A hydraulic puller system needs 3 basic components to function:
Basic components of a hydraulic system
1.Puller
2. Hydraulic Cylinde
3. Pump (Air, hand, self-contained or electric)
The basic operation of a hydraulic puller system makes use of a cylinder that is fitted into the body of the puller. The cylinder replaces the center bolt function of a manual puller.
The technician inspects the component to be removed and selects the proper size puller. Safety precautions are taken in into consideration as the technician secures the jaws of the puller on the application to keep the system in place.
Instead of using a wrench to move the center bolt forward and backward as one would with a manual puller, a pump is used as a power source. The pump regulates the flow of hydraulic fluid.
As the hydraulic fluid pressure builds up, the pressure moves the cylinder forward pushing the ram of the puller to make contact with the shaft of the component being removed.
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