Hi all!!! Above mentioned machine is giving me a hard time. It keeps pulsing in the braking circuit, approx. 2 times per second. Only while parking brake is off. When parking brake applied, pulsing stops. I blocked the hose from parking brake valve to gearshift valve, expecting some sort of leak downstrem. But no. Pulsing is a bit slower but still goes on. Took apart parking valve and it's pressure regulator. Everything in order. All accumulators checked ok. Except small one on the parking brake line. I taught viola!!! there is the problem. Replaced it, same problem. Is there anybody with intimate knowlege of this system or had a problem like this before? Thanx!!!
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