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G-660C & G-880C GRADALL (Crawler)
OPERATION & MAINTENANCE
PILOT PUMP FEED CIRCUITS
PILOT PUMP FEED CIRCUITS
PILOT PUMP CIRCUIT: Oil from the pilot pump
(1) feeds the pilot manifold (2) where the flow is
directed to several functions. Oil is routed to the
swing brake sequence valve (5) the boom assist valve
(7) the two speed selector valve (11)
and to the joystick console (3), the tilt pedal valve (4)
and the travel and steer joystick (6).
5
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