Dexta pre-cleaner mushroom top

marcusgs · Post by **marcusgs** » Wed Jun 16, 2010 7:36 pm

Hi,

Which is the correct pre-cleaner mushroom top for a 1958 dexta please?

or this one

Regards,

Post by **Brian** » Wed Jun 16, 2010 10:02 pm

Not the top one, they look terrible.

Jerry Coles · Post by **Jerry Coles** » Wed Jun 16, 2010 10:05 pm

Hi
Just popped outside in the dusk to check for you and mine has the lower pre-cleaner (1960).
Regards
Jerry

Jerry Coles · Post by **Jerry Coles** » Wed Jun 16, 2010 10:08 pm

Just a bit puzzled Brian about your picture and then I realised that must be a Petrol model.
Regards
Jerry

terry274 · Post by **terry274** » Wed Jun 16, 2010 10:13 pm

When buying a replacement precleaner, be aware that the air vanes may swirl the air in the opposite direction from the original. If that is the case the air will be swirling in the wrong direction when it hits the vanes in the down tube of the air cleaner. This is hard to explain, but if you look at the vanes in the mushroom and the vanes in the air cleaner you can figure it out. I bought a replacement and ended up repairing my old one because I felt that it did a better job. With the tractor running I can feel the old mushroom "pulse" air out the vents in the top of the mushroom. I have actually seen bits of grass get ejected from the top vents.
Terry

Post by **Brian** » Wed Jun 16, 2010 11:22 pm

Terry, you have raised a very interesting point.

Vanes in the air cleaner?

That is something European Dexta tractors do not have, the down pipe is just a straight tube down to the oil so it does not matter which way the swirl goes.

Have you got a "dry" cleaner? I know that they have two sets on vanes.

Any chance of a picture to add to our knowledge base?

Jerry,

Had you worried there for a minute! Yes that is Dotty. The air cleaner stack is the same as the diesel.

terry274 · Post by **terry274** » Wed Jun 16, 2010 11:48 pm

Here we are looking down into the air cleaner, note the vanes cause a clockwise swirl. It is not a dry cleaner, Brian, you can see the oil in the cup reflecting the camera flash.

This is a picture of my original mushroom, again a clockwise swirl.

And the vents on the outside of the mushroom will through heavy chaff out before it can go down the tube.

Mike Kuscher · Post by **Mike Kuscher** » Thu Jun 17, 2010 12:03 am

Yes, that makes sense.
The vanes are opposite for the export models destined for Australia/New Zealand.
All to do with the direction water swirls down the plug hole.

It's been a long day, I'm going to bed

Mike

Post by **Brian** » Thu Jun 17, 2010 7:16 am

Another new thing learnt!

russelm · Post by **russelm** » Thu Jun 17, 2010 8:13 am

Mine has both sets of vanes to as I was looking at them the other night, will see if I can grab a few pics.

The Swanndri Guy · Post by **The Swanndri Guy** » Thu Jun 17, 2010 8:16 am

So what kind of air cleaner would you use if you had a Dexta on the equator?

YorkshireDextaMan · Post by **YorkshireDextaMan** » Thu Jun 17, 2010 8:30 am

Mine is getting a K&N Cone, I want to go faster, Any body know where i can get a Grommet?

Mark · Post by **Mark** » Sat Jun 19, 2010 5:34 am

YorkshireDextaMan wrote:Mine is getting a K&N Cone, I want to go faster

Let us know how you get on with that, I've never heard of anyone putting a K&N filter on a Dexta before. I wonder if that small a filter will be big enough.

Brian, I guess one doesn't get to old to learn, does one. I didn't know about the vanes either, I'll have to give mine a good looking over.