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Engines / Re: Oil on top of me piston HA2
« on: February 25, 2023, 09:22:54 AM »
All sorted...New injector pumps
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Well done and good progress for you. I meant to say to remember to mark the gear before removal so the timing does not get upset. I had an engine where the timing marks will never align as it had the wrong model cam gear inside but same size and teeth number. Luckily I did make my own marks before stripping it down.
[/quote........oh yeh I've made that mistake before so yep the center pop was out doing its thing👍]
.....its a lister ha2.....there is two locating dowels so it's not going to screw and yeh if I tap it with the mallet it does move side to side....if I can get away with it I dont want to use heat because of the gear behind it....the 4 holes for the oil spinner bolts are unthreaded but they are the right clearance size for a 12mm tap so I can tap them and hopefully use the slide hammer......I will keep you guys posted
Yeah I agree they are one piece but I'm thinking there could be a shaft, maybe a taper one inside the extension shaft. I have one on an engine like that and come to think of it, it's a screw fitting. You turn the extension shaft opposite rotation and it unscrews. There is a thin threaded section that locks them together on the taper. When the engine is running it's always tightening them although with a good couple of wacks on the pulley that sits on the extension, it breaks free and comes apart quite easily. The thread is only about 10mm. Not a lot but it has no trouble holding 12 Hp. Taper is the key i'd say.
I have no idea what this engine is like but mine has a stubby taper shaft for a gen head. The extension takes it back to a standard 3/4" in this case.
Might be worth a try unscrewing this extension? If it won't pull, that could be why?
Give the thing a few belts in the holes with some wood and a hammer or a soft drift opposite to engine rotation and see how you go.
Hi Ube......so its steady away with the slide hammer......gently does it......not like a NCB fitter😉
Yes, you are missing that cast iron is fragile. That extension shaft has the notch and pin, and it must come off straight.
Cheers
VP