August 2018
Part No. 57.4400.9220GT
GTH-2506 GTH-3007
4-41
Section 4 • Repair Procedures
Miscellaneaous
9-1
Parking Brake Reducing Valve
How to Test the Parking Brake
Reducing Valve
1 Connect a 0 to 870 psi / 0 to 60 bar pressure
gauge to test port TP5.
2 Start the engine and let it run at low idle.
3 Engage the parking brake.
Result: the pressure gauge on test port TP5
reads 360 psi / 25 bar.
Pressure is not within specification.
Contact Genie Service Department.