Goulds Pumps SRL Series - IOM - Manual (Page 37)

Page 23
8x8x25 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 (2-046-5) attached.
Cover is held to casing by (12) studs and retaining nuts of which (4) hold suction
side liner (2-174-5) in place. Remove cover and attached suction sideplate 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 . 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 nut 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 waterseal 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 waterseal
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 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 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 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 bearings (5-038-3 an 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 lockwasher (5-517-4) and locknut (5-516-4).
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). Bolt covers to bearing cylinder
(5-084-0). Install deflector (5-040-3).
5. 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.
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). 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).
8. Screw on impeller (4-002-0).
9. 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.
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 (5-030-0) 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 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 sideplate. 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.