Jlg/gradall g6-42a

Hey guys looking to see if there’s any kinda of parking brake adjustments on this lull, it has the integrated internal brakes an they work great, but when application of electric parking brake applied the lull want hold itself, I do believe that the parking brake is spring applied when button is mashed. The service manual refers ya to another manual for the axles. Thx. Serial number is 0160000373

Brakes are spring applied hydraulically released. If the machine is rolling with parking brake on or machine off you got two possible issues. One the brakes/ friction plates themselves are just worn thin and wont hold. Or the seal is leaking internally. Pull you axle fill plug and see if your axle is over full. If so drain it to the fill port level then run machine. If it is full again or past the level you drained it to for reference then your leaking through. Next option would be to drain the axle and remove the brake inspection plugs under each axle tube and gauge the thickness of the brake disks between each friction plate and see how much material is left.

Chris what is your axle make and email address .I can send the book.