Commercial and Heavy Vehicles
Dump Trucks Repair
The short answer
Dump bodies take abrasive load impact, hoist stress, and tailgate hardware abuse that no other truck body sees. Floor wear-through, sidewall bulging, hinge pin elongation, subframe cracking, and cab shield damage are routine. We repair dump bodies, subframes, tailgates, and cab shields with certified welding in Yorba Linda.
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What we see on dump trucks
A dump body is loaded by dropping several tons of abrasive material into it from height, and then it is unloaded by tipping the entire mass out through a hinged gate. Both operations are violent. Aggregate hauling out of the Irwindale and Azusa pits, demolition work across the LA basin, and grading jobs in the Inland Empire put rock, broken concrete, and asphalt into these bodies daily, and the floor takes the impact at the same two or three places every load. Floor wear-through starts at the front of the body where the material lands and at the rear where it drags out during dumping.
The hoist and subframe are the structural half of the story and the half that gets ignored. When the body is raised with an uneven load, or dumped on a side slope, or lowered onto a partially emptied load, the subframe takes twist it was never designed for. Cracks initiate at the hoist mounting and at the rear hinge brackets, and they propagate along the rail. Those are the two locations we clean to bare and inspect on every dump truck that comes in, because a cracked hoist mount is not a repair you want discovered by the truck folding a rail with the body up.
Tailgate hardware is the third area. Pins elongate, latches wear, and the gate stops sealing at the bottom, so material trails on the road. Sideboards get bent by loader buckets. Cab shields take rock strikes constantly. All of it is repairable and all of it is in-house welding and fabrication work at $210 per hour. We do not perform engine, drivetrain, hydraulic system, or DOT inspection work. Body, subframe, gate, shield, liner, and refinish is the scope.
Location: All work is performed at our Yorba Linda facility. We do not offer mobile, roadside, or fleet route service.
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What makes this vehicle different
- Body loaded by impact from height and unloaded by tipping the entire mass, so both cycles are violent
- Floor taking abrasive rock, concrete, and asphalt impact at the same locations every load
- Hoist mounting and subframe absorbing twist from uneven loads and side slope dumping
- Rear hinge pins and brackets carrying the full body mass at the moment of maximum leverage
- Tailgate seal and latch geometry determining whether material trails on the road
- Cab shield positioned to take direct rock strikes during loading
- Sideboards and top rails vulnerable to loader bucket contact at every fill
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What actually fails, and why
Floor wear-through at impact and drag zones
Material lands at the front of the body and drags out at the rear, and those two zones thin out first. Once the floor is holed, the crossmembers underneath start taking abrasive contact directly, which turns a floor repair into a structure repair.
Hoist mount and subframe cracking
Uneven loading and side slope dumping put twist into the subframe. Cracks initiate at the hoist mounting and propagate along the rail. They are hidden under the body and are the highest-consequence failure on the truck.
Rear hinge pin elongation and bracket wear
The rear hinges carry the entire body mass at maximum leverage every dump cycle. Pins wear oval, brackets elongate, and the body starts sitting crooked, which then loads the tailgate and the latch geometry unevenly.
Tailgate latch and seal failure
Worn pins and bent latch hardware mean the gate no longer seals at the bottom. Material trails on the road, which is a citation risk and a customer complaint, and the gate begins hammering itself on every road cycle.
Sidewall bulging from load pressure
Wet or heavy material puts outward pressure on the sidewalls, especially when a body is loaded past its intended profile. The wall bulges between the vertical stiffeners, and once bulged it no longer sheds material cleanly during dumping.
Cab shield rock strike damage
The shield exists to take strikes during loading and it does. It dents, cracks at its mounting, and eventually the mount tears at the body wall. A loose cab shield is a hazard to the cab it was installed to protect.
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Services we perform on dump trucks
Service
Structural Welding and Fabrication
Certified in-shop welding and fabrication on steel and aluminum structure. Covers frame repair, custom bumpers and racks, reinforc
Service
Frame and Structural Repair
Frame and structural repair corrects bent rails, cracked welds, failed outriggers, and out-of-square cage on RVs, trailers, and co
Service
Bedliner and Box Liner Spray-In
Spray-in bedliner chemically bonds a polyurea or polyurethane protective coating to truck beds, toy hauler garage floors, trailer
Service
Headache Rack and Cab Guard Installation
Headache rack and cab guard installation protects the cab from shifting loads on flatbeds, stake beds, and pickups, including moun
Service
Rust Treatment and Anti-Corrosion Coating
Rust treatment mechanically removes active corrosion, converts or encapsulates the sound pitted metal that remains, and applies pr
Service
Cab Body Repair, Door Hood Fender and Bumper
Cab body repair addresses door, hood, fender, bumper, mirror, and step damage on a commercial cab without opening up a full collis
Service
DOT Reflective Tape and Compliance Marking
DOT conspicuity tape and compliance marking installs certified reflective sheeting and required lettering including USDOT numbers,
Service
Pre-Trip Body and Structural Inspection
A pre-trip inspection checks the items that strand people: tires and date codes, bearings, brakes, seals, slides, hitch, and frame
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Questions about dump trucks
Frequently asked questions
What does dump body repair cost?
Floor plate section replacement runs $2,000 to $8,000 depending on area and thickness. Hoist mount crack repair with reinforcement is $1,500 to $6,000. Rear hinge pin and bracket rebuild runs $1,200 to $4,500. Welding and structural labor is $210 per hour plus materials. A paid estimate is required before scheduling.
How long is the truck out of service?
Tailgate hardware and hinge work is two to four working days. Floor section replacement runs one to two weeks. Subframe crack repair with reinforcement is one to three weeks depending on access, because the body frequently has to come up and be supported to get at the mounting. We schedule after we see it.
How do I know if my subframe is cracked?
You generally do not until it is bad, because the cracks are under the body at the hoist mounting and the rear hinge brackets. Symptoms are a body that no longer sits square when lowered, a tailgate that seals unevenly, or a body that twists visibly during a raise. We clean those areas to bare and inspect them on every dump truck that comes through.
Can a spray-in liner extend floor life?
It helps against corrosion and moderate abrasion and it improves material release, which reduces the drag wear at the rear. It will not stop impact damage from broken concrete or rock dropped from height. If you are hauling aggregate, the honest answer is that liner plus a thicker floor plate is the durable combination, and we price both.
Do you work on the hoist hydraulics or do DOT inspections?
No. We do not perform hydraulic system service, engine, or drivetrain work, and we do not do DOT inspections. We repair the body, floor, sidewalls, tailgate, hinges, subframe, hoist mounting structure, and cab shield, and we apply DOT reflective tape and compliance marking. All work is in-shop at Yorba Linda.
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Bring your dump trucks to the shop in Yorba Linda.