Genie S-60 Service Manual page 252

Third Edition • First Printing
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 207 bar) pressure
gauge to the diagnostic nipple (item 24) on the
function manifold.
2 Start the engine from the ground controls.
3 Hold the function enable switch to either side
and hold the boom extend toggle switch with
the boom fully extended. Observe the pressure
reading on the pressure gauge.
Boom extend relief valve specifications
Pressure
4 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap
(item 5, 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
specified.
6 Repeat steps 2 through 5 to confirm relief valve
pressure.
Part No. 65196
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,
extend/retract 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 11-1, Function Manifold, in this section.
1 Push the button on the end of the valve in
¼ inch (6 mm).
2500 psi
172 bar
2 Hold the function enable switch to either side
and move the ground control toggle switch for
the function being overridden to operate the
function.
Genie S-60 & Genie S-65
Section 7 • Repair Procedures
MANIFOLDS
Collision hazard. Impact with
moving boom components could
result in death or serious injury.
Use extreme caution when
overriding a machine function.
Identify the direction of machine
movement before overriding a
valve.
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