I think I got it with some helpfull info from the factory. This machine has the group 30 brake system. The hydraulic portion of the brake booster/master cyl is powered by a small aux pump on the right side of the engine. The specs state rated pressure of 3500 psi. With engine running I'm getting 1500 psi. There's no adjustment and the lines run directly to the booster so I'm thinking it's not enough pressure to run the booster so I ordered a new pump.
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