Seawater Pump Inspection - Yanmar 3YM30 Service Manual

9.2.3 Seawater pump Inspection

(Refer to 2.2.4(5).)
(1) Inspect the rubber impeller, checking for splitting around the outside, damage or
cracks, and replace if necessary.
Retaining ring
Ball bearing
Retaining ring
(2) Inspect the oil seal and replace if it is damaged. Also replace the oil seal if there is
considerable water leakage during operation.
Cooling water leakage
(3) Make sure the ball bearings rotate smoothly. Replace if there is excessive play.
V-pulley
Spacer
Ball bearing
Plate
O-ring
Oil seal
(Seawater pump)
less than 3 cm
Pump body
3
/h
160
9. Cooling water system
Shaft
O-ring
Cover