Can you replace leaf springs on-site?

Yes. We can replace leaf springs, center bolts, U-bolts and spring hangers on-site, with the truck on stands. Solid, level ground makes the job faster and safer, so a lot or yard works better than a soft shoulder.

Is it safe to drive with a broken leaf spring?

It's risky, and federal rules don't allow a cracked or broken leaf spring on a commercial vehicle. One broken leaf shifts the load onto the others. That can break more leaves or let the axle move. Call before you drive far on it.

Why does my air ride trailer sit low on one side?

Usually it's a leaking air bag, a leaking fitting or a leveling valve that's stuck or has a bent arm. Sometimes it's a broken spring seat or a bad pivot bushing. A walkaround with the system aired up usually finds it.

Do you do truck alignments?

No. A full alignment needs equipment that doesn't travel. We can replace the worn torque rods, bushings and springs that move an axle out of line. We'll also tell you when an alignment check makes sense afterward.

What causes dog tracking on a semi?

Dog tracking usually comes from an axle that is out of square. The common causes are worn torque rod bushings, a shifted spring pack from a sheared center bolt, loose U-bolts or worn hanger bushings. We replace the worn part, and that fixes the cause.

Truck Suspension Repair, Mobile | Neuman Truck Service

Truck suspension repair usually starts with something you can see. A trailer sits low on one corner, a broken leaf sticks out of the pack, or a split air bag hisses. Neuman Truck Service does that work on-site out of Pine City, on tractors, straight trucks and trailers. That way a cracked spring doesn't have to cost you a day. The service truck comes to your lot, the job site or the shoulder.

Suspension parts carry the load, keep the axles square and decide how your tires wear. When a torque rod bushing is shot or a spring center bolt shears, the axle moves where it shouldn't. You see that as dog tracking, wandering steering and scalloped tires. A quick fix on the worn part saves the tires, brakes and driveline downstream of it.

Suspension Work We Do On-Site

We work on mechanical spring, air ride and walking beam setups on tractors and trailers.

Leaf springs and spring packs: Broken or cracked leaves, shifted packs and sheared center bolts. One broken leaf overloads the rest of the pack, and it rarely stays the only broken leaf for long.
U-bolts: Loose or stretched U-bolts let the axle shift on the spring. We torque new U-bolts to spec. They need another torque check after the first loaded miles.
Air bags (air springs): Split, chafed or dry-rotted bags on drive axles, cab suspensions and air ride trailers, plus the brackets and fittings that hold them.
Height control (leveling) valves: A valve that sticks, leaks or has a bent linkage leaves the truck too high or too low. That hurts driveline angles and handling.
Torque rods and bushings: Worn bushings and bent rods move the axle out of alignment. We replace both fixed and adjustable rods on-site.
Spring hangers, shackles and equalizers: Worn hanger bushings, cracked hangers, elongated bolt holes and worn equalizer bushings on tandem setups.
Shock absorbers: Leaking or blown shocks let springs and air bags bounce. The bouncing pounds everything bolted to the frame.
Trailer suspensions: Spring and air ride trailer suspensions, including trailer air bags, leveling valves, pivot bushings, U-bolts and spring seats.

Truck Suspension Repair: What Happens When You Call

Call (651) 491-4136 and describe what you see and feel. Is the truck leaning, bouncing, pulling, or making a clunk over bumps? A photo of a broken leaf or a flat air bag helps the tech bring the right parts. Then we send a service truck your way.

On-site, the tech checks ride height, inspects every spring, hanger and rod, and listens for air leaks at the bags and leveling valve. You get an estimate before we replace anything. For heavy suspension work, the tech lifts and supports the frame, so solid ground matters. A yard or a truck stop lot is best. On a soft or narrow shoulder, the tech may stabilize the truck and finish nearby.

Signs Your Suspension Needs Attention

Leaning or sitting low: A broken spring, a leaking air bag or a leveling valve that isn't filling the system.
Dog tracking: The trailer or drive axles don't follow the steer axle straight, often because of worn torque rod bushings or a shifted spring.
Uneven tire wear: Cupping, scalloping or one-sided wear that returns every time new tires go on.
Clunks and harsh ride: Worn hanger bushings, loose U-bolts or dead shocks that let metal hit metal.
Air system won't stay up: A leak in an air bag or leveling valve can drain air that you need for the brakes.

Frost Heaves, Potholes and Load Limits in Minnesota

Northern roads are rougher on suspensions than southern ones. Every thaw cracks the pavement. Each spring, potholes and frost heaves appear on county roads and older stretches of US-169, US-8 and US-10, and they find every weak spring leaf. Over the winter, salt and brine rust U-bolt nuts, hanger bolts and spring eyes. Rusted parts are harder to remove and quicker to fail.

