TM 5-6675-316-14
4-20.3 Adjust Y-Axis Chain.
MOS: 41B, Topographic Instrument Repair Specialist
TOOLS: 9/64 in. Hex Head Key Wrench
a.
Turn power off.
b. Set carriage clutch switch to OFF.
c.
Turn screws on left and right side equal amounts. Turning to right
tightens chain.
Turning to left loosens chain.
Seven spring washers are
limited.
d. Turn power on and
NOTE
under each bolt.
Amount of adjustment is
set carriage clutch switch to ON.
e.
Rotate Y-axis control knob to bring optical mount forward and back.
Chain jumps sprockets if too loose. Carriage jerks if too tight.
f. Readjust if necessary.
4-60