Limited End Float Coupling; Assembly References - Xylem G&L A-C 9100 Series Instruction Manual

3. Unscrew the reservoir and remove.
4. Flush the oiler and bearing housing with a light grade of oil. Flush until all foreign
particles have been removed.
5. Screw the pipe plug and vent assembly back into place.
6. Fill the reservoir with a good grade filtered mineral oil.
Refer to oil lubrication instructions given previously in this manual for type of oil.
NOTE: You must fill through Trico reservoir.
7. Place thumb over reservoir spout, invert and place reservoir on lower casting while
removing thumb. Allow reservoir to empty, filling the bearing housing.
Several fillings of the reservoir may be required before the actual level is reached. No
more oil will run out of the reservoir.
8. When reservoir stays full, screw reservoir back into lower casting.
A periodic filling of the reservoir is required. When the oil becomes dirty, repeat steps 1
through 8.

6.9.7 Limited end float coupling

For units with drivers having sleeve bearings, the coupling halves are set to limited total
shaft axial movement to less than one-half of the motor rotor assembly end float. This is
accomplished by inserting a phenolic disc, or equivalent, of a specified thickness between
the motor and pump shaft.
5
1. Cover
2. Phenolic disc
3. Pump shaft
4. Motor shaft
5. Hub
Figure 26: Limited end float coupling arrangement
For pump installations that use limited end float gear type couplings:
1. Slip fit the coupling hubs onto the pump and motor shafts.
2. Install the coupling covers and hubs.
3. With the motor set on its Magnetic Center, butt the pump and motor shafts with the
phenolic disc inserted between them.
Once the above instructions have been followed out copletely, the Alignment Procedures
should be followed.

6.9.8 Assembly references

6.9.8.1 Ordering parts
The pumps covered by this manual have been designed and built with certain
replaceable wearing parts. The recommended inventory of spare parts depends upon the
installation and the importance of continued operation.
For critical service requiring a minimum of "down time" a complete or "quick change"
rotating element is recommended.
G&L Pumps Series A-C 9100 Base Mounted Centrifugal Pumps INSTRUCTION MANUAL
1 2
4 3
– The pump thrust bearing limits end float towards the motor.
– The thrust bearing of the pump is large enough to carry any magnetic thrust
developed by the motor when aligned properly.
6 Maintenance
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