Goulds Pumps SRL Series - IOM - Manual (Page 25)

Page 11
8x6x18 and 10x8x21 SRL-C
DISMANTLING PROCEDURE
1. Open casing by removing a section of the suction pipe, breaking discharge
pipe connection, supporting discharge pipe and loosening and removing the bolts
holding the casing halves together while making sure suction side casing is
properly supported from dropping. Suction half casing (2-001-5) can then be
removed. Remove casing sideplate (2-046-5). The suction side liner (rubber-lined
2-174-5) may be removed by using jackscrews provided for that purpose.
2. Impeller (4-002-0) is mounted with a right hand thread. Rotation is clockwise
when viewed from the pump drive end. To remove the impeller, hold the shaft to
keep it from rotating and pound on a hardwood block held against the impeller
vane at the periphery in the counterclockwise direction when viewed from the
impeller end.
3. Remove gland side liner (rubber-lined 2-174-0) from the casing.
4. Remove gland (6-014-0). Remove shaft sleeve (1-009-0) by prying it loose at
stuffing box and sliding it off the shaft. Remove sleeve O-ring.
5. Remove both bearing cylinder straps (5-127-9).
6. Drain oil from bearing cylinder (5-084-0) by removing the bottom pipe plug.
7. Remove adjusting screw mechanism which includes cotter pin, castle nut and
washer. Then rotate bearing cylinder assembly so that the cylinder lug does not
foul pedestal (5-083-0) when removing the bearing cylinder assembly.
8. Place the bearing cylinder assembly on work bench and, if possible, hold the
cylinder in a fixed position.
9. Remove packing (6-924-0), half seal cage (6-013-0) and waterseal bushing
(6-519-0) from the casing. Note the order in which parts are removed in this
arrangement. See page 2 for stuffing box arrangement A or B.
10. Remove deflector (5-024-3) from the shaft. Remove inboard bearing cover
(5-018-3) and accompanying gasket (5-409-3). Now bearing seal (5-177-3) may
be inspected and removed if necessary.
11. With sheave and key removed from the shaft, the outboard bearing cover
(5-018-4) will slide off the shaft after removal of bolts. Clean shaft before
removing bearing cover. Remove accompanying gasket (5-409-4). Now bearing
seal (5-177-4) may be inspected and removed if necessary.
12. Remove shaft (5-007-0) and bearings (5-038-3 and 5-038-4) from the
bearing cylinder using a drift pin and hammer or a hydraulic press if available.
13. Remove bearing lockout (5-516-4) and lockwasher (5-517-4). Remove
bearings by using a hydraulic press or suitable bearing puller.
ASSEMBLY PROCEDURE
IMPORTANT - It is essential that all parts be thoroughly cleaned before
reassembly. When handling rotating element and bearings, maintain a clean and
dust-free environment. Do not unwrap new bearings prior to their installation.
New bearings are coated with a rust preventative having good lubricating
qualities. This coating should not be removed unless the bearings have become
dirty while in storage.
1. Mount bearings (5-038-3 and 5-038-4) on shaft (shrink fit) by first heating
them in hot oil at approximately 150° F (66° C) for sufficient expansion. In
mounting inner race of bearings must contact shaft shoulder. Dry cool bearings to
room temperature.
2. Assemble locknut (5-516-4) and lockwasher (5-517-4).
3. Assemble shaft and bearings into cylinder or frame liner (5-084-0). This can
be done either horizontally or vertically. In each case inboard bearing (5-038-3)
outer race must be parallel and square to shaft when assembling. Shaft must be
held securely when guiding into cylinder while taking care not to damage shaft
surfaces.
4. Mount seals (5-177-4 and 5-177-3) in bearing covers (5-018-4 and 5-018-3).
Replace gaskets (5-409-4 and 5-409-3). Install deflector (5-024-3).
5. Install waterseal bushing (6-519-0) and half seal cage (6-013-0) into stuffing
box.
6. Place bearing cylinder or frame liner on pedestal (5-083-0) and bolt bearing
cylinder straps (5-127-9) into place. Leave bolts slightly loose for later
adjustment, step 11.
Reassemble adjusting screw mechanism.
7. Mount shaft sleeve (1-009-0). Replace packing (6-924-0) and gland
(6-014-0). Check if waterseal bushing (6-519-0) is concentric with sleeve.
8. Replace gland side liner (2-174-0). Do not use excessive force on liner stud
nuts.
9. Screw on impeller (4-002-0).
10. Replace suction side liner (2-174-5). Replace casing sideplate (2-046-5). Do
not use excessive force on casing sideplate stud nuts. Bolt two half casings
together. Check casing sideplate stud nuts for tightness.
11. See impeller clearance adjustment. After clearance is established, secure all
bolts on bearing cylinder straps.
12. Reconnect suction and discharge piping.
13. Fill cylinder or frame liner with oil to proper level and pack both bearing
cover seals with high temperature grease through connections provided. See
LUBRICATION, page 2.
IMPELLER CLEARANCE ADJUSTMENT
1. Loosen the bolts clamping down the bearing cylinder or frame liner straps.
2. By means of the adjusting screw, move the bearing cylinder forward until the
impeller touches the suction side liner. This is tested by rotating the shaft by hand.
3. The bearing cylinder or frame liner should then be brought back 1/16" so that
the impeller will not rub on suction liner.
4. Check the rotating element by hand for freedom of rotation.
5. Retighten bearing cylinder straps. By making this adjustment periodically
(depending on the rate of wear) original pump efficiency can be maintained.