Contents
ContChamp DRD-S
Technical Handbook
1
S.
Grupp
70
9407
04-10
Group 70
Hydraulic system
Specifications .............................................................................2
Main hydraulics ..........................................................................3
Description ............................................................................3
Overview ..........................................................................3
Electro-hydraulic servo system, principles .......................3
Working hydraulics, feed..................................................4
Servo circuits..................................................................10
Lift ..................................................................................11
Boom extension .............................................................13
Service ................................................................................15
Hydraulic fluid.................................................................15
Hydraulic oil filter............................................................15
Breather filter..................................................................15
Hydraulic fluid filter for the servo hydraulics...................16
Hydraulic fluid filter for the brake cooling circuit.............16
Steering system........................................................................17
Description ..........................................................................17
Steering valve ................................................................18
Priority valve...................................................................20
Brake system............................................................................22
Description ..........................................................................22
Brake system ................................................................22
Cooling circuit.................................................................23
Main components of the brake system ..........................23
Brake system, feed ........................................................24
Hydraulic accumulators..................................................26
Accumulator charging valve ...........................................27
Hydraulic brake pedal ....................................................28
Parking brake .................................................................29
Parking brake valve........................................................29
Service ................................................................................30
Accumulators, checking the pre-charging pressure .......30
Hydraulic oil cooler.........................................................31
Adjusting the WDB brake system...................................33
Cab movement .........................................................................34
Tilt, attachment.........................................................................34
Hydraulic pumps.......................................................................35
Description ..........................................................................35
Variable axial piston pump .............................................35
Vane pump.....................................................................36
Service ................................................................................37
Setting the variable pumps.............................................37
Main valve ................................................................................39
Description ..........................................................................39
Service ................................................................................40
Hydraulic cylinders ...................................................................41
Service ................................................................................41
Repairs to leaking hydraulic cylinders............................41
Lifting cylinder ................................................................42
Telescoping cylinder, main boom...................................43
Damping cylinders, attachment......................................44
Diagrams
Hydraulic diagram, component list ......................................45
Hydraulic diagram, standard (H) ....................... A23056.0400
Hydraulic diagram, separate brake system tank (H)
..................................................................... A23056.0500
Содержание ContChamp DRD S Series
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