click below
click below
Normal Size Small Size show me how
Accumulators
Actuator and Accumulator Basics.
Question | Answer |
---|---|
A check Valve can be used to? | By pass a Restriction, Isolate an accumulator, as a Pressure control. |
A hydropneumatic Accumulator seperates Nitrogen Gas from oil by? | A Bladder, Piston or Diaphram. |
Oil flowing out of the precharge(Schrader Valve) usually indicates? | Bladder, Diaphram or Piston Seal damage. |
Uses for an Accumulator in Mobile hydraulic machinery are? | Develop Flow, Mqaintain Pressure, Absorb Shock. |
Can an accumulator work if the machine if shut off? | Yes |
To service an accumulator the technician should? | Lock out, Tago out, Deenergize and verify the entire machine is at an energy Zero state. |
To reinstall an accumulator on a machine the tech should? | Lubricate the oil port of the accumulator, introduce Nitrogen Gas slowly. |
Why do we typically find Dry Nitrogen and the gas portion of an accumulator? | Inert gas non flamable, not an accelerant and not affected by changes in temperature. |
typical causes of accumulatore failures are? | Improper mounting, Clamping issues, Excessive or inadequate precharge. |
Teesting of hydraulic motors is performed by? | Testing all components associated with the motor circuit except the motor. if they all pass testing the motor is faulty. |
in a Hydraulic motor circuit Torque is? | Pressure |
In a hydraulic motor circuit Speed is? | FLow |
Do single rod double acting cylinders extend faster than they retract? | no! |
the major area within a cylinder can provide? | High force, Low Speed |
a Linear Actuator is a? | Hydraulic Cylinder Providing straight line mechanical motion. |
A Rotary Actuator is a? | Hydraulic Motor providing rotart motion. |
If you leave the bucket of a loader in the air unsupported by saftey lockouts while servicing the machine is the machine completely deactivated? | No. there is still potential energy from gravity working on the loader arms and bucket. |