New Holland CX720 Repair Manual page 36

DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM
(26) Drum Variator Adjustment Plunger
Operated via the drum variator valve, the plunger is a hydraulic cylinder that operates a floating disc within the variator
assembly to alter variator speed.
(28) Unloading Tube Lockout Block
Isolates the unload cylinder from the control valve and pipework. Ensures that the unload tube will remain in the
required position until the control valve is activated. When pressure oil is applied to the lock out block, a bleed line is
supplied to the opposite side which releases the lock valve and allows oil to escape. When the pressure oil is removed
the lock out valves close and prevent cylinder movement.
(29) Unload Tube Cylinder
Operates the unload arm, controlled by the unload tube control valve and lock out block.
(31) Quick Attach Couplers
Connects the main stack valve block to the header valve block assembly.
(31a) = Pressure supply
(31b) = Return line
(31c) = Load sensing line
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