Valve Adjustments, 2Wd Traction Manifold - Genie Z-80/60 Service And Repair Manual

Service and Repair Manual
Manifolds
8-11
Valve Adjustments, 2WD Traction
Manifold
How to Adjust the Charge
Pressure Relief Valve
Note: Refer to 2WD Traction Manifold Component
list to locate the charge pressure relief valve.
Note: Perform this procedure with the hydraulic oil
temperature at 100°F to 150°F / 38°C to 65.5°C.
Note: This will take two people to perform this
procedure.
1 Connect a 0 to 600 psi / 0 to 50 bar pressure
gauge to the test port on the drive pump.
2 Start the engine from the ground controls.
3 Press the function enable/high rpm select
button (rabbit symbol) position. Note the
reading on the pressure gauge.
4 Turn the engine off.
5 Remove the pressure gauge from the drive
pump. Connect the gauge to the test port
located on the drive manifold.
6 Use a wrench to hold the charge pressure
relief valve and remove the cap.
7 Start the engine from the platform controls.
108
8 Move rpm select switch to high rpm (rabbit
symbol).
9 Begin driving the machine forward at a
medium speed while one person monitors the
pressure gauge. Continue driving until the
pressure stabilizes.
Note: The pressure reading should be
approximately 40 psi / 2.8 bar less than the
pressure reading taken in step 3.
10 If it is not, stop the machine and adjust the
internal hex socket on the pressure relief valve
either up or down.Turn it clockwise to increase
the pressure or counterclockwise to decrease
the pressure.
11 Drive the machine forward and check the
pressure.
12 Continue making small adjustments until the
pressure reading on the gauge is
approximately 40 psi / 2.8 bar less than the
pressure reading taken in step 3.
13 Turn the engine off and remove the pressure
gauge.
September 2016
Part No. 1268556