DannyD
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Posts posted by DannyD
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1 hour ago, frangar said:
Id also crack the two large bolts on the top of the injector pump just next to where the high pressure lines come out to see if fuel flows freely from them...you might need to turn the engine over if by chance one of the delivery valves is in the closed position.
My old day tank had a cylindrical bronze hydraulic filter on the exit pipe inside the tank...because the original owner was a hydraulic fitter....it blocked and caused all sorts of issues so a check there isn't anything fitted inside the tank is a good idea if you aren't getting much fuel flow.
I did that today and the fuel ran freely out of the opened screws.
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I'll check the day tank again and try to make a video next time we test it. Thanks for the help.
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There is a new fuel filter installed and indeed a daytank. Before all the work on the engine this problem didn’t exist.
Could this problem also be a valve adjustment problem? Or is fuel starvation the only option? -
No noise it just comes to a slow stop. I can turn it over right away.
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Hoi there,
i've overhauled the engine last winter, new pistons, piston rings, one big end bearing and so on. Since then the motor starts perfect, runs perfect until half speed or so, but when running it just a little faster the engine comes to a stop after 5 to 6 minutes. First time I was afraid one of the pistons was stuck, but the engine starts just fine again after just a minute or so.
Anyone any ideas what the problem might be and how to solve it?
Thx in advance, Danny
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Just now, Tracy D'arth said:
I can't see what difference using another oil will make to oil fuming. Its not the oil that causes fumes.
Just let me dream of an easy solution;-)
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No not yet, I'm currently blaming the oil I used, normally I have the Golden Film Classic SAE30 but it was a bit hard to order this time so I used Castrol classic XL SAE 30.
Before I pull the engine apart for the thirty time I wanna change the oil first to the Golden Film. I could order it now but it will take till the first week of december to get here.
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11 minutes ago, frangar said:
It’s really not a hard job though to grease the rocker shaft & top the oil up…for me it’s part of the joy of owning a vintage engine rather than a digger power plant
Yes that's a good point! 😉
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Do you have a picture of the conversion?
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On 18/11/2021 at 18:03, steamraiser2 said:
You have a JP3 which should have grease lubrication to the rocker shafts. You don't and need to fit greasers before you damage the shaft. From the video I would suggest that you check that the changeover valves are not venting through the hole in the valve body which is a sign of the valve not seating properly. Also look to see if there is any bubbling between the head, gasket and block. JPs are a little prone to weeping which is sometimes due to the head not being tightened properly or,if you are unlucky, warped heads or block face. Try pulling the head down first. They are pretty robust engines but the heads can be problematic at times
This engine has been running without greasers for over 10 years, there seams to be no wear and tear on the rocker shafts. Are you sure this is necessary?
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47 minutes ago, Tracy D'arth said:
There is no oil pump I believe so the rockers depend on oil mist to lubricate them. So its maybe oil mist you are seeing and you need the rocker covers on to ensure lubrication?
I know a friend with a JP3, I'll ask him tomorrow.
Ok thx I hope he has an answer.
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I've made a little film today, so you can see the problem. There is not much smoke coming from the exhaust.
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I think the smoke is coming from the top of the cylinder heads. I'll try and make a picture or film it, this week.
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The valves have been taken out and polished and should be ok. But it makes sense what you are saying.
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Hi guys, I have replaced the 3 pistons with new ones with pre-installed piston rings. Further more I had to replace one liner.
The first time the engine started quick and sounded good, but after some time running it started to give light coloured smoke form the cylinders heads.
When switching it off and starting it a couple of times, it starts much worse every time.
It looks like there might be to much compression or something.
Has anyone got a clue?
regards Danny
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Well I've got it out. Wood wasn't working so I had two metal plates made.
Underneath the top of the liner there is a small, thin ring, I guess that's there to adjust the height of the liner?
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Thx for the info I'm gonna try it next week with two 20 mm threaded bars and wood. The motor has been overhauled before and I'm hoping this liner hasn't been in the motor all of it's life. If that doesn't work I'll go ahead and make some steel plates. Or perhaps I can borrow yours if you still have it. I'll pay all the costs for sending it over.
Regards Danny
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2 hours ago, NB Esk said:
A further possibility to the above, make sure your injectors are in good condition, I’ve known Diesel engines to pick up as described, due to injectors over fuelling and washing the bores of their oil coating.
The injectors are new but thanks for the heads up.
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Thx for the advice all. In the first cilinder I placed the same new piston rings and in the third, a new pistons with rings. Both seem fine. just to be sure I want to put in new pistons with rings in nr 1 and nr 2 so all are the same. But first I've to get the liner out. I saw the drawings of pullers here on the site. First I wanna try it just with some pieces of wood, maybe it isn't that stuck.
Btw the rings weren't broken but just scraped the liner. Especially the top one has a lot of scratches on it. I'll make a picture of it today to post later.
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Hi there, I recently had to replace a big end bearing shell, one piston and all the piston rings on my JP3 Blackstone. Unfortunately something went wrong after just 2 hours of running. The pistin rings in cilinder nr 2 have made big scratches in the cilinder lining and has to be replaced. Not sure what went wrong tho.
I do have a spare liner available but now I need to pull the old one. Is there anyone here who can lent or sell me a puller of some sort?
My location is in the Netherlands and I'm happy to pay the shipping costs.
With regards Danny
Lister JP 3 stops when running faster
in Lister
Posted
Thx I’ll try that.