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TM 5-4320-304-14
TM 08922A-14/1
4-13. REPLACE VOLUTE, IMPELLER, WEAR PLATE, SHAFT SEAL, AND
ADAPTER SHAFT (Continued)
INSTALLATION:
1
Install new shaft seal (15) on
adapter shaft (6). Install key
(16).
2
InstalI adapter shaft with
shaft seal into pump case
assembly (4).
3
Install new packing (14) in
pump case assembly (4).
4
Install wear plate (13) and
screws (12). Tighten screws
securely.
5
NOTE
If the same impeller and wear plate are reassembled and no
clearance change is indicated, make sure that the same
thickness of shims is used.
If a new impeller and/or wear plate is to be installed, or if the impeller clearance is to be changed,
determine the shim thickness required to obtain a clearance of 0.010 to 0.020 inch (0.254 to
0.508 mm) between the impeller and wear plate as follows:
a. Screw impeller (9) clockwise on shaft (6) without shims. Be sure that it is seated firmly against
the shaft shoulder. Secure impeller with lock washer (8) and screw (7).
b. Measure from the face of the impeller (9) to the face of the wear plate (13) using a feeler gage.
c. Select shims (10 and 11) to equal the dimension obtained less 0.010 to 0.020 inch (0.254 to
0.508 mm) for clearance.
Install impeller (9) lock washer (8), and screw (7). Tighten screw securely.
Install new packing (5) on volute (3). Install volute on pump case assembly (4).
Install washers (2) and nuts (1). Tighten nuts securely.
6
7
8
4-17
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