Volvo Penta TAMD74A, Operator'S Manual

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Maintenance: Seawater system
Impeller. Check/Change
WARNING! Risk of water entering. Close the
seawater cock before starting work on the sea-
water system.
In some installations, it can be easier to first remove
the sea water pump from the engine (see next chap-
ter) and then change the impeller.
1. Remove the end cover of the pump. Pull and twist
out the impeller with adjustable pliers.
2. Inspect the impeller. Change the impeller if there
are any visible cracks or other defects.
3. Clean the inside of the housing. Lubricate the
pump housing and the inside of the cover with a
water-resistant grease (that is not aggressive on
rubber).
4. Press in the impeller while rotating it (clockwise).
5. Fit the cover with a new gasket.
6. Open the seawater cock.
IMPORTANT! Always carry a spare impeller
and gasket.
Sea water pump. Removal and assembly
WARNING! Risk of water entry. Close the sea
cocks before doing any work on the sea water
system.
1. Drain the water from the sea water system (please
refer to previous page).
2. Undo the coolant pipes to and from the pump and
remove the stay (1) on the TAMD74.
3. Remove the pump from the timing housing.
4. Check that the O-ring is undamaged and that it is
correctly located on the pump.
5. Install the pump, tighten it and install the stay (1)
on the TAMD74.
6. Grease the seal rings and install the coolant pipes
to and from the pump.
7. TAMD74: Check that seal (2) seals correctly
against the charge air cooler.
2
1