Maintenance
3-5
DISASSEMBLING AND REASSEMBLING THE JET ASSEMBLY
1.
To disassemble the jet assembly:
a
Disassemble the cold cap water line feedthrough compression seals by
removing the nut, follower, gasket, and female coupling located at the side of the
pump. (See figure 3-2 for a section drawing of a typical jet assembly)
b
Remove the block which secures the cold cap to the jet assembly.
c
Lift out the cold cap.
d
Unscrew the hex nut above the top cap and remove it.
e
Lift the jet assembly out with a chain fall attached to the cross member now
visible in the jet.
f
Once the jet is out of the pump, unscrew the two nuts on the cross member to
release the lower jet stages.
g
Disassemble and clean as required.
2.
To assemble the jet assembly:
a
Reverse the steps outlined above.
3-6
HEATER REPLACEMENT
3-5
CAUTION
Poor clamping resulting in inadequate thermal contact may result in
reduced heater life and poor pump performance. Tighten nuts finger-
tight on clamping plate, then gradually and evenly tighten them to 250
in-pounds.
WARNING
High voltages (up to 480V) can kill. Always break the primary circuit to
the power supply before starting to work on the heater and/or its wiring.
a
Determine which heater element has failed at the junction box, then disconnect the two
corresponding leads from the terminal strip. Pull the leads out of the terminal box then out
the elbow cover plate.
