CONTROLS AND OPERATION
Push this knob in and pull out the Maxibrake control
knob (item 17) if it becomes necessary to use the air in
the emergency air tank to release the Maxibrakes.
The carrier will have no brakes,
except the Maxibrakes, which are
controlled by the Maxibrake control
valve. Never move the carrier farther
than is absolutely necessary under
these conditions, and avoid steep
grades. Make certain that this knob
is pulled out at all time during normal
17. MAXIBRAKE CONTROL VALVE. Pull this knob out
to release the Maxibrakes. Push this knob in to vent air
from the Maxibrake chambers and apply the Maxibrakes.
This control will return to the applied position
automatically if pressure in the air system drops below
Figure 2-4. Emergency Engine Shut Off
28 psi (1.93 bars).
18. AIR PRESSURE GAUGE. This gauge shows the
pressure of the air in the air system of the machine. In
normal operation, the pressure reading on this gauge
Under no circumstances should the
should range between 105 and 120 psi (7.28.2 bars).
circuit breakers be prevented from
19. LOW AIR PRESSURE LIGHT. When illuminated,
tripping by any means. Overloaded
this lamp indicates that the pressure in the air system is
below the normal safe operating level. Do not operate
extensive damage to the machine
the machine when this light is lit.
and/or could cause injury to
20. EMERGENCY ENGINE SHUTOFF CONTROL (G.
M. ENGINES ONLY). Pull this handle out if the engine
continues to run after the Engine Stop button (item 7) is
depressed or if an abnormal condition should arise.
THROTTLE SELECTOR VALVE.
transfers control of the throttle from the lower to the
upper. Place the lever in the LOWER position when
driving the carrier. Place the lever in the UPPER position
when operating the upper.
If the engine is shut down using the
23. MAIN TRANSMISSION SHIFT LEVER. This lever is
Emergency Engine Shutoff Control,
used to select the gears in the main transmission.
the butterfly valve in the intake
24. AUXILIARY TRANSMISSION SHIFT LEVER.
manifold must be manually reset (see
This lever is used to select the gears in the auxiliary
transmission. The auxiliary transmission should be kept
in the lowest gear range that will allow the machine to
reach the desired maximum speed. Maintaining the
breakers is to protect the various electrical circuits of the
auxiliary transmission in a higher than required range
machine. The circuit which is protected by each circuit
could cause gear tooth failure, due to excessive torque
breaker is marked on the decal above the circuit
from the main transmission.
breakers. An electrical overload will cause the circuit
25. OUTRIGGER/STEERING SELECTOR VALVE.
breaker button to move outward, indicating that the
This valve transfers hydraulic fluid from the engine driven
circuit breaker has tripped. Reset the circuit breaker by
pump to either the power steering system, or the
depressing the button. If the same circuit breaker should
outrigger system. Push the knob in and engage the latch
trip shortly after it is reset, check the circuit protected by
to direct fluid to the power steering system. Pull the knob
the circuit breaker for the cause of the overload.
out to direct fluid to the outrigger system.