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    Re: Could anybody help with a Haybob please ?

    Not sure about a disc mower. I bought a new 4 drum PZ Cyclomower mower in about 1969, the only other "circular" type of hay mowers at that time as far as I'm aware were the 4 drum Bamford Wizzler...
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    Re: Could anybody help with a Haybob please ?

    I agree and I was thinking yesterday as I was working on it that the person who thought of and designed the setup is quite ingenious. Also quite cheap, some nylon blocks & rings, roll pins and some...
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    Re: Could anybody help with a Haybob please ?

    While I would agree with the reliability comment I do think they are somewhat over-complicated engineering-wise in respect of what they do. But maybe that is why they are so reliable. I got back to...
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    Re: Could anybody help with a Haybob please ?

    Thank you Ironhead. I've had to pull all sorts of stunts to get that far. It's surprising what goes on in those rotors. I had never even given it any thought prior to this project. Always made sure...
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    Re: Could anybody help with a Haybob please ?

    Thank you John. No, the other side is perfectly O.K. Started to button it all back up together today but field work had to come first.
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    Re: Could anybody help with a Haybob please ?

    Yes, it nearly came to slitting the sleeve but I persevered and the result is below. This job didn't go well but I won in the end. There are some battle scars but none on me....
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    Re: Could anybody help with a Haybob please ?

    Thanks JV. My 135 is too old for pressure control but it's a good idea. I could still use TCU on my DBs. Thanks for info. re: stalks. I thought they bent backwards. I suppose it makes sense really.
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    Re: Could anybody help with a Haybob please ?

    When the haybob was introduced they were fitted with rubbish tyres as I found out to my cost. It's no fun rowing up fit hay and trying to keep the height right on the linkage instead of on the...
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    Re: Could anybody help with a Haybob please ?

    Yes, done all that but slide bearing off the stub shaft ?? I wish. :(
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    Re: Could anybody help with a Haybob please ?

    Well, first of all my cunning plan wasn't cunning enough. After a few days of soaking and then welding the yoke on still nothing would budge. :mad: The first image below was my crude attempt to...
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    Re: Could anybody help with a Haybob please ?

    Found these in the workshop today. Are either of them any better than WD40 for rust penetration/removal ? The Jenolite contains phosphoric acid but don't know about Auto 4 penetrating oil.
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    Re: Could anybody help with a Haybob please ?

    Yes, I had thought about something like that. But I'm getting impatient now (one of my many faults) so if I have time today I'll attach the yoke and see how it goes. No need to worry about tipples of...
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    Re: Could anybody help with a Haybob please ?

    Thanks. I'll see how I get on with the yoke first but I like the idea of allowing a slow dribble of coke to attack the rust but the stalk is cranked and I wouldn't be able to get a lemonade bottle...
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    Re: Could anybody help with a Haybob please ?

    The start of the cunning plan. :o I made a yoke that fits round the boss of the sleeve. I intend to weld it to the boss. The other end of the yoke is trapped against a crowbar that goes through the...
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    Re: Could anybody help with a Haybob please ?

    No, I actually turned that a little when I had the stilsons on the stalk. But I've been advised not to take the sleeve and the stalk out as one if it is possible to get the stalk to turn within the...
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    Re: Could anybody help with a Haybob please ?

    Just to clarify the situation. Item 17, the stalk, is seized up inside the sleeve, item 24/15 (it's got 2 numbers because they can be LH or RH thread, depending on which side of the machine they are...
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    Re: Could anybody help with a Haybob please ?

    Thanks for that but I'm not sure that a coolant like that would work in my situation. It's impossible to get at the bit that would want cooling down. And the sleevt is about 1foot(-ish) long and it...
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    Re: Could anybody help with a Haybob please ?

    I have put shafts in the freezer before now when it was possible to enable fitting of bearings.
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    Re: Could anybody help with a Haybob please ?

    Unfortunately not. And no experience of using that but it sounds interesting.
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    Re: Could anybody help with a Haybob please ?

    I'm not going to release details of my "cunning plan" unless and until it works. If it doesn't then I can deny all knowledge of it. :o I will take some piccies when I am about to commence but first...
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    Re: Could anybody help with a Haybob please ?

    Thanks John. Well, I turned it upside down after de-tining it. No two bolts the same on the tines so that was a gas axe job :) I did just put a big pair of Stilson on the stalk and a length of 2"...
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    Re: Could anybody help with a Haybob please ?

    Thank you. Yes, going to de-tine it today because most of the PZ99 & PZ100 springs are shot and then turn it upside down and then WD40 underneath for a few days.

    I have a large set of Stilsons...
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    Re: Could anybody help with a Haybob please ?

    Thanks for that. I have been advised not to allow the whole lot to drop out. That upsets the timing, backlash etc. of the crownwheel and pinion. I have ground the top of the stalk so the swollen part...
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    Could anybody help with a Haybob please ?

    I have run many Haybobs over the years but have just rescued an older one from the nettles ! I have a problem insofar as one of the depth wheel stalks is seized. I have extracted the handle at the...
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    Re: Any chance of a bit of help please ?

    I had to concede. :mad::mad: I tried the wheelbarrow tube dodge and that didn't work. So I took the tyres & rims to a well known national tyre supply and fit company.They tried to blow them on with...
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