A bit of advice on liner seals needed

This forum is for the Fordson New Major, including the Super Major and the Power Major.
Post Reply
Nick
True Blue
Posts: 712
Joined: Thu Jun 03, 2010 8:52 am
Location: Somerset UK

A bit of advice on liner seals needed

Post by Nick »

I feel like a child at christmas, the stuff for my engine turned up today! Ive taken the old liners and seals out. I was just wondering, there seems to be a couple bits where rust has eaten the inside of the block a bit, nothing serious i think, because theres still a nice seal groove.
Can i build the surface up with anything or protect it from getting worse?
Or do i just leave it?

Brian
Grumpy
Grumpy
Posts: 5216
Joined: Wed Apr 16, 2008 2:07 pm
Location: Norfolk, England.

Post by Brian »

Molecular Metal works well.
Fordson Tractor Pages, now officially linked to: Fordson Tractor Club of Australia, Ford and Fordson Association and Blue Force.
Brian

Grani
True Blue
Posts: 508
Joined: Mon May 05, 2008 12:18 pm
Location: Finland

Post by Grani »

It is better to fix i now or you are going to do it later anyway. Here is some pictures of my groove fixing with chemical metal and protection with tar. I choose a better quality of O-rings than the ones that came with the gasket set. They was of type Viton http://www.dupontelastomers.com/viton/?id=wikiviton
Here is some pictures of the procedure.
The old O-ring had leaking problem at the bottom of the groove.
http://i179.photobucket.com/albums/w315 ... /007-3.jpg
Corroded spots are easy to find with a mirror.
http://i179.photobucket.com/albums/w315 ... /002-6.jpg
Here the same spot after the repair with chemical metal.
http://i179.photobucket.com/albums/w315 ... /003-4.jpg
Tar spray to protect corrosion.
http://i179.photobucket.com/albums/w315 ... /011-2.jpg
The Viton O-ring in the grove.
http://i179.photobucket.com/albums/w315 ... /003-7.jpg
This was my method of repairing this type of problem and I give no guarantee of durability, or that this would be the best way to do it.

Nick
True Blue
Posts: 712
Joined: Thu Jun 03, 2010 8:52 am
Location: Somerset UK

Post by Nick »

excellent, i shall have a go at that later on. as for the tar you used, looks like it was an aerosol of some type. what was its brand name?

Grani
True Blue
Posts: 508
Joined: Mon May 05, 2008 12:18 pm
Location: Finland

Post by Grani »

Nick wrote:excellent, i shall have a go at that later on. as for the tar you used, looks like it was an aerosol of some type. what was its brand name?
It i a wery local product, and with local i mean it´s manufactured 1km away from here. :lol: I don´t think they have world wide export. Of course it don´t have to be an aerosol for this application.
http://www.attuote.fi/eng/index.php?node_id=2038

Nick
True Blue
Posts: 712
Joined: Thu Jun 03, 2010 8:52 am
Location: Somerset UK

Post by Nick »

i take it that bitumen would do the same job? in your pictures, is the rusted bit, above or below the o-ring (looking from the top of the block).

Grani
True Blue
Posts: 508
Joined: Mon May 05, 2008 12:18 pm
Location: Finland

Post by Grani »

Nick wrote:i take it that bitumen would do the same job? in your pictures, is the rusted bit, above or below the o-ring (looking from the top of the block).
It is in the bottom of the groove as you can see on the marks on the O-ring in the first picture.

Nick
True Blue
Posts: 712
Joined: Thu Jun 03, 2010 8:52 am
Location: Somerset UK

Post by Nick »

the marks on mine are in the top bit of the seal, the bottom bits are spotless.
out of interest, ive just trial fitted both sets of o-rings (i have the double type) and the bottom ones are perfect, but the top ones are too small, do you stretch them around the liners then put them in, or are they the wrong size?

Brian
Grumpy
Grumpy
Posts: 5216
Joined: Wed Apr 16, 2008 2:07 pm
Location: Norfolk, England.

Post by Brian »

Could be the wrong size, they swhould fit like the bottom ones. Otherwise they will push out as the liner goes through and jam it.
Fordson Tractor Pages, now officially linked to: Fordson Tractor Club of Australia, Ford and Fordson Association and Blue Force.
Brian

Nick
True Blue
Posts: 712
Joined: Thu Jun 03, 2010 8:52 am
Location: Somerset UK

Post by Nick »

in that case they are the wrong size, because they go in about 80% around, but then because they arent big enough they pull out. They are exactly the same size (external surface) as the larger bottom seals, i wonder whether its a balls up by the company.
or i could stretch them a bit :?

Supermanuel
True Blue
Posts: 53
Joined: Wed Sep 22, 2010 7:07 pm
Location: Espoo, Finland

Post by Supermanuel »

The original O-rings are of nitrile rubber which tends to harden at 80 C temperatures. I tried to measure them and it gave a material thickness of 4,65 mm.

The ones I used are red slikone O-rings. Size 5 x 110 mm. They came from Holland. This material stands for temperatures over 200 degree Celsius and is sealing better due to the properties of the material. An easy check to control that they are silikone can be made as follows, Drop a pen (not sharp end) on the material. From silicone it will bounce much higher than from nitrile rubber. Normally the material for silicone rings is red.

The tar used is not coal tar. This tar here was one of the greatest export articles from this country 100-300 years ago. Made of pine. Has nothing to do with coal tar or bitumen. Still used for many purposes due to its superior capasity to stop rust in threads. No differences if applied yesterday or for 100 years ago. Locks the nut and keeps thread protected. I have opened nuts with tar from abt 1940. The well known odor told me that tar had kept the thread as new all these years. Sanitary silicone cannot be used there because the acid contained causes rusting.
New Performance Super Major Manuel 08D970466

Nick
True Blue
Posts: 712
Joined: Thu Jun 03, 2010 8:52 am
Location: Somerset UK

Post by Nick »

well just phoned the company i bought the kit from, and it seems a new company had started supplying the o-rings, and they were made the same outside diamter as the lower liner seals, so they are too small.
What i found funny, was he is now going to have to sort through thousands of seals, to find the good ones!
They are sending me some new ones asap

Kim
True Blue
Posts: 195
Joined: Thu Jan 15, 2009 11:20 pm
Location: Central Massachusetts, USA

A bit of advice on liner seals needed

Post by Kim »

Thank you Supermanuel! I have had a quart can labeled Pine Tar for years and had no idea of what its use was. I used some to help graft an orphan lamb onto a ewe, but had no idea it was for mechanical use. :shock:
Never give up!

Post Reply