Goulds Pumps SRL Series - IOM - Manual (Page 31)

Page 17
16x14x34 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.
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 rear sideplate (2-047-0) by using jackscrews provided for that purpose.
Remove gland side liner (2-174-0).
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 shaft sleeve nut (5-015-0). 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 cover 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 O-ring (5-914-4). Now bearing cover seal (5-177-4) may be inspected
and removed if necessary.
13. Remove shaft (5-007-0) and bearing assemblies from the bearing cylinder by
supporting shaft and using bearing housing (5-025-4) tap holes, jack the rotating
element out of the bearing cylinder. Remove bearing housing O-ring (5-914-0).
14. Remove inboard roller bearing (5-038-3) by using a suitable bearing puller.
Remove oil slinger (5-485-4). Now push or slide bearing housing (5-025-4) off toward
the impeller end of shaft. Remove springs in bearing housing. Remove bearing locknut
(5-516-4) and lockwasher (5-517-4). Using SKF
KM—31 withdrawal nut, remove
outboard roller bearing (5-038-4) and bearing spacer (5-078-4). Remove thrust bearing
(5-038-0) 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 thrust bearing spacer ring on shaft (5-007-0) and contact shoulder. Mount
thrust bearing (5-038-0) on shaft (shrink fit) by first heating it in hot oil at
approximately 150° F (66° C) for sufficient expansion. In mounting, inner race of
bearing must contact spacer ring. Dry cool bearing to room temperature.
2. Mount bearing spacer with largest diameter adjacent to thrust bearing. Withdrawal
sleeve (5-078-4) together with outboard roller bearing (5-038-4) are placed on shaft.
Inner race of bearing must contact spacer. Mount lockwasher (5-517-4) and locknut
(5-516-4). Using locknut, drive withdrawal sleeve in outboard roller bearing so that
thrust bearing total clearance between rollers and outer race is set at .005-.007". Note
withdrawal sleeve movement of .015" reduces radial clearance of thrust bearing by
.001" approximately. Lock in proper clearance position.
3. Place the four springs in bearing housing (5-025-4) and slide housing on shaft and
over bearings. Assembly bearing seal (5-177-4) and O-ring (5-914-4) in cover
(5-018-4) and mount to bearing housing using the three tapped holes in housing. After
tightening screws an axial clearance of .005-.030" between outer race of thrust bearing
and bearing housing should exist. Check this clearance by using the cored hole for oil
return at bottom of housing. Mount oil slinger (5-485-4).
4. Mount inboard roller bearing (5-038-3) on shaft (shrink fit) by first heating it in hot
oil at approximately 150° F (66° C) for sufficient expansion. In mounting, inner race of
bearing must contact shaft shoulder. Dry cool bearing to room temperature.
5. Mount O-ring (5-914-0) on housing. Assemble shaft and bearings into bearing
cylinder (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.
6. Bolt bearing housing and cover assembly (5-025-4) and (5-018-4) to bearing
cylinder (5-084-0). Mount bearing seal (5-177-3) in cover (5-018-3) and using gasket
(5-409-3) bolt bearing cover to bearing cylinder. Mount water slinger (5-024-3). Install
shaft sleeve nut (5-015-0).
7. 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).
8. 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 12.
9. Install gland side liner (2-174-0). and then rear sideplate (2-047-0). Mount shaft
sleeve (1-009-0). Replace packing (6-924-0) and gland (6-014-0).
10. Screw on impeller (4-002-0). After seating on shaft shoulder, tighten shaft sleeve
nut (5-015-0).
11. Replace suction side liner (2-074-5) and then suction sideplate (2-046-5). Bolt two
half casings together. Check sideplate stud nuts for tightness.
12. See impeller clearance adjustment. After clearance is established secure all bolts
on bearing cylinder straps. Secure adjusting screws.
13. Reconnect suction and discharge piping.
14. 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 (5-905-0). 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.