery exceeds the standard, the control
valve piston opens the bypass hole and lube oil flows back into the oil pan.
Outside clearance
mm
Standard
Limit
0.12-0.21
0.30
Tip clearance
mm
Standard
Limit
-
0.16
Side clearance
mm
Standard
Limit
0.02-0.07
0.12
Inspection item
Standard
Limit
Gear case cover I.D.
46.13-46.18
-
Inner rotor O.D.
45.98-46.00
-
Rotor clearance
0.13-0.20
0.25
Standard oil pressure
0.29-0.44 MPa
(3.0-4.5 kgf/cm
2
)
(Outer diameter clearance)
Gear case
Outer rotor
Inner rotor
(Side clearance)
Outer rotor
