Genie S-80 Service Manual page 191

Section 7 - Repair Procedures
FUNCTION MANIFOLDS
How to Adjust the Boom Extend
Relief Valve
Perform this procedure with the boom in the
stowed position.
1 Connect a 0 to 3000 psi (0 to 206 bar) pressure
gauge to the test port (item 23) on the function
manifold.
2 Start the engine from the ground controls.
3 Hold the extend switch with the boom fully
extended, and observe the pressure reading on
the pressure gauge.
4 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap (item 13,
function manifold).
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 valves higher than
recommended.
6 Restart the engine. Hold the extend switch with
the boom fully extended, and recheck the valve
pressure.
Boom extend relief valve specifications
Pressure
7 - 38
How to Override a Valve
A hydraulic valve may need to be manually
overridden to troubleshoot a malfunction. The
proportional boom functions (boom up/down and
turntable rotate) use a variable position
proportional valve and a three position directional
valve. Example: one position for boom up, one
position for neutral and one position for boom
down. The platform rotate function uses a three
position valve. The platform level uses a three
position and a two position valve. The three
position valves and the proportional valves can be
manually overridden. To identify the manifold
valves see 10-1, Function Manifold, in this section.
1 Push the button on the end of the valve in
¼ inch (6 mm).
2 Move the ground control function switch for the
function being overridden to operate function.
1950 psi
Collision hazard. Impact with moving boom
134 bar
Genie S-80 & Genie S-85
Service Manual - First Edition
components may cause death or
serious injury. Use extreme
caution when overriding a
machine function. Identify the
direction of machine movement
before overriding a valve.
Part No. 34032