Terex Genie Z-34/22 IC, Service And Repair Manual

Page: 78 / 156

September 2016 Service and Repair Manual
Manifolds
Part No. 1274592 Z-34/22 IC 65
8-7
Valve Adjustments, 4WD Traction
Manifold
How to Adjust the Charge
Pressure Relief Valve
1 Chock both sides of all four wheels of the
machine.
Note: Be sure the machine cannot move in either
direction.
2 Start the engine from the platform controls.
Slowly move the drive joystick to full stroke in
either direction.
Result: The engine rpm lowers considerably,
as if the engine is under a heavy load, but
does not stall. The charge pressure relief
valve is set correctly. Proceed to step 8.
Result: The engine rpm does not lower
considerably. The charge pressure relief valve
is set too low. Proceed to step 3 to adjust the
charge pressure relief valve.
Result: The engine stalls. The charge
pressure relief valve is set too high. Proceed
to step 3 to adjust the charge pressure relief
valve.
3 Turn the engine off. Connect a 0 to 600 psi /
0 to 40 bar pressure gauge to the test port
located on the traction manifold.
4 Start the engine from the platform controls.
Slowly move the drive joystick to full stroke in
either direction and observe the pressure
reading on the pressure gauge.
Result: When the charge pressure relief valve
is set correctly, the pressure reading on the
gauge should be between 135 to 180 psi / 9 to
12 bar.
5 Turn the engine off. Hold the relief valve and
remove the cap (item B or BD).
6 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Install the relief valve cap.
7 Repeat this procedure beginning with step 2.
8 Remove the wheel chocks.
9 Turn the engine off and remove the pressure
gauge.