COOLING SYSTEM 21
Coolant pump - gear driven
Identification of the coolant pump is by the last four
digits of the part number stamped on the front of
the pump body.
To remove and to fit21A-02A
To remove
1 Drain the cooling system and disconnect the
hose at the inlet connection of the coolant pump.
2 Release the setscrews from the flange of the
coolant by-pass.
3 Release the three setscrews which retain the
coolant pump to the cover of the timing case - two
from the front and one from the rear.
4 Release the nuts from the rear face of the timing
case, which fasten the pump to the timing case,
and remove the coolant pump (A). Ensure that the
"O" ring (A1) on the cover of the timing case is not
lost.
Note: Most of the latest coolant pumps use
setscrews instead of studs.
To fit
1 Check the "O" rings on the pump body (A2) and
on the cover of the timing case (A1) for damage. If
either of the "O" rings are damaged, they must be
renewed. Ensure that all joint faces are clean.
2 Check the drive gear of the coolant pump for
wear or other damage. If the gear is damaged, it
must be renewed.
3 Lightly lubricate the "O" ring on the pump body
with clean engine lubricating oil. Fit the pump to the
timing case cover with its gear in mesh with the
gear of the fuel injection pump. The pump is a tight
fit in the cover, but can be pulled into position if the
nuts for the pump studs are gradually and evenly
tightened. Ensure that the "O" ring in the cover
remains in position while the pump is fitted.
Note: Most of the latest coolant pumps use
setscrews instead of studs. The setscrews have a
sealant applied to the threads by the manufacturer.
If the original setscrews are to be used again, the
threads of the setscrews and the threads in which
they will be engaged must be cleaned. A suitable
sealant must then be applied to the threads of the
setscrews.
4 Fit and tighten the three setscrews which retain
the pump to the cover of the timing case - two from
the front and one from the rear.
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5 Fit a new joint to the flange of the coolant by-
pass. Fit the by-pass and tighten the setscrews.
6 Connect the hose to the inlet connection of the
coolant pump and fill the cooling system. Operate
the engine and check for leakage.
Perkins Phaser/1000 Series, April 1995 21A.05
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