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Ground Control Box
Controls for operating the ATB 42/50 from the
ground, are located on the left side of the
turntable.
The number of each control below corresponds to
the control’s call out on the control box illustration.
1. Emergency Stop: Press the red button in, at
any time, under any conditions, and the
entire machine stops - the engine turns off,
the brakes automatically set, and nothing
moves. This switch must be out for anything
on the machine to work.
2. Platform/Ground Selector : Must be in the
GROUND position (down) for the ground
control box to work. The switch MUST be in
the PLATFORM position (up) for the platform
control box to work.
3. Choke/Cold Start: This switch only works for
diesel engines. Gasoline engines have
automatic chokes. Hold the switch UP for 10
seconds then release it just before you start
an engine that is at ambient air temperature
(a “cold” engine). That will cause the glow
plugs to warm the inside top of each cylinder,
thus aiding combustion.
4. Master Key Switch: This switch works like
an automobile ignition switch. Hold it at
START until the engine starts, then release it
to ON. Turn the Master Key Switch to OFF if
the platform is to stay in one position for a
long time, that will turn the engine off and
save fuel.
5. Boom Speed: This control determines how
fast the booms move. Set it to SLOW (turtle)
until you are very familiar with the way the
machine works or if the platform is working in
dangerous or cramped surroundings.
6. Ground Operation: You must manually hold
this switch up any time you use one of the
seven platform moving switches, (switches 7
through 13), to move the platform.
Holding the switch up increases the engine
speed and activates the platform moving
switches in preparation to do work. Set the
switch to FAST IDLE (down position) only
when you need to quickly warm the engine.
Return to IDLE (center position) after engine
warm up.
Control switches 7 through 13 are the platform
moving switches. Each is a three position,
momentary contact, normally OFF switch.
See Nomenclature and Serial Numbers in the
“Specifications” chapter 3, for boom
identification.
7. Main Boom Lift: UP raises the main boom.
DOWN lowers the base boom.
8. Extend/Retract: EXTEND extends the tip
boom out of the base boom. RETRACT
retracts the tip boom into the base boom.
There is no Extend/Retract switch on an ATB
42 because there is no tip boom.
9. Riser Lift: Up raises the upper and lower
riser booms. DOWN lowers them.
10. Jib: UP raises the jib boom. DOWN lowers
the jib boom.
11. Swing: CW (left) rotates the entire turntable
clockwise (as seen from above). CCW (right)
rotates the turntable counterclockwise.
12. Platform Level: UP rotates the platform up
relative to the end of the jib boom. DOWN
rotates the platform down.
13. Platform Rotate: CW (left) rotates the
platform clockwise (as seen from above)
relative to the end of the jib boom. CCW
(right) rotates the platform counterclockwise.
14. Emergency Power: If the engine stops and
cannot be restarted, continuously holding this
switch down activates a small, battery
powered hydraulic pump that supplies
emergency hydraulic power for the machine.
Boom movements will be slow and have long
lag times under EMERGENCY POWER.
DO NOT use this switch for normal operation.
page 6 - 2
ATB 42/50 – 0161987
6. Controls
