Yanmar 3TNV82A-B Service Manual page 313

Trochoid Oil Pump
Figure 9-17
Record the measurement(s) and see Outer Rotor
Outside Clearance on page 9-6 for the service
limits.
Outer Rotor to Inner Rotor Tip Clearance
Inspect the tip clearance between the outer and
inner rotors. To inspect this, insert a feeler gauge
between the inner rotor tooth tip (Figure 9-18, (1))
and the outer rotor tooth tip (Figure 9-18, (2)), and
measure the clearance.
Figure 9-18
TNV DI Service Manual
Record the measurement(s) and see Outer Rotor
to Inner Rotor Tip Clearance on page 9-6 for the
(1) service limits.
Check Outer Rotor Side Clearance
Inspect the side clearance between the lubricating
oil pump body and the outer rotor. To measure the
side clearance, use a straight edge and feeler
gauge (as shown in Figure 9-19) or a depth
micrometer.
(2)
Record the measurement(s) and see Outer Rotor
Outside Clearance on page 9-6 for the service
limits.
(1)
Check Rotor Shaft Clearance
Inspect the rotor shaft clearance. Measure the
outside diameter of the rotor shaft
(Figure 9-20, (1)) and the inside diameter of the
cover.
Determine the clearance by subtracting the outside
diameter of the rotor from the inside diameter of the
(2)
cover.
LUBRICATION SYSTEM
Figure 9-19
9-15