Quote:
Originally Posted by Adamsvr
Get some Caterpillar Hydraulic fluid additive and use it to replace your existing hydraulic fluid. Run the Jack's up and down two or three times and you should be good to go, unless you have a leak. Vic
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Good advice if one is experiencing popping noises emanating from their jacks. The popping can be caused by "Stiction" of the ram seals.
Drifting or UN-authorized movement of the rams is attributed to often more serious issues.
Stiction is the static friction that needs to be overcome to enable relative motion of stationary objects in contact.[1] The term is a portmanteau of the term "static friction",[2] perhaps also influenced by the verb "stick".
Any solid objects pressing against each other (but not sliding) will require some threshold of force parallel to the surface of contact in order to overcome static cohesion. Stiction is a threshold, not a continuous force.
In situations where two surfaces with areas below the micrometer range come into close proximity (as in an accelerometer), they may adhere together. At this scale, electrostatic and/or Van der Waals and hydrogen bonding forces become significant. The phenomenon of two such surfaces being adhered together in this manner is also called stiction. Stiction may be related to hydrogen bonding or residual contamination.
Many have also cured the popping by using the same repeated up / down movement of the jack rams after a light coating of silicone which also helps protect the ram surface(s).
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