Yellow Jacket 93047 Ritchie Pump Drive Coupling

Good

Much improved over original coupling. Easy to install.

Fit perfect

Amazing

Better than original.

My vacuum pump original coupling finally let go. This was a nice quality and quick to install replacement and took about 20 minutes to change! Now its back in action.

Fit my older pump like a charm. Easy install. Much improved design over the plastic piece that was on it.

My older Yellow Jacket vacuum pump stripped out the existing drive coupling. The original design was fairly poor. A plastic (or similar material) bushing connected the motor drive to the pump drive via small ridges on the inside of the bushing which lined up with ridges on the drives. Excessive heat, age or both caused the plastic to warp and crack which resulted in no more vacuum pump. I was very happy to see this kit. It replaces both the drive connections and replaces the cheesy plastic bushing with a much more positive and robust connection/locking system. Hard to describe unless you see it, but reminds me of Tetris :)