Page No.Contents
Section E - Hydraulics
E - i E - i
Technical Data
General Data .......................................................................................... E - 1
Loader Pump - Standard (P3) .......................................................... E - 1
Loader Pump - High-Flow (P3 and P5) ............................................. E - 1
Charge Pump (P4) ............................................................................ E - 1
Relief Valve Operating Pressures .................................................... E - 1
Transmission Pump ........................................................................... E - 2
Hydraulic Motors - Wheeled Machines .............................................. E - 2
Hydraulic Motors - Tracked Machines ............................................... E - 2
Loader Valve Block - Servo Machines ............................................... E - 2
Loader Valve Block - Manual Machines ............................................ E - 2
Self Level Valve (optional) ................................................................. E - 3
Filters ................................................................................................. E - 3
Rams ................................................................................................. E - 3
Hydraulic Tank ................................................................................... E - 3
Operation Description
Introduction to Hydraulic Schematic Symbols ........................................ E - 4
General (Basic and Functional Symbols) .......................................... E - 4
Control Valves ................................................................................... E - 8
Example of Schematic Circuit ........................................................... E - 9
Neutral Circuits ..................................................................................... E - 10
Standard Machines .......................................................................... E - 10
High-flow Machines .......................................................................... E - 11
Loader Circuit .................................................................................. E - 12
Transmission Circuit ........................................................................ E - 12
Servo Circuits .................................................................................. E - 12
Transmission Pump Operation ............................................................. E - 13
Charge Pressure ............................................................................. E - 13
High Pressure Relief Valves ............................................................ E - 13
Transmission Motor Operation ............................................................. E - 15
Loop Flushing System ..................................................................... E - 15
2 Speed Operation (optional) .......................................................... E - 15
Servo Transmission Operation ............................................................. E - 16
Neutral ............................................................................................. E - 16
Forward ........................................................................................... E - 17
Reverse ........................................................................................... E - 18
Right Spin Turn ................................................................................ E - 19
Loader Valve Operation ........................................................................ E - 20
Neutral Circuit .................................................................................. E - 21
Shovel Tilt ........................................................................................ E - 22
Lift Arm Raise .................................................................................. E - 23
Lift Arm Lower ................................................................................. E - 24
Self Level Valve .................................................................................... E - 25
Loader Arm Raise - Self Levelling ................................................... E - 25
Tilt Ram Fully Extended .................................................................. E - 26
Loader Arm Lower ........................................................................... E - 26
Tilt Ram Extend ............................................................................... E - 27
Tilt Ram Retract ............................................................................... E - 27
Power Management System (P.M.S.) ................................................... E - 28
Operation ......................................................................................... E - 29
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