As Dave55 and Dbrown have stated check the labels on the hydraulic reservoir tank. Mine is also located in the battery compartment and recommends Dexron III or Mercon V or equivalent. Also, the alarm is very sensitive and it doesn’t have to be much below the fill line to set it off. When I had a leaking jack last year I took it to a local truck repair shop and Jayco reimbursed me. Good luck with yours.
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2016 Precept 35S
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