Quote:
Originally Posted by Rsander5
So you are saying that the jack system is always on and sensing the hydraulic pressure? So when the pressure falls below a certain threshold, the system comes on and pumps the system back up to hold the jacks in the up position?
Seems like a strange design. I would have thought, that the jacks would be in a "locked - up" position such that if you disconnected the hoses the jacks would not fall.
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It is all done by three system pressure switches. If you use auto level, the system grounds each jack in a set sequence set by the tilt. The grounding pressure is 300 psi. The system over pressure lock out is 3000 psi. When raising the jacks, the system shuts down when the system pressure is 1,500 psi. Any time the ignition is on, the parking brake is not set, the trans is shifted out of park or neutral, or the system pressure drops below 500 psi the system will go into emergency retract mode. Due to the jack's design there twice as much down force as up force per psi hydraulic pressure. Just to make things there are four red pressure hoses for down pressure and only two yellow hoses for retraction. The LCI Power Pear maintenance course is 66 hours long. Few techs ever attend, but it is all on the internet. <https://lci-support-doc.s3.amazonaws.com/technical-information-sheets/leveling-and-stabilization/kwikee/pg_hydraulic_leveling_troubleshoot_lr.pdf>
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