no oil pressure

[Josh Cartey]

This message is a reply to an archived post by Josh Cartey on July 05, 2012 at 14:42:05.
The original subject was "no oil pressure".

I have now drained the oil and changed it. There was a lot of sludge in the bottom of the crankcase. I cleaned it all out and refilled with new oil. Started the tractor up for a min and it started to knock. Shut it down immediately. So now it"s getting no oil. Any ideas?
 

[F-I-T]

Year, make, model of tractor?
 

[rickdeere]

if its a johndeere the oil coupler might have broken,you can take the rod cover off and look down in the to see if oil pump shaft is turning.
 

[Josh Cartey]

1949 John deere A.
 

[J. Everett]

I can only "hope" that you changed the oil filter as well. It will also be covered and plugged by the same sludge...thus no oil pressure. Best of luck .
 

[rickdeere]

Just changing oil doesnt stop oil pressure. What all did you do????
 

[wijim]

Oil pump drive coupler broke I bet.
 

[elkcagg]

Did you clean the screen around the pump inside the crankcase? Did you have pressure before changing oil? If you did, you may have overtightened the oil filter nut and collapsed the canister.
 

[F-I-T]

[Josh Cartey]

Ok here is the full story. I have had the tractor for eight years. I
have ran it those eight years many of times at parades and
tractor shows. It had an old oil pressure gauge on it that didn't
work. I assume it was getting oil and had oil pressure those
eight years because its never had any problems. I bought new
gauges for it back in July. When I got those installed I noticed
the oil pressure gauge said nothing. I quit working on it till now.
Yesterday I decided to change the oil and filter cause it had
never been done. It had lots of sludge in the bottom of
crankcase. I cleaned it out and refilled with oil and new filter. I
started it up and after running for a minute it started knocking.
Shut it down immediately. I know that changing the oil and
filter should not make it stop getting oil but it must of been
getting oil previously since in never knocked before. That's
where I'm at now.
 

[F-I-T]

[Fredsjdb]

Josh, when I bought my 50 A it had no oil pressure. I checked the coupler and it was still intact. I found someone overtightened the oil filter cover nut breaking the oil pressure regulator housing that is located on top of the filter canister. If this is your problem it can be fixed without tearing to much of the tractor up. It's not a fun job. You"ll have to locate a replacement oil pressure regulator and probably a new stud. Check to see if you can remove the filter cover, if it just spins that"s a good indication the oil pressure regulator has been broken. Good luck. Fred
 

[rickdeere]

Now how did you get sludge out????? And did you use john deere oil filter?????now if you didnt use john deerer oil filter get one, and take oil line off turn engine by hand until oil comes out line.something is just not adding up, also you should never run a tractor without oil gauge, aftermarket oil gauges never read correctly either always way lower than the real ones.
 

[rickdeere]

When I replace canister top on my b I had to pull the entire block so I could have room to work, A,s are some bigger.
 

[Josh Cartey]

I have looked at it and it appears to be a broken coupler.
Looks to be cracked looking through the crankcase cover.
Bout to tear it apart to fix. Thanks for the help everyone! It's
been quite a few years since I worked on one. Just needed a
little refreshing.