17
©Godiva Ltd. Our policy is one of continuous development. We therefore reserve the right
to amend specifications without notice or obligation.
Press out the old oil seal towards the stepped face of the housing. Press in the new oil
seal in the opposite direction, making sure that the open end of the seal is towards the
stepped face of the housing.
To remove the oil seal from the impeller end of the bearing housing it is necessary to
remove the volute body (see Chapter 3), the impeller (Chapter 5), and the carbon seal,
undo the six nuts and washers which join the pump head to the bearing housing and
remove the pump head. The oil seal housing is now exposed and can be removed by
undoing the six bolts and washers which retain it. Press out the old oil seal towards the
flat face of the housing. Press in the new oil seal in the opposite direction making sure
that the open end of the seal is towards the stepped face side of the housing.
CHAPTER 11
DRIVE SHAFT BEARINGS
Removing & Refitting
To gain access to the drive shaft bearings the pump has to be dismantled by removing
the volute body, impeller, pump head, tachometer drive, and both oil seal housings, as
detailed in the previous chapter. The water ring primer can also be removed if necessary
(see Chapter 12). The shaft may then be tapped out towards the impeller end, with the
bearing and the tachometer gear piece. Should the bearing remain in the bearing housing
it should be tapped out with a soft drift.
The drive end bearing will remain in the housing after the shaft has been tapped out. It
can be removed by tapping with a soft drift.
To re-assemble, the impeller end bearing must first be pressed on to the shaft, ensuring
that it fits firmly against the shoulder on the shaft. The shaft and bearing assembly are
fitted into the bearing housing from the impeller end. Fit the tachometer gear piece to the
shaft by sliding on from the flange end.
The bearing at the drive end should now be fitted. The driving flange and slotted nut can
be fitted temporarily and used to draw the bearing into the housing.
When the bearing is fitted, remove the slotted nut and driving flange and refit the oil seal
housing at each end of the bearing housing, then refit the driving flange, washer, slotted
nut, and split pin.
Reassembly of the rest of the pump is a reversal of the dismantling procedure.
CHAPTER 12
WATER RING PRIMER
Removing & Refitting
To remove the water ring primer, slacken the hose clips on the rubber hose, disconnect
the primer return spring, remove the bolts and spring washers securing the primer fulcrum
shaft keep plate, slacken the locknuts and grubscrews in the primer pivot, then tap out
the primer fulcrum shaft.