Xylem AC8584C Series HSCS Base Mounted Centrifugal Pumps User Manual

Page 28

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To install the oil ring, place the oil ring in the bearing housing

directly under the pipe plug hole. Run a wire through the pipe

plug hole, around the oil ring and back through the pipe plug

hole once again. Tie the wire to a metal washer (being a larger

diameter then the hole) causing the oil ring to become tight

against the inside top of the bearing housing. Then assemble

the bearing housing over the bearing. Untie the wire and the

oil ring will drop down onto the shaft. Check the position of

the oil ring through the pipe plug hole at the top of the bearing

housing. The oil ring must be resting on the shaft for correct

operation. A screwdriver can be used to correct the oil ring

position, if required.

The following steps describe how to change the oil for oil

lubricated bearings. Figure 27 shows a typical oiler assembly.

1. Remove the vent assembly from the top of the bearing

housing.

2. Remove the pipe plug from the bottom of the bearing

housing.

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 of filtered mineral oil.

Refer to oil lubrication instructions given previously in this

manual for type of oil.

NOTE: Y

ou must fill through Trico reservoir.

7. Place thumb over reservoir spout, invert and place reser-

voir on lower casting while removing thumb. Allow reser-

voir 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.

Aperiodic filling of the reservoir is required. When the oil

becomes dirty, repeat steps 1 through 8.

LIMITED END FLOA

T 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 (See

Figure 28).

Most HSCS pumps installations use the all metal, gear type

coupling. Where limited end float gear type couplings are

used, the coupling hubs are slip-fit onto the pump and motor

shafts. After installation of the coupling covers and hubs; with

the motor set on its Magnetic Center, butt the pump and

motor shafts with the phenolic disc inserted between them.

(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 prop

erly.

Once the above instructions have been followed out com-

pletely, the

Alignment Pr

ocedures

starting on page 6 should

be followed.

FIGURE 28 – LIMITED END FLOA

COUPLING ARRANGEMENT

COVER

HUB

MOTOR SHAFT

PUMP SHAFT

PHENOLIC DISC

FIGURE 27 – OILER ASSEMBLY

RESERVOIR

LOWER

CASTING

VENT

ASSEMBLY

BEARING

HOUSING

PIPE

PLUG