Finish Thompson GP22/32 SERIES - Manual (Page 4)

4. Visually inspect all parts for damage. Replace any parts that appear
worn or damaged.
• Look for scoring of the seal’s ceramic face.
• Inspect the rotating seal face for wear.
• Check for degradation or chemical attack of any
elastomers and other seal components.
• Look for signs of heat damage (melted plastic) to the
housing cover and impeller’s shaft.
SeAL INSTALLATION ANd PuMP reASSeMBLY
Single Bellows Seal
1. Install the stationary seal face.
a. Lubricate the stationary face’s o-ring with a rubber lubricant
emulsion or soapy water. Keep the polished surfaces of the
seal face clean.
Note: Never use a petroleum product for lubrication.
Doing so will effect the seal elastomer’s performance
after reassembly.
b. Carefully press the stationary face into the housing cover (use
a piece of cardboard to protect the seal while pressing
against the stationary face). The smoothest side of the station-
ary face should be facing outward.
2. Install the rotating face.
a. Lubricate the impeller’s shaft with a rubber lubricant emulsion
or soapy water.
b. Carefully slide the housing cover over the impeller’s shaft.
The side of the housing cover with the pressed-in seal face
should be away from the impeller.
c. Separate the rotating head of the seal from the large spring.
Re-lubricate the impeller’s shaft, then carefully slide the rotating
head of the seal over the impeller’s shaft using a twisting
motion. The carbon side of the rotating face should be toward
and pressed against the stationary head of the housing cover.
CAuTION: The carbon portion of the seal is easily
damaged. Take care not to apply uneven force or crack
the carbon while installing.
3. Install the seal’s spring and spring retainer. Compress the spring and
snap the retaining ring (item #8) into the groove on the impeller’s
shaft.
4. Install the assembled seal, impeller and housing cover onto the
motor bracket.
a. If a cooling collar is being used, slide it onto the impeller’s
shaft at this time. Take care to align the water connections
so they are accessible.
b. Install the impeller socket head bolt and cap with o-ring in a
clockwise rotation.
c. Make certain that the housing cover’s o-ring is in place.
d. Place the impeller housing into position and install the hard-
ware. Tighten the six hex-head cap screws to 90 in•lbs.
Multi-Spring Seal
The basic installation procedure for a multi-spring seal is the same as
for the single bellows seal. The exception is that a multi-spring seal has
four (4) set screws which need to be tightened on the impeller shaft.
double Seal
1. Remove the motor adapter from the motor’s face (it is assumed
that the pump has previously been removed).
2. Install the stationary seal faces.
a. Lubricate the stationary faces’ o-rings with a rubber lubri-
cant emulsion or soapy water. Keep the polished surfaces
of the seal face clean.
Note: Never use a petroleum product for lubrication. Do
ing so will affect the seal elastomer’s performance after
reassembly.
b. Carefully press the stationary faces into the housing cover and
the cooling collar (use a piece of cardboard to protect the seal
while pressing against the stationary face). The smoothest side
of the stationary faces should be facing outward.
Note: If using a special seal material, it is vital that the
special stationary seal face is pressed into the housing cover.
3. Install the rotating faces and cooling collar to the motor adapter.
a. Carefully slide the housing cover over the impeller’s shaft.
The side of the housing cover with the pressed-in seal face
should be away from the impeller.
b. Separate the rotating head of the seal from the spring.
Note: If using a special seal material, it is vital that the
special seal face mates against the housing cover’s sta -
tionary face.
c. Lubricate the impeller’s shaft, and then carefully slide the
rotating face of the seal over the impeller’s shaft using a
twisting motion. The carbon or special side of the rotating
face should be toward and pressed against the stationary face
of the housing cover.
CAuTION: The carbon or special portion of the seal is
easily damaged. Take care not to apply uneven force or crack
the carbon or special material while installing.
d. Place the seal’s spring into position on top of the installed
rotating face.
e. Re-lubricate the impeller’s shaft and then carefully slide the
second rotating face of the seal over the impeller’s shaft
using a twisting motion (the carbon side of the second
rotating face should be facing away from the other rotating
face). This will require some compression of the seal’s
spring.
f. Place the cooling collar’s o-ring into position. Slide the
cooling collar onto the impeller’s shaft, with the stationary face
in the cooling collar pressed against the second rotating face.
Continue to slide the cooling collar until it mates against the
housing cover. Hold the cooling collar in this position. Take
care to align the water connections so they are accessible.
Notes:
1) The seal’s spring must be compressed further in order to
mate the cooling collar and housing cover.
2) Take care not to pinch the cooling collar’s o-ring. If
the o-ring is not properly seated, the cooling collar will leak.
4. Place the pump components onto the motor adapter. While holding
the cooling collar against the housing cover, install the assembly
into the motor adapter. The motor adapter will hold the cooling
collar in place. It will now be necessary to hold the impeller to
keep the seal’s spring compressed.
5. Carefully place the assembly in position to the motor’s face.
a. In a clockwise rotation, install the impeller socket head bolt and
cap with o-ring. It may be necessary to hold motor’s fan with a
screwdriver to keep the motor shaft from turning.
b. Align the motor adapter so that the access hole is straight up.
c. Install and tighten the impeller’s set screws through the access
hole in the motor adapter (it will be necessary to turn the impeller
to expose the holes in the impeller’s shaft).
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