Page 54 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

Installation, Maintenance, and Repair of Horizontal Pumps 39

PART NO. DESCRIPTION PART NO. DESCRIPTION
00 WING 21-1 IMPELLER NUT
02 wrffi COVER 21-4 BEARING LOCKNUT
05 IHPELLER 22-2 SEAL SLEEVE
06-1 IFIPELLER RING-FRONT 23-1 MECHANICAL SEAL
06-2 IMPELLER RING-BACK 29-1 DEFLECTOR-I NZOARD
07-2 SEAL GLAND 29-2 OIL FLINGER
08-1 CASE RING-FRONT 29-3 DEFLECTOR- WTBDARO
08- 2 CASE RING-BACK 31 ERG. LOCKWASHER
11-1 IMPELLER KEY 31-1 BEARING BACKUP RING
13-1 BEARING END CAP-INBOARD 45 COOLER COVER
13-2 BEARING END CAP-OUTBOARD 47-1 THROAT BUSHING
15-1 CASING GASKET 47-2 SEAL RETAINER
15-2 GLAND GASKl3 47-3 THROllLE 6USHING
15-3 SLEEVE GASKET 49 BRG. BRACKET
15-6 COOLER COVER GASKET 49-1 ERG. BRACKET SUPPORT
15-7 ARTUS PLASTIC SHIMS 81-1 RADIAL BEARIlG
20 SHAFT 81-2 THRUST BEARING
Figure 1-15. Crass section and parts list of a horizontal overhung, single stage process
pump. (Courtesy Union Pump (Canada) Ltd.)

5. Unscrew cap screws holding bearing housing (49) to casing cover
(02).
6. bull bearing housing (49) from casing cover (02). Be careful not to
damage the mechanical seal.
7. Loosen set screws holding seal rotating member to sleeve.
8. Pull seal sleeve (22-2) and the mechanical seal rotating element off
shaft.
9. Remove mechanical seal from seal sleeve. Nore: Mechanical seals
have lapped sealing faces. Handle with care, keep wrapped in
clean cloth and avoid contacting seal faces.