Great thread!

these guys run insane duty cycles on their sanden pumps at 3000 rpm so they have done whatever they can to make these pumps last yet keep oil and water from filling their tanks.

you completely disassemble the pump, clean all of the old oil out, there are a couple holes you have to seal to isolate the two halves, vent the crank case pack everything with grease: cylinder walls etc. (a nice high temp high performance grease), re assemble making sure everything goes back the way it came out, voila!

the tread starter accidentally put a check valve in backwards and blew a chunk out of his compressor sending if flying into the radiator or something like that.


but he's been using his for 3 years and its still running strong.
 
Ok, I have been in and around vehicle mechanics for a while now. I've rebuilt engines and pretty much everything else 'cept rear ends and trannys, what is this sanden pump and what does it do?

It is the air conditioner compressor. It has and is being used as an air compressor. Some on here have converted them to run air tools and pump up tires. There is someone I think from VA that converted his and has an air tool oiler inline on the intake. A whole lot easyer and less work.
 
these guys run insane duty cycles on their sanden pumps at 3000 rpm so they have done whatever they can to make these pumps last yet keep oil and water from filling their tanks.

you completely disassemble the pump, clean all of the old oil out, there are a couple holes you have to seal to isolate the two halves, vent the crank case pack everything with grease: cylinder walls etc. (a nice high temp high performance grease), re assemble making sure everything goes back the way it came out, voila!

the tread starter accidentally put a check valve in backwards and blew a chunk out of his compressor sending if flying into the radiator or something like that.


but he's been using his for 3 years and its still running strong.

Why would the compressor put oil/water into the tanks?
 
oil from the oiler, some people just pull the plug off the top and dump a cap full of gear oil in every once in a while.

and all compressors normally run a water seperator. not sure why compressors do that...i can't think yet.



i have an inline oiler on mine and if i rev the engine too high i will burn up the pump.

already burned one up.

my current one i've been careful with and its lasted me almost 4 years but i would like to rev the engine higher, make the air tools more effective and filling tires more efficient.

initial tear down pics courtesy of flgatorsrule
IMG_7242.jpg


all clean
IMG_7248.jpg


greased up
IMG_7254.jpg


IMG_7260.jpg


IMG_7263.jpg


and back together
IMG_7266.jpg







this is a 7 piston pump but i believe most ours are 5 piston pumps

truck022.jpg


truck028.jpg
 
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The one that mounts with bolts facing down looks like the one on xj's from 91 and up. The one that has the bolts ruining parallel to the pump looks like the xj pump form the 90 and older xj's.
 
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