Under MnDOT's seasonal load limits, winter load increases let trucks run heavier while the ground is frozen. Then spring load restrictions cut weights during the thaw, usually starting in early March. Heavier winter loads put more stress on springs and hangers, so spring is a good time for a suspension check. Federal rules in 49 CFR 393.207 say no leaf spring can be cracked, broken or shifted. An air suspension can't leak more than 3 psi in five minutes at normal pressure. If you haul gravel or timber out of Moose Lake or up toward Grand Rapids, check those items first.

How Much Does Truck Suspension Repair Cost?

The price depends on the parts and the labor. Swapping one air bag is a much smaller job than replacing both spring packs on a drive axle. A rusted U-bolt or a seized hanger bolt can also add time to a simple repair. Travel and calls at night or on weekends affect the price too.

The tech gives you an estimate up front, before work starts, so you can decide. All suspension work carries a 12-month warranty.

Suspension Work Alongside Other Repairs

A suspension problem usually spreads to other parts of the truck. Worn bushings that let an axle walk will eat tires, so we often pair the job with truck tire repair on the same visit. A cracked hanger or a loose frame bracket may need welding and frame repair before new parts go on. Trailer suspension work fits with the rest of your trailer repair. Broken springs and leaking air bags are also inspection items. If you fix them before a DOT inspection, you save a second trip.

Where We Provide Suspension Repair

Suspension Repair is available 24/7 from our Pine City base to every town below, across Minnesota and northwest Wisconsin. Pick your area for local highways, fleets and contacts.

Minnesota

Wisconsin

Customer Reviews

Feedback

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Called in with a tire emergency and got Ryan on the phone — genuinely great experience. He was insightful, patient, and gave excellent customer service, even though we ended up not using them for the repair. You can tell they run a friendly, helpful shop. Would definitely call them again next time we're in a bind.
Volare Logistics ADMIN★★★★★Sep 17, 2026
Had an air brake problem called the guy he walked me through steps to help me out which I greatly appreciate, he took time out of his day to help so definitely worth 5 stars
Asphaltcowboy21★★★★★Jul 30, 2026
Called about a no start issue at 9 PM Came out within an hour away from his family to help us out was there till 2 AM trying to trace electrical issue ,and then came back in the morning to finish diagnosing and repairing the truck . So grateful . Did not price gouge was very courteous and professional, and went above and beyond.Got us back on the road !
Aleks Fedykiv★★★★★Jul 29, 2026
Fast, knowledgeable technicians did amazing service.
Melissa Bach★★★★★Jul 2, 2026
They answered at 5:30 pm And listened to my issue and took care of my driver at a reasonable price.
Tricia Bahr★★★★★Jun 18, 2026
If you want service done right the first time call these guys, best in the business, and won't leave you stranded.
Jesse Pahl★★★★★Jun 10, 2026
Great service for a great price, highly recommended.
matt clemons★★★★★Jun 10, 2026
I've used Ryan multiple times and has came in clutch in a few emergency situations where my air lines snapped and came out in winter middle of night to repair. Very professional and gets the job done.
Danny Jamison★★★★★May 30, 2025

Suspension Repair FAQs

Questions

Truck wheel hub and brake rotor exposed for brake repair

Can you replace leaf springs on-site?
Yes. We can replace leaf springs, center bolts, U-bolts and spring hangers on-site, with the truck on stands. Solid, level ground makes the job faster and safer, so a lot or yard works better than a soft shoulder.
Is it safe to drive with a broken leaf spring?
It's risky, and federal rules don't allow a cracked or broken leaf spring on a commercial vehicle. One broken leaf shifts the load onto the others. That can break more leaves or let the axle move. Call before you drive far on it.
Why does my air ride trailer sit low on one side?
Usually it's a leaking air bag, a leaking fitting or a leveling valve that's stuck or has a bent arm. Sometimes it's a broken spring seat or a bad pivot bushing. A walkaround with the system aired up usually finds it.
Do you do truck alignments?
No. A full alignment needs equipment that doesn't travel. We can replace the worn torque rods, bushings and springs that move an axle out of line. We'll also tell you when an alignment check makes sense afterward.
What causes dog tracking on a semi?
Dog tracking usually comes from an axle that is out of square. The common causes are worn torque rod bushings, a shifted spring pack from a sheared center bolt, loose U-bolts or worn hanger bushings. We replace the worn part, and that fixes the cause.