Hi All
I have problem parking brake low pressure on 777D prefiks FKR.
Pump pressure sometimes OK 700 Psi,but sometimes low pressure 150 Psi at low idle.
If high idle speed the pressure already good 700Psi but unstable.
I'm already plug output control valve parking brake to parking brake system, lock up supply, pilot and supply diverter towing valve but pump pressure still low.
also already replace Pump Gp and valve parking with new but pressure still low.
please share and give me an advice yours experience.
Thanks
I have problem parking brake low pressure on 777D prefiks FKR.
Pump pressure sometimes OK 700 Psi,but sometimes low pressure 150 Psi at low idle.
If high idle speed the pressure already good 700Psi but unstable.
I'm already plug output control valve parking brake to parking brake system, lock up supply, pilot and supply diverter towing valve but pump pressure still low.
also already replace Pump Gp and valve parking with new but pressure still low.
please share and give me an advice yours experience.
Thanks