TM 10-4320-344-24
2.21.19 V-Belt Contact Switch Maintenance, Models 609-C and US636HCCD-1.
This task covers:
2.21.19.1 Testing
2 .
2
1 .1 9 . 3 R e p a ir
2.21.19.2 Removal
2.21.19.4 Installation
INITIAL SETUP
Tools
General Mechanic’s Automotive
Tool Kit, Appendix B, Section
I I I , Item 1
Multimeter, Appendix B, Section III,
Item 2
Materials/Parts
Loop Clamp (TM 10-4320-303-24P)
Equipment Conditions
Pumping station shut down, TM 10-
4320-344-10.
Battery disconnected, paragraph
2.15.3 (609-C) and paragraph 2.15.4
(US636HCCD-1).
Equipment Conditions (Continued)
V-Belt Guard and Mounting Stud removed,
paragraph 2.21.11 (US636HCCD-1).
General Safety Instructions
Do not work on equipment that is not
securely stabilized to prevent rolling
o r s l i d i n g .
Do not work on equipment with battery
connected.
Electrocution hazard is pre-
sent if battery is connected.
Do not work on equipment without follow-
ing standard shop safety practices.
2.21.19.1 Testing.
To prevent electrical shock, use caution when performing this test.
Ensure V-belts are in proper position.
a.
Disconnect connector (Figure 2-134, 1) from V-belt contact switch (2).
Pin numbers are
b .
Test resistance from pin 1 to pin
i n f i n i t y .
c .
Test resistance from pin 2 to pin
located in connector.
2 and pin 1 to pin 4.
Correct reading is
4.
Correct reading is 0.
d .
Push in and hold contact button (3) on V-belt contact switch (2).
e .
Test resistance from pin 2 to pin 1 and pin 2 to pin 4.
Correct reading is 0.
f .
Test resistance from pin 1 to pin 4.
Correct reading is infinity.
g .
Release contact button (3).
h.
Replace defective V-belt contact switch (2).
i .
Connect connector (1) to V-belt contact switch (2).
2-305
NOTE
NOTE
