Genie Z80/60 Service Manual page 171

June 2011
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2
REV E REV D
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2
5 Place a 4 x 4 inch / 10 x 10 cm block on the
primary boom rest pad. Lower the primary
boom onto the block.
Crushing hazard. Keep hands
clear of the block when lowering
the primary boom.
6 Simultaneously push and hold the function
enable/high speed button and the primary boom
down button. Observe the pressure reading on
the pressure gauge. Refer to Section 2,
Specifications.
7 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap (item E).
8 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.
9 Start the engine and repeat steps 6 through 8 to
confirm the relief valve pressure.
10 Start the engine and raise the primary boom
approximately 12 inches / 30 cm. Remove the
block and lower the primary boom to the
stowed position.
11 Turn the engine off and remove the pressure
gauge.
Part No. 88619
How to Adjust the Primary Boom
Extend Relief Valve
1 Connect a 0 to 5000 psi / 0 to 350 bar pressure
gauge to the LS port on the function manifold.
2 Start the engine from the ground controls.
3 Raise the boom to a horizontal position. Turn
the engine off.
4 Locate the boom extended limit switch
(LSP1EO) on the outside of the primary boom.
5 Remove the limit switch mounting bracket
retaining fasteners.
6 Pull the limit switch and bracket assembly out of
the boom tube and let it hang down.
7 Start the engine from the ground controls and
press and release the rpm select button until
the engine changes to high idle.
8 Simultaneously push and hold the function
enable/high speed button and the primary boom
extend button with the primary boom fully
extended. Observe the reading on the pressure
gauge. Refer to Section 2, Specifications.
9 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap (item U).
Z-80/60
Section 4 • Repair Procedures
MANIFOLDS
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