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Troubleshooting and Preventive Maintenance of Hydraulic Systems
Learning to Read the Signs of Future System Failures
Instructed by:
Al Smiley & Alan Dellinger
Hydraulic Pumps
Gear Pump
Relief Valve
Setting the Relief Valve in a Fixed Displacement Pump Circuit
Troubleshooting Fixed Displacement Pump Circuits
Sound Checks
Aeration
Checking the Fixed Displacement Pump
Variable Displacement Pumps
Pressure Compensating Piston Pump
Pump Compensator
Case Drain
Case Drain Flow Method #1
Case Drain Flow Method #2
Pressure Compensating Pump Example
Systems With Relief Valves
Adjustment Procedure
Relief Set Below Compensator
Calculating Heat & Electrical Power
Accumulators
Using the Charging Rig
Checking the Precharge Hydraulically
Types of Accumulators
Example Circuit
Checking the Piston Accumulator
Overcharged
Piston Removal
Undercharged
Bladder Accumulator
Accumulator Dump Valves
Manual Dump Valve
Solenoid Operated Dump Valve
Tolerances In Components
Sources of Contamination
Built In Contamination
Ingressed Contamination
Fluid Sampling
Oil Analysis
ISO Cleanliness Code
Filter Selection
Beta Rating
Filter Placement
Pressure Line Filter
Return Line Filter
Separate Recirculating System
Leakage Control
Causes of Leaks
Proper Clamping
Socket Weld Flanges
Hose Installation
Drain Lines
Other Causes of Leaks
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