TM 5-4320-300-14
5-21. IMPELLER, SHAFT, SEALS, AND CHECK VALVE (CONT)
Location/Item
Action
Remarks
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.
Install impeller on shaft without shims. Be sure that it is seated firmly
against the shaft shoulder.
b.
Install volute with wear plate assembled, and secure with attaching
bolts and lockwashers.
c.
Measure from the face of the impeller to the face of the wear plate
using a feeler gage.
d.
Select shims to equal the dimension obtained less 0.010 to 0.020 inc h
(0.254 to 0.508 mm) for clearance.
23. Impeller
Put Woodruff key into slot in shaft and install
impeller. Install and tighten locking cone.
24. Volute and
Fasten wear plate to volute with countersunk
wear plate
screws. Install on seal plate with bolts. Tighten
securely. Install new volute gasket on outside of
volute.
25. Bearing
Install on pump body. Install mounting nuts and
housing
lockwashers, and tighten securely.
26. Valve seat and
Install on suction flange.
check valve
assembly
27. Suction port
Install new gasket, companion flange, and mount-
companion
ing nuts. Tighten nuts securely in an alternating
flange
pattern.
5-87
