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One last question on the subject...the inside of the air chamber has a chamfer/groove in it, and the TM specifies "orient it above half way," meaning anywhere you want between 9-10-----2-3 o'clock position. What is the significance of this groove and orientation? Lubrication was my first...

Thanks to NDT. I disassembled the brand new pump, air chamber was so new and tight that it wouldn't slide back and forth. Forced the issue manually a few times and reassembled, bech tested, worked like a charm. Put on truck....success. So new and so quiet...you couldn't even hear the pitter...

If it means anything, hand pump won't lift the cab either.

Can you recall any specific issues when changing out your air over hydraulic pump with priming the system and/or getting all the air out? If I recall correctly, you had to take off and replace the pump a few times and I don't recall if it was clear what the difference was between the two pumps...

If anyone needs it, I have a spare unit and a set of seals to go with it....will post in classifieds section as well.

this is long way around upload a picture, which is kicking me out of SS each time I try....nothing for sale, just click on the below link to see the picture with an arrow pointing to the port in question. http://baltimore.craigslist.org/wan/5904108075.html Thanks again.

A few quick questions for those who have already rebuilt their air over hydraulic pumps...I bought a used unit, arrived complete, and immediately took it apart with the intention of rebuilding one unit, swapping it out for the unit currently on the truck, and not having to worry about the...

MROsupply online ordering is working just fine right now, website is a little buggy with the minimum order number of each item and not matching up with what you want. I ended up ordering double the amount of everything I needed, totaling $101, about 10 days from order to delivery. Now I have...