TM 10320-310-14
4-14. REPLACE DIFFUSER, IMPELLER, SHAFT SEAL, BACKHEAD AND STUB SHAFT
This task covers:
a.
Removal
c.
Inspection
b.
Cleaning
d.
Installation
INITIAL SETUP
Tools
Equipment
Condition
Tool Kit, General Mechanics Automotive
Para
Equipment Condition
(Item 1, Appendix B)
Puller (Item 2, Appendix B)
4-13
Quick disconnect coupling halves
Torque Wrench (Item 2, Appendix B)
and pump housing assembly removed.
Materials/Parts
General Safety Instructions
Dry cleaning solvent (Item 10, Appendix E)
Silicone (Item 2, Appendix E)
Well-ventilated area required during cleaning.
Lockwashers, preformed packing, shims
REMOVAL:
1
Disengage diffuser assembly (2) from impeller (4). Remove spring pin (1) only if damaged.
2
Hold impeller assembly (4) stationary and remove hexagon head cap screw (5) and impeller washer (6).
Unless impeller is corroded, it can be slipped off stub shaft (7) without force. Remove impeller assembly. Pull
key (8) from stub shaft (7).
3
Remove shims (9) if present, shaft seal assembly (10) parts noting their orientation and preformed packing
(11); discard preformed packing (11).
4-14
