TM 5-3895-373-20
7.8.
ADJUST/CALIBRATE CONTROL HANDLES - Continued.
A. CALIBRATE - Continued.
3. CALIBRATE LEFT CONTROL HANDLE REVERSE
THRESHOLD AND GAIN.
a. Disconnect electrical connector P31 (3) green
and white wires) on left control handle (4) from
electrical connector J31 (5).
b. Insert positive digital multimeter lead into
terminal B on electrical connector P31 (3).
c. Insert negative digital multimeter lead into
terminal B on electrical connector J31 (5).
d. Move left control handle (4) 0.75 in. (19 mm)
from
neutral
to
reverse
position.
Use
a
combination square and the top of the handle as
references.
e. Digital multimeter should read 6 to 8 mA.
NOTE
The forward threshold potentiometer
(FT)
and
the
maximum
forward
threshold potentiometer interact on each
other.
An
adjustment
to
either
potentiometer will require the other
setting to be checked.
f. If meter reading is less than 6 mA or greater
than 8 mA, using a jeweler’s screwdriver, adjust
left
control
handle
(4)
reverse
threshold
potentiometer (RT) until a reading of 6 to 8 mA is
obtained.
To
increase
mA
reading,
turn
adjustment screw clockwise. To decrease mA
reading,
turn
adjustment
screw
counter-
clockwise.
g. Move left control handle (4) to full reverse
position.
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