If the steps are not bent or anything is interfering with them then try lubricating all the pivot points first. Otherwise the problem could be in the gear box. Kwikee is now a division of Power Gear and parts are still available.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7