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Re: LA Case fuel tank question

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Ron Sa

10-30-2012 06:34:42

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Your approach to your rust problem seems to be to get rid of the rust. Thats a good approach but generally difficult to do.

Another effective way to keep rust from plugging the fuel line is to install a short standpipe (about 3/4 inch tall) into the inlet of the sediment bowl assembly.

I use copper tubing and a drill bit the same size as the OD of the tubing. I enlarge the sediment bowl inlet about 3/4 inch deep and loctite the copper standpipe in place.

This solves my rusty tank problems and I only loose a pint or two of fuel tank capacity.

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Bob in Australia

10-30-2012 14:28:39

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 Re: LA Case fuel tank question in reply to Ron Sa, 10-30-2012 06:34:42  
Thanks, I knew I would get the answer here.

Knew about the sealer, but it is difficult to get here. I will try Ron's solution.

The top of the tank is actually rusted through. I have a parts tractor and the tank on it is also rusty, but not rusted through.

Thanks again!

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Ron Sa

10-31-2012 07:36:23

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 Re: LA Case fuel tank question in reply to Bob in Australia, 10-30-2012 14:28:39  
Rust is about 7.6 times more dense than gasoline so rust flakes and rust grit tends to "sink like a rock". Rust powder is generally too fine to plug the system.

The majority of tractor operations on rough ground will cause the rust to skoot a little on the bottom. More active skoot will occur as the tank gets low on fuel but the rust is very reluctant to launch off the bottom. Sediment bowls do not launch sediment and neither does tank sloosh launch coarse rust generally speaking.

A powered refueling nozzle may cause the flakes and grit to experience much greater agitation that sloosh and thus get picked up off the bottom until the refueling stops or until the fuel gets deep.

Pointing any refueling method away from the standpipe will produce near zero chance of flakes or grit coming down on the standpipe's opening.

All the gasoline around here has ethanaol which absorbs any water but can cause other problems.

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Christopher Mikesell

10-30-2012 14:57:18

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 Re: LA Case fuel tank question in reply to Bob in Australia, 10-30-2012 14:28:39  
Ron's solution works well as long as you are not trying to use the tractor for serious work. However, bumps and high speed running can still clog the top of the sediment bowl assembly. Also, the tube tends to let water collect in the bottom of the tank when the tractor isn't exercised. I would suggest that you at least try to clean the worst of the rust out first. I don't like adding tubes myself, but I have done it to several machines at work and it does make a big improvement. If you don't want to mess with hours of cleaning effort followed by repeated cleaning of the top of the float bowl assembly, then this is your ticket. I prefer to get it clean, keep it clean, and then not worry about it. My way is definetly more work.

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