Goulds Pumps SRL Series - IOM - Manual (Page 33)

Page 19
20x18x40 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 rear sideplate (2-047-0) by using jackscrews provided for that
purpose. Remove gland side liner (2-174-0) by using jackscrews provided for that
purpose.
5. Remove bolts holding down bearing cylinder (5-084-0).
6. Drain oil from bearing cylinder (5-084-0) by removing the bottom pipe plug.
7. Loosen adjusting screws. Remove bearing cylinder assembly out from
casing and off the pedestal (5-083-0).
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 waterseal bushing (6-008-0) from the casing.
Note the order in which parts are removed in this arrangement. See page 2 for
standard stuffing box arrangement or see sectional arrangement for heavy duty
stuffing box..
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 O-ring (5-914-3). Remove cover carefully so as not to damage
bearing seal (5-177-3). Now bearing seal 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. To remove shaft and bearings, hold bearing cylinder in a vertical position
using cylinder body pads. Place shoulder type eyebolt in end of shaft (5-007-0)
and pull out from cylinder.
14. Remove inboard roller bearing (5-038-3) by using a suitable bearing puller.
Remove spring retainer (5-147-4) and springs. Remove bearing locknut (5-516-4)
and lockwasher (5-517-4). Remove outboard roller bearing (5-038-4) by using a
suitable bearing puller. Remove bearing spacer (5-078-4). Remove thrust bearing
(5-038-0) by using a suitable bearing puller. Slide thrust bearing spacer ring off
the shaft.
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 inboard roller bearing (5-038-3) 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 bearing must contact shaft shoulder. Dry cool bearing to
room temperature.
2. Place spring retainer (5-147-4) on shaft and also outer race of thrust bearing.
Mount thrust bearing spacer ring on shaft (5-007-0) to 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.
3. Mount bearing spacer (5-078-4) with largest diameter adjacent to thrust
bearing (5-038-0). Mount outboard roller bearing (5-038-4) on shaft using the
same method as thrust bearing (5-038-0). Inner race of bearing must contact
spacer. Mount lockwasher (5-517-4) and locknut (5-516-4) and tighten.
4. With bearing cylinder and shaft held securely in a vertical position begin to
lower shaft in cylinder making sure that inboard bearing (5-038-3) outer race is
parallel and square to shaft during assembly. At this time, place springs in spring
retainer (5-147-4) and fit into cylinder bore while making sure that the outer race
of thrust bearing (5-038-0) is adjacent to retainer. Put shaft and bearings into
cylinder.
5. Assemble bearing seal (5-177-4) and O-ring (5-914-4) in cover (5-018-4)
and mount to bearing cylinder (5-084-0). After tightening screws, an axial
clearance of .004"-.015" between outer race of thrust bearing (5-038-0) and
spring retainer (5-147-4) should exist. Check this clearance by using pipe tap hole
on top of bearing cylinder.
6. Mount bearing seal (5-177-3) and O-ring (5-914-3) in cover (5-018-3) and
bolt to bearing cylinder. Mount water slinger (5-024-3).
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 assembled bearing cylinder on pedestal (5-083-0) and bolt into place.
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).
11. Replace suction side liner (2-174-5) and then suction sideplate (2-046-5).
Bolt two half casings together. Now check all sideplate stud nuts for tightness.
12. See impeller clearance adjustment. After clearance is established lock
adjusting screws.
13. 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.
14. Reconnect suction and discharge piping.
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.