Everything here is from the references shown below, with a few comments in an alternate color.
BCU or brake hydraulic control failures.
EXCEEDING 600 PSI INDICATED BRAKE PRESSURE MAY CAUSE SKIDDING TIRES AND AT HIGH GROUNDSPEEDS WILL RESULT IN TIRE FAILURE.
Because each hydraulic system has independent accumulators, the Parking Brake pressure will reflect the respective accumulator pressure; however, the outboard brake pressure, if available, will approximately match the same value as the inboard brake pressure.
Tires skidding at less than or equal to 20 knots groundspeed will not cause significant tire damage.
(1) PARKING BRAKE Handle . . . Pull to maximum brake pressure.
Gulfstream GVII-G500 Airplane Flight Manual, Revision 4, August 29, 2019
Gulfstream GVII-G500 Production Aircraft Systems, Revision 3, July 15, 2019
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