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 TM 55-1905-242-14
0174 00
DISASSEMBLY (continued)
! CAUTION
One shaft sleeve is right hand thread, the other is left hand thread. The shaft sleeves
must be turned in the correct direction when removing and installing them to prevent
damage to the shaft and shaft sleeves.
12. Mark the impeller (12) location in relation to the pump shaft (13) and remove by unscrewing the shaft sleeves (27). One
shaft sleeve is right-hand thread, the other is left-hand thread.
13. If the impeller wear rings (28) will be replaced, remove all 12 set screws (29) and chisel the impeller wear rings from the
impeller (12).
ASSEMBLY
1.
If removed, press the impeller wear rings (28) onto the impeller (12), ensuring that they are fully and evenly seated.
Secure the impeller wear rings with the 12 set screws (29).
2.
Position the impeller key (30) on the pump shaft (13).
3.
Slide the impeller (12) onto the pump shaft (13), centering the impeller between the shaft threads. Use the match marks
from step 12 of Disassembly as a guide.
4.
Slide the shaft sleeve gaskets (31) over the pump shaft (13) and place one gasket against each side of the impeller (12).
5.
Thread the shaft sleeves (27) onto the pump shaft (13), but do not draw them up to the impeller (12) yet.
6.
Place the lantern rings (26) and deflectors (23) on the pump shaft (13).
7.
Slide the bearings (21 and 22) into the bearing housings (19 and 20). Press only on the outer race, if required.
8.
Place the bearing housings (19 and 20) on the pump shaft (13). Press only on the inner bearing race if required.
9.
Place the bearing lockwasher (17) on the pump shaft (13) and secure the bearing housing (19 and 20) in place with the
bearing locknut (18).
10. Press the bearing dust cover (32) into the bearing cover (33).
11. Place the bearing covers (33 and 34) on the bearing housings (19 and 20) and secure with the bolts (35). Ensure that the
grease fitting (36) matches the dowel pin (37) hole in the bearing housing.
12. Position the case wearing rings (24) on the impeller (12) and lower the impeller/pump shaft (13) assembly into the lower
half casing (38). Ensure that the tongue on the wear ring matches the slot in the lower casing.
13. Match the bearing caps (10 and 11) to the match marks from step 4 of Disassembly as a guide on the casing and position
them on the dowel pins (37) that extend from the bearing housings. Secure the bearing caps with the bearing cap bolts
(9).
14. Position the impeller (12) in the center of the lower half casing (38) and tighten both shaft sleeves (27) against the
impeller.
15. Position the parting gasket (8) on the lower half casing (38).
16. Inspect the inside of both casing halves and remove all foreign objects. Then carefully lower the upper half casing (7)
onto the dowel pin (39).
0174 00-3
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