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Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
Part No. 139378
June 2011
Section 4 • Repair Procedures
REV B
7-2
Valve Adjustments -
Function Manifold
How to Adjust the System Relief
Valve
1 Connect a 0 to 5000 psi / 0 to 350 bar pressure
gauge to the test port on the function manifold.
2 Turn the key switch to ground control and pull
out the red Emergency Stop button to the on
position.
3 Move and hold the function enable toggle switch
to either side and move and hold the primary
boom extend/retract toggle switch in the retract
direction with the primary boom fully retracted.
Observe the pressure reading on the pressure
gauge. Refer to Section 2,
Specifications
.
4 Turn the machine off. Hold the system relief
valve with a wrench and remove the cap
(item R).
5 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.
6 Repeat steps 2 and 3 to confirm the relief valve
pressure setting.
How to Adjust the Primary Boom
Down Relief Valve
1 Connect a 0 to 3000 psi / 0 to 200 bar pressure
gauge to the test port on the function manifold.
2 Turn the key switch to ground control and pull
out the red Emergency Stop button to the on
position.
3 Move and hold the function enable toggle switch
to either side and move and hold the primary
boom up/down toggle switch in the down
direction with the primary boom fully lowered.
Observe the pressure reading on the pressure
gauge. Refer to Section 2,
Specifications
.
4 Turn the machine off. Hold the primary down
relief valve with a wrench and remove the cap
(item F).
5 Adjust the internal hex socket. Turn it clockwise
to increase the pressure or counterclockwise to
decrease the pressure. Then install the relief
valve cap.
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
6 Repeat steps 2 and 3 to confirm the relief valve
pressure setting.
MANIFOLDS
Summary of Contents for Z-30/20N
Page 1: ......
Page 148: ...6 46 June2011 Section 6 Schematics 6 45 Power Cable Wiring Diagram...
Page 149: ...6 47 Section 6 Schematics June2011 6 48 Drive Contactor Panel Wiring Diagram...
Page 152: ...6 50 June2011 Section 6 Schematics Manifold and Limit Switch Wiring Diagram 6 49...
Page 153: ...6 51 Section 6 Schematics June2011 6 52 LVI BCI Option Wiring Diagram...
Page 156: ...6 54 June2011 Section 6 Schematics 6 53 Charger Interlock Option...
Page 157: ...6 55 Section 6 Schematics June2011 6 56 CTE Option CE Models...
Page 160: ...6 58 June2011 Section 6 Schematics Hydraulic Schematic 6 57...
