Snorkel AB50JRT - Manual (Page 43)

■ Platform Control Box
Controls for operating the AB50J from the
platform are located on the platform control box,
with the exception of the foot switch which is on
the platform floor.
The number of each control below corresponds to
the control’s call out on the control box illustration.
1. Emergency Stop: Press the large red button
down 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 pulled to its up
(or out) position if the AB50J is to be
controlled from the platform.
2. 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.
3. Anti-Restart: This switch works like an
automobile ignition switch. Hold it at START
until the engine starts, then release it to ON.
If the engine dies in ON, the key must be
turned to OFF before it will go back to
START. Turn the 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.
4. 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.
5. Drive Range: Switching from LOW to HIGH
changes from low speed and high torque to
the wheels to high speed and low torque to
the wheels. Set this switch to LOW for driving
on loading ramps or other steep grades and
when safety considerations demand slow
deliberate machine movements. Set the
switch to MID for traveling across soft
surfaces when the booms are down and
retracted. Set the switch to HIGH to travel
across hard surfaces when the booms are
down and retracted.
Prolonged driving in HI (3.5 mph, 5.6 km/h),
heats the hydraulic oil.
Periodically check the thermometer at the
hydraulic oil gauge. DO NOT let the oil exceed
200°F (93°C). Stop the engine and let the oil
cool if necessary.
Items 6 through 12 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.
6. Jib: UP raises the jib boom. DOWN lowers
the jib boom.
7. Extend/Retract: EXTEND extends the tip
boom out of the base boom. RETRACT
retracts the tip boom into the base boom.
8. Main Boom Lift: UP raises the main boom.
DOWN lowers the base boom.
9. Riser Lift: UP raises the upper and lower
riser booms. DOWN lowers them.
10. Platform Level: UP rotates the platform up
relative to the end of the jib boom. DOWN
rotates the platform down.
11. 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.
12. Swing: CW (left) rotates the entire turntable
clockwise (as seen from above). CCW (right)
rotates the turntable counterclockwise.
13. Emergency Power: If the engine stops and
cannot be restarted, hold the switch toward
you and a small, battery powered hydraulic
pump comes on to supply 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.
14. Horn: The horn (optional item), is used to
get the attention of people on the ground.
15. Dual Fuel: Before starting a dual fuel engine,
set the Dual Fuel switch to GAS (gasoline),
or LP depending on which you want to use. If
you select LP, be sure to open the valve on
top of the LP tank. To switch fuels while the
engine is running, see the dual fuel system
decal on the platform corner post.
16. Drive/Steer Controller: The Drive/Steer
Controller is a joystick type controller to regulate
the drive and steer movement as follows:
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6. Controls