jwilkes

I have had problems last year with worn dogs on a T1200. The pto pulley just lifts off`, bit of a fiddle to get out to repair afterwards. If the plate is free then gentle easing with heavy bars and hammer

Jeremy

I think Alan has a good point. I like to review updates occasionally and share some information when I have data that I could not find on an internet search. Perhaps at some time in the future all of the questions will have already been asked. The forum data as an online archive is valuable in itself.

Supplementary pictures

Sorry for the delay rain stopped so have been preparing the veg plot for the spring planting I have had a problem with the clutch nut slipping after stripping the engine off so I could paint the new Engine mounting plate, probably a mistake with hindsight but we all make those. The rotabox is partially reassembled but an on-gong project as I…[Read more]

Thought an update would be useful to record

Clutch nut is 9/16 BSF thread having damaged the threads I am in process of repairing with Helicoils.

I found that with the dog clutch removed a 17mm rounded but socket can be used to lock the PTO shaft.

As promised a drawing of part 16135 – Friction disc uploaded in case this might be useful to others at a future time.

The Dog clutch I snow being repaired by brazing a new layer of material onto the sealing surface ready for turning. I left to cool yesterday rather than re-hardening so will heat and quench in oil later in the week, a good…[Read more]

Managed to strip out the rotor of my Gem to compare with the Yeoman rotor.

The gearchain cover gasket is different so will have to cut a new one from cork which luckily I have some cork available

The tines are the same the Gem so new ones can bought (the old ones were very worn)

The rotor friction plates are of a different to the Gem, I will…[Read more]

I managed to get the dog off the gear with the help of the oxy acetelane torch. There is bad pitting on the dog which I will try to repair with metal filler and then turn and polish again. I was trying to avoid the heat and associated annealing but could not find any other method in the end. Apart from the pitting on the sealing surface looks in…[Read more]

Alan

Thank you for the encouragement. I will probably wait until the sun shines for photos.

Got the new seals and bearings. just need to find a safe method of unscrewing the dog so I can change the oil seal then the basic mechanism can go back together after paint. The rotor box has had a very hard life looking at the tines and the bearings…[Read more]

Bit more progress

The gearbox and engine are working well with the riding seat as a towing unit at the moment. The wheels off the Howard 400 fit well. I am looking for wheel weights as traction I snot a good as it should be. Does anyone know if Howard supplied wheel weights for the Howard 400?

On a different note I woke this morning to snow…[Read more]

With all the rain I am having some problems with traction, I have fitted Knobly tyres 12-3.00 as I could not find chevron tyres, Looking through the workshop found a pair of rims of what I suspect is a Howard 400. Also have a JAP engine and fuel tank. I already noticed that the engine mount to gearbox is the same as on the Yeoman rims seem to…[Read more]

Progress update.
I have the engine connected and running. New adaptor plate is in place to connect the riding seat and plough. Minor adjustments to the clutch and gear selectors now needed. The unit is useable at last, next job will be a nut and bolt strip and rebuild of the rotobox which is rather tight. new bearings and oil seals is my hope…[Read more]

Progress update

The gearbox and ancillaries are all assembled except the clamp and gear level / cables as the new units arrived yesterday. About 1/2 way through machining a new engine mounting plate adaptor. Hope to have this as a running unit before new year now. Can look at the rotor box afterwards

Edward, Sent you an email direct

Edward
Good to hear from you

Not sure about the other members of the club, it is honourable to keep original, but like you I need my machines to work. The ones I have recovered largely have engines beyond economic repair as either rusted up, seized or completely missing. I agree with modify but with the option to reverse the modification…[Read more]

Thought I should add an update. The gearbox is together now and all the remaining parts are stripped and in paint. After careful study I can see that the Reverse gear interlock mechanism is completely missing , I suspect that it was removed at some point in the past and lost.

Does anyone have a picture if how it should assemble? Approximate…[Read more]

Not sure what I think. My Gem has the Kholer Kt17 twin with the luxury of electric start, by coincidence I also have a Clifford mk1 setup with finger mower and largely original. Last time I used as a rotavator hit a stone and the flywheel span so needed retiming, keep it as a finger mower.

When I looked at the Gem I was more concerned about the…[Read more]

Edward

I have a Gem and like you was looking at the idea of using it a two wheeled tractor. The problem is that you have to take a lot of the rotor box off to get a usable tractor unit and then start welding to get a mounting point for implements. I have chosen to go the Yeooman / 70 route where the rotor box drops off easily and new implements…[Read more]