Compression Release

/ Compression Release #1  

Anonymous Poster

Epic Contributor
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Sep 27, 2005
Messages
29,678
Can somebody explain to me the proper application/ operation of the compression release lever?

Thanks!
 
/ Compression Release #2  
I use the compression release for all cold starts to pre-lube the engine. Pull the release and crank the engine rapidly til the oil light goes out. Push the handle in and start normally. In extreme cold, if you have "thermostart", fill the bottle with diesel, pull the compression release, turn the key to "thermostart", crank til oil light goes out, then start normally.
 
/ Compression Release #4  
It takes several seconds for the thermostart to really get going. If you take the air cleaner hose off at the motor and turn the thermostart, you can see what it does and know how long to hold it for future reference. If flames don't actually come up off of the igniter you probably need to clean the thermstart unit out. It gets gummed up after setting for long periods of time. Especiallly the ones with a fillable bottle that goes dry.
 
/ Compression Release #5  
Norm
Is there a manual with your wealth of knowledge written
down or is it all through experience

Newbie

Rick
 
/ Compression Release #6  
Nah, Rick, you just have to be old and have spent a lot of years tinkering. I am fairly new to tractors, but am, what I call a "self proclaimed, world class tinkerer".
 
/ Compression Release #7  
Do all Yanmars with thermostart have a re-fillable bottle?
The reason I ask is that my 1401d has TS but I've never filled a bottle or even seen one--am I nuts?
thanks

tony w
 
/ Compression Release #8  
Never ask if you are nuts, it leaves too much of an opening, and sure enough someone may answer you, right or wrong.
 
/ Compression Release
  • Thread Starter
#9  
But if there is no one there and you here an answer, it's not a good sign.
 
/ Compression Release #10  
Tony,
Your 1401 should have a "self filling" reservoir for the thermostart. It is kept full by the overflow or return line from the injectors. So there should be rubber lines linking the injectors together, and then one of the end injectors should have a rubber hose running to one side of a plastic reservoir. There should be a another rubber hose running from the other side of the reservoir to the fuel tank.

For those of you who have the re-fillable reservoirs, I ordered the self filling reservoir from Yanmar (~$13 if I remember right) and plumbed it up on my 1110D which had the re-fillable reservior. It took some hose adapters and different size hose, but works great.
 
/ Compression Release #11  
pruntyc and cfoxmd,
your advice is well-taken! My wife is always willing to vouch for my nuttiness!/w3tcompact/icons/crazy.gif

gbirky, thanks for the info! I knew the TS worked, but just didn't know how--maybe I should actually
look at my manual! I guess I should be happy I have the self-filling type. Do you know if there is any
recommended maintenance on that?
thanks again!
 
/ Compression Release #12  
Could you post a pic of the container? I don't think my 1500 has this either. I have the electrical part but I don't think the unit is plumbed. The only hoses attached to my fuel tank are the main one for the engine feed and a small return line up on top that's a return line from the injectors I believe.
 
/ Compression Release #13  
Marty,
The 1500 does not have the automatic filling reservoir. It has the one you have to refill. I don't have a parts manual for the 1500, but I do have one for my 1110D which as I said has the manual fill reservoir.

The hose you meantioned going from the injectors to the tank is the one I used to go to the automatic refilling reservoir when I replaced the manual one. I have attached a scan of the page from my 1110D manual that shows the TS reservoir. Item 6 is the "manual" reservoir, and item 1 is the TS "plug". This drawing shows that the reservoir mounts directly above the plug and is connected with just a short piece of hose. This is how your 1500 should be.
 

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/ Compression Release #14  
Re: 1500 TS system

Thanks Greg. The scan is just what I needed. I'll go compare this to my tractor. I'm almost certain I do not have this. I'll probably put the manual fill system on it as this would be the stock config and I'm trying to keep my 1500D as stock as practical.
 

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