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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

removing fuel injectors

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bob steers

09-01-2007 12:09:43




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I have been trying to remove the injectors on my 1935 cat 50 diesel. Two came out with no trouble but the other two are stuck tight.
Tried spraying with pb blaster.But there is a lip that keeps it from going down the side.
Does anyone know of a tool to remove tham.

Thanks Bob
ofallon mo.




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BrianA

09-04-2007 13:45:56




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 Re: removing fuel injectors in reply to bob steers, 09-01-2007 12:09:43  
You could try a little heat from a brazing tip? When ti's still warm rub some candle wax around the injector, then get under the hold down clamp (if equipted) with a crows foot or ladyslipper. Worked for me on an old TD 18-a. good luck



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NC Wayne

09-01-2007 19:08:11




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 Re: removing fuel injectors in reply to bob steers, 09-01-2007 12:09:43  
If you can find a nut to fit the injectors, where the line would normally screw on. If you can come up with an old injector line nut fine, if not you can usually find a regular nut with the same thread that will work just as well. When you have the nut use it to make an attachment for a slide hammer. Typically when their stuck to the point that prying, etc won't get them out this will work because you can get a straight pull on them and with the hammer you also get the shock effect to break them loose. Good luck.

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bob steers

09-02-2007 08:06:43




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 Re: removing fuel injectors in reply to NC Wayne, 09-01-2007 19:08:11  
Wayne thanks for the fast response.

My injectors have a bolt in the top that holds a small return line. The main fuel line comes in at the side near the bottom. Are you talking about the small bolt in the top of the injector?

Thanks Bob



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NC Wayne

09-02-2007 20:47:40




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 Re: removing fuel injectors in reply to bob steers, 09-02-2007 08:06:43  
Hey Bob, I was picturing another style (ie- the wrong) type of injector when I replied. Sorry. How is the injector held down? Depending on the way the injector body is made there are special pullers made for some of the different types. Most of the ones I see routinely I've had good luck doing like I described without a "special" puller. Still I don't see why you couldn't use the smaller hole the same way, providing you can find a bolt with the proper thread and also providing there is enough thread depth to handle the force of pulling on it. The usual rule of thumb is you need at least as much thread depth as the diameter of the bolt to achieve full strength, and the more thread depth the better. If you can find a bolt and, most importantly, get it threaded in tight, you'd be suprised how much pull you can apply to that bolt. Even a bolt as small as 1/4 inch will handle alot of straight line pull without damaging the threads, if it's tight. The good thing is when you can get a straight pull and a little vibration and shock from a slide hammer it typically doesn't take alot to pull one straight out, even when prying, etc hasn't worked. If the body of the injector has two slots for the hold down clamp to slid into you can make yourself a puller that uses these notches. Try cutting a notch in a piece of material as thick as the notch is and then bending it in a U shape. This way it can slide in the notch and you can still pull in a straignt line with the injector. Thoe are the two best suggestions I can give right now without actually seeing the injector. Beyond that I don't know what else to tell you other than to keep the Blaster flowing and keep trying. Everyone, myself included, gets over anxious when it comes to penetrants and expects them to work alot quicker than they were designed to do. Give it a few days and keep the injectors soaked and see what happens then. Good luck..

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