How do you bleed the brakes on a Polaris Ranger 4x4?

I'm trying to bleed the brakes on a ranger 4x4. For some reason, it will not build up pressure. Does anybody know what to do with this? Does the engine need to be running in order to build pressure?How do you bleed the brakes on a Polaris Ranger 4x4?you have air in your master cylinder,first bleed master cylinder then balance of system