TM 10-4320-344-24
2.16.22 Rheostat Replacement, Models 609-C and US636HCCD-1.
This task covers:
2.16.22.1 Removal
2 .
1
6 .2 2 . 2 I n s t a l l a t i o n
INITIAL SETUP
Tools
General Mechanic’s Automotive
Tool Kit, Appendix B, Section III,
Item 1
Solder Gun, Appendix B, Section III,
Item 2
Material/Parts
Solder, Appendix C, Item 25
Tags, Appendix C, Item 31
Equipment Conditions
Pumping station shut down, TM 10-4320-
344-10.
Equipment Conditions (Continued)
Control Panel open (609-C).
Control Panel Cover Assembly removed,
paragraph 2.16.2 (US636HCCD-1).
General Safety Instructions
To prevent rolling or sliding, do not work
on equipment that is not securely
s t a b i l i z e d.
Do not work on equipment with battery
connected.
Electrocution hazard is
present if battery is connected.
Do not work on equipment without following
standard shop safety precautions.
Battery disconnected, paragraph 2.15.3,
(609-C) or 2.15.4 (US636HCCD-1).
This procedure applies to the lights dimmer rheostat on Model 609-C. The
procedure for the Model 609-C auto throttle rheostat and Model US636HCCD-1
manual throttle select rheostat is similar.
2.16.22.1 Removal.
Do not work on equipment with battery connected. Electrocution hazard is
present if battery is connected. Failure to obey this warning may result in
death or serious personal injury.
a .
Tag and desolder wires (Figure 2-73, 1).
b .
Loosen set screw (2) and remove knob (3).
c .
Remove nut (4), lock washer (5), and rheostat (6) from control panel (7).
2.16.22.2 Installation.
a .
Install rheostat (6) in control panel (7) and secure with lock washer (5) and
nut (4).
b.
Install knob (3) on rheostat (6) and secure with set screw (2).
c .
Solder wires (1) to rheostat (6). Remove and discard tags.
2-187
NOTE
