PTO Clutch Circuit (continued)
The PTO RPM is directly related to engine speed. A gear box located between
the engine and the tandem piston (traction) pump (P1 and P2) includes a 1:0.42
gear reduction and a hydraulically actuated clutch for the PTO.
The gear pump section furthest from the piston pump, gear pump section (P4),
supplies fluid to a variety of circuits including the PTO clutch. Hydraulic fluid from
gear pump (P4) enters the main manifold port P and flows through the steering
priority valve (EC1); refer to
Steering Circuit (page 5–18)
for a full explanation of
the steering priority valve (EC1) operation. Fluid flow continues through the flow
regulator valve (EC2) where it dead heads at solenoid valve (SP1). Fluid is also
sent to one end of the flow regulator valve (EC2) spool. As long as circuit flow is
blocked at solenoid valve (SP1), the flow regulator valve (EC2) spool is shifted
to direct flow to the traction charge, 2 speed drive motor control, brake release,
differential lock and PTO clutch circuits.
When the PTO switch is set to the D
ISENGAGE
position, proportional solenoid
valve (EH) in the main manifold is de-energized and hydraulic flow bypasses the
PTO clutch circuit. Return springs on both sides of the PTO clutch assembly
keep the clutch disengaged and the PTO brake engaged. When the machine is in
Attachment Mode and the PTO switch is set to the E
NGAGE
position, proportional
solenoid valve (EH) energizes and hydraulic flow is directed to a piston in the
PTO clutch assembly. Hydraulic flow pushes the piston away from the PTO
brake to release the brake and toward the PTO clutch to engage the clutch.
Note:
Depending on the programmable attachment settings, raising and
lowering the hitch may also disengage or engage the PTO.
Outcross 9060
Page 5–29
Hydraulic System: Hydraulic Flow Diagrams
18234SL Rev B
Summary of Contents for 07511AA
Page 4: ...Reader Comments Page 4 Outcross 9060 18234SL Rev B ...
Page 18: ...Safety Safety and Instructional Decals Page 1 10 Outcross 9060 18234SL Rev B ...
Page 38: ...Specifications and Maintenance Special Tools Page 2 20 Outcross 9060 18234SL Rev B ...
Page 96: ...Engine Service and Repairs Page 4 24 Outcross 9060 18234SL Rev B ...
Page 208: ...Hydraulic System Service and Repairs Page 5 112 Outcross 9060 18234SL Rev B ...
Page 294: ...Electrical System Service and Repairs Page 6 86 Outcross 9060 18234SL Rev B ...
Page 384: ......