Xylem GOULDS AC8743, Инструкция по эксплуатации

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21
REPLACING MECHANICAL SEALS AND
BEARINGS
(without removing the upper half of the casing)
NOTE:
In order to replace the mechanical seal
and bearing housing on the coupler end, you must
use a spacer type coupler.
WARNING: Unexpected Startup Hazard
Disconnect and lockout power before servicing.
Failure to follow these instructions could result in
serious personal injury or death, or property
damage
.
CAUTION: Extreme Temperature Hazard
Allow pump temperatures to reach acceptable
levels before proceeding. Open the drain valve.
Do not proceed until liquid stops coming out of the
drain valve. If liquid does not stop flowing from the
drain valve, isolation valves are not sealing and
should be repaired before proceeding. After liquid
stops flowing from drain valve, leave the valve
open and continue. Remove the drain plug located
on the bottom of the pump housing. Do not
reinstall the plug or close the drain valve until
reassembly is completed.
Failure to follow these instructions could result in
moderate personal injury or property damage.
1. Close valves on suction and discharge sides
of pump. If no valves have been installed, it
will be necessary to drain the system.
2. Remove the coupler guard. For spacer
coupler, loosen the capscrews which secure
the coupler flanges to the coupler hubs.
Remove the coupler flanges and sleeve by
compressing the flanges and pulling out from
beneath the hubs or by loosening the Allen set
screws and sliding the hubs back on the
shafts. Remove the coupler hubs from the
pump shaft. For non-spacer couplers, loosen
set screws and slide flanges back on shafts
and remove rubber element.
3. Remove the capscrews from each of the
bearing housings and remove the bearing
housings by placing two 2.0" long full-threaded
capscrews or Allen set screws in the
jackscrew holes provided.
4. Bend back the lockwasher tab and remove
both the lockwasher and locknut from the
outboard end of the shaft (the opposite side of
the coupling).
5. Remove the socket-head capscrews holding
the gland plates to the stuffing boxes.
6. Insert threaded rods into the tapped holes in
the gland plate and install a fixture on the
threaded rods to use a puller. See Figure 14
for Dimensions of Universal Fixture (PN:
AC2394). Using the puller, tighten the bolt in
the center of the fixture to remove the bearing
and gland plate from the shaft. See Figures 15
and 16.
CAUTION: Pump Damage Hazard
Failure to remove the socket-head capscrews
before trying to pull the bearings off could cause
damage to the pump.
Failure to follow these instructions could result in
moderate personal injury or property damage.
1.75" 1.75" 2.0" 2.0"
.437 ¯ DRILL THRU
FOR .500-13
UNC-2 B THREAD
2.44"
1.25"
1.75"
2.0"
30
°
TYP
1.38
"
1.25
"
TYP
.25R
.50 TYP
8.0" ¯ X .50 THK MIN.
H.R. STEEL
Figure 14: Dimensions for Universal Fixture
(PN: AC2394)
7. Remove the inboard bearing and gland plate
in the same manner.
NOTE: The locknut and lockwasher are not used
on the inboard bearing.
CAUTION: Do not reuse the ball
bearings