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There is a check valve between the tank and the compressor, and the compressor has valves of its own. I can't see why it should be cycling, unless it is leaking. If the leak was in the secondary systems, you would see the tank pressure gauge rise and fall as the compressor cycled... You...

That's just it, the compressor is on so little of the time, that what you are likely to see after air up is done, is the compressor just idling along. If your compressor is cycling, and you aren't pressing the brakes, or running the wipers, you have a leak that needs attention. Check that your...

The belt specs are in the -20 TM. The -10 tells you to look for frayed or missing belts. The proper spec is 3/4 inch deflection, pressing with a ruler, using a finger grip on the ruler. I prefer using my thumb and eyeballing the deflection, as I always have those instruments at hand. -Chuck...

An interesting thing about the front main bearing on virtually every car or truck engine: It is under a great deal of stress and wears more quickly than any other bearing in the engine. The reason it is under such stress is the belt load. When you start the engine, it is already pulled...

Sounds normal to me. The compressor is anything but a steady load. That means the pulling side of the belt is pulling harder and less hard as the compressor goes through a compression stroke. That causes the belt to rise and fall ever so slightly in the V groove in the pulley, and that will...