Bird Technologies 8630B Series - Manual (Page 39)

Maintenance
23
Pump/Motor
Removal
For removal of the pump motor, it should not be necessary to remove
the load resistor. Drain the unit of coolant by unscrewing the drain
plug on the lower rear panel, then remove the fan panel and rear
panel as follows:
1. On the 8630, release the fan panel by removing the 18 pan head
screws surrounding it. When free, it should not be necessary to
detach the terminal block connections to the fan; lay the panel to
the side.
On the 8630B, disconnect the two flow switch connectors, the two
quick-connects from the thermoswitch, the orange wire from the
front panel terminal block, and the red wire from the time delay
relay. Then disconnect the fan power cable connector. Be sure to
note the location of each wire for reassembly. The fan panel may
now be removed by removing the 18 pan head screws that attach
it to the unit.
2. Detach the back panel by, using a crescent or 7/8" hex socket
wrench, removing the two large hexagonal bolts that fasten the
coolant level gauge to the back panel.
3. Pull the coolant gauge off the panel.
4. Remove the 16, 8/32 screws, to free the panel.
5. Make note of, or mark, all wire connections before detaching.
6. Detach the 3-wire cable from the 3-lug terminal block on the inside
of the front panel. For reference, the color codes of the motor
supply wires generally match the twistlock (8630) or the power
(8630B) input wires, with the green going to the blue (8630) or the
green/yellow (8630B) ground wire from the socket (8630) or the
power entry module (8630B). Refer to Figure 8.
7. Release the hose clamp nearest the pump on the input hose and
carefully loosen the hose from the 90° input elbow at the center of
the helical pump head. In the same manner, loosen the output
hose from the straight-up fitting on the pumps helical outlet.
8. Reach under the input elbow with a screwdriver and loosen the
clamp band on the drain tube at the base of the volute. Free the
tube completely from the fitting
9. Use a 9/16" hex socket extension wrench or a small flat-end
wrench, to remove the two 3/8-16 nuts from the base studs holding
the motor feet. Lift the motor slightly to clear the studs, then
carefully inch the pump assembly forward while detaching the
hoses. The freed assembly may be lifted from the equipment out
the open side. Remove the wires, if needed, but make note of the
connections for assembly.