HYDRAULIC - PNEUMA TIC - ELECTRICAL - ELECTRONIC SYSTEMS - PRIMAR Y HYDRAULIC POWER SYSTEM

BSE2928A

The main filter (3) and the charge filter (1) Figure are only installed tractors with variable displacement pump (CCLS system).

BSE2755A

The main filter (1) and the charge filter (2) Figure are installed tractors with variable displacement pump (CCLS

BAIS06CCM055A V A

Mid -

Mount Remote V

Optional additional remote valves are mounted under the Connected into the high pressure oil line supplied from the hydraulic pump after the trailer brake valve and operated via a joystick control the

84276574A 10/05/2010 A.10.A

HYDRAULIC - PNEUMA TIC - ELECTRICAL - ELECTRONIC SYSTEMS - PRIMAR Y HYDRAULIC POWER SYSTEM High Pressure Hydraulic System, Fixed Displacement Pump - Electrical Switches

BSE3661A

T emperature Switch

Switch Steering Pressure Switch

Pressure Hydraulic System, V ariable

Pump(CCLS) - Electrical Switches

BSE3573A

Low Charge Pressure W arning Switch

Low Oil T emperature Switch

Steering Motor

Intake Filter restriction (vacuum) Switch

There are two types steering motors fitted depending whether the tractor with less Supersteer The with Supersteer models are a Dynamic load sensing type with a variable depending the speed the steering wheel The less Supersteer models use a fixed displacement motor

Steering

Receives high pressure oil directly from the steering motor .

Load Sensing Shuttle V alve.

Located each remote valve the Electronic Draft Control valve and between the trailer brake front pension valve and mid - mounted where the load sensing shuttle valve (2) This allows the function with the highest pressure demand send sensing pressure the load sensing Figure , the variable displacement

84276574A 10/05/2010

V alve Body

Flow Compensating V alve

Pressure Compensator V alve

Load Sensing Line

BSE3660A

With Reference PRIMAR Y HYDRAULIC POWER SYSTEM - Overview (A.10.A)

Operation the closed centre high pressure hydraulic circuit follows: -

The components the high pressure hydraulic circuit are connected their load sensing lines the hydraulic load sensing valve which controls the output the hydraulic

When the trailer remote control hydraulic lift front axle suspension (where fitted) are the load sensing valve variable flow piston compares the pressure the component load sense line with the output pressure the hydraulic pump output pressure less than the combined pressure the load sense line and spring force the flow trol then pump output continues When circuit demand satisfied pump pressure overcomes the combined pressure the load sense line and flow compensating valve spring. This moves the spool the flow pensating valve the allowing control pressure oil directed the variable flow swash plate servo which - strokes the pump adjust output circuit

For a detailed explanation the load sensing operating principle the variable flow piston pump refer Hydraulic pump Fixed displacement pump - Static description (A.10.A)

High Pressure oil fed a subplate the bottom the remote valve stack where directed the T railer Brake valve which has priority for safety The oil then redirected the Electronic Draft Control V alve and the Electro - Hydraulic Remote V Within the subplate a pressure compensating valve which diverts the oil the low pressure system a pressure - bar

High Pressure oil also fed the top the Remote V alve stack through end plate which incorporates a pressure limiting valve and this supplies oil - bar the pilot line galleries the Electro - Hydraulic Remote V alves. Surplus oil from the charge pump the variable displacement pump fed past the bar valve and boosts the pressure the lubrication

Refer PRIMAR Y HYDRAULIC POWER SYSTEM - Overview

FIXED DISPLACEMENT HIGH PRESSURE HYDRAULIC CIRCUIT

84276574A 10/05/2010 high pressure hydraulic systems with fixed displacement all components are connected series and pump flow continually circulating through the hydraulic system even when the circuits are not being The priority operation given the order components the that trailer remote valves and hydraulic

The high pressure hydraulic circuits for tractors installed with mechanically controlled hydraulic lift are shown ures and include the components shown the following Fixed displacement hydraulic pump assembly comprising the high pressure gear pump and steering / low pressure gear pump