60. TRANSMISSION SHIFTER-Allison Auto
transmission (See Trans Operations
Instructions).
61. TRANSMISSION OIL TEMPERATURE
GUAGE-When oil temperature is in the
Yellow or Red zone, consult an Allison
Service Representative. PTO will not engage
when pressure in transmission is low.
In the lower carrier cab position, pumps are disengaged and throttle and gauges operate
from the lower cab. This is the normal driving position. With the PTO switch (13) in the mid-
position, pumps are engaged and the throttle and gauges operate from the lower cab. The
PTO light (43) will come on once the engine starts. Use this position if you need to drive the
machine while keeping the pumps engaged (for example, pick and carry work). With the
PTO switch in the upper position, pumps are engaged and throttle and gauges operate
from the upper cab. The PTO light (43) will come on once the engine starts. Use this
position for normal craning functions.
T300-1 Pump Engagement Procedure
With this system, only change the PTO switch position with the engine at low idle or with
the engine off. The pumps will not engage, however, until the engine is started.
Note that with either system the LMI in the upper cab will not come on until the pumps are
engaged.
To Disengage Pumps: Shut off the engine, turn the ignition switch (17) back on without
starting the engine (Position āCā). Push the PTO Switch (29) all the way down and let it
spring back to the center position. The PTO light (24) will go out. This is the normal driving
position.
93P/N 12261-683 REVISED: January 2015
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