312C and 312C L Excavator VA Boom Controls Caterpillar


VA Boom Controls
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312C and 312C L Excavator [SEBU7565]
HYDRAULIC SYSTEM
VALVE GP-CONTROL
312C and 312C L Excavator VA Boom Controls

The VA boom extends the working range of the machine by hydraulically increasing or reducing the angle of the boom. The VA boom is equipped with a hydraulic check valve to prevent the boom from falling in case a hydraulic line breaks.




Illustration 1g00827090

Switch for VA boom


On - Push the top of the switch in order to activate VA boom control.


Off - Push the bottom of the switch in order to deactivate VA boom control.



Illustration 2g00575819

(1) Lock pin

(A) This position is not used.

(B) LOCKED position

(C) VA BOOM position

The VA boom pedal is located to the left of the travel pedals.



VA Boom Extend - Push down on the front of the pedal in order to extend the VA boom.



VA Boom Retract - Push down on the rear of the pedal in order to retract the VA boom.



Illustration 3g00826120

(A) Left joystick

(B) Right joystick

(7) VA boom

The joysticks for tool control may be used with the VA boom.


VA Boom Extend - Push control (7) forward in order to extend the boom.


VA Boom Retract - Push control (7) rearward in order to retract the VA boom.

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