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Allis Road Grader

A

Anonymous-0

Well-known Member
Hi all... Im new at these forums looking for information we have a 1940's (i am pretty sure) allis road grader. The engine starts on gas then after warmed up switch manually to diesel.... The engine and road grader work great once running on diesel, but getting it started on gas is becoming a task. Is there any way to eliminate the need to start on gas? Is there a block heater that can be implemented? A stronger starter to overcome the diesel compression?

Thank you

Kenny
 
Are you sure this isn't a IHC? They were the only ones I know of that start on gas and switch to diesel after warming up. Do you switch back to gas to get all the diesel fuel out of the cylinders before you shut it down? That will make a big diffrence how it starts.
 
thanks for the quick reply... I am not 100% sure of what it is .... any way to tell?

I know it starts on gas then runs on diesel... and when we shut it down we let it run on gas then shut it down after a few minutes.

is it possibly a allis road grader with a IHC engine?

I have to dig into this a lot more.... its a great machine but its very old and has been messed with my many people.

thanks for the response i will try to get more info

kenny
 
Sounds like you have an after market set up on a Farmall MD which would start on gas then switch to diesel I have NEVER heard of or seen an AC that did that but IH/Farmall where common for that set up
 
My mistake.... after reading all these old books (it can get confusing) I beleive it might be an old Austin Weston Grader sorry about that....

In any case... do you think a heat blanket wrapped around the block and brought up to 180F would allow me to start on diesel?

i have some old heat blankets that i may try...

eventually ill get it to run on gas again, I think if it get it going one way or another then switch to gas ill see if it just wants to stall or try to run... I was not there but my dad said he tried it and it popped a few times but never really took... I have to get up there to try, the grader sits on property that is not right near home.

any information helps... Im new at all this old stuff

thanks, Kenny
 
I ran one for the county in 70s was a Galion but no difference in IH engines, They will start by pulling with a tractor but will smoke cough belch until enough internal heat is created. is it 4 or 6 cyl?
 
it is a 4 cyl the old owner who has recently left us said he had a lazy injector that worked only when real warm.

everything is hydorlyc so pull starting may not be a good idea
 
About all trying to start it on the diesel side will do is burn up the starter. The starters where not made to handle the high compression of the diesel side of that engine but made for the low compression of the gas side.
 
The motor should be a ud9 or ud14 and these must be hot before transfert on diesel because you will crack the head.
 
From growing up with the gas to diesel switchers we found that most people don't pay attention to the gas side tuneups i.e. points or magneto and sparkplugs if it's a mag engine then the mag needs looked at because moisture becomes an issue and cracked dist caps electrical systems are issues because the on-off button has to be on for the system to charge I would suggest doing a full gas side tuneup electrically and make sure the gas tank sediment bulb screen is clean and no water in the tank. Basically you have two engines in one. I've been there many times pulling those dudes is no fun especially in the winter. I'm not sure what a weak injector has to do with it unless it is missing after you convert and it is missing. IMHO
 
Easier said then done, i am having enough trouble trying to put a inline 6 into my F250

the road grader does not need a engine swap it needs a tune up i think

kenny
 
I wanted to clarify some things:

1. It is actually a austin western motor grader with the UD-14.

Since starting it on diesel is not an option I may begin a new thread on tuning up the gas portion of the engine, I do not mind doing the work, but nuts and bolts 60+ years old do not like to be touched

kenny
 
If you plan on using it, You"ll see how well those IH diesel-gas magizzies work. Better you than me.
 
I have the Adams 550 grader with basically the same engine. The mag was trouble for me. So, what I did was convert it over to a coil set up. I basically screwed throught he top of the mag. That screw was then routed to a coil I wired up. It works like a charm. Spark is nice and hot. Nobody work on mags around here anymore, so I was forced to do something, even if it was wrong. It was 10 years ago I did this, so I'm jogging my memory if I'm leaving out some info here.
 
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