Disassemble The Pump With Mechanical Seals On Shaft Sleeve - Xylem G&L A-C 8100 Series Instruction Manual

6 Maintenance
11.Remove the two casing rings (3–003–9) from the impeller (4–002–0) and remove o-ring
(3–914–9) and locating pin (3–943–9) from each casing ring.
12.Remove the mechanical seal head (3–402–0) from the pump shaft.
13.Remove the impeller retaining ring (3–915–1) with retaining ring pliers. Heat the
impeller hub on both ends to 350°F maximum, and pull or push the impeller from the
shaft.
For impellers with replaceable rings, remove the rings by cutting rings with a cold
chisel.

6.6.5 Disassemble the pump with mechanical seals on shaft sleeve

1. Close valves on suction and discharge sides of the pump.
If no valves have been installed, it will be necessary to drain the system.
2. Remove coupling guard and disconnect coupling.
Refer to instructions on how to remove the hex coupling guard.
a) Remove external tubing (1–939–9), if supplied.
3. Loosen but do not remove main joint capscrews (2–904–1 and 2–904–2). Insert a
screwdriver or pry bar into the slots between the upper and lower casing halves —
separate joint.
4. Remove all casing main joint capscrews and dowels (2–916–1). Lift off the upper casing
half.
5. Tap the stuffing boxes with a soft-headed hammer to break the seal between the
stuffing box and lower casing half, and lift the rotating element out of the lower casing.
A spare rotating element can be installed at this point.
6. Remove the four capscrews (3–904–9) from each bearing housing (3–025–3 and 3–025–
4) and remove the bearing housings from the shaft.
34 G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL