" Compressor not making air" unit was running great. stopped making air I -anticipate something is slipping on the drive shaft. a coupler or spline bearing. it will be too long for me to fix I would anticipate five hours just to get to the driveshaft . could be a good find if you are mechanical. The old diesel engine runs great with 3400 hours on the clock. paid 3500 for the unit. starts up right away all gauges work full of diesel just needs compressor fixed as it won't load up pressure. all fluids and filters just change offers on 2000 thx