Installation, Operation and Maintenance Manual
CD, HL & NC Ranges of Dri-Prime
®
Pumps
95-0019-0000 Iss 11
29
Pump types
CD75
BB Units
CD80M/ CD100M/ CD150M/ CD200M
MA & BB Units
NC80/ NC100/ NC150
CD103M
MA
Units
1)
Heat both inner bearing races. Once up to temperature, slide them up hard against the shaft shoulders and hold in
position for a minimum of 30 seconds. This allows the races to grip the shaft and prevent them from creeping away
from the shoulder during cooling. Let the assembly cool completely.
2)
Fill the annular space between the bearing inner races with grease and lightly grease the bearing rollers and the
raceways of the inner races to ensure seating.
3)
Motor Adaptor units
: - If the pump end bearing cover and circlip have been removed, refit these parts ensuring that,
after initial fitting, the bearing cover is pressed hard back against the retaining circlip to prevent excess play in the final
bearing assembly. Do not fit lip seal to cover.
Bearing bracket units
: - Fit the pump end bearing cover. Do not fit lip seal.
4)
Fit the pump end bearing outer into the housing ensuring it is pressed hard up against the bearing cover.
Bearing bracket units
: - Lock into position with grub screw.
5)
Position the motor adaptor/bearing bracket with the shaft axis vertical (pump end down). Lower the shaft/bearing inner
assembly into position.
6)
Press the drive end bearing outer into the housing until it just meets the inner race.
7)
Fit the drive end bearing cap (without lip seal) and hand tighten the retaining screws. Rotate the shaft assembly – by
hand – about a dozen times to ensure free movement.
8)
Using a dial indicator located against the end face of the drive end of the shaft, measure the end float of the shaft. Add
shims under the drive end bearing cover to achieve the end float given in the Technical Data section. Rotate the shaft
assembly by hand several times and check the end float again. Adjust as necessary.
9)
Remove drive end bearing cover and shims.
10) Grease the motor adaptor/bearing bracket assembly using the external grease nipple until a continuous ring of grease
is witnessed emerging through both bearings.
11) Grease the drive end lip seal and press it into the drive-end bearing cover (seal lip facing in). Add a small amount of
grease to the internal cavity of the cover and refit.
12)
Motor adaptor units
: - Grease the bearing cover pump end lip seal and press it into the pump end bearing cover (seal
lip facing in).
Bearing bracket units
: - Remove pump end bearing cover and press both lip seals into place (seal lip facing out at each
end). Add a small amount of grease to the internal cavity of the cover and refit.
13) Check that the assembly rotates freely.
14)
Motor adaptor units
: - Grease the pump end lip seal and fit (lip facing out) to the shaft collar starting at the small end of
the collar and finishing about 5mm from the large end. Press the shaft collar into place at the pump end. The lip seal
will remain slightly proud. Press the lip seal home flush with the inner face of the casting.
