steering oil
S-cam brakes.
the wall thickness of steel hydraulic brakes pipes most commonly fittes on cars are approximately?
Most manual transmissions are splash lubricated.Most manual transmissions are splash lubricated.
Most commonly would be lack of freon.
Most common turbochargers (bearings) are lubricated and cooled with engine oil.
Probably most of the refrigerant has escaped or the compressor has seized. Mechanical things like this need to be run periodically to keep them properly lubricated. because of the amount of muffins you have in it mr greedy.
If it is an oil lubricated compressor (which most vertical/uprights are, only a few are oil-free). Not only can it NOT be used horizontally, it cannot be transported horizonatally with oil in the crankcase. Oil will seep out of the crankcase, past piston ring, and into the pump causing hyraulic lock.
Most commonly, the system is low on freon.
The most common brakes on a tractor trailer are the s-cam brakes
When the equipment manufacturer recommends it.
The compressor has moving parts internally which need to be lubricated. Like an engine, most AC compressors use a system with pistons. Without PAG oil, you'd have metal-on-metal contact, and the pistons would end up seizing.
A reciprocating compressor is one in which a piston or diaphragm moves in a reciprocating motion. The compressor used in the AC system of a Saturn is NOT a reciprocating compressor. It is most likely a "rotary vane" compressor.