Instruction 2111-801C
01-04
11
IF UNIT IS EQUIPPED WITH MECHANICAL SEAL:
5.B Remove cap screws and washer (123). Remove seal box (120) from shaft (1). If the shaft area
surrounding the water slinger (13) is corroded, polish with a fine emery cloth before sliding water slinger
(13) off shaft. Polish and oil remainder of shaft in this area to prevent damage to grease seal (12) when
shaft is pulled through.
5.C Push the mechanical seal seat out of the seal box cover (121), using care not to scratch seal face. Lift the
rotating assembly out of the seal box (120). Push the mechanical seal seat out of the seal box (120),
again being careful not to scratch the seal face.
SHAFT SLEEVE DISASSEMBLY:
6.
Shaft sleeve (30) may be pulled off of shaft after shaft sleeve set screw (98) is removed. Remove shaft
sleeve "0" ring (101).
REMOVAL OF RADIAL BEARING:
7.
Remove cap screws (6), tighten adjusting screw (57) approximately 1/2 turn, and remove shims (133).
Rotor assembly consisting of thrust bearing housing (2), shaft (1), thrust bearing (8) and radial bearing
(11) can then be pulled through the top of the radial bearing housing (10) and casing cover (23).
8.
Using a suitable pulling device, remove radial bearing (11) and bearing holder (5) (#4B Frame only-Figure
3), if furnished.
REMOVAL OF THRUST BEARING:
9.
Remove retaining ring (7). Clean, polish and oil end of shaft around grease seal (21) and pull thrust
bearing housing (2) off of bearing/shaft. Remove bearing locknut (3) and washer (4). Using a suitable
bearing puller, remove bearing (8). Remove grease seal (21) from thrust bearing housing (2).
10. To separate radial bearing housing (10) from casing cover (23), remove cap screws (142). Remove
grease seal (12) from casing cover (23). Generally it is not necessary to disassemble the lower (suction)
end of the pump. On vertical units, cap screws (63) secure the volute (28) to the section plate (62) to the
pump support (39) (when furnished). Screws (37) secure the suction elbow (93) to the suction plate (62).
The volute Handhole cover (51) is secured with screws (56), and the suction elbow Handhole cover is
secured with screws (34).
REASSEMBLY PROCEDURES:
When assembling and reassembling pumps, CHICAGO PUMP strongly urges replacing all parts subject
to wear, as listed on parts list on page 10. The procedure for ordering spare parts is outlined on page 9.
Prior to reassembling the pump:
•
Clean, polish and oil shaft, inspecting for unusual wear or scoring.
•
Scrape and clean all gasketed mating faces to insure proper scaling.
•
Make sure that stuffing/seal box, shaft sleeve and seal ring arc thoroughly cleaned.
•
Clear all lubricant paths and replace any defective fittings.
•
If any part not listed as a recommended spare part shows excessive wear, it too should be replaced.
Contact your CHICAGO PUMP representative for ordering replacement parts.
CAUTION-WHEN INSTALLING BALL OR ROLLER BEARINGS, PRESS ONLY AGAINST INNER RACES
OF BEARINGS. PRESSING ON OUTER RACES WILL DAMAGE BALLS OR ROLLERS AND RUIN THE
BEARING. PRESS EVENLY ON BEARING INNER RACE, USING EXTREME CARE NOT TO SCORE
SHAFT.
It may
be necessary to heat bearings to facilitate installation because of close tolerance fits. Bearings may be
heated by either of the following methods:
OIL BATH:
Accomplished by submerging bearing in a tank of oil having a high flash point. The bearing
should be suspended so as not to be in contact with the heat source, for 20 to 30 minutes at a temperature of
approximately 200
0
F Oil temperature must not exceed 250
0
F.
INDUCTION HEATING:
Accomplished by applying heat directly to the bearing (i.e. commercially available
induction bearing heater). Extreme caution must be exercised to insure that bearing temperature does not
exceed 200
0
F
The bearings should be quickly installed and positioned squarely against mating face while it is still hot, and
secured with appropriate locknut or retaining ring.
