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Re: Identify Hydraulic Pump & Need Some Help - Super A o

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IH fan

01-27-2013 08:07:32

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Hard white "growth" is aluminum oxide... much the same as rust on ferous metals. I can't say if the cleaner added to it, but it's pretty much normal for old aluminum.
This post was edited by IH fan at 08:08:26 01/27/13.

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01-27-2013 08:24:35

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 Re: Identify Hydraulic Pump & Need Some Help - Super A o in reply to IH fan, 01-27-2013 08:07:32  

The cleaner had to add to it since they had been soaking for 1 week. When I put both pumps in there last weekend they were free from the growth and now they are covered in it. I'll try and get a pic of the other one that is still soaking.
What would be my best bet to get all of the parts clean and free from the hard growth? What about the internal parts with the deposits?

Sounds like I need to clean up the shop and put my sand blast cabinet together that I've had for a few years. lol
This post was edited by RTR at 08:26:08 01/27/13.

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IH fan

01-27-2013 09:43:36

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 Re: Identify Hydraulic Pump & Need Some Help - Super A o in reply to RTR, 01-27-2013 08:24:35  
Any flat internal surfaces, I'd get some real fine grit, 400 or smaller, wet or dry sandpaper. Put it on the flatest surface you can find, and wet sand them back flat and clean. Any other surfaces, you could mask off the flats and carefully blast them, but I'd try to use soda as it will not cut the aluminum, but should do the oxide. This is what they use with aluminum airplane parts when they restore old planes. Sand would be bad and glass beads not quite as bad as sand.

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01-27-2013 10:05:39

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 Re: Identify Hydraulic Pump & Need Some Help - Super A o in reply to IH fan, 01-27-2013 09:43:36  
I do have one of those soda blaster guns from Harbor Frieght, and tried it once on some parts. If I remember correctly, it didn't really do a great job, and made a HUGE mess of dust and soda everywhere. It seemed like it was just "blowing" soda everywhere without any power to clean anything. I'm using an 80 gallon heavy duty oil drive compressor that fills up to 175 psi and shuts off.
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01-27-2013 13:39:21

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 Re: Identify Hydraulic Pump & Need Some Help - Super A o in reply to RTR, 01-27-2013 10:05:39  
Yep. Tried the soda blaster again with the big compressor. Just blew soda everywhere with out really cleaning anything. This is a cub hyd pump I just blasted. You can see the paint, dirt and grease still on it. I flaked off the clump of dirt with a screwdriver and he blaster wouldn't even do it.
This post was edited by RTR at 14:01:11 01/27/13.

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