Terex Genie Z-45/25 Bi-Energy, Service And Repair Manual

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Service and Repair Manual July 2021
Manifolds
62 Z ® -45/25 • Z ® -45/25J Part No. 1312350GT
8-2 Valve Adjustments - Function
Manifold
How to Adju st th e Syste m Relie f Valve How to Adjust the System Relief
Valve
Note: Perform this procedure with the boom in the
stowed position.
Note: Refer to Function Manifold Component list to
locate the system relief valve.
1 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the test1 port on the
function manifold.
2 Start the engine from the ground controls.
3 Hold the function enable switch to the high
rpm position and activate and hold the
primary boom retract switch with the boom
fully retracted.
4 Observe the pressure reading on the pressure
gauge. Refer to Specifications,
Hydraulic
Specifications .
5 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap.
6 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Install the relief valve cap.
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
7 Repeat steps 2 through 5 and recheck relief
valve pressure.
8 Remove the pressure gauge.
How to Adju st th e Seco nda ry Boo m Dow n Relief Valve How to Adjust the Secondary
Boom Down Relief Valve
Note: Perform this procedure with the boom in the
stowed position.
Note: Refer to Function Manifold Component list to
locate the secondary boom down relief valve.
1 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the test1 port on the
function manifold.
2 Start the engine from the ground controls.
3 Hold the function enable switch to the high
rpm position and activate and hold the
secondary boom down switch with the
secondary boom fully lowered.
4 Observe the pressure reading on the pressure
gauge. Refer to Specifications,
Hydraulic
Specifications
.
5 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap.
6 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Install the relief valve cap.
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
7 Repeat steps 2 through 5 and recheck relief
valve pressure.
8 Remove the pressure gauge.