Periodic inspection, Instructions for repairing mechanical seal, Dimensions and weights – Bell & Gossett P86074A Booster Pumps User Manual
Page 5
PERIODIC INSPECTION
Bell & Gossett Booster Pumps are designed to provide years
of trouble free service. It is recommended that periodic in-
spections be made to check for potential problems with the
PERIODIC INSPECTION
pump. If any leakage or evidence of leakage is present repair
or replace the unit.
the motor housing. Gently tap the face plate evenly
around its diameter to drive it into the recess provided in
the motor housing.
1
8. Clean the shaft and sleeve before installing the new seal.
1
9. Slide the new carbon seal head onto the shaft sleeve until
it contacts the seal seat. Slide the new “O-Ring” and
back-up ring along the shaft sleeve until they fit inside the
counter bore in the seal head. Place the seal spring
between the back-up ring and the seal cage while posi-
tioning the seal cage flush with the end of the sleeve.
Place the small end of the spring against the back-up ring.
The three driving legs of the seal cage should engage the
three slots on the seal head. While holding the rotor
assembly with the screwdriver, thread the impeller onto the
shaft in a counter clockwise direction. Tighten the impeller
with light hand pressure. Take care to avoid bending a
rotor cooling fin or damaging the shaft sleeve.
10. Clean the recess in the pump body and install a new body
gasket.
11. Install the pump in the body and secure with four cap-
screws. Apply torque evenly in a criss cross pattern in 40
in-lb (4.52 N
•
m) increments to a torque of 80 in-lb (9.04 N
•
m).
12. Reinstall into the system using new flange gaskets. For
instructions, see sections “PUMP INSTALLATION” and
“WIRING INSTRUCTIONS” on pages 2 and 3.
INSTRUCTIONS FOR REPAIRING
MECHANICAL SEAL
1
1. Follow steps 1 through 4 of section titled “REMOVAL OF
PUMP FROM EXISTING SYSTEM FOR REPLACEMENT.”
1
2. Loosen the four capscrews that hold the motor housing to
the pump body. Remove these screws and remove the
housing from the pump body.
1
3. Place the pump on a flat work surface and insert a screw-
driver into one of the endplate ventilation slots until it
engages one of the rotor cooling fins. While holding the
rotor with the screwdriver, turn the impeller clockwise.
Note that the impeller is molded around a metal hub with a
left hand thread. Remove the impeller from the shaft.
1
4. Remove the seal assembly from the shaft by sliding it off
the shaft sleeve.
1
5. Clean the seal seat with a clean rag and inspect for groov-
ing or cracks. If it shows no grooving or cracks, it may be
cleaned and reused.
1
6. If the seal seat is to be replaced, the face plate must be
removed from the motor housing. Remove it by gently pry-
ing it away from the housing.
1
7. Remove the seal seat and cup. Lubricate the cup with
soapy water and install new parts in the face plate recess.
DO NOT USE GREASE/OIL. Reposition the face plate on
5
A
E
D
B
C
4
9
/
16
(116)
FLANGE
APPROX.
MODEL
SIZE
MOTOR
DIMENSIONS – INCHES (MM)
SHPG. WT.
NUMBER
INCHES – NPT
HP
A
B
C
D
E
LBS. (KG)
PL-36VS
3
/
4,
1, 1
1
/
4
& 1
1
/
2
9
1
/
4
(235)
6
3
/
8
(162)
7
3
/
4
(197)
4
3
/
8
(111)
4
5
/
8
(117)
13.1 (6.0)
PL-45VS and PL-50VS
1, 1
1
/
4
& 1
1
/
2
1
/
6
9
3
/
4
(248)
8
1
/
2
(216)
7
15
/
16
(202)
4
5
/
8
(117)
4
5
/
8
(117)
14.5 (6.6)
PL-75VS
2
11 (279)
8
1
/
2
(216)
8
3
/
8
(213)
5
3
/
16
(132)
4
5
/
8
(117)
18.5 (8.4)
DIMENSIONS AND WEIGHTS
Dimensions are approximate and subject to changes. Contact factory for certified dimensions.