[vhgmcbuddy]

if you are in kent i could

[vhgmcbuddy]

Not sure whether these parts illustrations are what you already have but they may be of use to you or others.

https://www.dropbox.com/s/0jbgz39rknbrb90/HOWARD%20300%203500001.pdf

[vhgmcbuddy]

As I said, it was a while ago ! Anyway I’ve had a look at a parts list and you are correct, no face dogs but a sliding gear. Similar situation applies. If, over time, operators have been a bit impatient and attempted to engage the rotors before the drive train was stationary the mating surfaces of the gears will become worn and will tend to be forced apart under load.
I will scan the relevant pages of the manual and post them later – they may be of assistance.

[vhgmcbuddy]

Thanks Angus, As far as I can see from the parts diagram and by peering in through the selector opening there are no ‘dogs’ or other mechanical locking device to hold the rotor selector drive gear in position once it is engaged. The rotor selector drive gear and the idler are straight cut and the rotor selector drive gear slides on the shaft to mesh with the idler.

I would have expected to find some form of mechanical locking but I just cannot figure it out. Any information would be greatly appreciated.

[vhgmcbuddy]

Sorry i cant make it its a very good day i recomend it to anyone interested in our hobby, well worth a visit, lets hope the weather keeps fine.

[vhgmcbuddy]

Thanks for that. I take it by Coil pick-up you mean the LT lead from the points.

[vhgmcbuddy]

Yes a multimeter can test one. Set the resistance in ohms to 10,000 and then put one lead on agood clean earth on the coil. Put the other lead on coil pick up and the reading if okay should be between 5,000 or more.

[vhgmcbuddy]

Hi Charlie
No plate on this one anyway.

[vhgmcbuddy]

Dealt with a few years ago and from what I can remember the problem was caused by wear on the dogs causing them to ” cam out” under load and the only answer is new components. What I also remember is that when offering the gearbox back onto the chain case there’s a little shim/thrust washer on one of the shafts that needs to be firmly stuck on the shaft with heavy grease to ensure that it stays in place. Once the gearbox is back on there is no way of checking !

[vhgmcbuddy]

many thanks Philip. my next job which envolves this project is mount it all on a trailer ,which I would like to start this weekend coming. my first show is on easter sunday so I had better get cracking. once its done I will get someone to video it with myself demonstrating what its duty in life was.

[vhgmcbuddy]

Looking at the picture of brians it doesn’t look particularly big or very heavy,I have a couple of landmaster rotary hoes that are big and very heavy but are not 150’s,maybe a picture or two would help with identification.

[vhgmcbuddy]

Well done. Great find !

[vhgmcbuddy]

John, Congratulations on the Lister restoration, as good as all your other work, Stunning stuff.

[vhgmcbuddy]

trying this

[vhgmcbuddy]

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