Magnum MLT4150, Operating Manual, Page: 16 / 44

16
RAISING THE MAST WITH ELECTRIC WINCH OPTION
1. Set up and level the unit. Refer to “Light Tower Set
Up” on page 14 .
WARNING
The unit must be leveled with the
outriggers extended before raising the
mast. The outriggers must remain
extended while the mast is up. Failure
to level the unit or extend the
outriggers will severely reduce the
stability and could allow the unit to tip
and fall.
2. Remove mast cradle locking pin from mast cradle (A).
3. Check the mast cables for excessive wear or dam-
age. Make sure the cables are properly centered in
each pulley (B). Check the electrical cord for damage.
WARNING
Do not start the unit if insulation on the
electrical cord is cut or worn through.
Bare wires in contact with the mast or
frame may energize the unit and cause
electrocution. Repair or replace a
damaged cord.
4. Make sure the area around the unit is clear before
raising the mast to the vertical position.
5. Remove the safety pin from the mast lock bar (C).
Press the lower winch control switch (D) upward to
raise the mast into the vertical position. Hold the
switch until the mast lock is engaged. The mast lock
bar should snap into place automatically. Secure the lock with the safety pin (E).
Note: a limit switch on the mast tube will disconnect power to the lower electric winch to prevent deadheading the
winch.
6. Press and hold the upper winch control switch (F) upward to telescope the mast to the desired height. Extend
the mast slowly, making sure that the coiled electrical cord is extending at the top sections of the mast. If, for
any reason, the winch cable begins to develop slack or any of the mast sections get stuck,
STOP IMMEDIATELY
and contact an authorized service center.
CAUTION
Do not extend the mast beyond the colored mark on the middle mast tube (G). A limit switch
on the main mast section will disconnect power to the upper electric winch to prevent
overextending the mast.
7. Rotate the mast by loosening the locking knob at the bottom of the mast (H). Turn the mast until the lights face
in the desired direction and then tighten the knob.
WARNING
Never raise or lower the mast while the unit is operating. Never remove the safety pin or
release the mast lock while the mast is up. Releasing the lock will cause the mast to fall.
G
B
B
A
F
D
C,E H
DETAIL C
DETAIL D
DETAIL E
DETAIL F
STOP
DETAIL G DETAIL H
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