New Holland CX720 Repair Manual page 2463

TRANSMISSION Hydrostatic - Static description (C.20.F - C.30.A.20)
The CX Combine Hydrostatic System contains five main components, an oil reservoir, hydrostatic pump, charge
pump, brake manifold and drive motor.
Some machines are equipped with an optional powered steering axle (PRA).
Oil Reservoir
A single oil reservoir (1) is used for both the hydraulic and hydrostatic systems. The reservoir is located at the upper
left hand side of the machine behind the engine compartment. Each of the hydraulic and hydrostatic circuits have
their own filtering systems.
Hydrostatic Pump
The hydrostatic pump (1) is mounted to and driven by the engine gearbox, the engine gearbox is driven directly by
the engine. The hydrostatic pump assembly includes the charge pump (2) brake manifold (3) charge pressure filter
(4), and charge pressure sensor (switch) (5). The hydrostatic pump also houses the servo displacement valve and
multi function valves.
Charge Pump
The charge pump (2) is mounted to the rear of the hydrostatic pump assembly (1), and houses the charge pressure
relief valve.
Brake Manifold
The brake manifold (3) is mounted directly onto the hydrostatic pump assembly (1) The brake manifold is used to
protect the engine and hydrostatic pump from overspeeding during hydrostatic stop or when driving down hill in too
high a gear.
Hydrostatic Drive Motor
The hydrostatic motor (1) is mounted to the main transmission and is driven hydraulically by the hydrostatic pump.
The hydrostatic motor supplies the drive input to the main transmission.
POWER TRAIN - TRANSMISSION Hydrostatic
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