jcb Mini CX - Page 169

Page No.Contents
Section E - Hydraulics
E-i E-i
Technical Data
General Data ............................................................................................ E-1
Service Procedures
Hydraulic Contamination .......................................................................... E-5
Cleaning Operation ................................................................................... E-7
Operation Description
Introduction to Hydraulic Schematic Symbols .......................................... E-9
General Description ................................................................................ E-15
Transmission Pump Operation - Series 1 Machines .............................. E-17
Transmission Pump Operation - Series 2 Machines .............................. E-19
Transmission Motor Operation 2WD ...................................................... E-23
Transmission Operation - Series 1 Machines ......................................... E-25
Transmission Operation - 2WD Series 2 Machines ................................ E-28
Transmission Operation - 4WD Series 2 Machines ................................ E-31
Typical Valve Spool Operation ................................................................ E-37
Main Relief Valve Operation ................................................................... E-41
Circuit Diagrams
Series 1 Machines, JCB (+) pattern controls .......................................... E-43
Series 1 Machines, ISO (+) pattern controls .......................................... E-45
Series 2 Machines, JCB (+) pattern controls - 2WD ............................... E-47
Series 2 Machines, ISO (+) pattern controls - 2WD ............................... E-49
Series 2 Machines, JCB (+) pattern controls - 4WD ............................... E-51
Series 2 Machines, ISO (+) pattern controls - 4WD ............................... E-53
Towing/Winching
Preparing for Towing/Winching ............................................................... E-55
Problem Solving
Hydrostatic Transmission ....................................................................... E-59
Loader/Excavator Circuit ........................................................................ E-70
Pumps
Pump Assembly Series 1 Machines ....................................................... E-73
Transmission Pump - Series 1 Machines ............................................... E-75
Transmission Pump - Series 2 Machines ............................................... E-80
Service Pump ......................................................................................... E-89
Drive Motors
Axle Drive Motor ..................................................................................... E-99
Wheel Drive Motors .............................................................................. E-104
Valves
Loader Valve ......................................................................................... E-131
Excavator Valve .................................................................................... E-133
Typical Spool ........................................................................................ E-137
Stabiliser Spool ..................................................................................... E-138
Excavator Auxiliary Valve ..................................................................... E-139
Pressure Testing ................................................................................... E-140
Rams
Typical Ram .......................................................................................... E-145
Slew Ram .............................................................................................
E-151