Repair
12 309577T
Disassemble the Pump
1. Shut off , , and heat zones.
2. Flush the pumps. See your Reactor manual.
3. Relieve the pressure. Follow the Pressure Relief
Procedure, page 8.
4. Press . The motor will run until the pumps are
at the bottom of their strokes, then shut off.
5. Turn the main power OFF . Disconnect the
power supply.
NOTE: Steps 6-8 apply to pump A. See FIG. 1. To
disconnect pump B, go to steps 9 and 10. Use dropcloth
or rags to protect Reactor and surrounding area from
spills.
6. Disconnect the fluid inlet (C) and outlet (D). Also
disconnect the steel outlet tube from the heater
inlet.
7. Disconnect the tubes (T). Remove the tube fittings
(U) from the wet-cup.
8. Loosen the star-shaped locknut (G) by hitting firmly
with a non-sparking hammer. Unscrew the pump far
enough to expose the retaining pin under the plastic
finger guard. Push the retaining spring up. Push the
pin out. Continue unscrewing the pump.
NOTE: Steps 9 and 10 apply to the pump B. See FIG. 2.
Use a dropcloth or rags to protect the Reactor and
surrounding area from spills.
9. Disconnect the fluid inlet (C) and outlet (D). Also
disconnect the steel outlet tube from the heater
inlet.
10. Push the retaining spring (E) up. Push the pin (F)
out. Loosen the star-shaped locknut (G) by hitting
firmly with a non-sparking hammer. Unscrew the
pump.
Pump rod and connecting rod move during operation.
Moving parts can cause serious injury such as pinch-
ing or amputation. Keep hands and fingers away from
connecting rod during operation.
A
B
FIG. 1 Disconnect Pump A
FIG. 2 Disconnect Pump B
TI3765a-2
C
U
G
D
T
TI3765a-1
C
F
G
D
E
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