Crane PROSSER 4NX07 Series, Installation And Operation Manual

10

F-3.2) Reassembly:
Bearing 

- When replacing bearing, be careful not to damage 

the rotor or shaft threads. Clean the shaft thoroughly. Slide 
conduit bushing (16) and washers (25), (33) over motor shaft. 
Apply adhesive compound to the shaft and press bearing 
(21) on the motor shaft, position squarely onto shaft applying 
force to the inner race of the bearing only, until bearing seats 
against shoulder of the shaft.

Seal -

 Clean and oil seal cavity in lower end bell (10). Press 

stationary member (1a) fi rmly into lower end bell (10), using a 
seal pusher (see parts list - seal tool kit), nothing but the seal 
pusher is to come in contact with seal face (see Figure 4). 
Make sure the stationary member is in straight.

IMPORTANT ! - DO NOT hammer on the seal 
pusher- it will damage the seal face.

Slide retaining ring (1d) over shaft and let rest on bearing 
(21). Place spring (1c) over shaft and let rest on retaining ring 
(1d). Lightly oil 

(DO NOT use grease)

 shaft, bullet and inner 

surface of bellows on rotating member (1b), (see Figure 5), 
with lapped surface of rotating member (1b) facing outward, 
slide over bullet and onto shaft using seal pusher, making 
sure spring (1c) is seated in retaining ring (1d) and spring (1c) 
is lined up on rotating member (1b) and not cocked or resting 
on bellows tail.

IMPORTANT ! - It is extremely important  to keep 
seal faces clean during assembly.  Dirt particles 
lodged between these faces will cause the seal to 
leak.

Motor - Slide motor rotor with conduit bushing (16), washers 
(25), (33) bearing (21) and seal parts (1b, c, d) into lower 
end bell (10) until bearing (21) seats in lower end bell (10). 
Center washers (25), (33) on bearing (21) and tighten conduit 
bushing (16) on lower end bell (10).

Lower motor stator over rotor until seated in lower end bell 
(10), while aligning holes for motor bolts. Insert motor bolts 
and torque to 17 inch pounds. If pump is a single phase unit 
place bracket (17) on one of the motor bolts. Insert capacitor 
(18) in bracket (17), attach motor leads with fl ag terminals to 
capacitor and place terminal boot (15) over terminals.

Set motor housing (11) next to motor (14) and lower end bell 
(10) assembly. Make wire connections per paragraph F-3.3. 
Set square ring (23) in groove on lower end bell (10) and 
lower motor housing (11) down onto lower end bell (10) while 
aligning holes. Place socket head cap screws (36) through 
lower end bell (10) into motor housing (11) and torque to 60 
inch pounds. Assemble impeller and volute per paragraph F-
2.2. 

Stationary Member (1A)  
Polished Face Out

Lower End Bell (10) 

Seal Pusher

FIGURE 4

Rotating Member (1D)

Bullet

Motor 

Seal Pusher

Stationary

FIGURE 3

SEAL ASSEMBLY (1)

RETAINING RING (1D)

LOWER END BELL (10)

SPRING (1C)

ROTATING MEMBER (1B)

STATIONARY (1A)

CONDUIT BUSHING (16)

WASHER (25) & (33)

SPACER (32) and
SHIMS (39) & (40)

EXCLUSION SEAL (31)

MOTOR END

(INBOARD END)

PUMP END

(OUTBOARD END)

FIGURE 5

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