TM 5-3805-281-24-1
Theory of Operation
BUCKET FLOW CONTROL VALVE OPERATION
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boom up function is actuated the boom up pilot
The bucket flow control valve (I and J) restricts oil flow
pressure signal (E) flows through pilot valve A to shift
to the bucket cylinder in the combined operations of
pilot valve B (H) closing the passage from the poppet
bucket, arm in, and boom up to ensure supply oil flow
valve (B). The pressure on the back side of the poppet
goes to the higher-loaded boom function to raise the
valve increases closing the poppet valve causing a
boom.
restriction for supply oil flow through the poppet valve
to the bucket valve (G). Pilot valve A (E) is located on
When arm in function is actuated the arm in pilot
the bottom pilot cap for Arm II valve.
pressure signal (F) also shifts pilot valve A (D). If
Continued on next page
CED,TX08227,3168
1903JUN981/2
