A311-03-880 Issue A
Page 20
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Installation
3.7.1
Fitting the bell-housing, coupling and motor
Ensure that you have all the necessary parts and tools available before commencing this task.
Ensure that all components are clean and free from any dirt and debris.
It is recommended that you check the fit of the bell-housing flanges to the pump and (separately) to the motor before
proceeding to the full installation. This may be done by taking suitable measurements or by physically offering the
bell-housing to the pump and to the motor. Note that the square flange of the bell-housing fits to the pump and the
round flange fits to the motor.
If fitted and after isolating the supply and draining, remove the cooling water inlet and outlet pipes and fittings from
the mechanical seal housing.
Remove the two guards from the bell-housing.
Note that one of the four fixing holes on the square flange of the bell-housing is offset from the pitch circle diameter
of the other three holes, and lightly mark the position of this hole. Lightly mark the matching threaded offset fixing
hole on the pump and ensure that these two are aligned with each other by rotating the bell-housing to the correct
orientation. Check that one of the cut-outs in the square flange aligns with the position of the vertical supply pipe
from the oil reservoir to the mechanical seal housing.
Fit the two centering pieces to the pump, one in the previously marked offset hole and the other to the diametrically
opposite mounting hole. Fit the bell-housing to the pump using the M16 bolts, washers and spring washers provided.
Ensure that the centering pieces fully locate in the mating holes in the flange.
Tighten the fixing bolts to a torque of 100 Nm (74 lbf ft).
Fit the cooling water inlet and outlet fittings and pipes to the mechanical seal housing. Note that these fit through
two of the 32 mm diameter holes in the cylindrical section of the bell-housing. It is recommended that, at this stage
of the assembly, you test these fittings to ensure that they are leak tight.
and
. Note that one of the hubs of the coupling has been bored to suit the pump drive shaft
diameter and the other to suit the motor shaft diameter. Check that the fixing set screws are in position in the
coupling hubs and that they do not protrude into the hub bores.
Fit the shaft key to the pump drive shaft and slide the appropriate coupling hub onto the shaft ensuring that it locates
on the key. Do not fix the coupling hub in position at this time. Slide the outer holding ring of the coupling over the
coupling hub.
Fit the shaft key to the motor shaft and slide the other coupling hub onto the shaft ensuring that it locates on the
key. Lightly tighten the hub fixing set screw so that the hub does not fall off the shaft during the following operations.
Using suitable lifting gear, fix the motor to the bell-housing which has previously been fixed to the pump.
Ensure that the protruding annular ring on the motor flange locates correctly and fully into the matching recess on
the bell-housing flange. Secure the motor to the bell housing using the nuts, bolts, washers and spring washers
supplied. Tighten the bolts to 150 Nm (110 lbf ft).
Working through the access ports in the bell-housing, loosen the coupling hub fitted to the motor shaft. Slide the two
coupling hubs on their shafts to a position where the teeth on the two hubs are separated by 2.5 mm ±1 mm and each
hub is equidistantly positioned relative to the end of the shaft on which it is mounted.
WARNING
Note that the motors weigh in excess of 100 kg. They must only be lifted using appropriate lifting
gear in accordance with any local and national regulations.
WARNING
Note that the bell-housing weighs approximately 20 kg. It must only be lifted in accordance with
any local and national regulations.
