Cub brake question

JDnTN · Jul 1, 2010

Just got the left side apart and the Woodruff key that holds the brake hub to the axel shaft is gone allowing the hub to spin on the axel. The two set screws are still in place (Allen head, one behind the other). The groove for the square end of the key across the inside of the hub beneath the bushing is only about a finger nail deep. Is that as deep as it is supposed to be and then rely on the set screw to secure it or did the years of spinning wear it away? The hub/bushing seems to fit well on the shaft. Thanks for any repair ideas. JD

Haas · Jul 1, 2010

I don't see any bushing between the brake drum and the pinion shaft in the parts info, nor to I recall there being any bushing. The brake drum fits directly on the pinion shaft with the woodruff key and the set screw to secure the drum from sliding off the shaft. The key holds the drum from turning on the shaft and the set screw is to retain the drum on the shaft, not to keep it from turning. If the keyway in the brake drum is only fingernail deep, then something is a miss. From your description, it sounds like the drum turned on the shaft and wallowed out then someone bored it out and made a bushing to make things fit up again. Sounds like you need a new brake drum. These are available after market and are not too expensive. If there has been machine work done on the pinion shaft, you may have a bigger problem though.

Cub brake question

JDnTN

Member

Haas

Well-known Member

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