Got my tractor today!!!

Jagmandave · Aug 27, 2007

That engine looks like it has a water pump, you can run a 50/50 mix with that, only the ones that cool by thermosiphon need the lower mix rate.

Looks like a nice little tractor, you should really enjoy it!

mark777 · Aug 27, 2007

The YM1401 has a water pump.

Mark

LMTC · Aug 27, 2007

Why on earth would you want a 50/50 mix unless your winter temps go down to -34*F? Anti-freeze is just that....it is not anti-heat. The higher the glycol concentration, the less the fluid dissipates heat, so the less effective it is at cooling your engine.

dieselfuelonly · Aug 27, 2007

Is running a 30/70 antifreeze/water ratio OK for it though until it gets cold?

Grrrr · Aug 27, 2007

dieselfuelonly said:
Is running a 30/70 antifreeze/water ratio OK for it though until it gets cold?

Thats what all our tractor run on

P.S. I think you got a great deal on your tractor.

Can you explain a bit mroe abotu the compression release. I know nothing about it? Never seen one before (at least I don't think I have)

Grrrr · Aug 27, 2007

dieselfuelonly said:
Is running a 30/70 antifreeze/water ratio OK for it though until it gets cold?

Thats what all our tractor run on

P.S. I think you got a great deal on your tractor.

Can you explain a bit mroe abotu the compression release. I know nothing about it? Never seen one before (at least I don't think I have)

California · Aug 27, 2007

Grrrr said:
Can you explain a bit more about the compression release. Never seen one before (at least I don't think I have)

Take a look at an old British thumper (big single) motorcycle. They all had them. The release is a lever that pushes down on the exhaust valve when you actuate it, ie pull the lever or whatever. It allows the engine to turn over with no resistance from compression.

On the BSA and AJS singles I owned you had to begin the kickstart stroke from a certain point in the crankshaft rotation. The compression release made it possible to get to that point.

Grrrr · Aug 27, 2007

California said:
Take a look at an old British thumper (big single) motorcycle. They all had them. The release is a lever that pushes down on the exhaust valve when you actuate it, ie pull the lever or whatever. It allows the engine to turn over with no resistance from compression.

On the BSA and AJS singles I owned you had to begin the kickstart stroke from a certain point in the crankshaft rotation. The compression release made it possible to get to that point.

Thanks. I thought it was something like that but was not sure.

I still feel a bit stupid, why does it help with starting a tractor? I can see how it would help with a kickstart.

California · Aug 27, 2007

Grrrr said:
Thanks. I thought it was something like that but was not sure.

I still feel a bit stupid, why does it help with starting a tractor? I can see how it would help with a kickstart.

1) It allows oil to be circulated, and oil pressure built up, without any of the stress on the rod bearings that a dry start would cause.

2) It reduces the load that the starter sees. Beginning a start with the compression released means that the starter is facing only the inertia of the heavy flywheel. Then a moment later the release is closed and that flywheel inertia helps push the crank through its first compression stroke.

Listen to the audio recording of a start at the bottom of my sig photo page. First it spins easily, then I drop the compression release and it stumbles through a partial compression stroke that was too lean to fire, then it fires on the first proper compression stroke. (If you play that in slow motion the stages are more obvious.) The old battery I was using at the time might have struggled through a few slow compression strokes before getting the crankshaft fast enough to fire, if I hadn't used the release.

Grrrr · Aug 27, 2007

California said:
1) It allows oil to be circulated, and oil pressure built up, without any of the stress on the rod bearings that a dry start would cause.

2) It reduces the load that the starter sees. Beginning a start with the compression released means that the starter is facing only the inertia of the heavy flywheel. Then a moment later the release is closed and that flywheel inertia helps push the crank through its first compression stroke.

Listen to the audio recording of a start at the bottom of my sig photo page. First it spins easily, then I drop the compression release and it stumbles through a partial compression stroke that was too lean to fire, then it fires on the first proper compression stroke. (If you play that in slow motion the stages are more obvious.) The old battery I was using at the time might have struggled through a few slow compression strokes before getting the crankshaft fast enough to fire, if I hadn't used the release.

Thanks for that, now I totaly understand. I didn't realise you could let it out while the engine was spinning.