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Tool Talk Discussion Forum

HF engine cleaning gun

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JR in TX

08-18-2005 11:27:10




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I have a question. I just picked up an engine cleaner at Harbor Freight. It is a spray gun that runs off your compressor. It has a pickup hose that injects cleaner into the air stream. I tried it last night and it works great! But, is it safe?? I cleaned the inside of a JD A transmission using diesel. The gun makes a very fine mist / vapor of the fuel. I can avoid inhaling this mist, but is it explosive?? I got worried last night as I saw this mist rising up towards my shop lights. Almost looks like smoke. What should I use, is this safe?

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Don L C

08-19-2005 16:55:47




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 Re: HF engine cleaning gun in reply to JR in TX, 08-18-2005 11:27:10  
Try "SIMPLE GREEN",mix 50/50 with water....Lowes has it....



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Catskill Pete

08-19-2005 12:52:06




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 Re: HF engine cleaning gun in reply to JR in TX, 08-18-2005 11:27:10  
What I have found works about as well as the more expensive stuff is simply to fill a gallon jug with warm water and add a healthy shot of dishwashing detergent to it. For really heavy or dried grease nothing you feed through the gun is going to work all that well. Better to use some kind of spray degreaser and let it sit a few minutes, then use the gun on it. I really like my gun for places I dont want to use a pressure washer, for instance in the engine compartment or the fins in the radiator. The pressure washer just has too much pressure for those applications on old radiators or around electrics.

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spudslite

08-19-2005 09:30:41




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 Re: HF engine cleaning gun in reply to JR in TX, 08-18-2005 11:27:10  
JR ,I use a concentrated degreaser made by Castrol,cost is $6 a gal. Works great and has alot more uses than fuel oils,not mention safer.



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jeffcat

08-19-2005 08:39:22




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 Re: HF engine cleaning gun in reply to JR in TX, 08-18-2005 11:27:10  
OUT SIDE!!!!! Take it out in the middle of the yard and wait for a good wind so everything blows down the road. I clean chainsaws with that rig and is a wonder how old crud just slides off. Liquids burn ---vapor "mist" explodes!
Jeffcat



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SSalzmann

08-19-2005 05:47:35




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 Re: HF engine cleaning gun in reply to JR in TX, 08-18-2005 11:27:10  
Fine vapors of combustible materials are explosive. This includes not only combustible and flammable liquids, but also combustible solids. Grain elevator explosions are a good example of this. Now that you have finely divided combustibles in an oxygen atmosphere all you need is an igniton source. And as we say in the fire safety industry, "Ignition sources are free." Meaning if you are generating the explosive atmosphere, it will find an ignition source. In your case, a spark generated by your air compressor's pressure switch could do the trick.

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JR in TX

08-19-2005 06:37:27




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 Re: HF engine cleaning gun in reply to SSalzmann, 08-19-2005 05:47:35  
So what should I use? What do the makers of these spray guns intend for us to use?? There were no directions or instructions.



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Bernoulli

08-18-2005 17:19:34




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 Re: HF engine cleaning gun in reply to JR in TX, 08-18-2005 11:27:10  
Remember TWA 800? The NTSB concluded that a spark of unknown origin caused the jet fuel (aka kerosene)to explode. The conclusion was that, while on the ground, the air conditioning "packs" that were adjacent to the center fuel tank had caused the small amount of residual fuel to vaporize and create an explosive mixture.



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Slowpoke

08-18-2005 12:43:45




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 Re: HF engine cleaning gun in reply to JR in TX, 08-18-2005 11:27:10  
I did that in a plant one time (and one time only) using kerosene on a very large machine trying to clean a 100' long drive chain of old dirty lube. The mist drifted over to the next two machines (A total of about 40') where people were working and and I started to hear a commotion and yelling about something in the air. About a dozen workers left the work area until the mist was gone. The machines were so large that no one saw me on the other side until their supervisor walked around the end to find out where the mist came from. I immediately appologized (sp) and said it was just an experiment to save time. Needless to say, I went back to the brush and bucket method.

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RustyFarmall

08-18-2005 12:28:30




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 Re: HF engine cleaning gun in reply to JR in TX, 08-18-2005 11:27:10  
Diesel vapor is highly flammable, DO NOT use it unless you want a one way trip to the moon. You would be much better off to use a common detergent and water and then spray some light oil on the clean surfaces when done.



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