Goulds Pumps SRL Series - IOM - Manual (Page 41)

Page 27
14x12x36 SRL-XT
DISMANTLING PROCEDURE
1. Remove section of suction pipe adjacent to suction casing (2-001-5). Casing
is provided with removable cover (2-091-0) with suction sideplate (2-046-5)
attached. Cover is held to casing by (12) studs and retaining nuts of which (4) hold
suction sideliner (2-174-5) in place. Remove cover and attached suction side
lockwasher (5-517-4) plate by means of jackscrews provided. If necessary,
remove suction sideplate from cover attached by (4) retaining studs and nuts.
Break discharge connection, support discharge pipe, loosen and remove bolts
holding casing halves. Make sure suction casing is supported from dropping.
After suction casing is removed, suction side liner (2-174-5) can be removed with
jackscrews provided.
2. Impeller (4-002-0) is mounted with a right hand thread. Rotation is clockwise
viewed from the pump drive end. To remove the impeller, first remove the shaft
sleeve nut (5-020-3). This is done by removing the two (2) Socket Head
Capscrews. Then using one as jackscrew in tapped hole at crown of nut, force
joints apart sufficiently to lever one nut half clear from shaft shoulder. Other half
may then be removed by hitting nut with wooden mallet or of similar soft material
to prevent damage to nut half. With cut off, impeller can be easily removed from
shaft by the application of shock load counterclockwise (viewed from impeller
end) while holding shaft from rotating.
3. Remove gland (6-014-0). Remove shaft sleeve (1-009-0) by sliding if off the
shaft.
4. Remove gland side liner (2-174-0) by means of jackscrews provided.
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
stuffing box. Note the order in which parts are removed in this arrangement. See
page 2 for stuffing box arrangement A or B.
10. Stuffing box (6-073-0) normally would not be removed unless stuffing box
bushing (6-008-0) needs replacement. If required, unscrew (4) retaining socket
capscrews. Then using two (2) jackscrews in tapped holes remove stuffing box
from casing.
11. Remove deflector (5-040-3). 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 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 (5-194-4). 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 essential that all parts be thoroughly cleaned before
reassembly. When handling rotating elements 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 it
in hot oil at approximately 150° F (66° C) for sufficient expansion. In mounting,
inner race offering 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 (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 (5-308-3) 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-rings (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-rings (5-914-3) in cover (5-018-3) and
bolt to bearing cylinder. Mount deflector (5-040-3).
7. If removed from casing, re-install stuffing box (6-073-0) at this time. Install
water seal bushing (6-008-0) and mount stuffing box in gland half casing
(2-001-0), using two straight dowels to locate the stuffing box.
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). Re-assemble sleeve nut (5-020-3) and
mount against shaft shoulder. Mount 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 (2-714-5) and replace retaining studs finger tight.
Replace suction cover (2-091-0) complete with suction sideplate (2-046-5).
Secure cover to casing and tighten side liner and sideplate retaining stud nuts.
Bolt casing halves together and then recheck above-mentioned 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 on covers. 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 . 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 sideplate.
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