Balancing The Load - Vinten Quattro SL Operating Instructions Manual

Pull the hose (P.4) out of its stowage (P.2). Connect the hose to the pedestal charging valve (16).
On the pedestal, push down on the weight tray (1) against residual pressure. At the safety catches
(3), push the rocker switches to the unlocked position.
Position the pump between the legs, standing with both feet on the fold-down feet (P.3).
Grip the handle (P.1) with both hands and, using full steady strokes, pressurize the pedestal to the
required pressure. Do not exceed the maximum working pressure, indicated by the leading edge
of the red sector on the gauge (7). Approximately 600 strokes will be required to fully charge the
pedestal.
Disconnect the hose (P.4) from the pedestal charging valve, but do not refit the Schrader valve cap
at this stage. Fit the hose in its stowage (P.2).
Push the pump plunger fully down, push in the handle release button (P.5) and move the handle
(P.1) to the vertical position, where it will lock the pump plunger in the closed position.
Fold up both the feet (P.3).

Balancing the load

After pressurization of the pedestal, the pan and tilt head and payload can be accurately balanced, as
follows:
Exercise the moving column (5) over its full travel at least twice, then position the column in the
mid-height position.
WARNING!
If the column tends to fall, remove a trim weight (2, 19) or increase pressure.
If the column tends to rise, reduce the pressure in steps of 0.15-0.20 bar (2-3 psi) using the
Schrader valve cap (16).
WARNING!
Refit the Schrader valve cap (16).
A correctly pressurized pedestal will balance its payload such that it can be moved to any position
over the full on-shot stroke of the moving column, with minimum effort, and it will maintain its
position when the steering ring is released.
Fine balance and temperature correction may be achieved by adding or removing trim weights.
A pressure retaining valve prevents pedestal pressure being reduced
below approximately 3.5 bar (50 psi).
The Schrader valve cap (16) forms a primary pressure seal. Always replace
the cap and screw it down finger- tight.
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