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Tool to clean injectors?


 
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circus
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PostPosted: Thu Feb 14, 2008 3:54 am    Post subject: Tool to clean injectors? Reply to specific post Reply with quote

Tool to clean injectors? Diesel injector pump was being pumped full of air. Loosened tubing to individual injectors until the engine would run. Took the suspect injector to be tested. Was told it's ok and I needed a new injector pump Sad. Blew air backwards through the injector "That's not right". Had it retested. It's bad. Hallelujah! Reinstalled the bad injector and the tractor ran normally. Is there a tool that would clean the guck out of the injectors?
 
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Joe(TX)
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PostPosted: Thu Feb 14, 2008 4:52 am    Post subject: Re: Tool to clean injectors? Reply to specific post Reply with quote

Take it to a good shop.
You have to disasemble the injector to clean it. The cleaning tool consists of very small wires. You also will need a tester as you have to set the pressures on the injector after reassembly.
Blowing through an injector will do no good since there is a valve in the injector that requires a much higher pressure to open than you get from an air hose.
 
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JDemaris
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PostPosted: Thu Feb 14, 2008 10:52 am    Post subject: Re: Tool to clean injectors? Reply to specific post Reply with quote

Only certain types of injectors can be cleaned with wires. Some injectors, e.g. "pintle" injectors don't have small holes to clean.
My Deere and Case diesels have pencil injectors that use orifices that can be cleaned out with wired.
My IH and AC diesels have pintle injectors, as does my Deere 2010, and GM and Ford diesel pickup trucks.
 
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Bob Huntress
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PostPosted: Thu Feb 14, 2008 5:39 pm    Post subject: Re: Tool to clean injectors? Reply to specific post Reply with quote

There is a tool for cleaning out the nozzle. It is a set of small drill bit looking cleaning rods. If you do disassemble the injector(If you have to ask, I recommend that you merely remove and replace), it is one of those tasks that requires a very clean work area. I use the kitchen. When reassembling the injector, often the plunger will appear to be to large for the barrel. If you sit the plunger over the barrel, and leave it, it will cool enough to drop into place in a few minutes. It is actually pretty cool to watch it start to rattle slightly and just drop into place. Keep all parts submerged in diesel, and remember that you can't be over concerned with clean. I don't even use regular shop rags to prevent lint from damaging the tight clearances.
 
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Joe(TX)
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PostPosted: Fri Feb 15, 2008 5:30 am    Post subject: Re: Tool to clean injectors? Reply to specific post Reply with quote

Not all AC use that type, both my Allis Chamers tractors have injectors with the small holes.
I assumed he had the type most common in older tractors.
 
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Circus
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PostPosted: Fri Feb 15, 2008 1:06 pm    Post subject: Knock on wood Reply to specific post Reply with quote

Happened again. Twice. But to a different injector. After watching the horror of antifreeze filling the cylinder because the copper sleeve came out with the injector, I stopped pulling injectors.
A fuel filter failed so I replaced the filters and flushed out the contaminated fuel. The injector pump couldn't purge the obstruction from the impaired injector because the back wash from piston emptied the tube.
So to make the engine run on the remaining cylinders, I had to removed the injector tube, run a hose from the pump outlet to the fuel tank. Hooked up a borrowed injector tester to the impaired injector and pumped while the engine ran. After about an ounce of pumping I reassembled the system and now it works great. Knock on wood. Minimec Simms
 
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