Trailer Landing Gear Repair Sacramento CA — Legs, Gearbox & Cross-Shaft, Fixed On-Site

Trailer Landing Gear Repair Sacramento, CA

TL;DR: Landing gear is what holds the trailer nose up when it's uncoupled, and it fails in a handful of predictable ways — a seized or stripped two-speed gearbox, a sheared cross-shaft that spins one leg but not the other, legs bent from a premature drop or yard strike, or a torn-off sand shoe. We come to your yard, dock, or terminal in Sacramento, support the nose independently, and remove-and-replace the failed leg, gearbox, or shaft so the trailer couples and sits level again. Commercial semi-trailers only — no RVs or utility trailers. Call (916) 898-9090 with the trailer type and what it's doing.

When landing gear won't drop, won't retract, or cranks like it's full of sand, the trailer is stuck at the dock and the tractor is stuck with it. We service dry vans, reefers, and flatbeds at fleet yards, distribution docks, terminals, and safe roadside locations across the Sacramento area. The line reaches a dispatcher directly, not a call center. This is trailer support-gear work — for the full range ofmobile commercial trailer service, start at the hub.

We do not service RV, boat, or consumer utility-trailer landing gear, and we do not straighten, weld, or fabricate structure. Bent legs and torn feet get replaced, not heated and bent back.

How Landing Gear Fails: the Common Modes

Most landing gear on a semi-trailer is a two-leg manual set: a crank on the driver-side leg turns a gearbox, the gearbox drives a screw inside that leg, and a cross-shaft ties the second leg in so both raise and lower together. When it acts up, the cause is almost always one of these:

• Seized or stripped gearbox.Water and road grime get into the gearbox, the grease dries out, and the internal bevel gears corrode or strip. You feel it as a gearbox that's notchy, jammed solid, or spinning free without lifting anything. This is the single most common failure.
• Sheared or disconnected cross-shaft.The cross-shaft (and its roll pin or coupling) transmits the crank's motion to the far leg. Shear the pin or twist the shaft and you get the classic "I'm cranking but only one leg moves" — the trailer racks over and jams.
• Bent or binding legs.Dropping the gear while the trailer is still rolling, setting down on uneven or soft ground, or a yard strike bends the outer or inner leg tube. The inner leg then binds and won't telescope, or the whole assembly leans.
• Damaged sand shoe or foot.The sand shoe — the wide foot at the bottom — cracks, bends, or tears off entirely after a hard drop or a curb hit. A collapsed or missing foot lets the leg punch into the pavement and leaves the nose unstable.
• Crank problems.A bent, seized, or missing crank handle is often the quickest fix, but a crank that's suddenly very hard to turn is usually the gearbox or a binding leg talking, not the handle itself.

The failure mode tells us what to replace. Cranking effort alone doesn't — a "hard crank" can be a dry gearbox, a bent leg, or a tweaked cross-shaft, so we check the mechanism before selecting parts.

The Two-speed Gearbox: Why Low Gear Matters

Most trailer landing gear is two-speed, and understanding it explains a lot of complaints. Pull the crank out and you're in high gear: the screw turns fast so you can run the legs up or down quickly with no load on them. Push the crank in and you're in low gear: many more turns per inch, but the extra reduction gives you the torque to lift a loaded nose or break a stuck leg free.

Two failures come straight out of that design. If the gearbox won't shift and you're stuck in high gear, you can't develop enough torque to lift a loaded trailer — it feels like the gear is "slipping." If it's stuck in low, you'll crank forever to raise an empty trailer. Either way the shift dogs or the internal gears are worn, and the gearbox gets replaced as a unit rather than nursed along. Powered and air-assist landing gear exists on some spec'd trailers; we diagnose those on the same visit, but the two-speed manual set is what's under most dry vans and reefers.

R&r or Rebuild? How We Call It

Landing gear parts are sold as complete assemblies, which usually makes remove-and-replace (R&R) faster, cheaper, and more reliable than tearing a corroded unit down at the yard. Here's how the common calls break down.

The honest line is the last row: when the problem isn't the gear itself but the brackets that tie it to the trailer frame — cracked welds, torn gussets — that's fabrication work we don't do on site. We'll tell you plainly and help coordinate the next step rather than bolt a bent bracket back on.

What the Mobile Fix Looks Like

Landing gear is a support component, so the first move is never to touch the gear — it's to take the load off it safely. We support the trailer nose independently, on a tractor fifth wheel, a dock, or rated stands and blocking on solid ground, before any leg, gearbox, or shaft comes off. Only then do we remove the failed part and install the replacement, run both legs through their full travel, confirm the two-speed shift, and check that the trailer sits level and couples cleanly.

A technician arrives with the common landing gear parts — gearboxes, cross-shafts, feet, crank handles, and complete leg assemblies matched to typical trailer models — and the tooling to swap them at the yard. Related work at the trailer nose often shows up on the same call: thegladhands and jumper lines that feed the trailer, atrailer ABS lamp or wheel-speed sensor fault, orair-ride and mechanical suspensionproblems that changed how the trailer sits. Seehow a mobile service call worksfor the full process, or reach24/7 emergency breakdown dispatchif a trailer is stranded.

FMCSA requires every trailer's parts and accessories — landing gear included — be kept in safe operating condition (49 CFR 396.3). From the Sacramento base (95842) we run a 60–75 mile radius across I-5, I-80, US-50, and SR-99, with extended I-80 coverage over the hill toward Reno and Sparks, NV.