|
| |
TM 10-4320-348-14
(5)Inspect impeller for damage or wear.
(6)Inspect wear plate for damage or wear.
c. Service.
WARNING
When using compressed air, always use chip guards and wear eye protection.
(1)Clean all flow passages of volute cover.
(2)Blow out difficult to reach areas, inside of volute cover and pump casing, with compressed air, if necessary, to
remove deposits.
d. Installation. (Refer to Figure 5-3).
(1)Assemble stationary seat (11) into rubber boot (12) and install into pump casting (13).
(2)Slide shaft adapter (7) into pump casing (13), lining up the keyway and slot in the shaft adapter (7), until it is
settled.
CAUTION
Insure that the stationary seat is installed with the polished surface facing the impeller.
(3)Install rotary seal assembly (6) onto shaft adapter (7).
NOTE
When replacing seal, also replace volute O-ring (refer to Item 7, Figure 5-2), wear plate O-ring (8,
Figure 5-3), and four self-sealing screws (6, Figure 5-4).
(4)It a new impeller and/or wear plate is installed or it the impeller clearance is to be changed, determine the shim
thickness required to obtain a clearance of 0.010 to 0.015 inch (0.254 to 0.381 mm) by the following
procedure:
(a)Screw impeller (3) clockwise onto shaft adapter (9) without shims (4). Be sure that the impeller is seated firmly
against the shaft shoulder. Secure the impeller with teflon washer (2) and hex bolt (1).
(b)Measure from the face of the impeller to the face of the wear plate with feeler gauge. Clearance should be 0.010
to 0.015 inch (0.254 to 0.381 mm).
(c)Shims (4) are 0.010 inch (0.254 mm) thick and 0.005 inch (0.127 mm) thick. Add any combination of shims to
obtain proper clearance.
(5)Install shims (5) onto shaft adapter (7).
(6)Install wear plate (8) to pump casing (13), securing using two screws (9).
(7)Install new o-rings (10).
5-7
|
