Vinten OB Quattro, Operator'S Manual

Page: 14 / 25

14
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 (6) over its full travel at least twice, then position the column
in the mid-height position.
If the column tends to fall, remove a trim weight (1)(9) 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) .
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.
WARNING! A pressure retaining valve prevents pedestal pressure being
reduced below approximately 3.5 bar (50 psi)
WARNING! The Schrader valve cap (16) forms a primary pressure seal.
Always replace the cap and screw it down finger- tight.