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NC Wayne
11-04-2005 16:03:35
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Re: Cleaning precision parts in reply to K.B.-826, 11-03-2005 19:48:11
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If I'm rebuilding a hydraulic valve, pump, etc I always use brake cleaner to wash the parts. It evaporates almost instantly leaving the part clean so you don't need a lint free cloth to dry it off. As far as blowing the part off the worst thing about that is the posibility of blowing it out of your hand and letting it hit the ground. Not only does it get dirty but you alos stand the chance of it getting scratched, dimpled, etc when it hits. Beyond that hazard I've never seen any problem with using compressed air even if it has a little moisture in it, especially if your planning to put the part right back on the machine and back to work. Now if you were building the part as a spare and it was gonna set on a shelf for a time, then I'd say watch out for the moisture because it's gonna stay on the part liong enough to cause rust, otherwise I wouldn't worry about it... Like Doogdoog basically said, when your working on equipment in the field, like I do, you might as well throw the cleanliness guidelines in the OEM manuals out the window because you'll never reach the level of cleanliness they want you to. Heck short of having a "computer style" clean room with submicron filtered air, etc you'll never reach the levels they say you should. I've been in numerous rebuild shops over the years that do engines, fuel pumps, injectors, etc and I've never seen one with a "clean room" for doing the work. True most have a room that's kept clean, that's well lit, that usually has formica on the benches, etc, and is often closed off from the dirtier parts of the shop with a plastic curtain or whatever, but none with nearly the cleanliness levels the OEM suggests. The shop I just described sounds very similar to the company that rebuilds fuel pumps for us. Since dad first started using them it's been nearly 20 years and we've never been called back on any of the pumps or injectors they've done for us. In the end, especially if you work in the field, all you can do is keep everything as clean as possible and keep on working, otherwise the time to take the machine to the shop, rebuild the part in a clean room, etc will be so cost prohibitive you'd be better off to scrap the old part and simply buy a new one.....which is exactly what most OEM's nowdays want you to do anyway....Just my .02
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