Forum for air cooled diesel engines and clones

[90cummins]

Thank you but no it’s not what I’m looking for.
The manual was written by Niehoff.
I have a file on my old computer just need to find it.
Thank you for your effort
90cummins

 

[bmaverick]

Thank you but no it’s not what I’m looking for.
The manual was written by Niehoff.
I have a file on my old computer just need to find it.
Thank you for your effort
90cummins

Amazing, you started this entire thread and its well over 60 pages now. So many manuals have been posted in this thread too over the years. Truly an amazing topic here.

 

[90cummins]

Found this on google.
Not the workshop manual but it shows electrical schematics.

https://www.ceniehoff.com/Documents/Ctrl_Hyperlink/TG110_uid2520211118371.pdf

90cummins

 

[bmaverick]

Quite some time ago I believe I posted the shop manual for the Niehoff N1603 military generator.
Does anyone know where it’s posted or a copy for a fellow TBN’r.
Thanks
90cummins

Found this on google.
Not the workshop manual but it shows electrical schematics.

https://www.ceniehoff.com/Documents/Ctrl_Hyperlink/TG110_uid2520211118371.pdf

90cummins

And with my metadata script tool for the web, I found this,

https://ceniehoff.com/Documents/Ctrl_Hyperlink/TG29D_uid6920111003471.pdf

https://www.militarysystems-tech.com/sites/militarysystems/files/supplier_docs//N1606-Brochure.pdf

 

[ponytug]

Quite some time ago I believe I posted the shop manual for the Niehoff N1603 military generator.
Does anyone know where it’s posted or a copy for a fellow TBN’r.
Thanks
90cummins

I searched your posts here, and it isn't mentioned as such, nor could I find one on the web. Sorry.

I was reminded what a neat setup you have.

All the best,

Peter

 

[patdufo1]

I have 2 genuine air cooled Yanmar diesels and a Chinese quiet generator set with an L100 clone.
The Yanmar air cooled diesels are excellent engines very well designed, durable and easy to work on.
My Chinese quiet diesel generator rated at 6500 watts has however proven otherwise, this generator failed at 41 hours due to a failure of the small bearing end of the camshaft. The cam bearing surface was not hardened and wore causing the engine to shut down due to low oil pressure from metal contamination of the filter.
It has taken me 2 years to find (Chinese) replacement parts. The engine is back together and currently running fine however I have little faith in it.
Finding information or user experience on the Yanmar and Chinese clones is difficult and finding Chinese parts is worse.
I have learned quite a lot about these engines and would share it with others however there is no forum that focuses on the L series Yanmar or clones.
Would it be possible to create a forum dedicated to the air cooled Yanmar and Chinese clones??

Thanks Tim

I cant see how to make a new post?I have a enclosed generator that the fuel pump appears not to work?This one is different then my other 186f,this one has a selonoid on the pump,trying to figure out what that is for?Stops the fuel?There is a blue wire should that have constant power when running?or only enegized when shutting down?thanks

 

[thepumpguysc]

That’s hard to say.. u can check it to be sure with a test lite or multi meter..
Most of them I deal with are “ETR” energized to run solenoids.. which means 12v will be constant when running..(on)
If u like, u can send a pic to my email.. it’s my screen name at aoldotcom..

 

[patdufo1]

I have 2 genuine air cooled Yanmar diesels and a Chinese quiet generator set with an L100 clone.
The Yanmar air cooled diesels are excellent engines very well designed, durable and easy to work on.
My Chinese quiet diesel generator rated at 6500 watts has however proven otherwise, this generator failed at 41 hours due to a failure of the small bearing end of the camshaft. The cam bearing surface was not hardened and wore causing the engine to shut down due to low oil pressure from metal contamination of the filter.
It has taken me 2 years to find (Chinese) replacement parts. The engine is back together and currently running fine however I have little faith in it.
Finding information or user experience on the Yanmar and Chinese clones is difficult and finding Chinese parts is worse.
I have learned quite a lot about these engines and would share it with others however there is no forum that focuses on the L series Yanmar or clones.
Would it be possible to create a forum dedicated to the air cooled Yanmar and Chinese clones??

