Service Instructions - Bell and Gossett 1510 Series Instruction Manual

FIGURE 11
1510-S
MOTOR END
O-RING
O-RING
SEAL CAP

SERVICE INSTRUCTIONS

WARNING: UNEXPECTED STARTUP HAZARD
Disconnect and lock out power before servicing.
Failure to follow these instructions could result in serious per-
sonal injury or death, 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.)
CAUTION: EXTREME TEMPERATURE HAZARD
Allow pump temperature to reach acceptable levels
before proceeding. Open drain valve, do not proceed until
liquid stops coming out of drain valve. If liquid does not
stop flowing from drain valve, isolation valves are not seal-
ing and should be repaired before proceeding. After liquid
stops flowing from the drain valve, leave valve open and
continue. Remove the drain plug located on the bottom of
the pump housing. Do not reinstall plug or close drain valve
until re-assembly is completed. Failure to follow these
instructions could result in property damage and/or moder-
ate personal injury.
2. Remove the Hex Coupler Guard as follows (see figure 8):
a. Remove the two cap screws that hold the outer (motor
side) coupler guard to the support bracket(s).
b. Spread the outer guard and pull it off the inner guard.
NOTE: Do not spread the inner and outer guards more
than necessary for guard removal. Over spreading the
guards may alter their fit and appearance.
c. Remove the cap screw that holds the inner guard to the
support bracket.
d. Spread the inner guard and pull it over the coupler.
8
COVERPLATE
FOR 1 1 / " SEAL
4
1 13 / "
32
FOR 1 5 / " AND
8
2 3 / " SEAL 1 1 / "
8 4
SEAL LOCKING COLLAR
SEAL CAP BOLTS
FIGURE 12
1510-D
MOTOR END
O-RING
3. Loosen set screws in both coupler halves and slide each
half back as far as possible on its shaft. Remove coupler
sleeve. Where a full diameter impeller is used, it may be
necessary to remove the pump side coupler half and to
slide the motor back on its base in order to gain sufficient
clearance to remove the pump assembly from the volute.
4. Remove support foot capscrews. Loosen volute cap-
screws, do not remove them. Use capscrews in the jack
screw holes (Not on 8G). Loosen the pump assembly from
the volute.
WARNING: EXCESSIVE PRESSURE HAZARD
Make certain internal pressure of the pump is relieved
before continuing. Failure to follow these instructions could re-
sult in serious personal injury or death, or property damage.
Remove seal flushing tube, if used.
Remove the volute capscrews and remove the pump
assembly from the volute.
Continue to the section which pertains to your pump type.
1510 and 1510-F
With Standard Mechanical Seal – Figure 9
5. Remove the impeller capscrew, lock washer and washer.
Remove the impeller.
6. Remove the rotating portion of the seal, use a screwdriver
to loosen the rubber ring.
7. Remove the seal insert along with the insert gasket and
retainer (if used).
8. Thoroughly clean the shaft sleeve and the coverplate seal
cavity. Inspect for surface damage like pitting, corrosion,
nicks or scratches. Replace if necessary.
O-RING