Crane 104872, Installation And Operation Manual

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F-3.2) Reassembly:

Inner Seal (DS Units Only)-

 Clean and oil seal cavities in 

seal plates (5, 29). Lightly oil 

(DO NOT use grease)

 outer 

surface of stationary member (28a). Press stationary member 

(28a) firmly into inner seal plate (5), using a seal pusher (see 

parts list - seal tool kit). Nothing but the seal pusher is to 

come in contact with seal face (see Fig 9).

IMPORTANT! - DO NOT hammer on the seal 

pusher- it will damage the seal face.

Make sure the stationary member is in straight. Slide a bullet 

(see parts list - seal tool kit) over motor shaft. Lightly oil 

(DO 

NOT use grease)

 shaft, bullet and inner surface of bellows 

on rotating member (28b) see Figure 10. With lapped surface 

of rotating member (28b) facing inward toward stationary 

member, slide rotating member over bullet and onto shaft, 

using seal pusher, until lapped faces of (28a) and (28b) are 

together (see Figure 9).

It is extremely important to keep seal faces clean during 

assembly. Dirt particles lodged between these faces will 

cause the seal to leak. Place spring (28c) over shaft and in 

place on rotating member (28b), making sure it is seated 

on retainer and not cocked or resting on bellows tail. Slide 

retaining ring (28d) over shaft and let rest on spring (28c). 

Replace snap ring (32) in groove of shaft. Set square-ring 

(27) in groove on outer seal plate (29) and place outer seal 

plate (29) onto inner seal plate (5). Replace socket head cap 

screws (64) and torque to 60 in-lbs.

Outer Seal (All Units)- 

Press stationary member (28a) firmly 

into outer seal plate (5, or 29 on DS Units) as described 

above. Slide rotating member (28b) onto stationary member 

using seal pusher as described above. Place spring (28c) and 

retaining ring (28d) onto rotating member (28b). Assemble 

impeller and volute as outlined in paragraph F-2.2. Replace 

oil as outlined in paragraph F-1.4.

F-4) Motor and Bearing Service

F-4.1) Disassembly and Inspection:

To examine or replace the motor (7), capacitor (9, single phase 

units), controls (55, 56, optional), and bearing (25), drain oil 

from motor as outlined in paragraph F-1.1.  Disassemble volute 

and impeller as outlined in paragraph F-2.1 and disassemble 

shaft seal as outlined in paragraph F-3.1.

Position unit upright, using blocks to avoid resting unit on 

shaft. Unscrew cable hex bolts (11) and remove compression 

flange (16a) and power cord (16). Remove snap ring (19) with 

a flat head screwdriver. Pull the terminal block (21) out of the 

housing (6) using a T-bolt or pair of pliers and a .25-20 screw 

in the threads of the terminal block (21). Be sure to leave 

slack on the motor leads connected underneath. Use needle 

nose pliers to pull each female connector off of the pins on 

the underside of the terminal block (21) see Figure 11. The 

unit voltage should be noted. Repeat cable and terminal block 

removal procedure for any control cables (56) if equipped. 

Remove socket head cap screws (47). Vertically lift the motor 

housing (6) from seal plate (5) by lifting handle (13). Inspect 

square ring (27) for damage or cuts. Remove the motor bolts 

and lift motor stator from seal plate (5). Disconnect capacitor 

leads from capacitor (9, single phase units). Examine bearing 

Stationary Member

(28A) Polished Face Out

Seal Pusher

Seal Plate (5) for L series 

and (29) for DS series

FIGURE 9

Motor & Seal Plate

Bullet

Rotating Member 

(28B)

Seal Pusher

FIGURE 10

FIGURE 8

FIGURE 11