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11
17. With an adequately sized crane, carefully lower
the motor onto the motor adapter, lining up the
electrical conduit connection and the 4 motor
adapter bolt holes, as required.
18. Install the 4 motor hex cap screws, torquing to the
value provided in the “ENGINEERING DATA”
section of this manual.
19. Place the coupling drive pin into the pump shaft
and install the coupling halves onto the motor and
pump shafts. Install the 4 coupling socket head
screws, lock washers and nuts, DO NOT tighten.
20. Position the motor assembly shim between the
coupling and the motor adapter. If the motor
assembly shim is not available, a 0.203" (5 mm)
shim may be used to locate the pump shaft assem-
bly and to set the correct height.
21. Tighten the 4 coupling socket head screws,
torquing screws to values provided in the “ENGI-
NEERING DATA” section of this manual. Tighten
evenly so that the gap between the halves is equal
side to side and top to bottom.
22. Install the 2 coupling guard halves.
1. Close all necessary suction and discharge valves to
isolate the pump from the system.
2. Drain the liquid from the pump by removing the
drain plug and opening the needle valve on the
vent plug.
3. Remove the coupling guards, the 4 coupling hex
cap screws, the coupling and coupling drive pin.
See steps 1-3.
4. Remove the 4 motor hex cap screws (inner
screws) on the seal housing. See step 4.
5. Remove the seal housing plate using the two
tapped holes provided. Threading 2 of the hex
cap screws into these holes and evenly tighten-
ing the screws. Lift and remove the seal housing
between the pump and motor shaft. Exercise care
when sliding the seal housing between the shaft to
prevent damage to the stationary seat. See step 5.
6. Turn the seal housing upside down and remove
the stationary seat and o-ring. Remove and dis-
card the large o-ring used to seal the seal housing
to the pump head. Inspect the seal seat for any
burrs or debris. Make sure that the seat is clean.
Lubricate the new o-ring for the seal seat with a
adequately sized crane, carefully remove the mo-
tor. DO NOT rest the motor on the motor shaft.
5. Remove the 4 tie rod nuts and lock washers.
6. Carefully remove the motor adapter by sliding it
up the pump shaft. Larger units may require an
adequately sized crane to lift the motor adapter.
DO NOT damage the shaft.
NOTICE: EDGES OF THE STAINLESS STEEL PARTS
ARE SHARP. WEAR APPROPRIATE PRO-
TECTIVE CLOTHING.
7. To gain access to the mechanical seal, it is neces-
sary to remove the stainless steel upper plate
which is held in place by an O-ring located under
the plate rim. Place a small block of wood against
the underside of the rim and, while moving
around the rim, tap with a mallet against the block
until the upper plate loosens. Remove the upper
plate and O-ring from the pump casing. Discard
the O-ring.
8. Remove the stationary element from the upper
plate. With a clean cloth, wipe the upper plate
bore clean and inspect for damage. Replace the
upper plate, as required.
9. Remove the top (vented) stainless steel inner cas-
ing. Grasp the pump shaft, below the mechanical
seal, and move it sharply back and forth to free
the first stage from the lower pump body. Remove
the entire stack assembly from the pump external
sleeve.
10. Slide the mechanical seal rotary element, spring
and washer from the pump shaft. Discard the
entire mechanical seal assembly.
11. Lubricate the inside of the new mechanical seal as-
sembly with a quality grade of O-ring lubricant.
12. To install a new mechanical seal rotary assembly,
slide the assembly onto the pump shaft, spring end
first. Be sure the top spring tip is in the hole of the
rotary portion of the seal. DO NOT scratch or
otherwise damage the seal face. With a clean, lint
free cloth, wipe the seal face clean of all lubricant
or debris.
13. Lubricate the outside of the new mechanical seal
stationary element with a quality grade of O-ring
lubricant.
14. Insert the stationary seat into the seal housing
with the seal face out. DO NOT scratch or other-
wise damage the seal face. Insure that the station-
ary seat is fully seated into the seal housing. With
a clean, lint free cloth, wipe the seal face clean of
all lubricant or debris.
15. With a new O-ring, install the seal housing onto
the pump shaft, seating the plate fully and square-
ly onto the pump outer shell.
16. Place the motor adapter over the 4 tie rod bolts,
using an adequately sized crane when required,
and install the 4 lock washers and tie rod nuts.
Torque the nuts, in sequence, to the value pro-
vided in the “ENGINEERING DATA” section of
this manual.
MECHANICAL SEAL OPTIONS
Code
Rotary Stationary Elastomers
No.
A
Carbon
Viton
Mechanical
B EPR
Seal
C
Silicon
Silicon
Viton
D
Carbide
Carbide
EPR
Cartridge
L Carbide Viton
Seal
P Sil/Carbide Aflas
Metal parts on all seals are 316SS. When reordering units with previous seal op-
tions 2, 3 or 5 review application and order new seal option from above chart.
A