Genie GTH-636, Service And Repair Manual

Page: 56 / 109

Service and Repair Manual April 2018
Manifolds
46 GTH-636 Part No. 1287209GT
7-4
Valve Adjustments - Secondary
Function Manifold
How to Set the Parki ng Br ake System Pr essure
How to Set the Parking Brake
System Pressure
Note: Be sure that the hydraulic oil level is visible in
the inspection glass of the hydraulic tank.
1 Install a 0 to 1000 psi / 0 to 100 bar pressure
gauge into test port 'TP' at the top of the
primary function manifold, Refer to Primary
Function Manifold Components.
2 Start the engine. Allow the engine to idle after
warming the engine to operating temperature.
3 Without operating any machine controls,
observe the reading on the pressure gauge.
Result: The pressure gauge reads 650 ±20 psi
/ 44.8 ±1.4 bar. The pump is functioning
correctly.
Result: The pressure gauge fails to read 650
±20 psi / 44.8 ±1.4 bar. The pressure setting
needs to be adjusted. Refer to Repair
Procedure, How to Adjust the Function Pump
Pressure .
4 Turn the machine off. Remove the pressure
gauge from the test port.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
5 Install a 0 to 1000 psi / 0 to 100 bar pressure
gauge into test port 'TPB' at the top of the
secondary function manifold, Refer to
Secondary Function Manifold Components.