574 Gas Tune-up

[Ensorman]

I have been using the Champion plugs in the past. Is there another brand of plug that you would recommend? Do I need a hotter plug for this old tractor?
Thanks for your thoughts.
Also while I am on here. I have a 784 Diesel with fuel leaks coming from up over the engine or in that area. Before exploring the problem. What are your suggestions for attempting to locate the leaking line? Will I have to remove the sheet metal hood? Just wanted to hear some past experiences and outcomes.
Thanks again....

 

[RedMVa]

I have been using the Champion plugs in the past. Is there another brand of plug that you would recommend? Do I need a hotter plug for this old tractor?
Thanks for your thoughts.
Also while I am on here. I have a 784 Diesel with fuel leaks coming from up over the engine or in that area. Before exploring the problem. What are your suggestions for attempting to locate the leaking line? Will I have to remove the sheet metal hood? Just wanted to hear some past experiences and outcomes.
Thanks again....

As far as plugs, I like autolites. A lot of ppl don’t. NGK’s are fine.
On the 784 without seeing it, more than likely it’s the hoses on the injector return lines , that’s what usually leaks up top.

 

[wore out]

I have been using the Champion plugs in the past. Is there another brand of plug that you would recommend? Do I need a hotter plug for this old tractor?
Thanks for your thoughts.
Also while I am on here. I have a 784 Diesel with fuel leaks coming from up over the engine or in that area. Before exploring the problem. What are your suggestions for attempting to locate the leaking line? Will I have to remove the sheet metal hood? Just wanted to hear some past experiences and outcomes.
Thanks again....

What's the "backstory"?

Are you having starting, running, or misfiring issues that have led you to suspect the Champion plugs or the heat range?

 

[old]

I have been using the Champion plugs in the past. Is there another brand of plug that you would recommend? Do I need a hotter plug for this old tractor?
Thanks for your thoughts.
Also while I am on here. I have a 784 Diesel with fuel leaks coming from up over the engine or in that area. Before exploring the problem. What are your suggestions for attempting to locate the leaking line? Will I have to remove the sheet metal hood? Just wanted to hear some past experiences and outcomes.
Thanks again....

Any more the best brand of spark plug is NGK

 

[caterpillar guy]

The braided return hose is the most likely leaking problem. It seems to me they don't last real long either. It also seems to me I got some regular return hoes and some small pinch hoes clamps like used on gas hose and just cut the crimped outer sleeve off then used the regular return hose in it's place with the hose clamps on it. It has been many years since I did that on our 574 so would need to look .I'll be on it today so could look and get back to you on this.

 

[JIM MN]

Hotter plug? Depends what you are doing with the tractor. Not working the tractor, then a hotter plug. Autolites?

 

[BarnyardEngineering]

It's kind of a "duh" answer, but yes, you need to remove the hood to find the leak if you can't see where it is coming from with the hood on. Unless you have X-ray vision, of course, but even if you do you probably don't have X-ray hands and the hood will need to come off to repair the leak.

 

[Ensorman]

Still working on my 574, making progress each day. Run into a snag today. Can't find a fuel pump to replace the leaking old one. Can anyone give me a lead to getting a rebuilt pump or maybe a kit to rebuild the existing pump?
Thanks

 

[used red MN]

Still working on my 574, making progress each day. Run into a snag today. Can't find a fuel pump to replace the leaking old one. Can anyone give me a lead to getting a rebuilt pump or maybe a kit to rebuild the existing pump?
Thanks

The pump number should be 404769R91. Do a web search for that.

 

[wwoodrow]

Still working on my 574, making progress each day. Run into a snag today. Can't find a fuel pump to replace the leaking old one. Can anyone give me a lead to getting a rebuilt pump or maybe a kit to rebuild the existing pump?
Thanks

Where is the pump leaking from ?

 

[Mike Van]

Had to replace mine some years back - leaking from a weep hole. Got it from IH dealer, about 75.00 back then.

 

[caterpillar guy]

You can with the battery cover of see most of the return line to see if it is wet. The hood being off is the easiest way to change the return line. And yes I did just cut the out crimped piece off the old braided line and replace with some return fuel hose and hose clamps.

 

[560Dennis]

Got photos of the plugs ? Easier to make recommendations if see the issues. Hotter plug for a tractor that idles most Of the time.