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Dexta-ether dependency

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gerald

07-26-2000 12:16:30




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I've been following the Dexta/Ether chronicles for some time now. I've had my Dexta for a couple of years now and have always (reluctantly) needed ether to start.
I've never condoned the use of ether in ANYTHING but with this tractor I was forced into it. The thing just won't start under 60 deg.F without a "psst" into the air-intake.
The manifold heater works, but there is no "pushbutton" on the tank petcock to squirt fuel into the manifold. This poor old thing has had a long tough life (previous owner has replaced fasteners with woodscrews etc...) but I intend to keep it. Does anyone have a HenryFord Clinic method for breaking the ether dependency?
Thanks in advance

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John G

08-05-2000 13:43:09




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 Re: dexta-ether dependency in reply to gerald, 07-26-2000 12:16:30  
It a good idea to get the valve's ground and lapped and set the valve lash. This is quick and easy and should buy some time before the rebuild.

It worked for me.


Any tips on replacing that darn rear oil seal?



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Brian

07-27-2000 10:22:45




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 Re: dexta-ether dependency in reply to gerald, 07-26-2000 12:16:30  
Chaps,
If you have no "push button" on the fuel tap then your manifold heater is of no use. The button squirts diesel onto the heater element and causes a flame to ignite the fuel in the cylinders as it is drawn in. Without this flame you are in a "no hope" situation.
Some people here have done a modification. Into the injector leak back pipe they have put a few coils of copper pipe to retain some diesel in this pipe. It is then "T" ed into the heater. The heater unit is replaced with a "J-D" unit or one that opens an automatic valve when it gets hot. This sorts out the problem and the diesel tap pump is no longer required.
regards
Brian

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gerald

07-27-2000 12:08:11




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 Re: Re: dexta-ether dependency in reply to Brian, 07-27-2000 10:22:45  
Thanks all, for the help. I've never worked on diesels and my I&T manual isn't much help here. I looked closer at the old guy and see that there is a copper line running from the back of the pump over to the intake manifold. Could this pump a bit of fuel when the engine is cranked? I see there is also a short lever on the pump that seems to pressurize the fuel(possibly)when pumped?
I do like the tractor, feels like an 8N with muscles!and plan to renovate it over the next few years.

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Brian

07-27-2000 12:44:51




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 Re: Re: Re: dexta-ether dependency in reply to gerald, 07-27-2000 12:08:11  
Gerald,
The lever on the pump is to help bleed the fuel system when you change the filters or run out of fuel. Is your pipe from the pump to the manifold "T" ed into the filter side of this? Depending on the age of your tractor, the lines from the injection pump to the intake manifold could be governor pipes rather than fuel pipes. The heater fuel pipe goes into the manifold through a tap and into the heater itself.
regards
Brian

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Kevin(Ont)

07-27-2000 09:56:51




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 Re: dexta-ether dependency in reply to gerald, 07-26-2000 12:16:30  

I had a Super Dexta in a couple of months ago that wouldn't start without pressing the excess fuel button and a puff of ether even when it was warm it also filled the shop with smoke in about 10 seconds. Tested the injectors, 2 out of 3 completly shot 3rd not good. Replaced all 3 tips starts perfect with very little smoke. You still may have worn engine parts as posted earlier, but I would start by having the injectors tested and setting your valve lash. Your tractor should have an inline injection pump so it wouldn't hurt to change the oil in the injection pump as well.

Hope This Helps
Kevin

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Pete Tatham

07-26-2000 22:49:37




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 Re: dexta-ether dependency in reply to gerald, 07-26-2000 12:16:30  
Gerald, Like you I have a Dexta which is addicted to ether. I've always found that ether dependancy is the result of a worn engine - the ether makes up for the lack of compression to fire the fuel. Looks like the only answer is a re-build, new piston rings and/or liners - thats what I'm planning. Regards, Pete.



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Peter A Taylor

08-02-2000 06:58:32




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 Re: Re: dexta-ether dependency in reply to Pete Tatham, 07-26-2000 22:49:37  
My 59 dexta probably needs a rebuild from all of the years of ether use, but I have made do by putting in a freeze plug insert heater, and for the days that I'm planning to use it, I just plug it in for a few hours and it starts up just like it has been running all day. During the winter, I plug it in the night before if I anticipate doing some snow removal, and have put in a thinner oil for the winter to ease the cranking work of the engine. I haven't had to use ether for the past 6 months--This site led me to these solutions. Good Luck

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