if your motor is a p38 as mine is the compressor is knockin its pan in just keeping the suspension going,wagons ect usually have an engine driven compressor+3 or 4 air tanks. i used to drive mobile cranes before i retired they all had an airline on em valve block on side of chassis to keep tyres up to pressure but they were BIG compressors but i dont think they would run air tools for long no enough f a d ,pressure was ok though not enough capacity/volume,,the electric compressor on a p38 selfdestruct with an air bag leak if left to long,,,,,,,,,,,dave,,,of to kip now gnight