Roura’s self-dumping hoppers are sturdy and reliable because we use heavy-gauge, high-quality steel and precision components and ensure the integrity of every weld.
However, like all industrial equipment, self-dumping hoppers need occasional inspection and maintenance. Moving parts wear, dirt and grime accumulate, and high or uneven loads can accelerate deterioration. Additionally, we know that hoppers will occasionally get knocked, banged, and damaged during use,
If a hopper isn’t maintained as needed, issues can develop that affect how the hopper functions, increasing the risk of hazardous situations, such as unexpected dumping. To avoid these issues, address any issues with your hopper sooner rather than later.
This article highlights how to troubleshoot the most common issues with a self-dumping hopper, including:
Hopper Won’t Dump
Most self-dumping hopper models are designed to tip forward and empty when the latch is released. If this doesn’t happen, it’s likely due to:
- The load is at the back of the hopper, away from the emptying end, so that the hopper won’t tip forward. Lower the hopper and ensure the load is distributed evenly.
- The forklift and hopper are on an incline and facing up the slope. Always empty while on level ground.
- The latch won’t release. This could be because the hopper load is too high or because the latch mechanism is seizing due to dirt buildup.
- An object, such as debris, is blocking the tipping action, or the hopper has become misaligned.
Hopper Won’t Latch
Once a load is dumped, the hopper should roll back into position and latch automatically. An unlatched hopper is a serious safety hazard as it could move unexpectedly. If the hopper doesn’t latch, check the following:
- Are parts of the latch mechanism worn? A rounded hook or latch plate could cause the hopper to appear latched but not be held securely.
- Is the latch mechanism moving correctly? Is it corroded and seized? Is the spring broken?
- Is the hopper aligned with the latch? The pivot pin could be worn, or the frame could be damaged, resulting in the hopper not rolling correctly on its tracks.
Given the potential seriousness of latching problems, latch operation should be checked periodically.
Forks Aren’t Fitting Smoothly
A forklift must fit securely within the fork pockets for safe hopper lifting and operation. If they appear to bind on the way in, possible causes are:
- Incorrect fork spacing, which can happen when fork positions need adjusting for different tasks and the operator rushes to reposition them, or forgets entirely.
- A twisted hopper frame, which can result from uneven loading and a lack of attention during emptying and positioning.
- Bent fork pockets or damage around the entry, resulting from inattention during use or a lack of care in forklift operation.
- Debris within the pockets.
Fork pockets should be inspected periodically; simply shining a light through each pocket is sufficient.
Hearing Loud, Unusual Noises
Any creaking, groaning, or grinding noises during emptying suggest parts are rubbing together. This can happen through wear or corrosion, especially with pivot pins. Lower the hopper, lubricate moving components, and see if the problem goes away.
Another possible reason for the noises is a buildup of debris on the tracks the hopper uses to tip. These tracks should be kept clean at all times.
Less likely, cracking or banging noises could indicate panel deformation or weld failures. If you hear cracking or banging noises, quickly bring the hopper to the ground and investigate further. Do not use the hopper again until the source is identified and its impact assessed.
Caster Wheels Are Wobbling or Seizing
Caster faults can cause the hopper to track unevenly as it is pushed through the plant.
A caster that wobbles is usually suffering from wear in the bearing or a deformed mechanism. The best solution is to replace it.
A caster can also seize when the bearing locks up or when debris wraps around the wheel. Less often, if a wheel develops a flat spot through overloading, it will also act like a seized caster.
Hopper Body Doesn’t Rock Back
Self-dumping hoppers are designed to roll back into position once empty. If this doesn’t happen, possible causes are:
- Material is hung up inside the hopper, keeping the center of gravity forward.
- Debris in the pivot or frame is stopping it from rocking back.
- The pivot shaft is corroded or seized.
- Faults with the trip lever handle that prevent the hopper from returning.
Find More Resources
Roura Material Handling is a leading manufacturer of material handling equipment and the original inventor of the self-dumping hopper. Founded in 1921, we offer more than 60 standard models and sizes of self-dumping hoppers, along with rotator boxes, bottom drop boxes, and specialty hopper designs, including Skeleton and Dewatering.
Visit our website to learn more about our products, training materials, and additional troubleshooting support. If you need replacement components for your hopper or want to speak with one of our experts, please contact us online, and a representative will be in touch within 24 hours.