The running gear on a trailer — axles, spindles, bearings, brakes, springs, and the frame steel that ties it all together — does all the work while nobody looks at it. When something gives out, the whole trailer is off the road. Ames Hydraulics does running gear repair on trailers of every kind in central Iowa: farm wagons, gooseneck flatbeds, dump trailers, enclosed cargo, and heavy commercial. Free pickup within 60 miles of Ames.
What Actually Fails on Running Gear
Most running gear repair we do falls into a few reliable buckets. Bearings and hubs fail from lack of service or moisture. Spindles bend or spin when a bearing seizes and takes the spindle with it. Springs sag, break, or the shackles get sloppy. Frame steel — particularly at the spring hangers and axle mounts — cracks from years of load. And brakes, where the trailer has them, wear like brakes anywhere else.
What We Repair
- Trailer axles — straightened, replaced, or upgraded to a heavier rating
- Spindles — replaced when bent or spun
- Wheel bearings, races, seals, and hubs
- Electric and hydraulic trailer brakes
- Springs, shackles, equalizers, and hangers
- Cracked frame steel at spring hangers and axle mounts welded and reinforced
- 7-way wiring and brake controllers at the trailer end
Farm Wagons, Ag Trailers, and Grain Carts
A huge share of Iowa running gear repair is on ag equipment: grain wagons, gravity boxes, gooseneck header trailers, hay racks, and grain carts. This equipment lives on gravel, gets loaded heavy, and rarely sees a pavement mile. The failures are predictable: bearings, spindles, and cracked frame welds. Bring the piece in during the off-season and we’ll rebuild the whole running gear at once so you don’t lose a day at harvest to a wheel bearing.
Full Service or One Problem at a Time
Some customers want everything checked and everything serviced. Others want the specific thing that failed fixed and nothing more. We do both. Tell us up front what you want — a full running-gear rebuild, or just the axle that’s giving you trouble — and we’ll quote accordingly. No upsells that don’t earn their keep.
Free Pickup Within 60 Miles
If the trailer isn’t safe to tow, we come to it — free within 60 miles of Ames. Text a photo of the trailer and the failure to 515-292-2599 and we’ll tell you the same day what your running gear repair needs and roughly what it will cost.
Get the Trailer Rolling
See our full hydraulic repair, welding & fabrication, and trailer repair services. Call or text 515-292-2599 or bring the trailer to 210 Freel Dr in Ames. Open Monday through Friday, 7AM to 5PM.
What Owner-Inspection Should Include
You can catch a lot of running gear repair before it becomes a roadside failure by looking at a few things once a season: grease the bearings and note whether they take grease easily; look at the spring hangers for cracks in the weld; check the tire wear pattern (uneven wear points at axle problems); and pump each brake to feel that all the wheels respond. Anything that isn’t right is what to bring us.
Upgrading Axles and Ratings
Some running gear repair is really an upgrade — a trailer originally built for 7,000 lb axles that’s now hauling loads that call for 10,000 lb axles. We can uprate a trailer if the frame will take it, or tell you honestly when the frame is the limiting factor and further upgrade is going to cost more than a new trailer. Every trailer has a rating, and running past it is where the frame cracks come from.
Documented Repair for Commercial Trailers
Commercial-plated trailers and any trailer that shows up on a DOT roadside inspection benefits from documented running gear repair. We can hand back written service records of what was checked, what was replaced, and what the axles measured before and after. That paper is worth having when an inspector asks.
Trailer Running Gear — What We Actually Mean
When Iowa farmers, contractors, and heavy-haul operators say running gear repair, they mean the axles, spindles, hubs, bearings, springs, suspension hangers, and frame steel that carry a trailer. Not gymnastics equipment, not exercise gear — the mechanical guts underneath a trailer. This is welded and machined structural work with wheel-end mechanical repair, which is exactly the shop we run. Free pickup within 60 miles of Ames.
How Much Does Trailer Running Gear Repair Cost?
Bearings and seals on a single axle run typically $150-$400 all-in. A spindle replacement (bent or spun spindle) is $500-$900 including welding and machining. Full axle replacement on a heavy trailer is $1,200-$2,500. Frame welding at cracked spring hangers or axle mounts runs $300-$800 depending on how much steel needs to come out and go back in. A complete running gear repair job that touches everything — axles, brakes, springs, and frame — on a beat-up ag trailer is usually $2,000-$5,000. Every quote is in writing, up front.
How Long Does It Take?
Bearing/seal service turns same-day for a trailer that comes in the morning. Axle or spindle replacement is 2-4 days depending on parts. Frame welding is 1-2 days once we start. Complete running-gear overhauls on ag and heavy trailers are typically a full week in the shop. If you have a hard deadline — harvest, construction schedule, DOT inspection — tell us up front and we build the schedule around it.
Farm Wagons, Grain Carts, Gooseneck Flatbeds, Heavy Trailers
Central Iowa running gear repair work is heavy on ag equipment. Grain wagons, gravity boxes, gooseneck header trailers, hay racks, and grain carts all live on gravel roads under heavy load, and they all wear the same way: bearings first, spindles second, and welded steel at spring hangers third. We also do the same work on commercial heavy trailers — dump trailers, low-boys, side-dumps — where the load ratings are bigger but the failure modes are the same.
Signs You Need Running Gear Repair
- Wheel that runs hot after a highway pull — failing bearing, low on grease, or seized
- Grinding or clicking noise from a wheel — bearing or spindle damage
- Tire wearing unevenly — scrubbing sideways — axle out of alignment or bent
- Trailer sags at one corner — broken spring or worn shackle
- Visible crack at a spring hanger or axle mount — welded structural work needed
- Brakes that pull one direction or don’t hold the load
Frequently Asked Questions
What does ‘running gear’ mean on a trailer?
It’s the whole assembly under the trailer that carries the load: axles, spindles, wheel bearings, hubs, brakes, springs, shackles, equalizers, and the frame steel at the spring hangers and axle mounts. When someone says ‘running gear repair’ they usually mean any combination of that work.
Can I upgrade my trailer to heavier axles?
Sometimes yes, sometimes no. It depends on whether the trailer frame can safely take the higher rating. We can assess your trailer, tell you honestly whether an upgrade makes sense, and if it does, install heavier axles, springs, and hardware. If the frame is the limiting factor, we’ll tell you rather than let you overload a trailer that will fail.
How often should I service trailer bearings?
For farm trailers running on gravel and hauling grain heavily, once every 1-2 years. For heavier commercial trailers with more highway miles, once a year. Signs it’s overdue: wheel running hot, grease darkened and thin, or the last service is unrecorded.
Do you do trailer brake service too?
Yes. Electric brakes on smaller trailers, hydraulic brakes on some heavier trailers, and air brakes on commercial heavy trailers — we do all three. See our air brake repair page for the air-brake-specific work.
Can you weld cracked trailer frame steel?
Yes, this is one of the specific reasons trailer running gear repair often comes to us rather than a general trailer shop. Frame cracks at spring hangers, axle mounts, and hitch points are welded and reinforced with the right procedure and steel. Done properly, the welded joint is stronger than the original.
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Written by Josiah Ragsdale
Owner, Ames Hydraulics — Ames, Iowa
Josiah owns and operates Ames Hydraulics. He has worked on hydraulic and heavy equipment since he was 18, and every hydraulic cylinder his shop rebuilds is pressure tested before it ships back to the customer. More about Josiah →
Got something broken? Call or text 515-292-2599