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Liftgates may not be the flashiest part of a heavy-duty truck, but when they fail, you know about it. These hydraulic or electric platforms are crucial for safe and efficient loading and unloading, especially in fleet operations. If your liftgate quits during a job, not only are you stuck with idle time, but you might also be dealing with cargo damage, lost revenue, and safety risks.
Knowing the common signs of liftgate failure can help you stay ahead of the curve and out of trouble. That’s why we asked our hydraulic repair team to share their red flags that indicate it’s time to give your liftgate some serious attention.
Slow or Jerky Movement
One of the first and most obvious signs your liftgate is on the fritz is inconsistent operation. A properly functioning liftgate should move smoothly up and down. If it lurches, hesitates, or groans its way through the motion, something’s off.
This could be due to:
- Low hydraulic fluid levels
- A failing hydraulic pump
- Worn-out or damaged cylinders
- Corroded electrical connections
Don't ignore this symptom! It’s usually the first warning sign, and addressing it early on is the best way to save you headaches and money in the long run.
Failure to Lift or Lower Completely
Let’s say your liftgate won’t fully extend or retract. Yes, it’s annoying, but worse, it’s a productivity killer. Most often, this issue points to a hydraulic leak, damaged lift arms, or a malfunctioning solenoid.
If left unchecked, that half-working gate could fail altogether, potentially causing injury or damaging freight.
Hydraulic Fluid Leaks
This is a big one.
Leaking hydraulic fluid is one of the most serious signs of liftgate failure. Not only does it hamper performance, but it also creates a slip hazard and can indicate failing seals, cracked hoses, or compromised cylinders.
If you're constantly topping off fluid, you're not solving the problem; you’re only treating the symptom. A professional liftgate inspection is critical here, as leaking hydraulics can lead to total liftgate failure mid-operation.
Abnormal Noises
Clunks, bangs, or high-pitched whining sounds are the kind of music no operator wants to hear. Unusual noises usually mean:
- Worn or misaligned pivot points
- Failing motor components
- Debris caught in the lift mechanism
If your liftgate sounds more like a haunted house than a precision machine, it’s time to schedule a service.
Electrical Failures or Unresponsive Controls
If your controls are dead or only work intermittently, the issue could be:
- Corroded electrical connectors
- Damaged wiring
- A faulty control switch
- A blown fuse or bad relay
Moisture intrusion is especially common in the Midwest, where rain, snow, and road salt take a toll on exposed electrical components. Make it a habit to visually inspect and clean your liftgate’s wiring and terminals during routine maintenance.
Uneven Platform Operation
If one side of the liftgate raises or lowers faster than the other, you're dealing with a load balance or mechanical integrity issue. This can lead to twisting or buckling of the platform over time, which is especially dangerous when lifting heavy loads.
It may also be a sign that your linkage arms or lift chains are worn out or that hydraulic cylinders are no longer evenly pressurized.
Inconsistent Performance in Cold Weather
Temperature extremes wreak havoc on hydraulic systems, especially in older liftgates. In colder climates like Indiana, hydraulic fluid thickens and metal components contract, causing the system to slow down or bind altogether.
If performance consistently dips during cold mornings, consider switching to a cold-weather hydraulic fluid and insulating vulnerable lines and components.
Excessive Rust or Corrosion
Corroded platforms, hinges, and mounting points weaken structural integrity and can lead to catastrophic failure if not addressed. Snow, ice, and salted winter roads accelerate corrosion throughout the Midwest.
Pay close attention to:
- Mounting brackets
- Welds and joints
- Pins and bushings
- Underside of the platform
Regular cleaning and anti-rust treatments can extend the life of your liftgate significantly.
The Liftgate Won’t Stay in Position
If the gate drifts down while holding a load or won’t stay locked in the upright position, is a safety hazard. This typically indicates valve leakage, faulty cylinders, or worn locking mechanisms.
Letting this slide could lead to a gate crashing down on your crew or your cargo.
Frequent Circuit Breaker Trips or Blown Fuses
Electrical overloads often show up as repeated blown fuses or tripped breakers. This is a clear signal that your system is drawing too much current, likely from:
- A bad ground
- Shorted wiring
- A worn-out motor
Continuously replacing fuses is like putting duct tape on a cracked windshield. It’s a temporary fix, not a solution.
What To Do If You Spot These Signs
If you’ve noticed any of the above symptoms, don’t wait for a full breakdown. Schedule a thorough inspection. Preventive maintenance is your best defense against downtime and costly repairs. Liftgates work just as hard as your transmission, air brakes, or cooling system, and they require the same attention.
Whether you're managing a single delivery truck or an entire fleet, catching these signs early can save you time, money, and a whole lot of frustration.
Final Thoughts
Your liftgate might be at the tail end of your truck, but it’s at the front line of your operation. From hydraulic leaks to electrical gremlins, these signs of liftgate failure are your early warning system. Don’t ignore them.
By staying alert and acting quickly, you can keep your heavy-duty truck safe, efficient, and ready for work.
Noticed strange noises or sluggish movement from your liftgate? Don’t wait until it’s stuck halfway up during a delivery. Reach out to our team at ProFleet Diesel Services and keep your operation moving strong mile after mile!