RD6 no compression

Hi Pete,
some things I can think of to check are :-

1/ moisture under the rocker cover has caused rust, or ice if you are in a cold area, that has stuck the valve spring guides, that stop side pressure being exerted on the valve stems, they are about 2" diameter and 3" long from memory. Also a good time to adjust the valve and decompression lashes.

Cold adjustment lash Inlet & Exhaust 0.014" Reset valve lash when engine is hot.

HOT adjustment lash 0.012" Compression release 0.025"/0.030"

2/ the key on the decompression shaft to secure the lever has sheared or is missing so that the lever slips and does not turn the shaft.

Let us know what you find and we can go on from there.
Cheers,
Eddie B.

Most of that kind of filters have a number printed on the cloth or stamped on a metal tag crimped on somewhere. You might try rinsing the bag off with diesel and see if you can make out any numbers.

No oil ports were on the original oil filter and it used two washable screen elements, no disposable element, no spring was used.

A picture would help sort it out as they went through several field change overs, none of which used a bag type filter/element.

Field changeovers all have oil line ports.

my email is [email protected]

If you email me directly I can send you some pictures. I cant figure out how to put them on this site.

Thanks Pete

OK, I can do that but probably best to start here.
This is what it should have by your filter base description.

The lower housing looks correct however the upper can is taller. I am suspicious because somebody fabricated a spacer for the air intake pipe on the opposite side of the engine that lifted the air cleaner up higher above the lube filter. It may be that the current upper portion of the filter has been borrowed from another machine for added filter capacity.

Does your taller version still have a T handle on the top?

No it has a nut with a slot cut in it and a bolt out the bottom about 6" long that screws into the base. The upper can is about twice as tall as your drawing lid.