Kluge valve cover breather

[Patopat]

Hi all,
So thanks to all the combined knowledge coursing through this site and by poring over the manual, I managed to change all the oils and coolant (still have to do the final drives!) and put my ‘76 to work spreading gravel for my parking pad and scraping off the saplings and raspberry bushes that were growing over my septic fields. At one point had a stalling/ governor surging thing happening, but shot some carb cleaner down the main jet (with the carb still on the cub) and straightened it out. Still want to do an ignition tuneup,

timing and valve lash adjustment, but it seems to run really strong. Noticed a funny non factory breather tube from the valve cover that runs into the air cleaner hose, into a drilled hole with plumbing fittings. See pic. What is up with this?
Thanks for your help
Pat

[Don McCombs]

Early Cubs had a crankcase ventilation system, of sorts. But, by 76 it had been eliminated. Probably because it plugged up easily and didn’t work thereafter.

[Patopat]

I see, so could this be deleted on mine? It’s not sealed very well and seems to just be a way to suck oil into the carb!
Pat

[Don McCombs]

I don’t see why not.

[Eugene]

You can remove it. I would leave it attached for a while. See how the tractor performs. How frequently the spark plugs foul.

I would wait until I adjusted the valve/tappet clearance. Then patch the valve cover hole and the air cleaner hose.

Guessing, someone installed it to reduce obvious blowby from the oil filler tube.

[Gary Dotson]

Personally, I don’t think it’s a bad idea, if it done in a tidy manner. Look at the crankcase breather systems on any small engine built in the past 40 years, exact same idea.

[welderrx]

I've, actually thought about doing that with a PCV valve and put it into the Intake at the vacuum fitting. The issue is will it then load the breather on the dipstick up with chaff & Dust ? On second thought I think its gonna stay the way they built it, its worked on my Cub since 1952 and my Lo-Boy since 1968 ! TJ