Isuzu 4LB1 - OIL PUMP

LUBRICATING SYSTEM
85
Inspection and replacement
When there is wear, damages or any other defects
found, repair or replace the rotor.
Plug
Spring
Relief valve
Common
Oil pump
(common)
Pin (common)
Rotor; outer
Roter; inner
O-ring (common)
Pump gear
Without PTO
Body; Oil pump
With PTO
Front plate
(Body; integral structure)
OIL PUMP
Clearance between the outer rotor or inner rotor and
the pump cover
mm (in.)
Clearance between the periphery of the outer rotor and
the pump body
mm (in.)
Clearance between the inner rotor and the outer rotor
mm (in.)
Standard Limit
0.040 – 0.085 (0.0016 – 0.0033) 0.15 (0.0059)
Standard Limit
0.10 – 0.185 (0.0039 – 0.0073) 0.4 (0.0157)
Standard Limit
0.17 (0.0067) 0.2 (0.0079)
Fig. 180