Howard 350 cone clutch brake0001.pdf
I did hope that a Howard expert would come to your rescue. I’ve never owned a 300/350 but have worked on a few. A while back there was a clutch thread on another forum
https://www.vhgmc.co.uk/forums/topic/howard-300-rotovator/
But I’m not sure that there is anything useful there for you.
I will scan and post an image of the cone clutch set up with a brake. Having worked on a few over the years and being kind I would call the brake a bit of a lash up . Unless someone tells me that I’ve been doing it all incorrectly it seems a very fine line between disengaging the clutch and the application of the brake on the driven ( female) cone - needing frequent adjustment. It is also important that the thrust bearing is in good condition and not partially seized.
Image to follow.
https://myoldmachine.com/applications/core/interface/file/attachment.php?id=40650
S1g is the man for Howards. Refurbished a few. Not on here much lately due to ill health, but send him a PM. Also look up his rebuild threads. May be something in those that can help you.
Veg Grower reacted to Wristpin in Advice required for Howard 300 clutch Brake