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19
To determine the pedestal pressure, proceed as follows:
Ensure that the control valve
(26)
is set to the WORK position (refer to
Setting the control
valve
on page 16).
Rotate the steering ring
(3)
so that the pressure gauge is visible through the viewing window
(2)
.
Pressurizing the pedestal using the built-in pump
To pressurize the pedestal using the built-in pump, proceed as follows:
Apply the wheel brakes
(15)
.
Set the control valve
(26)
to the PUMP position as follows:
Depress the control valve
(26)
against the spring force, and rotate the lever fully
clockwise to a horizontal position. The control valve
(26)
will remain in a depressed
position.
Push down on the steering ring
(3)
against any residual pressure and release the safety
catch
(24)
. Set the safety catch in the horizontal position.
Rotate the steering ring
(3)
so that the pressure gauge
(2)
is visible through the window.
Using the steering ring
(3)
, raise the top stage
(5)
until fully extended. Commence pumping
by lowering and raising the top stage
(5)
over the upper half of its travel. When the pressure
gauge
(2)
begins to register, pump the top stage over its full stroke.
As pressure increases, put a foot on the skid to restrain the pedestal on the up stroke.
Stop pumping when the required pressure is reached
(Fig 3)
during the pumping stroke. Do
not exceed the maximum working pressure, indicated by the leading edge of the red sector
on the gauge
(2)
.
WARNING! If fitted, remove the camera from the pan and tilt head before
attempting to use the built-in pump. The pan and tilt head can
remain fitted without compromising operator safety.
NOTE:
The pressure gauge only displays full system pressure when the control valve
(26)
is
set to WORK.
An approximation of the final pedestal pressure can obtained by observing the
peak pressure reading on the downward pumping stoke.
NOTE:
Do not exceed 3.5 bar (50 psi) if the pan and tilt head has yet to be fitted. For
further information refer to
Fitting and balancing the load
on page 22.