Perkins M92B, User Handbook Manual

Page: 33 / 64

N37347 Chapter 4
Page 25
How to check the impeller of the raw water pump
1. Ensure that the seacock is closed.
2. Release the six setscrews which fasten the end plate of the raw water pump and remove the plate.
When the end plate of the raw water pump is removed, some raw water will flow from the pump.
3. Remove the rubber end cap (H1) and then pull the impeller from the shaft.
4. Clean the contact surfaces of the pump body and the end plate.
5. Inspect the rubber impeller for excessive wear or for damage and renew it, if necessary. If pieces have
broken off the impeller blades, it is necessary to remove them from the system to avoid damage later. To do
this:
6. Remove the outlet hose from the raw water pump. Remove the end cap of the oil cooler for the reverse
gearbox.
7. Remove any debris and check that the open ends of the tubes in the oil cooler are clear of broken
pieces of impeller blades.
8. Fit the outlet hose to the raw water pump and the end cap to the oil cooler for the reverse gearbox and
tighten the hose clips. Replenish the coolant circuit .
9. Apply Spheerol SX2 grease or liquid soap to the blades of the impeller and fit the impeller into the
housing with the blades bent counter-clockwise (H). Fit the rubber end cap.
10. Apply POWERPART jointing compound, part number 1861117 to a new joint and fit it to the body with
the wide area of the joint over the eccentric plate in the body. Fit the end plate and tighten the end plate
screws.
11. Open the seacock.