Yellow exhaust

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drsmith
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Yellow exhaust

Post by drsmith » Sun Nov 13, 2016 6:26 pm

I am trying to source a yellow exhaust for a 990 implematic can anyone please recommend any distributers I could try.

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dexta
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RE: Yellow exhaust

Post by dexta » Sun Nov 13, 2016 8:26 pm

i am sure if you try Peter Williams at www.davidbrownparts.com he could assist you
Cheers

Dex

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GeoffDEAL
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RE: Yellow exhaust

Post by GeoffDEAL » Sat Nov 19, 2016 11:11 pm

Interesting point who did the original enamal coated exhausts, was it DB or an outside supplier, they certainly lasted for years. Could probably be done with heat resistant exhaust paint like VHT that lasts well.

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DB780
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Post by DB780 » Sun Nov 20, 2016 8:46 am

Got a red from Dunlop Tractor spares in Ireland. It as been fine for a few years now so perhaps the yellow ones will be as good.

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case-ih1594
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Post by case-ih1594 » Sun Nov 20, 2016 8:50 am

It has probably been mentioned before but there was supposedly some kind of legislation (probably European!) that prevented the use of some colours in the exhaust, and they ended up all being black. Id imagine DB bought them from an outside supplier such as 'Burgess', even though some are stamped DB.

The ones you get now may be ok for the odd road run and ploughing match but the tractors are unlikely to be accumulating the hours they were when they were new.

Scooby
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Post by Scooby » Sun Nov 20, 2016 10:51 am

We have been very fortunate insofar as having Alan Kellett on board who has seen this Forum topic and has emailed me the following :

The yellow Implematic pipes were mainly sourced from Burgess with a few coming from Chilcott.The uncoated pipes were then despatched to TRICO, aka The Rustless Iron COmpany, Lawkeholme Lane, Keighley,Yorks. Still in business I gather, but at a different location.

There the pipes were vitreous enamelled the familiar primrose yellow.This was done by coating with a zinc oxide powder mixed with a yellow colouring agent and then placing in a furnace at 835 degrees C. Effectively this converted the mix into yellow coloured glass capable of withstanding any exhaust temp the engine could generate. The only downside of this process being that the enamel was prone to chipping if knocked.

Due to the cadmium emissions created in the yellow variation process and current emission regs this process is now very difficult /costly to replicate. Black and dark red easily done.Yellow and poppy red not so easy. After vitreous ,the next best option is PC, powder coating, where appropriately coloured powder is electrostatically applied to the pipe and then baked in an oven at 200 degrees C . This process will withstand an exhaust temp of up to 170 degrees C approx.

Thus when worked hard the short stub section of pipe which slides over the engine exhaust manifold will burn off the colouring fairly quickly but depending on engine load the remainder of the pipe will retain its colour for an acceptable period.

Advantages of this process are a high sheen ,non chip finish at a reasonable cost.


And please remember that Alan was Product Training Instructor at Meltham Hall and was also a major contributor to the Main Menu option The Selectamatic Hydraulic System.
ImageImage


Three is twee, four does snore, but 6 just clicks........Scooby

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drsmith
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Yellow exhaust

Post by drsmith » Sun Nov 20, 2016 6:16 pm

I found one on NC Tractor spares in Ireland and put in an order only to be emailed back sayiny they could no longer source them.After scouring the internet again I think I have managed to get one from John Conaty Ltd again in Ireland.

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drsmith
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yellow exhaust

Post by drsmith » Wed Nov 23, 2016 8:09 pm

Just took delivery today of my new yellow exhaust from Ireland it was ordered on Sunday and I am very pleased with it and the first class service I got.

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