TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
8.
OIL TEMPERATURE LIGHT DOES NOT OPERATE PROPERLY (MODEL A ONLY)
(continued).
OIL TEMPERATURE SWITCH TEST
(1) Open hydraulic cabinet cover.
(2) Loosen four screws and open
main junction box cover.
NOTE
Screws in bracket may need
to be loosened to remove
switch.
(3) Slide oil temperature switch out
from between mounting bracket
and hydraulic manifold.
CAUTION
Electrical power must be shut
off from circuit before conti-
nuity can be checked. Fail-
ure to comply with this cau-
tion may result in damage to
test equipment or electrical
system.
WIRING REMOVED FOR CLARITY
(4) Set multimeter to ohms
position.
NOTE
A reading of infinity indicates
the switch is open; zero or
very low resistance indicates
OIL
that the switch is closed.
TEMPERATURE
SWITCH
(5) Connect multimeter leads to
main junction box terminal strip,
BRACKET
positions 1 and 2.
~
(6) Apply heat to the face of the oil
temperature switch. Observe
readings on multimeter to
HYDRAULIC
determine if switch is opening
MANIFOLD
and closing.
OIL
TEMPERATURE
SWITCH
4-137
Change 1
