When a dump bed will not lift, will not hold, or comes up slow, the truck cannot do its job — and that is lost loads and lost money. Dump truck hydraulic and hoist repair is everyday work at Ames Hydraulics, from the hoist cylinder to the pump to the valve that controls it.
When the Bed Won’t Lift
A dump bed that will not raise, raises slow, or will not hold up under a load almost always comes back to the hydraulics — the hoist cylinder, the pump, the PTO, or the control valve. We diagnose the dump truck hydraulic system as a whole instead of throwing parts at it, find what actually failed, and fix it so the bed lifts strong and holds.
Hoist Cylinders
The hoist cylinder is what does the heavy lifting, and when it blows a seal or scores a rod it leaks down and the bed drifts. We rebuild hoist cylinders — including the big telescopic ones — resealing, repairing the rod, and pressure testing them so they hold a loaded bed in the air the way they should. See our hydraulic cylinder repair page for how we rebuild and test them.
Pumps, PTOs, and Valves
Behind the cylinder is the rest of the dump truck hydraulic system — the PTO that drives the pump, the pump that moves the oil, and the valve that controls the lift. A slow bed is often a tired pump or a PTO problem, and a bed that drops on its own is usually the valve. We repair all of it so the whole system works together.
Dump Trailers Too
It is not just trucks — dump trailers, end dumps, and side dumps run the same kind of hydraulics, and we fix those hoists and cylinders the same way. Whatever raises a loaded bed, we can repair the system that powers it.
Won’t Hold or Drifts Down
A bed that slowly settles after you raise it is more than annoying — it is dangerous when someone is working under it. That drift is almost always a cylinder bypassing internally or a valve leaking down, and we find which one and fix it so the bed stays where you put it.
Dump Trucks We Service
Single-axle to tandem and tri-axle, gravel trains, grain and silage trucks, and the construction dumps working metro and rural sites — we handle the dump truck hydraulic systems on all of them. Different trucks use different hoists and pumps, but the failures rhyme, and we know where to look.
Telescopic and Scissor Hoists
Whether your truck runs a telescopic (front-mount) hoist or an under-body scissor hoist, the dump truck hydraulic repair comes down to the cylinder, the pump, and the valve. We rebuild both styles of hoist, including the big multi-stage telescopic cylinders, and get the geometry and the hydraulics working together so the bed lifts smooth and straight.
Slow Hoist? Here Is Usually Why
A hoist that has gotten slow is most often a pump that has worn and is no longer moving the volume it used to, a PTO not turning the pump at the right speed, or oil that is low or too hot. We test the system to find which it is, because replacing a cylinder when the pump is the problem just wastes your money.
A Bed That Drops Is a Safety Issue
The most important dump truck hydraulic repair we do is on beds that will not hold. A raised bed that settles on its own can kill someone working underneath it. That drift is a cylinder bypassing or a valve leaking down, and we fix it so the bed stays up when it is supposed to — this is not a repair to put off.
Pressure Tested and Back to Work
Every cylinder we rebuild is pressure tested to working pressure before it goes back on the truck, so the dump truck hydraulic repair holds up to real loads instead of failing again the next week. We stock chrome rod, so a rebuild does not wait weeks on parts.
We Stock Chrome Rod for Fast Hoist Rebuilds
A scored or bent hoist cylinder rod does not have to mean a long wait. We stock chrome rod, so we can turn a replacement rod and rebuild your hoist cylinder while other shops are still waiting on a part to show up. For a dump truck hydraulic repair in the middle of a busy season, that turnaround is the whole ballgame.
Dump Truck and Trailer Hydraulics in One Shop
The cylinder, the pump, the PTO, the valve, and the plumbing all get handled here, so your dump truck hydraulic repair does not get split between a body shop and a hydraulic shop. One place diagnoses the whole system, fixes it, and tests it — which means fewer trips and a bed that actually works when you get it back.
Send Us a Photo or a Video
Not sure what is wrong? Take a video of the bed trying to lift, or a photo of the leak, and send it over. A lot of the time we can tell you what the dump truck hydraulic problem is and what the fix takes before the truck ever comes in, so there are no surprises.
Free Pickup Within 60 Miles
A dump truck that will not dump is hard to move, so within 60 miles of Ames we will come get it, repair it, and bring it back. For the whole hydraulic system, see our hydraulic repair services. Bed down? Call or text Ames Hydraulics at 515-292-2599.
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