Goulds Pumps SRL Series - IOM - Manual (Page 27)

Page 13
12x10x25 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 suction
sideplate (2-046-5) by using jackscrews provided for that purpose. The suction side
liner (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 apply an adequate shock load on impeller in a counterclockwise
direction (viewed from impeller end) to unscrew it.
3. Remove gland (6-014-0). Remove shaft sleeve (1-009-0) by sliding it off the shaft.
4. Remove gland side liner (2-174-0) by using jackscrews provided for that purpose.
5. Remove both bearing cylinder straps (5-127-0).
6. Drain oil from bearing cylinder (5-084-0) by removing side pipe plug.
7. Loosen adjusting screws. Then rotate bearing cylinder assembly so that the
cylinder lugs do 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 it in a
fixed position.
9. Remove packing (6-924-0) and water seal bushing (6-008-0) 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. The stuffing box (6-073-0) normally would not be removed. If necessary, it can be
removed by unscrewing retaining nuts and removing the tapered dowel pins. Remove
O-ring (6-914-0).
11. Remove water slinger (5-024-3). Remove inboard bearing cover (5-018-3) and
accompanying gasket (5-409-3). Remove cover carefully so as not to damage bearing
seal. Now bearing seal (5-177-3) may be inspected and removed if necessary.
12. With 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 cover seal (5- 177-4) may be inspected
and removed if necessary.
13. Remove shaft (5-007-0) and bearings (5-038-3 and 5-038-4) from the bearing
cylinder by supporting shaft and pushing or pulling it out from the cylinder. Take care
not to damage shaft surfaces.
14. Remove inboard roller bearing (5-038-3) by using a suitable bearing puller.
Remove locknut (5-516-4) and lockwasher (5-517-4). Remove outboard roller bearing
(5-038-4) by using a 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. If required, install stuffing box (6-073-0) with O-ring (6-914-0) at this time.
Replace taper dowels. Install water seal bushing (6-008-0).
6. Place bearing cylinder (5-084-0) on pedestal (5-083-0) and bolt straps
(5-127-0) into place. Leave bolts slightly loose for later adjustment, step 10.
7. Install gland side liner (2-174-0). Mount shaft sleeve (1-009-0). Replace
packing (6-924-0) and gland (6-014-0).
8. Screw on impeller (4-002-0).
9. Replace suction side liner (2-174-5) and then suction sideplate (2-046-5).
Bolt two half casings together. Check sideplate stud nuts for tightness.
10. See impeller clearance adjustment. After clearance is established secure all
bolts on bearing cylinder straps. Secure adjusting screws.
11. Reconnect suction and discharge piping.
12. Fill bearing cylinder with oil using oil cap (5-530-0) to proper level (see sight
glass). Cylinder must be horizontal and level so that both sight glass oil readings
are identical. Pack both bearing cover seals with high temperature grease through
grease fittings. 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 .040" 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.