1900 Series Horizontal Splitcase Pumps
Instruction and Repair Manual
24
11/12/18
2. Close such valves or flow-control devices necessary to make certain that flow of liquid will not take place
during disassembly.
NOTE:
Discharge and suction piping need not be disturbed unless complete pump assembly is to be removed.
3. Drain liquid from pump by removing plugs (3B and 3A). Disconnect bypass lines if applicable.
4. Loosen and remove capscrews (2A) securing casing half (3) to remainder of pump assembly.
NOTE:
If pump being disassembled is 3" 1913A, 3" 1923A, 3" 1843A or larger, remove capscrews (2B) before attempting to
separate the casing halves.
5. Make certain that all securing capscrews are removed, then carefully remove casing half (3) using hoist or crane
with sling attached to cast hooks.
CAUTION:
Use extreme care when casing comes loose that it does not drop out of sling as this would cause extensive damage to
other components of pump.
6. Remove gasket (157) and scrape mating surfaces of casing halves to remove pieces of gasket which may have
adhered in separation. Take care not to scratch or mar mating surfaces.
7. For Model 1920, 1920F and 1940 pumps, loosen setscrews in flexible coupling and slide halves apart. For Model 1910
remove flexible shafting from pump.
8. Remove capscrews (6A) securing bearing caps (6). Lift off bearing caps (6) and pins (158A). Mark caps to ensure
correct replacement and orientation on the respective bearing arms.
9. Loosen and remove nuts (19A), washers (19B), and clamps (19C), securing split halves of packing glands (19). Remove
swing bolts (19D).
10. Assuming that further work is required on shaft and impeller assembly, use properly secured rope slings and hoist
or crane as required to lift it from casing half (2) and place it on suitable bench or work surface.
CAUTION:
Take care not to dent or damage impeller and/or other parts. Use of a supporting cradle or work stand is
recommended.
NOTE:
Disassembly procedure from this point covers pumps having standard packing. If pump has mechanical seals, refer to
Specific Instructions.
11. Remove and discard rings of packing (212), since replacement with new packing is recommended whenever pump is
disassembled.
12. Slide pump half of flexible coupling off shaft (4) and remove key (272). Pry up on end of key so as not to damage
shaft. If preferred, key may be removed by carefully tapping from outer end with a brass drift or similar nonmarring
tool, using a small hammer.
13. Remove casing wearing rings (16).