Snorkel TB42J, Operato'S Manual

Page: 24 / 68

Chapter 6 – Controls
20 TB42J – 0172310
Note
The emergency power system is for lowering the platform
during an emergency and is not intended for normal ma-
chine operation.
If the engine is running, it will stop when the switch is
placed in the emergency power position.
Throttle Switch
The throttle switch (refer to Figure 6.2) is used to set the
engine throttle speed to either low or high idle.
Place the switch in the low position for normal machine
operation and in the high position for engine operation or
hydraulic system warm-up.
Cummins engines have a two speed throttle operation
from the lower controls. When the throttle switch is in the
low position the engine is at idle. Placing the switch in
the high position increases the engine speed to mid-range.
Placing the ground controls switch in the on position also
increase the engine speed to mid-range.
Deutz engines have a two speed throttle operation from
the lower controls. When the throttle switch is in the low
position the engine is at idle. Placing the switch in the
high position increases the engine speed to high throttle.
Placing the ground controls switch in the on position does
not increase the engine speed on Deutz engines.
Circuit Breaker Reset Buttons
The lower control panel electrical system has a circuit
breaker for the throttle, run, and main circuits. There is a
reset button for each circuit breaker below the lower con-
trol panel (refer to Figure 6.3).
Figure 6.3 – Lower Control Gauge Panel
The upper control panel has a circuit breaker for the swing,
lift, drive and main system circuits. The circuit breakers
are on the front of the upper control panel (refer to Figure
6.4).
Hold the switch to the right to rotate the turntable coun-
terclockwise. Hold the switch to the left to rotate the turn-
table clockwise.
Boom Elevation Switch
The boom elevation switch (refer to Figure 6.2) is used to
raise or lower the main boom. The switch is spring re-
turned to the center off position.
Hold the switch up to raise the main boom. Hold the
switch down to lower the main boom.
Boom Switch
The boom switch (refer to Figure 6.2) is used to extend or
retract the tip boom. The switch is spring returned to the
center off position.
Hold the switch to the left to extend the tip boom. Hold
the switch to the right to retract the tip boom.
Jib Articulation Switch
The jib switch (refer to Figure 6.2) is used to raise or
lower the jib. The switch is spring returned to the center
off position.
Hold the switch up to raise the jib. Hold the switch down
to lower the jib.
Note
The jib and platform rotate functions can not be oper-
ated at the same time. The platform rotate function will
override the jib function.
Platform Level Switch
The platform level switch (refer to Figure 6.2) is used to
level the platform floor with respect to the ground. The
switch is spring returned to the center off position.
Hold the switch up to tilt the platform floor upward or
away from the ground. Hold the switch down to tilt the
platform floor downward or toward the ground.
Platform Rotator Switch
The platform rotator switch (refer to Figure 6.2) is used to
rotate the platform relative to the end of the tip boom. The
switch is spring returned to the center off position.
Hold the switch to the right to rotate the platform counter-
clockwise. Hold the switch to the left to rotate the plat-
form clockwise.
Note
The jib and platform rotate functions can not be oper-
ated at the same time. The platform rotate function will
override the jib function.
Engine/Emergency Power Switch
Hold the engine/emergency power switch (refer to Figure
6.2) down to operate aerial platform functions using the
emergency power system. Release the switch to disen-
gage the emergency power system.
Circuit Breaker Reset Buttons