641 Fuel Shut Off

Metal Man · Mar 12, 2022

I've replaced the fuel shut off 3 or 4 times. The first ones leaked around the stem and the last one wouldn't
seat all the way and flood the carb (another problem I need to fix) when the tractor is not running. Looking
for suggestions what to do next.
Thanks for any help.

Dean · Mar 12, 2022

All of the currently available fuel shut off valves for mid 50s-early 60s vintage Ford gasoline tractors are of abysmal quality. Some leak around the stem right out of the box, some fail to shut off completely, some both.

The screw type valves that leak around the stem can be reliably repaired by replacing the O ring with a quality O ring. Search the Ford Forum for instructions.

There is no currently known repair procedure for the lever style valves.

Recently, a Ford forum member has started building and selling an aluminum adapter block that replaces the factory valve with a readily available brake line and ball valve. Again, search the Ford Forum for details.

The good news: Contrary to popular belief, the valves can be replaced without removing the sheet metal, fuel tank, or rocker arm cover. I've done it so many times that I spend more time removing and replacing the gasoline than I spend replacing the valve.

Dean

warbaby · Mar 12, 2022

Unfortunately, the reproduced shutoffs are junk. You can disassemble it, re-lap the mating surfaces and replace the cheap rubber O-ring with a nitrile one, or put an easy-to-reach, hand-lever shutoff valve from a hardware store or junk drawer inline just before the sediment bulb at the carburettor.

Steve@Advance · Mar 12, 2022

The main reason for a sediment bowl was to trap water.

You're probably running E10, so any manageable amount of water will be absorbed by the ethanol.

You could replace the sediment bowl with a 1/4 inch ball valve.

A short stand pipe and a screen will keep the fuel and trash from coming directly off the bottom of the tank.

showcrop · Mar 12, 2022

2X 1/4 pipe ball valve.

grayrider · Mar 12, 2022

I just ordered this aluminum plate adapter to put on an old 601 Ford, Ive changed the fuel valves so many times it makes my head spin, when this adapter comes in I will put an inline ball valve in for gas shut off

Blackhole49 · Mar 13, 2022

Use the one that floods the carb an install a ball valve after the sediment bowl and leave the valve open.

Bret4207 · Mar 14, 2022

(quoted from post at 14:00:06 03/12/22) The main reason for a sediment bowl was to trap water.

[b:0c3641d96c]You're probably running E10, so any manageable amount of water will be absorbed by the ethanol.[/b:0c3641d96c]

You could replace the sediment bowl with a 1/4 inch ball valve.

A short stand pipe and a screen will keep the fuel and trash from coming directly off the bottom of the tank.

Unless of course the gas you bought is already water logged. Happened to us this winter. Used to be every gas seller had to "dip" their tanks to see how much water was in the bottom using a water detecting paste. Say there was 4" of water in the bottom of a 10K gal tank. You dump in 9K gal of E10 and soon there's only an inch of water in the bottom. Where did the water go? When the moisture in your vehicles tank builds up and the gas is already water logged you are going to get water issues. Happens all the time up here.

641 Fuel Shut Off

Metal Man

Member

Dean

Well-known Member

warbaby

Well-known Member

Steve@Advance

Well-known Member

showcrop

Well-known Member

grayrider

Well-known Member

Blackhole49

Well-known Member

Bret4207

Well-known Member

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