TM 9-2350-238-10
OPERATING CRANE–CONTINUED
LEVEL WIND OPERATION
The level wind assembly contains two sens-
ing switches that automatically actuate cab
hydraulic traversing system when tow winch
wire rope is not straight out from tow winch
drum. This action makes sure that there is a
perfect wire rope layup on tow winch drum.
The level wind sensing switches are activated
by level wind switch in cab. When level wind
switch is ON, turning level wind wire rope
slide will automatically traverse cab. There is
no electrical danger to personnel.
1
2
3
4
5
6
Start hydraulic system. Refer to page
2-67.
Open tow winch access door and
operate tow winch to pay out 10 to 15
ft (3.05 to 4.57 m) of wire rope. Refer
to page 2-79.
Adjust level wind, if out of adjustment.
Refer to page 3-51.
Remove quick release pin (1 ) securing
snatch block tray release handle.
Lift up on tray lift handles (2) to support
snatch block weight (approximately 90 lb
(40.8 kg)) and pull tray release handle
(3) to release tray and snatch block.
Lower tray and snatch block. Swing tray
up toward front of boom and secure to
bracket (4) on underside of boom with
quick release pin (5).
l Always wear leather gloves
(item 31, appx B) when han-
dling winch cable. Never
allow cable to run through
hands. Broken wires can
cause painful injuries.
l Any kinks, crushed sections,
or broken strands are poten-
tial weak points and can
cause wire rope failure.
Frayed, kinked, worn, or cor-
roded ropes must be replaced.
Rope is unsafe if three
broken wires are found in
one strand of 6 x 7 rope, six
broken wires in one strand of
6 x 19 rope, or nine broken
wires in one strand of 6 x 37
rope.
7 Pivot snatch block sheave (6) to aline
with tow winch wire rope. Lift snatch
block and release shackle (7) from pivot.
Place tow winch wire rope on snatch
block sheave and reinstall shackle on
pivot.
2-81
