Terex Genie Z-135/70, Service And Repair Manual

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October 2018 Service and Repair Manual
Manifolds
Part No. 1268557GT Z®-135 /70 129
4 Simultaneously push and hold the auxiliary
power button and the primary boom retract
button with the primary boom fully retracted.
Observe the pressure reading on the pressure
gauge. Refer to Specifications,
Hydraulic
Component Specification .
5 Hold the relief valve stem with a hex wrench
and loosen the lock nut.
6 Adjust the valve stem. Turn it clockwise to
increase the pressure. Tighten the lock nut.
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
7 Repeat step 4 to confirm relief valve pressure.
8 Remove the pressure gauge.
How t o Adj ust t he Pri mar y Boom Extend R elief Val ve
How to Adjust the Primary Boom
Extend Relief Valve
Note: Perform this procedure with the axles
extended.
1 Remove the primary boom end cover from the
pivot end of the boom.
2 Locate the primary boom extend limit switch on
the side of the primary boom.
3 Follow the wiring from the switch to the pivot
end of the primary boom. Locate and
disconnect the wire connector for the primary
boom extend limit switch.
Note: The correct wire connector will be a 2 pin
connector with a yellow marker on the cable.
4 Start the engine and fully extend the primary
boom. Turn the engine off.
5 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the ptest port on the
function manifold.
6 Start the engine from the ground controls and
press and release the rpm select button until
the engine changes to high idle.