Hey all,
I have a similar issue.
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Bought a M9889a1 in GREAT condition on Craigslist. Paid a tow semi to get it home. Now I'd like to move it across the yard and am having trouble. I know nothing 'bout air-brakes other than internet reading....
I didn't want to mess with caging the brakes, so I jury-rigged an air compressor splitter to pressurize Service & Emergency air lines from a regular garage air compressor. Got everything up to 120psi on the compressor, but couldn't budge it with a Durango. I gotta be missing something, eh? Durango should tow it empty on pavement. I dont' need to cage the air brakes when both systems are pressurized, correct?