The main role of hydraulic jacks is lifting and supporting, and the pressure is relatively large, and long-term use may be damaged due to improper operation or tool fatigue. If it continues to be used, it may cause safety accidents, and below we will list the damage symptoms of hydraulic jacks that need to be replaced for easy inspection.

(1) There is a fracture on any of the ferrules and rolling elements.

(2) There are significant jamming wounds on the rolling pavement, flanging and rolling body.

(3) The cage is significantly worn or the rivet is significantly loose.

(4) There is rust and damage on the raceway surface and rolling body.

(5) There are serious indentations and cracks on the raceway surface and rolling body.

(6) There is obvious creep on the inner diameter of the inner ring or the outer diameter of the outer ring.

(7) The discoloration caused by heat is obvious.

(8) The hydraulic jack sealed with grease, the sealing ring or dust cover is obviously damaged.

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