TM 10-4320-344-24
2.16.19 Start Switch Maintenance, Model US636HCCD-1.
This task covers:
2.16.19.1 Removal
2 .
1
6 .1 9 . 3 I n s t a l l a t i on
2 .
1
6 .1 9 . 2 T e s t
INITIAL SETUP
Tools
Equipment Conditions (Continued)
General Mechanic’s Automotive
Battery disconnected, paragraph 2.15.2.
Tool Kit, Appendix B, Section
III, Item 1
Control Panel Cover Assembly removed,
paragraph 2.16.2.
Multimeter, Appendix B, Section
III, Item 2
General Safety Instructions
Material/Parts
To prevent rolling or sliding, do not work
on equipment that is not securely
Tags, Appendix C, Item 31
s t a b i l i z e d .
Lock Washers (TM 10-4320-344-24P)
Do not work on equipment with battery
Equipment Conditions
connected.
Electrocution hazard is
Pumping station shut down, TM
present if battery is connected.
10-4320-344-10.
Do not work on equipment without following
standard shop safety precautions.
2.16.19.1 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 .
Remove two screws (Figure 2-70, 1), lock washers (2), and three wires (3).
Tag wires (3) and discard lock washers (2).
b .
Unscrew rubber button cover (4) and remove start switch (5) from control panel
( 6 ).
2.16.19.2 Test.
a .
Test continuity between switch terminals (7 and 8). Correct reading is
i n f i n i t y .
b.
Push in and hold switch contact button and test continuity between switch
t e r m i n a l s ( 7 a n d 8 ) . C o r r e c t r e a d i n g i s 0.
c .
Replace defective start switch (5).
2.16.19.3 Installation.
a .
Insert start switch (5) in control panel (6) and secure with rubber button
cover (4) .
b .
Install three wires (3), new lock washers (2), and screws (1). Remove and
discard tags.
2-181
