Box Truck Repair including roof repairs, corner repairs, floor repairs, roll up door repairs, man-door repairs, ramp repairs, lift-gate repairs and more.

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Liftgate Won’t Raise or Is Slow—Battery, Pump, or Cylinder Issue?

  “Liftgate Won’t Raise or Is Slow—Battery, Pump, or Cylinder Issue?” You hit the switch and… nothing. Or worse, the liftgate crawls up like it’s towing a house, then stalls a few inches off the ground. Now you’re wondering: “Is my battery dead? Pump shot? Cylinder leaking? What’s really wrong with this liftgate?” This longform guide breaks down how commercial liftgates work, why they go weak or dead, how to diagnose electrical vs. hydraulic vs. mechanical faults, what repairs typically cost and how long they take—and how to prevent the next downtime surprise. Quick Takeaways Electrical issues (low voltage, bad grounds, corroded connectors) are the #1 cause of slow or non‑responsive liftgates—check the battery and cables first. Hydraulic problems (low/contaminated fluid, weak pump, stuck relief valve, leaking cylinder seals) make gates slow, spongy, or unable to hold a load. Mechanical binding (bent arms, seized pins, warped platforms) can mimic hydraulic/electrical...
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How Often Should Liftgate Hydraulics Be Serviced?

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