Pressurizing The Pedestal - Vinten 3320 Maintenance Manual

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Pressurizing the pedestal

WARNING!: The Vision Pedestal is fitted with a pressure relief valve as a safeguard
against over-pressurization.
Do not attempt to adjust the pressure relief valve.
Initial pressurization
WARNING!: A pressurized pedestal will rise rapidly when the safety catch is released.
Do not release the safety catch when pedestal is pressurized and balancing load is not
installed. Always restrain the pedestal by hand pressure on the steering ring when the
safety catch is released.
4 To pressurize the pedestal proceed as follows:
4.1 Ensure that bottom clamp
4.2 Slacken top clamp (3).
4.3 Depress the steering ring
under hand restraint. The extent to which the column rises will depend upon the pressure in the
pneumatic system.
4.4 Set the control valve
stroke until a counterbalancing force at least equal to the intended load has been achieved.
WARNING!: A pressurized pedestal will rise rapidly if the control valve is set to WORK.
Do not move the control valve directly from PUMP to WORK
4.5 Set the control valve
equalize between the pump cylinder and tank tube. The tank tube will rise to its full extent during this
time.
4.6 Set the control valve
Fitting a load
5 To fit a load proceed as follows:
5.1 Pressurize the pedestal.
5.2 Depress the top stage to its lowest position and engage the safety latch (2).
5.3 Fit the load securely to the mounting face or to the 100 mm levelling bowl adaptor
appropriate fastenings.
(15) is engaged.
(1) slightly, release the safety latch
(18) to the PUMP position
(18) to the INTERMEDIATE position for 10 seconds to allow the pressure to
(18) to the WORK position.
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(2) and allow the top column to rise
(Fig 2.1) and pump the tank assembly over its full
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(1) using the
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