Hydraulic Mining Excavator
CAT 60XX – Zero
Basic Hydraulic - System Description
Matthias Aust - 2011
RH Zero
Service Training
The name “RH-Zero” was invented by Lutz Springer during his activities as technical trainer in our
department.
The RH-Zero describes the basic hydraulics of our hydraulic excavators.
The following pages are not animated in your printouts, so you have to animate them with the
beautiful German “text processing system” which was handed out for the training.
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RH Zero
Service Training
Pump
Cylinders
Pump
Cylinders
Gearbox
Valves
Pump
Cylinders
Pump
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C
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u
p
l
i
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g
Engine
Pump and Tank
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Service Training
Pump, Pressure Test Point and Tank
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Service Training
Pump, Pressure Test Point, Main Valve, Return Filter and TankService Training
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Pump, Pressure Test Point, Main Valve, Return Filter, Bypass Valve and Tank
Service Training
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Pump, Pressure Test Point, Main Valve, Return Filter, Bypass Valve, Cylinder and
Service Training
Tank
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Pump, Pressure Test Point, Main Valve, Return Filter, Bypass Valve, Cylinder and
Service Training
Tank
Extending Cylinder
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Pump, Pressure Test Point, Main Valve, Return Filter, Bypass Valve, Cylinder, Primary Relief Valve and
Tank
Service Training
Extending Cylinder
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Pump, Pressure Test Point, Main Valve, Return Filter, Bypass Valve, Cylinder, Primary Relief Valve and
Tank
Service Training
Retracting Cylinder
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Pump, Pressure Test Point, Main Valve, Return Filter, Bypass Valve, Cylinder and
Service Training
Tank
Where are the Safety Valves???
Retracting Cylinder due to external Force
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Pump, Pressure Test Point, Main Valve, Return Filter, Bypass Valve, Cylinder, Primary Relief Valve,
Secondary Relief Valves and Tank
Service Training
Retracting Cylinder due to external Force
?
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Pump, Pressure Test Point, Main Valve, Return Filter, Bypass Valve, Cylinder, Primary Relief Valve,
Secondary Relief Valves and Tank
Service Training
Retracting Cylinder due to external Force
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Pump, Pressure Test Point, Main Valve, Return Filter, Bypass Valve, Cylinder, Primary Relief Valve,
Secondary Relief Valves and Tank
Service Training
Extending Cylinder due to external Force
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Pump, Pressure Test Point, Main Valve, Return Filter, Bypass Valve, Cylinder, Primary Relief Valve,
Secondary Relief Valves, Tank Return Pressurizer Valves and Tank
Service Training
Retracting Cylinder due to external Force
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Values and Names
Service Training
Cylinder
Valve
Block
Pump
Secondary
Relief
Valve
Secondary
Relief
Valve
330
360
Primary
Relief
Valve
360
10 bar
Tank Return
Pressurizer Valve
Return
Filter
Hydraulic Oil Tank
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Bypass
Valve
2 bar
Pump with variable Displacement
Service Training
Cylinder
Valve
Block
Secondary
Relief
Valve
Variable Displacement Pump
Secondary
Relief
Valve
330
Primary
Relief
Valve
10 bar
Tank Return
Pressurizer Valve
Return
Filter
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Bypass
Valve
2 bar
Pump Cut-Off Pressure 300 bar
Service Training
Cylinder
Valve
Block
Secondary
Relief
Valve
Variable Displacement Pump
Secondary
Relief
Valve
330
Primary
Relief
Valve
Cut-Off
Valve
300 bar
10 bar
Tank Return
Pressurizer Valve
Return
Filter
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Bypass
Valve
2 bar
Pump Cut-Off Pressure 300 bar
Service Training
Cylinder
Valve
Block
Secondary
Relief
Valve
Variable Displacement Pump
Secondary
Relief
Valve
330
Primary
Relief
Valve
Cut-Off
Valve
300 bar
10 bar
Tank Return
Pressurizer Valve
Return
Filter
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Bypass
Valve
2 bar
High Pressure Filter
Service Training
Cylinder
Valve
Block
Secondary
Relief
Valve
Variable Displacement Pump
Secondary
Relief
Valve
330
Primary
Relief
Valve
Cut-Off
Valve
300 bar
10 bar
Tank Return
Pressurizer Valve
Return
Filter
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Bypass
Valve
2 bar
Secondary Relief Valves with Anti Cavitation Function
Valve short before opening
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Valve open due to high pressure
Service Training
Anti Cavitation Function
Service Training
=> Valve sleeve will be lifted up
Valve short before opening
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Anti cavitation function