17. Install spacer sleeves (157) after the last impeller has been installed and its Front Clearance has
been set. Check space between end of last spacer sleeve (157) and snap ring groove in end of
shaft. Add shims as necessary under the last spacer until the spacer sleeve covers approximately
½ of the snap ring groove. Enter the shaft retaining ring (snap ring) (361) over the shaft and press
down until it snaps in the groove.
18. Install O-ring (412K) on the discharge head (152).
19. Slide casing (100) over assembly and screw onto casing adapter (108). O-ring should be lubricated
to aid in assembly.
20. Screw discharge head (152) into casing (100).
21. Replace pump foot (131). Tighten cap screw (371U) finger tight. Tighten firmly after start-up and
when pump has reached operating temperature.
22. Lay pump in horizontal position. Secure frame to floor. Discharge head must be tightened to the fol-
lowing minimum torque value 600 ft. - lbs. (813 newton metres). Operation of pump without proper
torque on discharge head (152) can result in damage to the pump. Do not loosen discharge head to
align flange bolt holes. When holes do not align, the discharge head can be tightened more to ob-
tain alignment.
23. Pump is now ready for re-installation. Follow applicable installation, lubrication and start-up proce-
4.3 Alignment procedures on page 8
and
.
7.5 Bearing replacement
1.
Lock out power and remove motor from base.
2.
Support liquid end and remove the bearing frame assembly from the pump by removing cap screws
(371L).
3.
Unbolt and remove bearing end cover (109A).
4.
Remove stub shaft assembly. Replace bearings as needed.
7.6 Mechanical seal replacement
1.
Lock out power and remove motor from base. Support liquid end and remove the bearing frame
(228A) from case adapter (108) by removing end cover (109) to case adaptor (108) screws.
2.
Pull stationary seat mount (158) from fit in case adapter (108). Push stationary seat (385B) out of fit
in stationary seat mount (158). Clean parts and install new stationary seat. Renew O-ring as need-
ed.
3.
Slide rotary seal unit (383A) off pump shaft (122).)
4.
Slide new rotary unit over splined end of pump shaft (122) up against retaining ring (361D). Lubri-
cate shaft to avoid damaging rubber bellows of rotary seal unit.
5.
Reinstall stationary seat mount (158) with O-ring (412L) in case adapter (108) fit.
6.
Reinstall bearing frame (228A) and tighten bearing frame (228A) to case adapter (108) screws.
7.
Refer to mechanical seal drawing for special seal arrangements.
7.5 Bearing replacement
18
3335 Installation, Operation and Maintenance Instructions
