Bleeding 466 Lines

bluebone · Aug 3, 2010

I put a new set of injectors in the 466 in my 1640 Case IH combine. What is the most effective way to get the air out of the lines? It should only have air between the pump and the injector pump. Thanks in advance.

pete 23 · Aug 3, 2010

Don't have to, just crank her up, they will start right up. All air will be pushed right on through injectors. I'll just add a little more here. So many people are always talking about bleeding air out of hyd or fuel systems. Thing is, unless it is a dead end street like a single action hyd cyl or a brake piston, the air will go right on out ahead of the fluid and you are good to go. Different deal when changing fuel filters etc as the pump has to be able to get ahold of some fluid to move it. Worst thing on a diesel is to try starting them when the pump isn't grabbing fuel, then you get the air trapped in side the pumping plungers so you need to relieve it by opening lines behind plunger like at the injectors. In your case , the pump still has fuel and this model of pump is really very forgiving about any air in the lines to injectors, might take a few extra cranks but not much.

Stuart · Aug 3, 2010

Air wont compress enought to open the injector.
I have had engines that you could crank all day on and get nothing, crack the lines and it starts right up.

bluebone · Aug 3, 2010

Should I crack lines in any specific order? I'll try to just fire it off first, but if not, I'll crack the lines.

Larry B 1486 · Aug 3, 2010

If you only had the injectors out, put the lines back on and start it up. Never had to bleed air out on any IH tractor I ever had, 06-56-66-86 series, at the injectors. I always had to on MF and ford's but never on any IH. Put a set of injectors in my 1486 last spring , 436 motor, put the lines on and started it right up. Same with my 856 this spring.

bluebone · Aug 3, 2010

Thanks guys. I'll just fire it up.

Owen Aaland · Aug 3, 2010

(quoted from post at 14:24:14 08/03/10) Air wont compress enought to open the injector.
I have had engines that you could crank all day on and get nothing, crack the lines and it starts right up.

As long as the pump does not have air in it, it will push the air out through the injectors. The air acts like a spring to push the fuel back to the pump but as long as the delivery valve is holding the air can not push the fuel back into the pump. The pump will continue tio push fuel until all the air is bleed out of the lines.

RoosaMaster pumps as used on cars and pickups is a different matter. They have all but the injection line that is to fire connected together to allow smother idling. They are very difficult to get started without bleeding.

bluebone · Aug 3, 2010

(quoted from post at 18:13:38 08/03/10) I put a new set of injectors in the 466 in my 1640 Case IH combine. What is the most effective way to get the air out of the lines? It should only have air between the pump and the injector pump. Thanks in advance.

It started right up, but I had not installed a couple of seals properly, so in the morning I will fix that and give her a whirl. I've still got a month and half before I cut any beans, so I've got time to get the ol' girl in top shape.

pete 23 · Aug 3, 2010

In that case the problem would be that the trapped air is before the delivery valve and not after it. Even with the Roosa Master pumps, if you run fuel through them after assembly you can hook all lines and they will crank right up.

Bleeding 466 Lines

bluebone

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pete 23

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Stuart

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bluebone

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Larry B 1486

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bluebone

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Owen Aaland

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bluebone

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pete 23

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