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RV Through-Frame Jack Service in Palm City

Weak jacks, cracked mounts, dead motors. We service heavy-duty through-frame stabilization systems on fifth wheels and large trailers across Martin County. Frame mount repair starts at $175.

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What Is Through-Frame Jack Service?

Through-frame jacks are the heavy-duty leveling and stabilization system found on most fifth wheels and larger travel trailers. Unlike lightweight stabilizer jacks that just reduce wobble, through-frame jacks bolt directly through the chassis frame rails and are built to actually lift and support the full weight of the RV. They're rated anywhere from 6,000 to 12,000 pounds per jack, and they're what keeps your rig solid and level at the campsite.

Through-frame jack service covers the jack motors (electric or manual), the screw drive mechanisms, the inner and outer tubes, the foot pads, and critically, the frame mounting hardware itself. We also service the wiring and control systems on electric models. According to industry data from Lippert, frame mount integrity is the single most important safety factor in any RV leveling system.

In Palm City and across Martin County, we see a lot of corrosion-related through-frame jack problems. The combination of salt air from the coast and Florida's humidity eats at exposed steel, weakening mounts and seizing up screw mechanisms. Regular inspection and lubrication are the best defense, but when damage has already happened, we handle the full range of repairs on-site.

TL;DR

Through-frame jack service covers the heavy-duty leveling jacks on fifth wheels and large trailers. Jack motor replacement costs $200-425, frame mount repair runs $175-350, and full system overhauls are $350-700. We service all brands at your location in Martin County.

Through-frame jack system being serviced on a fifth wheel RV in Palm City FL

What's Involved in Through-Frame Jack Service

1

Mount and Frame Inspection

We check each jack's frame mounting points for cracked welds, elongated bolt holes, rust, and any signs of structural weakness that could compromise safety.

2

Mechanical Assessment

We inspect the screw mechanism, inner tube, bearings, and gear assembly. The jack gets cycled through its full range to check for binding, uneven wear, or play.

3

Repair and Replace

Whether it's a motor swap, new mounting hardware, or a complete jack assembly, we make the repair and torque all fasteners to spec.

4

Level and Load Test

We deploy all jacks under the full weight of the RV, confirm even load distribution, and verify that every jack holds its position without creeping or settling.

Through-Frame Jack Service Pricing

ServicePrice Range
Jack Motor Replacement$200 - $425
Frame Mount Repair$175 - $350
Full System Overhaul (all jacks)$350 - $700
Screw Mechanism Lubrication and Service$75 - $145

Final pricing depends on your jack system and the specific repairs needed. You'll get a firm quote before we start.

Signs Your Through-Frame Jacks Need Service

Through-frame jacks take a beating every time you set up camp. Here are the warning signs that they need professional attention:

Fifth wheel RV through-frame jack system being inspected in Palm City

Through-Frame Jack Service FAQs

How much does through-frame jack service cost in Palm City?

Jack motor replacement runs $200-425 depending on the jack rating and brand. Frame mount repair costs $175-350, and a full system overhaul with new motors and mounting hardware ranges from $350-700. We'll inspect your system and give you a firm price before starting any work.

What is a through-frame jack and why is it different from regular stabilizer jacks?

Through-frame jacks bolt through the actual frame rails of your RV, not just to the bottom of the floor. This gives them a much stronger mounting point and lets them handle the full weight of heavy fifth wheels and large travel trailers. Regular stabilizer jacks only reduce wobble. Through-frame jacks actually lift and level the unit. They're rated for 6,000 to 12,000 pounds per jack depending on the model.

Why is my through-frame jack motor not working?

The most common causes are a burned-out motor from years of heavy use, a stripped gear inside the motor housing, a corroded wiring connection, or a blown fuse in the circuit. We check voltage at the motor first. If it's getting power but not spinning, the motor itself has failed. No voltage means the problem is upstream in the wiring, switch, or control panel.

Can through-frame jack mounts crack or fail?

Yes, and it's more common than people realize. The frame mount takes the entire weight of that corner of the RV every time you level up. Over time, the bolt holes can elongate, welds can crack, and the mounting plate can bend. Florida's humidity promotes rust that weakens the steel. We inspect the mounts during every jack service because a failed mount is a serious safety issue.

How do I know if my through-frame jacks need replacement versus repair?

If the jack motor has failed but the gear mechanism and mounting are solid, a motor swap is all you need. If the inner tube is bent, the gear teeth are stripped, or the frame mount is cracked, you're looking at more extensive work. We always try the least expensive repair path first, but we'll be straight with you if the whole jack assembly needs to come out.

Should I upgrade from manual to electric through-frame jacks?

If you camp often, it's worth considering. Electric jacks save your back and level the RV in minutes instead of cranking by hand at each corner. The conversion involves mounting the new electric jack assemblies to your existing through-frame mounts and running 12V wiring to a control panel. It's a solid upgrade that most fifth wheel owners wish they'd done sooner.

How often should through-frame jacks be serviced?

Inspect and lubricate the screw mechanisms at least twice a year. If you camp regularly or park on soft ground, check the frame mounts for rust or damage quarterly. Electric jack motors should be tested under load annually. In Florida, the combination of salt air and humidity means corrosion builds up faster, so staying ahead of it with regular maintenance prevents expensive failures.

Jacks Need Attention? We'll Come to You

Your through-frame jacks are what keeps your fifth wheel stable and safe. We'll inspect the whole system, diagnose any issues, and give you a firm quote on the spot.

Call 772-271-5270