1900 Series Horizontal Splitcase Pumps
Instruction and Repair Manual
25
11/12/18
14. If pump is grease lubricated remove zerks (164) and pipe plugs (168A) from cartridge caps (A159 and B159). If pump
has oil lubrication option, Model 1920 only, remove breather cap from top of cartridge caps and remove close
nipples from bottom of cartridge caps. The remaining oil cup, street elbows, and nipples are loose at this point and
can be removed as an assembly.
15. For Model 1910 and 1940 pumps, loosen and remove capscrews (159F) from cartridge cap (A159). Outboard shaft
end protector (118) may be removed from its recess in the outboard cartridge cap at this time if necessary. Remove
retainer (161) with truarc pliers. Remove gasket (159B).
NOTE:
For Model 1920 pumps, if unit has tandem shaft, protector (118) is not used. Remove slinger and capscrews (159F).
Slide cartridge cap (A159) and grease seal off shaft. Press grease seal out of cartridge cap if it is necessary to replace
this seal. Remove retainer ring (161) with truarc pliers. Remove gasket (159B).
16. Outboard bearing (168) is press fitted onto shaft (4). To remove it, place a puller on bearing cartridge (A158) and pull
cartridge, grease seal (159A), and bearing from shaft. The grease seal can be pressed from the bearing cartridge if it
needs replacing. Slide slinger (A126), lantern ring (10), and bushing (20) off shaft (4).
17. Removal of the inboard bearing is basically the same as the outboard bearing. Remove capscrews (159G) and slide
slingers (B126), cartridge cap (B159), grease seal (159C), and gasket (159E) off shaft.
18. Pull or press off bearing cartridge (B158), grease seal (159D), and bearing (163). Remove slinger (C126), lantern ring
(10), and bushing (20) from shaft.
19. If unit has right-hand rotation, unscrew and remove outboard sleeve (A14) first. Remove O-ring (14A). If unit has left-
hand rotation, unscrew and remove inboard sleeve (B14). Remove O-ring (14B).
20. On right-hand unit, balance of the parts will be removed as follows: Pull or tap impeller (B1) off shaft (4) using care
not to damage impeller. Remove gasket (39A). Slide casing bushing (39) off separator sleeve (48). Pull separator
sleeve, gasket (39B), and impeller (A1) off shaft. Remove gasket (14B) and key (102). Unscrew and remove shaft
sleeve (B14). Left-hand unit disassembly will begin with impeller (A1) and end with sleeve (14A).
21. Disassemble wearing ring(s) (17) (optional) from impeller(s) (B1) and (A1) only if necessary. For pumps on power
frame 5, remove setscrews (16A). Apply a puller and gradually withdraw wearing rings (17) from impellers (B1 and
A1). Wearing rings may have to be cut or trimmed off the impeller. If a lathe is used to trim rings off, use care not to
clamp impeller too tight and cause distortion. Also use care not to remove any metal from impeller.
22. Remove locking and locating pins (39C, 17A, 2C, and 19F) from lower casing half (2) only if replacement
is necessary.
23. Nameplate and its securing screws (not pictured) should
be removed only if replacement is necessary.
24. On Model 1940 pumps unscrew capscrews (74B) to remove
motor and motor bracket (74) from casing half (2). It is best to
leave motor bracket on motor as it helps
protect motor shaft from possible damage. Remove nuts
(77C) from capscrews (74A) which allows motor to be
separated from motor bracket.
DISASSEMBLY OF PUMPS WITH
MECHANICAL SEALS:
1. Perform disassembly procedures as previously given through step 8.
FLEXIBLE CUP
STATIONARY SEAT
WASHER
FLEXIBLE BELLOWS
RETAINER
DRIVE RING
SPRING
Figure 3. Mechanical Seal
