VAV Controller Gear Failures

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Has anyone had issues with gears in VAV controllers (\2866, I2865) teeth breaking off causing the damper to fail in place and if so was any attempt made to replace the gear?

We have replaced several gears to get the VAV controllers back in service and are looking to see about getting replacement gears outside of scavenging them from controllers that have failed for other reasons as the gear failures outnumber the other causes of controller failure.

The specific gear that is failing is stamped DCQC-131 part number.

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VAV Controller Gear Failures

VAV Controller Gear Failures

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