Interpreting Hydraulic Schematics Presented Presented by: Greg Rae – AVADAL INC. INC. Knowledge Management Systems Systems
A. Power Unit
Power Unit Schematic 2. Kidney Loop
3. Main Pumps
1. Reservoir 4. Accumulators
1. Reservoir Heat Exchanger
Tank Breather (2)
Temperature Transducer & Gage
Level Switches
Heater
Cooling Water Control Sensor
Lines
Lines
Lines
Lines
Shapes
Reservoir
Heat Ex Exchangers
Heat Ex Exchangers
2. Kidney Loop Filters
Relief Valve
Pump & Motor
Water Valves Heat Exchanger
Filters
Fixed Volume Pumps
Pressure Compensated Pumps
3. Main Pumps
High Pressure Filter
Unloading Relief
Unloading Relief
Shown Energized
Shown De-Energized
Fixed Volume Pumps
Main Pumps Unloading/Relief
When the solenoid on the unloading / relief valve is energized, the vent port on the relief is blocked and pressure can build to 2,250 PSI. When the solenoid is de-energized, the vent port drains to tank unloading the pump to tank at 0 PSI PSI
