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Bedding the Ladder -706880087
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TM-5-4210-233-14-P-1 Firfighting Truck 100 Ft. Aerial Ladder 1000 GPM Manual
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Using Emergency Hydraulic Pump -706880089
TM 5-4210-233-14&P-1
2-14. AERIAL LADDER SET-UP - Continued
i. Disengaging PTO.
(1)
Use the THROTTLE CONTROL to bring the engine speed to idle.
(2)
Shift the transmission into N (neutral).
(3)
Shift the ELECTRIC PUMP SHIFT switch to the ROAD position and wait for the green OK TO PUMP
light to go off and the red PUMP NOT IN GEAR light to come on.
(4)
Activate the HIGH IDLE switch.
(5)
Bed the ladder and retract the outriggers.
(6)
Deactivate the HIGH IDLE switch.
(7)
Deactivate the AERIAL PTO switch.
(8)
Deactivate the AERIAL MASTER switch.
2-15. EMERGENCY AERIAL PROCEDURES. In the event that the main hydraulic pump becomes inoperable
a emergency hydraulic pump is available that can be used to assure continued operation of hydraulic functions.
a.
General Information. The emergency hydraulic pump is driven by an electric motor that is
powered by 1 2-volt batteries. It is activated by the switches located on the ladder and outrigger control panels.
Because the emergency pump is not an on-demand, variable displacement type pump, it should not be
operated unless a hydraulic function is required. This prevents possible burn-out of the electric motor that
drives the hydraulic pump. The emergency pump runs at a slower speed than the main hydraulic pump.
Because of this, the hydraulic functions will operate at a slower speed when the emergency hydraulic pump is
used.
CAUTION
To avoid equipment damage, do not operate emergency
hydraulic pump without the proper hydraulic valves engaged.
To prevent the emergency hydraulic pump from burning out, it
should only be used a maximum of five minutes and then
allowed to cool for 60 minutes, or damage will result.
The manual diverter valve is only intended to allow operation of
hydraulic functions if the electric valve system malfunctions. To
avoid equipment damage, do not use manual diverter valve to
override the electrical interlock system.
2-60

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