Service and Repair Manual
October 2018
Manifolds
128
Z®-135
/70
Part No. 1268557GT
8-3
Valve Adjustments -
Function Manifold
How to Adjust the System Relief
Valve (before serial number 440)
Note: Perform this procedure with the boom in the
stowed position.
Note: Auxiliary power will be used to perform this
procedure. Do not start the engine.
Note: Refer to Function Manifold Component list to
locate the system relief valve.
1
Hold the relief valve stem with a hex wrench
and remove the cap.
2
Turn the internal hex socket counterclockwise
several turns. Do not allow the relief valve to
come apart. Install the relief cap.
3
Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the test port on the function
manifold
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 remove the cap.
6
Adjust the internal hex socket. Turn it
clockwise to increase the pressure. Install the
relief cap.
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 System Reli ef Val ve
How to Adjust the System Relief
Valve (after serial number 439)
Note: Perform this procedure with the boom in the
stowed position.
Note: Auxiliary power will be used to perform this
procedure. Do not start the engine.
Note: Refer to Function Manifold Component list to
locate the system relief valve.
1
Hold the relief valve stem with a hex wrench
and loosen the lock nut.
2
Turn the valve stem counterclockwise several
turns. Do not allow the relief valve to come
apart. Tighten the lock nut.
3
Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the test port on the function
manifold
Summary of Contents for Genie Z-135/70
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Page 37: ...October 2018 Service and Repair Manual Specifications Part No 1268557GT Z 135 70 23 T ...
Page 135: ...October 2018 Service and Repair Manual Manifolds Part No 1268557GT Z 135 70 121 ...
Page 137: ...October 2018 Service and Repair Manual Manifolds Part No 1268557GT Z 135 70 123 ...
Page 139: ...October 2018 Service and Repair Manual Manifolds Part No 1268557GT Z 135 70 125 ...
Page 141: ...October 2018 Service and Repair Manual Manifolds Part No 1268557GT Z 135 70 127 ...
Page 147: ...October 2018 Service and Repair Manual Manifolds Part No 1268557GT Z 135 70 133 ...
Page 153: ...October 2018 Service and Repair Manual Manifolds Part No 1268557GT Z 135 70 139 ...
Page 155: ...October 2018 Service and Repair Manual Manifolds Part No 1268557GT Z 135 70 141 ...
Page 159: ...October 2018 Service and Repair Manual Manifolds Part No 1268557GT Z 135 70 145 ...
Page 161: ...October 2018 Service and Repair Manual Manifolds Part No 1268557GT Z 135 70 147 ...
Page 233: ...October 2018 Service and Repair Manual 219 Generator Wiring Schematic ...
Page 236: ...Service and Repair Manual October 2018 222 Hydraulic Generator Welder Option ...
Page 242: ...Service and Repair Manual October 2018 228 Hydraulic Schematic from serial number 535 ...
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