TM 5-5420-280-23&P
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LIMIT SWITCHES MAINTENANCE (Contd)
ADJUSTMENT (Contd)
NOTE
All limit switch arm levers on KA5, KA6, and KA8 are adjusted
the same way. Only the position of the lever and setting of the
limit of travel on each limit switch may change.
Limit switche KA5 is mounted on A-frame and the lever is
adjusted in the straight position lined with switch housing.
5.
KA5 Limit switch (3)
a. Adjust limit switch arm (2) so roller (1) contacts ramp edge of upper bridge half when lifted by
winch.
b. Limit switch KA5 stops winch when lifting upper bridge half to upper position.
NOTE
Limit switch KA6 must be adjusted to 8 upwards position from
the straight postion.
6.
KA6 Limit switch (3)
a. Adjust limit switch arm (2) so roller (1) contacts secondary boom arm when secondary boom arm
is fully lowered.
b. Limit switch KA6 stops secondary boom, activates launch boom to go up during launch then
stops secondary boom, and lastly, activates launch boom to lower during retrieval.
c. Check adjustment by carrying out launch step L13 (first stop of secondary boom) and retrieve
step 10 (first stop of secondary boom must be within 6.0 10.0 in. (160260 mm) from X position.
NOTE
Limit switch KA8 must be adjusted with lever flush with inner
edge of the guide channel on the A-frame. Limit switch KA7 is no
longer used and has been removed.
7.
KA8 Limit switch (3)
a. Adjust limit switch arm (2) so roller (1) contacts ramp edge of bridge half when it contacts pallet
A-frame channel (4).
b. Limit switch KA8 stops bridge at base of pallet A-frame and then activates winch to lift upper
bridge half until it contacts limit switch KA5.
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