Terex Genie Z-60 DC, Service Manual

Page: 62 / 193

Service and Repair Manual August 2022
Manifolds
50 Z ® -60 DC • Z ® -60 FE Part No. 1307785GT
How to Adju st th e Prim ary Bo om Ext end R elief Valv e How to Adjust the Primary Boom
Extend Relief Valve
Note: Perform this procedure with the machine in
the stowed position.
1 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to test port #1 (TP1) on the
function manifold.
2 Raise the primary boom to a horizontal
position.
3 Locate and remove the solenoid operated
proportional valve coil. Refer to Repair
Procedures,
Function Manifold Components
.
4 Press and hold the function enable button.
Activate and hold the primary boom extend
switch with the boom fully extended.
5 Observe the pressure reading on the pressure
gauge. Refer to Specifications,
Hydraulic
Component Specifications
.
6 Locate and remove the cap from the primary
boom extend relief valve. Refer to Repair
Procedures,
Function Manifold Components.
7 Remove the pressure gauge.
8 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Install the relief valve cap.
9 Repeat this procedure beginning with step
4 to confirm the relief valve pressure.
10 Reinstall the proportional valve coil.
11 Remove the pressure gauge.