1900 Series Horizontal Splitcase Pumps
Instruction and Repair Manual
26
11/12/18
2. Loosen and remove nuts (19A) and washers (19B), thus freeing swing bolts (19D) to allow shaft and impeller assembly
to be lifted from casing half (2) with sling and hoist or crane as described in step 10 above.
CAUTION:
Use extreme care in moving assembly. Ceramic seats can be cracked by just sliding loose on shaft. To prevent this,
wrap seal securely in a shop cloth or other protective covering.
3. With shaft and impeller assembly on a suitable bench, cradle, or work stand, loosen and remove pipe plug (168A)
from inboard cartridge cap (B159). Remove grease zerk (164) and capscrews (159G) and slide the cartridge cap with
grease seal (159C) off end of shaft (4). Remove gasket (159E).
4. Pull or press bearing cartridge (B158), grease seal (159D), and bearing (163) off shaft. Remove slinger (C126).
5. One piece gland (31) used with mechanical seal assembly can now be removed from shaft. O-ring (31A) can be
removed from seal gland if desired.
CAUTION:
Exercise great care in removing seal assembly (456)
to keep from marring or otherwise damaging precision
ground mating surfaces.
6. Scribe a mark on shaft sleeves for relocating seal collar on
reassembly. Loosen setscrews (456C), securing seal collars
(456B) to shaft sleeves and slide them off.
7. Proceed with further disassembly of outboard ball bearing
and seal assembly using same basic procedure.
8. After removal of mechanical seals proceed with balance of
disassembly in same manner as described for packing design.
REASSEMBLY:
Reassembly will generally be in reverse order of disassembly. If disassembly was not complete, use only those steps
related to your particular repair program.
1. Position locating pins (2C) in casing half (2), adding swing bolt
pins (19F) if used on your pump. Install wearing ring pins (17A)
and casing bushing pins (39C). Tap pins gently to seat them
in place. Place O-ring (14B) in shaft sleeve (B14). If nameplate
was removed, install it with screws.
2. On right-hand unit, thread inboard sleeve (B14) onto shaft
(4) distance “A”. (Refer to Fig. 4.) On left-hand unit, thread
outboard sleeve (A14) onto shaft distance “A”. (Refer to Fig.
5.) When sleeve is in position, its keyway should align with
keyway on shaft. Coat key and keyway with Loctite
®
sealant
grade 242. Insert key (102) into keyways
of shaft and sleeve. Tap key firmly in place.
3. Coat inside diameter of impeller wearing rings (17) (optional) with Loctite
®
sealant Grade 271 and press them over
hubs of impeller(s) (B1) and (A1). Do not attempt to hammer impeller wear rings into position, since they are a press
fit. Use of an arbor press is preferred. However, placing a block of wood over the impeller wearing ring and pressing
it in will work satisfactorily. For pumps on power frame 5 only, four setscrews (16A) will be installed by drilling into
D. Rotating element removed from lower casing.
E. Rotating element placed in a protective cradle
for further disassembly.