Crocodile Garage Doors Problems

Crocodile garage doors are popular choices for many homeowners, offering durability and a streamlined look. However, like all mechanical devices, they can experience issues. Based on the experiences of several users, here’s a detailed breakdown of a particular problem faced with these garage doors and the potential solutions.

The Problem: A user reported a problem with their garage door unit, which appeared identical to the popular Crocodile-supplied units often advertised on TV. The door malfunctioned by opening further than intended, jamming on the roll. As a result, the motor continued to run and may have suffered internal damage. On trying to release it, the door rapidly closed, and the motor made a noise but hardly moved the door. The problem seemed to lie with the internal drive system.

Additionally, the manual open/close crank did not provide any resistance, suggesting another potential issue with the internal mechanisms.

Potential Causes and Solutions:

  1. Sheer Pin Issue:
    • Cause: It’s believed that there’s a sheer pin in the shaft designed to protect the motor and gearbox. A sheer pin, similar to a roll pin, is meant to snap when subjected to excessive torque. If the pin breaks, it can prevent the door from functioning properly.
    • Solution: Check the sheer pin for damage. If broken, it will need to be replaced.
  2. Motor Issues:
    • Cause: Examination of the door’s motor indicated that it was of a low voltage variety. Although the motor seemed to be running, its exact state remained uncertain.
    • Solution: Disassemble and inspect the motor for any signs of wear, breakage, or internal damage. If found to be faulty, replacing the entire motor might be the best solution.
  3. Drive Shaft Problem:
    • Cause: Further inspection revealed that the drive shaft, about 3/8″ in diameter, appeared to have snapped. This shaft is critical for the operation of the door.
    • Solution: A replacement unit can be procured for around £60. Alternatively, there’s the option of repairing the current unit and keeping it as a spare.
  4. Safety Concerns:
    • Cause: One alarming discovery was that if the sheer pin fails, there’s nothing to stop the door from rapidly descending, potentially causing injury or damage.
    • Solution: It’s crucial to frequently inspect the sheer pin and other internal mechanisms for signs of wear. If there’s a noticeable reduction in the sheer pin’s diameter, it should be replaced as a precaution.
  5. Alternative Repair Suggestions:
    • For the snapped shaft: One can cut a slot into the end of each shaft and join them with thin steel. This would involve drilling through the steel to fit a couple of small split pins. Another method involves using a tight-fitting tube, pinned to each shaft section.

In conclusion, while Crocodile garage doors are a popular and durable choice, it’s essential to be aware of potential issues and their solutions. Regular inspections and maintenance can go a long way in ensuring the longevity and safe operation of these doors. If you’re not confident in handling these issues on your own, it’s always a good idea to consult with a professional or the manufacturer directly.

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