Thanks Tim

I have an enclosed gen might quip 7000(need manual?)that has a selonoid on the fuel pump?does this stop the fuel?has a blue wire to it?If so does it have power constant while running?or only powers on to stop it?Cant seem to find a way to post on this thread?thanks(my other ones have no selonoid on the fuel pump)

 

[ponytug]

I have an enclosed gen might quip 7000(need manual?)that has a selonoid on the fuel pump?does this stop the fuel?has a blue wire to it?If so does it have power constant while running?or only powers on to stop it?Cant seem to find a way to post on this thread?thanks(my other ones have no selonoid on the fuel pump)

Welcome to TBN!

I have a similar setup, and yes the solenoid controls the fuel, but not the way you wrote. 12V opens the solenoid, and allows the pump to pump diesel. In my limited experience, the solenoid internal coils go bad with some frequency, but I would rule out other potential plugs, like the filter first. The wire can vibrate and break, so it is worth checking that the solenoid has and keeps power while running.

All the best,

Peter

 

[shanana]

Hi,

i have a Generator with ah 186f Yanmar Diesel Clone with 9 workinghours.
After two hours it stopped working and wont start again.
There is a light grey/white smoke while cranking it up with the electric starter but it wont start, also the decompressionlever does not help.
Diesel direct to the intake does not help.
Startspray into the intake also ich not.
The selenoid does work and the injectionnozzle sprays great.
I made a leakdown test where i could detect only smoke in pushrod shaft.

The compression is about 16bar
Any tips for troubleshooting?

 

[thepumpguysc]

They have a “low oil” shut down on them..
If it has a screw-in dipstick, do not screw it in when checking the level..

 

[90cummins]

If the compression is only 16 bar
233 psi it is too low. Remove valve cover and check for a tight valve if valves are tight adjust if needed.
It’s possible the valve adjustment loosened and the push rod is not in place. Check those & report back.
90cummins

 

[shanana]

Thank you for your replies.
The valves are checked for clearance and are ok and tight.
Pushrods are in place. The decompressionlever works correct.
I attached a picture with the smoke leakdown detection

 

[90cummins]

Hmmmmm!
How was engine running prior?
Was it under a heavy or light load for extended period?
I repaired one several years ago for a contractor who was using the same model generator to power his tools while building an addition in the summer. Basically it was under little to no load for a few weeks.
It was running fine then stopped. Same symptoms would crank with low compression.
During teardown I found valves & seats a bit dirty & rings & cylinder glazed. I cleaned the valves not sure if I ground the seats & replaced the rings & honed the cylinder. & it started & ran fine.
These engines do not like to run under light load.
Based on the compression you reported that’s the problem.
Pull head & get back to us.
90cummins

 

[shanana]

I finally managed to get the head off.
Nothing to see unnormal for me.
I tried some breakcleaner to the intake and had some light dripping through the closed intakevalve. Not much but something

 

[90cummins]

There should be no leakage between valve & seat. Remove valves to see if there is something between valve & seat. Then use lapping compound to clean & verify proper seal. Results will dictate next move.
90cummins

 

[shanana]

The valves and seats look good. I will refit them after lapping. The leakage was minimal. Also no exhaustgases in the intake

 

[90cummins]

The seats are dirty/pitted and I’m guessing the intake valve has a spot that looks burned. Absolutely no fluid should leak by the valve & seat. Diesels are very sensitive to loss of compression. If this was a 6 cylinder engine you may not notice it but a 1 cylinder engine must be in near perfect condition to start cold.
Use compound to lap valves if they don’t completely clean up for a leak free seal replace them likewise with the seats. If they don’t clean up the seats will need to be machined. As for the head gasket being copper it can be reused if necessary.
90cummins

 

[shanana]

After relapping the valves and double check them with break cleaner, the engine still does not start. Next step is to check the pistonrings. I didnt wanted to tear the engine apart but i have no other joice i guess

 

[ponytug]

@shanana I have to say that I am a bit puzzled by an engine with two hours, with great injector spray not starting, but 16bar is more than a little off. How did you measure that value?

When you turn the engine over by hand with the valve cover off, do you see the valves operating? Can you feel the compression? If you can, have you tried adding a few mls of oil into the cylinder and then trying to start it?

Welcome to TBN. Where are you located?

All the best,

Peter