Check your bolts to see if they are Grade 5 or Grade 8. Grade 8 bolts have a torque specification of up to 120 ft/lbs. On my 3710FL from the factory I noticed 5 jacks had Grade 8 bolts and one had Grade 5???
See this link from Lippert:
https://lci-support-doc.s3.amazonaws...cd_0001840.pdf