Instruction 2111.80B 04/05 14
SECTION V. REPAIRS
A. IF PUMP REQUIRES CLEANING:
Removable handhole covers are provided on the pump volute (22). To clean pump, disengage disconnect switch, lock
out, close all valves, drain the pumps, remove cleanout cover (55), and remove any solids.
B. TO DISASSEMBLE THE PUMP:
1. Open the electric circuit, lock disconnect switch in "Off' position, close all gate valves on suction, discharge and
water seal lines. Drain the pump of water by removing the casing drain plug (16B).
2. Disconnect water seal, vent, grease and drip pocket lines, when present, from the pump.
3. Plug vent line going back to wetwell.
4. Disconnect the bottom end of the lowest shaft section at the pump coupling flange. (See fig. 1.) The bottom or
"A" section of universal joint shafting is easily swung aside to permit pump removal. Where more than one shaft
section is used, the remaining sections need not be disturbed.
5. Remove power frame nuts (25) separating upper pump assembly from discharge casing (22). Where
applicable also remove capscrews and washers (82).
6. Hoist or lift upper pump assembly from discharge casing.
7. Remove impeller locknut (19). If impeller cannot be re moved easily, warm the impeller near the shaft with a
torch. Pry the impeller carefully and evenly with two large screws on opposite sides of the backplate. Care should be
exercised in prying so as not to bend the shaft. Though prying without heating is possible, it is recommended that heat be
applied to prevent enlarging the impeller bore. Remove the impeller key.
8. Remove backplate (26) from upper pump assembly. Loosen gland nuts (13), remove packing gland (32) and pick
out packing rings (30) and lantern ring (29) carefully noting the number of packing rings used above and below the
lantern ring.
9. Remove water slinger (12) and coupling key (1) from shaft.
10. To dismantle the power frame assembly:
a. No. 1 power frame
i. Remove the 2 capscrews and washers (37) that are threaded into the power frame (8).
ii. Tighten jackscrews (3), in equal increments, to remove shaft assembly from power frame. It will be
necessary to use longer jackscrews than those provided for impeller adjustment to facilitate complete
removal of the bearing retainer (36) from the power frame.
iii. After the bearing retainer is completely out of the power frame, lift the shaft assembly by the threaded hole in
the motor end of the shaft.
iv. Remove snap ring (35) from bearing retainer.
v. Remove bearing retainer from shaft assembly.
vi. Remove bearing locknut and washer (6) and bearing (7).
vii. Remove snap ring (10) from shaft and remove bearing (9).
viii. Clean all parts in kerosene and remove all burrs from machined surfaces before reassembling pump. Keep
ball bearings wrapped in clean, lintless cloth at all times when not in pump. When replacing bearings on shaft, pack
clean bearing grease into the bearings with fingers (be sure fingers are free of dirt and / or grit). DO NOT
USE A HAMMER TO REMOVE SHAFT ASSEMBLY.
b. No. 2 power frame with two-piece bearing retainer.
i. Remove the 2 capscrews and washers (37) that are threaded into the power frame (8).
ii. Remove shaft assembly from power frame by tightening jackscrews (3), in equal increments. It will be
necessary to use longer jackscrews than those provided for impeller adjustment to facilitate complete
removal of the shaft assembly
iii. After the bearing retainer sleeve (85) is completely out of the power frame, lift the shaft assembly by the
threaded hole in the motor end of the shaft.
iv. Remove capscrews (86) from bearing retainer (84).
v. Remove bearing locknut and washer (6) from shaft.
vi. Remove bearing set (7) and bearing retainer sleeve as a unit from shaft. Bearing puller should bear on
inner race of the bearing set.
vii. Pull bearing set out of bearing retainer sleeve.
viii. Remove snap ring (10) from shaft and remove bearing (9). Bearing puller should bear on inner race of
the bearing.
ix. Clean all part in kerosene and remove all burrs from machined surfaces before reassembling pump. Keep
ball bearings wrapped in clean, lintless cloth at all times when not in pump. When replacing bearings on
shaft, pack clean bearing grease into the bearings with fingers (be sure fingers are free of dirt and/or grit). DO
NOT USE A HAMMER TO REMOVE SHAFT ASSEMBLY.
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