CHAPTER 6. REPAIR OF PUMP ASSEMBLY

CHAPTER 6

REPAIR OF PUMP ASSEMBLY

Section I. PUMP ASSEMBLY COMPONENTS

6-1. General

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

assembly.

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).

NOTE

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.

NOTE

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

CAUTION

casing (49) to the intermediate

housing (35).

If the original impeller (17) shaft

sleeve (23) seal plate (22) and

CAUTION

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

proper

impeller

spacing

the volute casing is allowed to sway

reassembly.

or turn during removal.

6-1