Man D 2842 LE 620, Repair Manual

Page: 44 / 180

1
2
Removing and installing coolant pump
42
Note:
Exchange or repair coolant pump only if it has been found to be leaky.
The design of the coolant pump mechanical cassette seal permits small amounts of coolant to
pass through it. This coolant passing through results in a trace of drained coolant below the drain
bore. The coolant pump need not be exchanged or repaired because of this trace of permeating
coolant.
For this reason before exchanging or repairing a coolant pump ascertain
D
whether the cooling circuit shows visible and recurring signs of coolant loss; if yes
D
whether the coolant loss is caused by spillage from the expansion tank (e.g. too full) or by
other leakages from hoses, radiator etc.
Coolant pumps must be exchanged only if coolant drips visibly while the engine is in operation or
after the engine has been switched off.
Removing coolant pump
D
Draining off coolant, see page 40
D
Remove the thermostats, see page 41
Fig. 1
Take V-belt off coolant pump, see page 132
Fig. 2
Remove the mounting bolts from coolant pump
Take off coolant pump and delivery start indicator