Check the motor is hooked up correctly and has pressure and flow.

About Hydraulic Motors

• Purpose of a Hydraulic Motor: Convert hydraulic power into a rotary (rotational) mechanical motion.
• How it works: Fluid enters the motor, pushes rotors, which are connected to a shaft. The shaft can then be attached to a load. 
• When it is used: When rotational work needs to be done. 

Common Component Failure Problems

• Check that the hoses are hooked up correctly. 
  • If motor is unidirectional, hoses should be hooked up in correct direction.
  • If motor is bidirectional, hoses should be hooked up in the direction intended.
• Check pressure and flow.
  • Is motor getting expected pressure?
    • If not, problem is likely upstream.
  • Is motor getting expected flow? Is the flow high enough for the valve to function properly?
    
    • If not, problem is likely upstream.
• Internal components damaged.
  • If hooked up correctly and getting expected pressure and flow, internal components are likely broken or worn out.
  • Rebuild or replace motor.

Troubleshooting Instrumentation/Tools

• How to troubleshoot a hydraulic system
• Using a pressure gauge to troubleshoot a hydraulic system
• Using a flow meter to troubleshoot a hydraulic system

Troubleshooting Step-by-Step Example

Additional Troubleshooting Information

Related Parts: 

• Small Cylinder
• Large Cylinder

Schematic: 

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