Goulds Pumps SRL Series - IOM - Manual (Page 21)

Page 7
2x2x10 SRL
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. The suction side liner (rubber-lined, 2-174-5) may be removed by using
jackscrew provided for that purpose.
2. Impeller (4-005-0) 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 pound on a hardwood block held against the impeller
vane at the periphery in the counterclockwise direction when viewed from the
impeller end. Remove sleeve washer at the impeller hub.
3. Remove gland side liner (rubber-lined 2-174-0) from the casing.
4. Remove gland (6-014-0). Slide deflector (5-024-3) back toward stuffing box.
5. Drain oil from pedestal reservoir by removing side pipe plug.
6. Remove bearing housing adjusting bolts and nuts at outboard end. Remove
shaft (5-007-0), bearings (5-026-3 and 5-026-4) and bearing housing (5-025-4)
from the pedestal (5-083-0) using a drift pin and hammer or a hydraulic press if
available.
7. Remove packing (6-924-0) from casing. Remove half seal cage (6-013-0)
and bushing (6-519-0). Note the order in which parts are removed in this
arrangement. See page 2 for stuffing box arrangement A or B. Remove shaft
sleeves (1-009-0) and (1-009-1) by sliding them off the shaft. Remove O-ring.
Remove deflector (5-024-3).
8. Place shaft assembly in bench vise and remove bearing retaining ring
(5-068-4). Clean shaft before removing bearing housing. Slide bearing housing
(5-025-4) from outboard bearing. Remove O-ring. Now bearing seal (5-177-4)
may be inspected and removed if necessary. Remove bearing retaining ring
(5-086-4).
9. Remove inboard and outboard bearings (5-026-3) and (5-026-4) from shaft
using a hydraulic press or suitable bearing puller.
10. Remove bearing cover (5-018-3) and accompanying gasket (5-409-3). Now
bearing seal (5-177-3) may be inspected and removed if necessary.
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 bearings (5-026-3) and (5-026-4) 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. Replace bearing
retaining ring (5-086-4). Dry cool bearings to room temperature.
2. Locate O-ring on outside diameter of bearing housing (5-025-4) and fit
bearing seal (5-177-4) in bearing housing. Slide bearing housing over outboard
bearing (5-026-4) and replace bearing retaining ring (5-086-4).
3. Mount bearing seal (5-177-3) in bearing cover (5-018-3). Replace gasket
(5-409-3). Bolt bearing cover to pedestal (5-083-0).
4. Assemble shaft, bearings and bearing housing into pedestal making sure that
deflector (5-024-3), seal cage (6-013-0) and waterseal bushing (6-519-0) are
located on shaft between stuffing box and bearing cover during assembly. Fit
adjusting bolts and nuts at outboard end to bearing housing and pedestal.
5. Assemble shaft sleeve (spacer) (1-009-1) and shaft sleeve (stuffing box)
(1-009-0) with O-rings, on the shaft. Locate deflector (5-024-3) on shaft sleeve
(spacer). Make sure that deflector does not rub against bearing cover.
6. Install waterseal busing (6-519-0) and half seal cage (6-013-0) into stuffing
box. Replace packing (6-924-0) and gland (6-014-0). Check if waterseal bushing
is concentric with sleeve.
7. Replace gland side liner (2-174-0). Do not use excessive force on liner
stud nuts.
8. Locate sleeve washer and O-ring on shaft at shaft sleeve (1-009-0) and then
screw on impeller (4-002-0).
9. Replace suction side liner (2-174-5). Do not use excessive force on liner stud
nuts. Bolt two half casings together. Check liner stud nuts for tightness.
10. See impeller clearance adjustment. After clearance is established secure
locking nuts.
11. Fill pedestal reservoir with oil to proper level and pack bearing cover and
bearing housing seals with high temperature grease through connections
provided. See LUBRICATION page 2.
12. Reconnect suction and discharge piping.
IMPELLER CLEARANCE ADJUSTMENT
1. Adjust impeller clearance by means of adjusting bolt and nut located at
outboard end.
2. Move the bearing assembly forward until the impeller touches the suction
side liner. This is tested by rotating the shaft by hand.
3. The bearing assembly should then be brought back 1/16" so that the impeller
will not rub on suction liner.
4. Check the rotating element by hand for freedom of rotation.
5. Tighten locking nut on adjusting bolt. By making this adjustment
periodically (depending on the rate of wear) original pump efficiency can be
maintained.