136
SJ6826RT, SJ6832RT
213560ABA
Section 5 – Procedures
General
5.2-9 Checking the Holding Valve
1.
Raise the platform to an approximate height of
13 ft (4 m).
2.
Locate the emergency lowering valve in the
cutout on the front of the tank side cabinet.
3.
Pull the knob, and hold it. If the platform does
not lower with the knob pulled out, the holding
valves are in good working condition. If however
the platform lowers, the holding valves must be
replaced.
5.2-10 System Pressure Setting
Checking the Pressure
1.
Bring the control box down from the platform to
the ground so it will be accessible while working
5 .2-6 Reconnecting the Platform Control Box
for Use from the Ground .
Refer to the aerial
platform’s serial plate for the correct system
pressure for the unit.
2.
Connect a pressure gauge to the quick
disconnect fitting located on the lift side of the
main manifold in the tank side cabinet.
Pressure gauge
attached to quick
disconnect fitting
System pressure
relief valve
3.
With the engine on, use the control box joystick
to steer fully left or right to produce pressure.
Read the pressure on the gauge.
4.
If the pressure shown on the gauge matches
that on the serial plate, no further action is
needed. However, if it does not match that on
the serial plate, proceed to the next step.
Adjusting the Pressure
1.
Loosen the jam nut (counterclockwise) on the
system pressure relief valve.
2.
Still steering fully left or right to create pressure,
turn the system relief valve adjustment
screw clockwise to raise the pressure, or
counterclockwise the lower the pressure, until it
matches the value given on the serial plate.
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