Doosan DA40 - Page 583

SHOP MANUAL
HYDRAULIC
Ch 5 page 2 Ch 5 page 3
HYDRAULIC
Components, capacities and oil types .............................................. 5
Hydraulic system main function. .....................................................................................................6
Hydraulic System Description .........................................................................................................7
Hydraulic System Components ......................................................................................................7
Hydraulic parts view DA30 / DA40 ..................................................................................................8
Main Valve Circuit ...........................................................................................................................9
Main Valve - List Of Components .................................................................................................10
Hydraulic System pressure ........................................................................................................... 10
Main Valve - Orifices .....................................................................................................................11
Main Valve - Spare Parts & Torques .............................................................................................13
Tilt valve - Exploded .....................................................................................................................16
Hydraulic circuit DA30 ..................................................................................................................19
Hydraulic circuit DA40 ..................................................................................................................21
Startup test procedure ..................................................................... 23
Main Pump ......................................................................................... 24
Pump description .......................................................................................................................... 24
Test block ...................................................................................................................................... 25
Main pump pressure adjusting .....................................................................................................26
Main pump pressure adjusting .....................................................................................................27
Main pump circuit .........................................................................................................................28
Main pump parts list .....................................................................................................................29
Main pump exploded view ............................................................................................................31
Main pump section drawing .........................................................................................................33
Pump, disassemble - assemble the shaft .....................................................................................35
Steering system ................................................................................. 36
Steering Master Valve (Orbitrol) ...................................................................................................37
Steering Pressure Adjustment ...................................................................................................... 40
Steering valve ...............................................................................................................................41
Steering circuit DA30 / DA40 ........................................................................................................42
Steering Cylinder ..........................................................................................................................43
Steering cylinder, sectional drawing. ............................................................................................45
Emergency steering pump ...........................................................................................................46
Tilting system .................................................................................... 49
Tilt Lever .......................................................................................................................................49
View of the tilting system ..............................................................................................................50
Tilt cylinders: ................................................................................................................................. 51
Tilt cylinder, sectional drawing. .....................................................................................................53
Fan system ......................................................................................... 54
Fan Drive Motor ............................................................................................................................55
Disassemble the fan and fan motor ..............................................................................................56
Brakes ................................................................................................. 57
Brake circuit view ..........................................................................................................................57
Hydraulic system
Index