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To replace a manual crank-style RV stabilizer jack, choose a compatible replacement, secure the RV, remove the old jack, inspect the mounting surface and install the new jack using the specified hardware. Finish by checking that it extends and retracts smoothly. The key is a secure installation: follow your RV and jack manufacturer’s instructions, and address any mounting damage before putting the replacement into use.
This guide covers manual crank-style stabilizer jacks. Electric stabilizers, landing gear and leveling systems require different procedures.
Stabilizer jacks reduce movement while your RV is parked. They are not designed to level the RV, lift its tires off the ground or support it during a tire change. Never rely on a stabilizer jack to hold the RV up while you work underneath it.
Read the replacement jack’s instructions before starting. If the work requires lifting the RV, follow the RV manufacturer’s lifting and support procedures and use properly rated equipment. Wheel chocks help prevent rolling, but they do not replace the required support.
Gather the tools required for your specific jack and mounting hardware. These may include:
A welded installation may require additional equipment and professional assistance. Check how the existing jack is attached before deciding whether this is a repair you can complete yourself.
Compare the replacement with the jack being removed. Confirm the correct size, style, mounting arrangement and application rather than choosing by appearance alone.
Check that the replacement fits the approved mounting location and has adequate clearance when retracted. Its mounting plate and fastener locations must work with the RV’s installation requirements.
If you are unsure which replacement to order, have your RV’s VIN and the existing jack’s identification information available when contacting your dealer.
Park on firm, level ground and chock the tires before beginning work. Set up and support the RV according to its manufacturer’s instructions.
Retract the damaged stabilizer so it is no longer pressing against the ground. If damage prevents it from retracting or releasing pressure safely, stop and have an RV service technician assess it.
Keep your hands clear of the jack’s moving arms and pinch points throughout removal and installation.
Inspect the attachment points to determine whether the jack is secured with screws, bolts, welds or a combination.
Support the jack before removing the final fastener so it cannot drop unexpectedly. Remove the mounting hardware with the appropriate tools, keeping track of the original mounting position.
Some installations require grinding to release welded attachment points. If yours does, have a qualified technician handle the removal unless you have the training and equipment to complete it safely. Avoid cutting or grinding into the RV frame.
Do not force a damaged jack loose by twisting it against the mounting surface.
With the old jack removed, clean the frame mounting surface and inspect the attachment area.
Look for:
A replacement jack needs a sound mounting surface. If the frame or mounting area is damaged, have it evaluated before continuing.
Before any approved drilling, check behind the mounting surface for wiring, plumbing, gas lines and other components that could be damaged.
Place the replacement jack against the approved mounting location in the correct orientation. Support it while aligning and starting the mounting fasteners.
Install all required hardware according to the replacement jack and RV manufacturer’s instructions. Use the specified fastener type, size and tightening requirements. Avoid overtightening.
For the installation described in Keystone’s stabilizer replacement demonstration, a bolt and nut through at least one of the four mounting holes provides additional retention if another fastener breaks during transit. Confirm that this method applies to your replacement jack and mounting arrangement. It does not replace the other required fasteners.
Do not assume the first fastener can safely hold the jack while you finish the installation.
Once the jack is secured, use the hand crank to check extension and retraction. Follow the jack’s operating instructions and keep clear of moving parts.
Check that:
Use a screw gun only for mounting work where specified. Do not assume it is approved for operating the jack; some manufacturers prohibit power tools for extension and retraction.
If the jack binds, shifts at the mounting plate or will not retract fully, correct the problem before traveling.
Contact your Keystone dealer if you need help confirming the replacement jack or evaluating the mounting area.
Disclaimer: The information contained in this article is deemed to be true and accurate at the time of publication. However, due to the evolving nature of our products and services, there may be changes or updates that occur after this article was published. We encourage users to verify the contents and consult with their dealer or Keystone RV for the most current information. If you have any questions or require further clarification, please do not hesitate to contact your dealer or reach out to Keystone RV directly.