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Will this work ???

J

jCarroll

Well-known Member
Location
mid-Ohio
I bought an Allis B with absolutely no information of it's history. The mag was off the engine, and a rear tire was badly torn - so it had not run recently. Owner was said to have been sick for 10 years.

I have the rear tire replaced, and a friend says the mag is hot. So I'm close to trying to get it running.

First, I propose to pull it around the barn a couple times (in gear) to see if spinning the engine builds oil pressure (it does not have electric start). I don't want to have a running engine to then discover no oil pressure.

Instead of cleaning the gas tank, sediment bowl, and carb and then seeing if it will fire, my idea is to stick my propane torch into the air cleaner intake - with the valve cracked open a little - to see if it fires on propane enriched intake air. If so, I continue the process of cleaning the gasoline fuel parts. If not, I'll have to dig deeper into why it doesn't fire.

Feel free to express your true opinion about this.
 
I think I would clean the carb and stick a temporary gas tank on it. Maybe a better shot at running with a proper gas and air mix?
cvphoto97867.jpg

Old lawn mower tank works great
 
j Carroll,

Once you ready to see if it starts, why not just squirt a little gas in it,?

Put some gas in a plastic bottle, and put a small hole in the cap.

Cheap and safe,

Guido.
 
Rebuilt the carburetor, use gallon can or something as a nurse tank. Propane out of a torch and bottle will not give you the results you desire.

Beagle
 
Good advise on the nurse bottle. And put a few squirts of oil in each cylinder, let it sit a while,and spin it out. Hold your thumb over each plug hole and see if there is some compression on each cylinder. A cylinder with no pressure means a stuck valve.

Might as well start it and watch the oil pressure gauge. It doesn't know if it's running under it's own power or being turned, same end result.

Might want to take the pressure gauge fitting out and pump some oil in the engine oil galley to prime the system and the pump. That will help it get oil pressure faster. Bring the RPM up if it starts, that will get the pump turning faster and sling oil up to the cylinder walls and cam.

Did you crack loose the engine and gear case drain plugs, let any water out? Easier now than after it starts and emulsifies it.
 
Before firing it up, you might want to do some Googling on Allis Chalmers B oil pump prime issues ..... there is some kind of a weak link relating to the cam-driven pump and the whole system losing prime (or some such thing). Link below is a forum discussion on it, there are lots of discussions on line ....
Untitled URL Link
 
If it were me I would start with changing all the fluids. If there is any oil in the coolant or water in the oil that would certainly be a red flag. Then flush out the carburetor and replace any rubber fuel lines and flush any metal lines. I doubt if the oil pump would be in such bad shape you weren't getting any oil pressure. You might squirt a little oil in each cylinder to be sure. If you have a inspection camera it might be good to look in each cylinder to see if there is anything wrong. Instead of using propane to attempt to start it I think I would just use starting fluid.
 
I agree with squirting some gas in the cylinders to see if it pops at all. If the motor has compression, spark and is getting gas you should be able to get it to fire. At the end of the day you will need to clean the fuel system anyway so you may as well get it over with
 
It is very important to oil the cyls on any engine that has sat for that length of time. Once you have the oil changed and pulling it around just have someone walk beside it with a gas spray bottle and spray it into the intake. If you have d add spark and compression she will start right up. You dont want to be using propane , that is a very dry fuel and with dry cyls that is not good.
 
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