jcb Robot 160 - Page 195

Section E - Hydraulics
Contents
E - ii E - ii
Page No.Contents
Fault Finding
Hydrostatic Transmission ..................................................................... E - 30
Checking for Faulty Pump or Motor ................................................. E - 33
Checking Wheel Speed ................................................................... E - 35
Machine Veers to One Side when Travelling ................................... E - 37
Transmission Pump Neutral Adjustment ......................................... E - 38
Checking Motor Leakage Rate ........................................................ E - 40
Pump Main Relief Pressure Test Points .......................................... E - 41
Testing Main Relief Valves .............................................................. E - 41
Checking the Joystick Hydraulic Lines ............................................ E - 42
Loader Circuit ....................................................................................... E - 43
Levelling Circuit .................................................................................... E - 46
High-flow Circuit ................................................................................... E - 47
Checking Flow and Pressure .......................................................... E - 47
Power Management System (P.M.S.) ................................................... E - 50
Warning Light Indications ................................................................ E - 50
System Check ................................................................................. E - 50
Fault Tracing .................................................................................... E - 51
General ................................................................................................. E - 53
Bleeding the Hydraulic System ....................................................... E - 53
Circuit Diagrams
Standard and High-flow Servo Machines ............................................. E - 54
Component Key ............................................................................... E - 54
Control Variations ................................................................................. E - 56
Component Key ............................................................................... E - 56
Service Procedures
Hydraulic Contamination ...................................................................... E - 57
Hydraulic Fluid Quality .................................................................... E - 57
Effects of Contamination ................................................................. E - 57
Cleaning Operation ......................................................................... E - 57
Contaminant Standards ................................................................... E - 58
Filters ............................................................................................... E - 58
Cleaning Operation ............................................................................... E - 59
Procedure ........................................................................................ E - 59
Pressure Testing
Loader Main Relief Valve (M.R.V.) ........................................................ E - 60
Transmission Charge Pressure ............................................................ E - 62
Power Management System (P.M.S.) ................................................... E - 63
Calibration Procedure ...................................................................... E - 63
To fit Sensitivity Control to Non High Flow Machines ...................... E - 66
Transmission Pumps
Removal and Replacement .................................................................. E - 67
Removal .......................................................................................... E - 67
Replacement ................................................................................... E - 67
Pump/Engine Coupling ......................................................................... E - 70
Dismantling and Assembly ................................................................... E - 71
Input Shaft Seal ............................................................................... E - 72
Output Shaft Cover ‘O’ Ring ............................................................ E - 72
High Pressure Relief Valves ............................................................ E - 72
Charge Valve ................................................................................... E - 73
Start-Up Procedure ............................................................................... E - 74