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Old 02-05-18, 02:34 PM   #21
Dan_pt
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Nick, that looks identical to mine.
I need the plunger and bush assembly..... fat lot of chance of finding one I reckon!

Dan.
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Old 02-05-18, 03:25 PM   #22
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There's a couple of decent pictures of the Injector pump if You follow the links from earlier in the thread. Also if You PM'd "motorenbau" He may be able to help. He last visited here in February this year, so is still around!
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Old 02-05-18, 03:44 PM   #23
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Quote:
Originally Posted by pulsechoes View Post
There's a couple of decent pictures of the Injector pump if You follow the links from earlier in the thread. Also if You PM'd "motorenbau" He may be able to help. He last visited here in February this year, so is still around!
Thanks for that. That is identical to mine. There didn't seem to be any wear visible in my pump so I am a little disappointed that it doesn't work under pressure.

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Old 02-05-18, 07:52 PM   #24
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This evening I had another look at the pump. The cross sectional drawing actually showed me that it wasn't the plunger to guide seal that was faulty as the fuel would have been leaking out further back where the main spring is.
The cause of pressure loss was a small amount of corrosion between the inner flange of the guide and the pump body, this is a metal to metal joint with no gasket or washers so has to be absolutely spotless. I cleaned the sealing faces up very carefully and reassembled and bled it for a bench test... suffice to say that I can no longer hold back the pressure, even by holding a ball bearing in the fuel outlet, it actually squirted diesel across the room. It also pumps with the slightest of nudges of the plunger.
That said, I am not going to count my chickens just yet, I will only be happy when I hear a nice squeak from an injector.

Dan.
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Old 02-05-18, 08:43 PM   #25
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Sounds promising though

Neil.
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Old 03-05-18, 05:48 PM   #26
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I got the pump refitted today and the difference in performance was immediate, the starting injector was soon squeaking like mad, I am not convinced that the main injector is working properly but it is definitely doing something! I did attempt to start it but as I suspected its compression is low and although it did run for a few seconds it was far from happy.... Looks like I will be pulling the piston out next.

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Old 04-05-18, 10:22 PM   #27
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As

Here are some pictures of my latest project.





I have swapped the drive flange out for the starting shaft on the front of the engine as it was originally configured for Left hand cranking from the opposite side to the controls.



The rust speckled crankcase shows that it hasn't run for years.



Here is the fuel pump..



The injector selector.




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Old 04-05-18, 10:47 PM   #28
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More pics of what I found I found inside.

The pump pressure problem was due to corrosion between the plunger guide..



And its register in the pump body.



Removing the head revealed the causes of the low compression.







Doesn't look good, does it!



Signs of water ingress....

It is shaping up to be a really good project.

Dan.
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Old 04-05-18, 10:58 PM   #29
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It'll get there Dan, and be a nicer engine than the rest of its stable mates

Neil.

PS: It's just a big Kubota anyway
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Old 04-05-18, 11:14 PM   #30
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Quote:
Originally Posted by Hornet 6 View Post
It'll get there Dan, and be a nicer engine than the rest of its stable mates

Neil.

PS: It's just a big Kubota anyway
Nope, I have a few Rustons........... and I think it predates the Kubota

Dan.
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