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24
Place a trim weight
(28)
onto the weight tray
(25)
.
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 and extend the column using the
steering ring
(3)
under hand restraint.
If the column tends to fall, remove a trim weight
(28)
from the weight tray
(25)
.
If the column rises, use the Schrader valve cap
(1)
to carefully reduce the pressure in steps
of 0.15- 0.20 bar (2-3 psi) until the payload is correctly balanced. A correctly pressurized
pedestal will balance its payload such that it may be moved to any position over the full on-
shot stroke with minimum effort, and will maintain its position when the steering ring is re-
leased.
The pedestal is now ready for use.
Using the pedestal
Height adjustment
The column has an on-shot stroke of 54 cm (21.3 in.) and the load can be moved over this dis-
tance, in perfect balance, by raising and lowering the steering ring
(3)
.
Column movement can be damped as required, by setting the drag control knob
(6)
located at the
top of the fixed column
(21)
. Turn the knob
(6)
clockwise to increase the drag setting, and counter-
clockwise to decease it.
If fixed height operation is required, turn the knob fully clockwise to lock the moving column in po-
sition.
Brakes
The skid is fitted with a brake on each wheel. The brakes are applied by pressing down on the
lever
(15)
situated above the wheel and released by pressing down on the centre ‘pop-up’ lever
which is raised when the brake is on.
NOTE:
To remove a trim weight
(28)
from the trim weight stowage
(22)
, first rotate the
trim weight catch
(23)
through half a turn anti-clockwise.
Replace the trim weight catch
(23)
afterwards to retain remaining stowed trim
weights
(22)
.
WARNING! Do NOT lean over the pedestal when releasing the safety catch.
An over pressurized pedestal may rise rapidly when the safety
catch is released, causing personal injury.
NOTE:
The Schrader valve cap
(1)
forms a primary pressure seal. Always replace the
cap and screw it down finger-tight.