(2) Battery pack. The battery pack is secured to the left, sub-side panel and
the main chassis by two brackets. One bracket straddles across the battery pack,
connecting at the chassis and left, sub-side panel with two number 10-32 Keps nuts.
The other bracket, located in front of the battery pack, is secured to the chassis with two
number 10-32 Keps nuts. To remove the battery pack, disconnect the "fast-on" connected
red and black wires from B1 and B2 then remove the four Keps nuts, earlier described,
using the 3/8-inch open-end wrench or a 3/8-inch socket with drive handle. B1 and B2 are
"fast-on" connected in series with a small orange jumper. Reassemble the battery pack by
securing it in place and tightening the four Keps nuts. Connect the batteries, B1 and
B2, in series with the small orange jumper, the black wire to the remaining negative
terminal and the red wire to the remaining positive terminal. Refer to figure
2-1 for the wiring of the battery pack.
(3) Motor and pump assembly. The motor and pump assembly is
mechanically secured to the chassis with six number 10-32 Keps nuts. A flexible coupling joins
the motor and pump shafts together. Each side of the coupling is secured to its
respective shaft by two set screws (1/16-inch hex) stacked one on top of the other.
Stacking prevents the coupling from loosening caused by vibration or temperature
extremes. To disassemble the motor and pump assembly, disconnect the black and red
wires coming from the motor. The black wire is connected to the chassis ground, the
red wire to TB2-6. Disconnect the vacuum tubing from the pump inlet. The motor and
pump can now be disengaged as one unit by removing the six Keps nuts or individually
by removing the stacked set screws and respective Keps nuts. Reassemble as follows.
Mount and loosely secure the motor and pump to the chassis, allowing the coupling to
"float" freely on the shaft. Carefully position the motor and pump shafts for in-line
alignment. Tighten the Keps nuts without disturbing the alignment. Position the motor
shaft so the flat edge will receive the set screw and tighten the respective coupling set
screw to the shaft. Do the same with the pump shaft. Insert and tighten the stacked
(second) set screws in each half of coupling. Connect the red and black wires.
(4) Heat sink number 1. Heat sink number 1 is mounted to the right, subside
panel. It is secured by two number 10 Keps nuts. To disassemble, disconnect the violet
wire going to TB2-6, the white wire going to TB2-5, and the blue wire going to TB2-4.
Use the 3/8-inch open-end wrench to remove the Keps nuts. Reassemble by securely
mounting heat sink number 1 to the right, sub-side panel and then reattaching the violet,
white, and blue wires.