Cab seat screws are loose. ~~~~~ Cab seat screws are loose.     #3507 Found cab seat back rest,seat cushion bracket loose.And also found seat cushion underneath bracket dislodge.Reinstall the seat bracket,back rest and seat cushion braket assembly tightened up.Security check hex bolt-ok.Function check cab seat ok. \Done by Zulq/Lincoln.  10/05/21