Install The Hex Coupling Guard; Adjustable Wear Rings - Xylem G&L A-C 9100 Series Instruction Manual

6.9.3 Install the hex coupling guard

1. Slide the inner guard into the outer guard.
2. Spread the guards and place them over the coupling.
Do not spread the inner and outer guards more than necessary for guard installation,
as it can alter their fit and appearance.
3. Straddle the support bracket with the guards and install a capscrew through the hole
in the support bracket and guard located closest to the pump.
Do not tighten the capscrew.
4. Install the outer guard capscrews according to the directions in this table.
5. Position the outer guard so that there is less than 1/4 in. (0.64 cm) of exposed shaft.
6. Hold the guard in this position and tighten the three capscrews.
7. Open the isolation valves and inspect the pump for leaks.
8. Return the pump to service if it is not leaking.

6.9.4 Adjustable wear rings

Adjustable rings are an assembly of two threaded rings. The outer, stationary ring is held
in the casing by a flange and an anti-rotation pin in the lower half main joint. The inner,
adjustable ring can be moved axially, in either direction, by rotating it. The ring is held in
position by a stainless steel locking pin. All rings have clockwise threads.
Adjustment
When the clearance between the impeller wear face and the adjustable wearing ring
becomes excessive; For example, approximately .020" to .030".
1. Remove the upper half casing and pull the locking pin.
2. Rotate the inner rings clockwise to restore .005" to .008" clearance greater than shaft
end float between the ring and the impeller.
3. Drill a new hole in the inner ring for the locking pin. This is a blind hole, do not drill
through.
4. Replace the locking pin and upper half casing.
1. Sleeve
2. Impeller ring
3. Casing ring
G&L Pumps Series A-C 9100 Base Mounted Centrifugal Pumps INSTRUCTION MANUAL
If...
The pump has a motor saddle
support bracket
The pump does not have a motor
saddle support bracket
1 2 3
6 5 4
Then...
Ensure that the outer guard straddles the support arm and install the two
remaining capscrews.
Do not tighten the capscrews.
Insert the spacer washer between the holes located closest to the motor in
the outer guard and install the two remaining capscrews.
Do not tighten the capscrews.
6 Maintenance
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