TM-9-2815-220-24
AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TM-9-2815-220-24 - Page 90 of 1563
TM 9-2815-220-24
THEORY OF OPERATION
0004 00
TRANSMITTERS
Engine Models 2CA & 2DA
A
C
Low Oil Pressure Warning Light Switch:
The low oil pressure warning light switch
(A) is located at the lower right side of the
crankshaft damper and oil filter housing.
The electrical contact points in this switch
close when the oil pressure in the main oil
gallery is below 11 ± 2 psi.
Completion of
the electrical circuit lights the low pressure
warning lamp on the vehicle instrument
panel.
B
Oil Temperature Transmitter:
The oil temperature gauge transmitter (B) is
located at the upper right side of the
crankshaft damper and oil filter housing
above the oil pressure regulator valve.
B
Engine Model 2DR
A
C
High Oil Temperature Warning Light Switch
The high oil temperature warning light
switch (C) is located in the oil passage above
the oil pressure warning light switch in the
right side of the crankshaft damper and oil
filter housing.
The warning light sending
switch thermostatically-controlled electrical
contact points close when oil temperatures in
the engine main oil passage reaches
245 ± 5 °F.
Completion of the electrical
circuit lights the oil high temperature
warning lamp on the vehicle instrument
panel.
WP 0004 00-28
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