SHOP MANUAL
Ch 5 page 3
HYDRAULIC SYSTEM
Components, capacities and oil types .............................................. 6
Hydraulic system main function. .....................................................................................................7
System pressure .............................................................................................................................8
Hydraulic parts view DA 40 (Two Pumps) .......................................................................................8
Main Valve - Spare Parts & Torques ...............................................................................................9
Hydraulic circuit DA40 (Two pumps) .............................................................................................15
Startup test procedure ..................................................................... 17
Pumps ................................................................................................. 18
P1 and P2 description ..................................................................................................................18
Test block ...................................................................................................................................... 19
Pump P1 pressure adjusting ........................................................................................................20
Pump P2 pressure adjusting ........................................................................................................22
Pumps circuit ................................................................................................................................24
Pumps parts list ............................................................................................................................ 25
Pump exploded view.....................................................................................................................27
Pumps, disassemble - assemble the shaft ...................................................................................31
Steering system ................................................................................. 32
Steering Master Valve (Orbitrol) ...................................................................................................33
Steering Pressure Adjustment ...................................................................................................... 36
Steering valve ...............................................................................................................................37
Steering circuit DA30 / DA40 ........................................................................................................38
Steering Cylinder ..........................................................................................................................39
Steering cylinder, sectional drawing. ............................................................................................41
Emergency steering pump ...........................................................................................................42
Tilting system .................................................................................... 45
Tilt Lever .......................................................................................................................................45
View of the tilting system ..............................................................................................................46
Tilt cylinders ..................................................................................................................................47
Tilt cylinder, sectional drawing. .....................................................................................................49
Fan system ......................................................................................... 50
Fan Drive Motor ............................................................................................................................51
Disassemble the fan and fan motor ..............................................................................................52
Brakes ................................................................................................. 53
Brakes circuit view ........................................................................................................................53
Service brakes overview ............................................................................................................... 55
Parking brake, description ............................................................................................................56
Parking brake circuit veiw .............................................................................................................57
Hydraulic system
Index
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