TM 10-4930-351-14
0110 00
DISASSEMBLY Continued
NOTE
The check valve seat is a tight fit but can be removed by hand. It is not secured by any type of fastener.
4.
Remove the inner pin (12) and the check valve seat (13). Inspect the check valve seat (13) for damage. Replace if
damaged or otherwise unfit for use.
5.
Remove and discard O-ring (14) from check valve seat (13).
6.
Mark the bearing housing assembly (15) and diffuser case (4) for reassembly. Remove the eight hex head screws (16)
and flat washers (17) that secure the bearing housing assembly (15) to the diffuser case (4). Pull the bearing housing
assembly (15) from the diffuser case (4).
7.
Remove and discard O-rings (18) and (19).
8.
Remove the six screws (20) and flat washers (21) that secure the shaft seal cap (22) to the bearing housing assembly
(15). Remove the shaft seal cap (22).
9.
Remove retainer ring (23) from shaft seal cap (22).
10. Push rotary seal (24) out of shaft seal cap (22).
11. Remove and discard O-ring (25).
12. With a 1-5/8" wrench across retainer (26) flats and a strap wrench on impeller (27), turn shaft (28) until end of retaining
wire (29) is visible on face of retainer (26). Continue turning until retaining wire (29) is forced out of its groove and
begins to feed itself outside retainer (26). (It may be helpful to lift end of retaining wire (29) with a small screwdriver.)
Continue turning until hidden end of retaining wire (29) detaches from anchor hole in shaft (28). Remove retainer (26)
and retaining wire (29).
13. Install flex coupling and key on keyed end of shaft (28).
14. Hold flex coupling with strap wrench and loosen shaft nut (30) and flat washer (31).
15. Remove flex coupling and key from shaft (28).
16. Remove shaft nut (30), flat washer (31), impeller (27), and pin (32).
17. Remove the six socket head screws (33) and flat washers (34) that secure the inlet port plate (35).
18. Remove the drive sleeve (36) and rotor pin (37).
19. Remove the rotary vane pump (38) as an assembly. To prevent loss, do not remove index pins (54).
20. The inlet port plate (35), discharge port plate (39) and cam ring (40) are held together by pin (41). Rotate inlet port plate
(35) around pin (41) to expose rotor vanes (42) and rotor (43). Remove and discard rotor vanes (42) from rotor (43).
21. Examine all parts of the rotary vane pump (38) for damage. Replace if required.
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