Goulds Pumps SRL Series - IOM - Manual (Page 29)

Page 15
14x12x29 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 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 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. 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 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 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. Remove bearing spacer (5-078-4).
Remove thrust bearing (5-038-0) by using a suitable bearing puller. Now remove
spring retainer (5-147-4) and accompanying springs.
ASSEMBLY PROCEDURE
IMPORTANT - It is es sen tial that all parts be thor oughly cleaned be fore re as sem bly.
When han dling ro tat ing el e ment and bear ings, main tain a clean and dust-free
en vi ron ment. Do not un wrap new bear ings prior to their in stal la tion. New bear ings are
coated with a rust pre ven ta tive hav ing good lu bri cat ing qual i ties. This coat ing should
not be re moved un less the bear ings have be come dirty while in stor age.
1. 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.
2. Place spring retainer (5-147-4) on shaft. Mount thrust bearing spacer ring on
shaft (5-007-0) so as 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. Mount outboard roller bearing (5-038-4) using the same method as the
thrust bearing (5-038-0). Inner race of bearing must contact spacer.
4. Mount lockwasher (5-517-4) and locknut (5-516-4). During assembly of shaft
and bearings into cylinder (5-084-0) place springs into spring retainer (5-147-4)
and align retainer with outer race of thrust bearing (5-038-0) so that both will enter
bearing cylinder bore during assembly sequence. Also ensure that inboard bearing
(5-038-3) outer race is parallel and square to shaft at assembly. 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 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 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). Mount shaft sleeve (1-009-0). Replace
packing (6-924-0) and gland (6-014-0).
10. Screw on impellers (4-002-0).
11. 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.
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 (5-030-0) 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.