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TM 9-2320-364-34-2
6-86
6-12. ELECTRICAL PROPORTIONAL ANALOG CONTROL (EPAC) REPLACEMENT
AND ADJUSTMENT (CONT).
(7)
Start engine.
(8)
Remove dust cap (9) from EPAC (10).
Turning trim pot too far
clockwise may cause the engine
to overheat if not carefully
monitored.
NOTE
Truck should be at
operating temperature (190
degrees F [88 degrees C]) to
make adjustment.
A 3/4 turn clockwise
increases engine water
temperature 15 degrees F
(4 degrees C).
A 3/4 turn counterclockwise
decreases engine water
temperature 15 degrees F
(4 degrees C).
(9)
Set multimeter to volts DC.
(10)
With the aid of an assistant, take
multimeter reading and engine water
temperature reading from water
temperature gage (11). Readings should
match as shown on Table 6-2.
(11)
If readings do not match, perform Step
(12).
(12)
With aid of assistant, turn trim pot (12)
until voltage reading on multimeter
matches the value listed in Table 6-2.
(13)
If reading still does not match, repeat
Steps (10) through (12).
(14)
Shut off engine and install dust cap (9) on
EPAC (10).
22.00
16.00
12.00
10.00
170 (77)
175 (79)
185 (85)
190 (88)
VDC
Temp F(C)
Table 6-2. EPAC Readings
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