REPAIR OF PUMP ASSEMBLY
Section I. PUMP ASSEMBLY COMPONENTS
c. Insert a piece of wood between any two ribs of
This section contains repair instructions for those items
the impeller (17) and strike the wood with a mallet in
which are considered components of the pump
such a manner as to turn the trailing edge of the
impeller blades counterclockwise. This will break the
contact between the thread in the impeller and the
6-2. Pump Assembly
thread of the impeller shaft (29).
a. Remove the pump assembly (para 5-6).
b. Remove the eight nuts (37, fig. 6-1) securing
The impeller shall be dynamically
the volute casing (49) to the intermediate housing (35).
balanced to a maximum out-of-
Remove the volute casing from the intermediate
balance condition of 0.25 inch-ounce
housing. Remove the volute gasket (21).
at 3600 RPM.
d. Unscrew and remove the impeller (17), the
On Model US36ACG, lockwashers are
spacer shims (18), and the shaft sleeve (23) with the
used with the eight nuts (37) and
seal rotary elements (19) from the impeller shaft (29).
washer (36) that secure the volute
casing (49) to the intermediate
If the original impeller (17) shaft
sleeve (23) seal plate (22) and
impeller shaft (29) are to be used on
Carefully maintain alignment when
reassembly, use of the original
separating the volute casing (49)
spacer shims (18) in the same
from the intermediate housing (35).
quantity and thickness will assure
Damage to the impeller will result in
the volute casing is allowed to sway
or turn during removal.