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Service
Training
Basic Hydraulic Components
•
Hydraulic oil specification DIN 51524
Hydraulic oil viscosity
- Below 30°C (86°C) ISO VG46
- Above 30°C (86°C) ISO 68
• Hydraulic tank.................Capacity 12 US gallons (45 liters) Oil Change period 1000 hours
• Suction Strainer.............125 micron, Clean every 1000 hours
• Tandem Gear Pump......Pump Output Combined flow 38 US Gal (142 L/min) at 2200 rpm /MRV 3250 psi
(225 bar)
• Priority Flow Valve........Priority to steering system
• Orbitol Steering Valve...Closed center, load sensing
Relief valve 2540 psi (175 bar) @ 2200 rpm
Shock valves 3250 psi (225 bar)
• Unloader Valve..............Relief valve 207 bar (3000 psi) @ 1800 rpm
• Loader Control Valve.... 2 spools, Controls Loader Beam and Loader Shovel
• Backhoe Control Valve.7 spools, Controls Slew, Boom, Dipper, Bucket, LH/RH Stabilizers & auxiliary.
Relief valve 3250 psi (225 bar) @ 1800 rpm
• Cooler
• Return line filter.............13-micron Filter - change period after 50 hours then every 1000 hours
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