35
Column and ram
5
To remove the column proceed as follows:
5.1
Remove any load from the head mounting platform.
5.2
Remove the steering assembly
5.3
remove four screws (6) and remove the weight tray assembly complete.
5.4
Connect nitrogen charging equipment to charging point and completely depressurize pedestal.
5.5
Lay the pedestal on its side.
5.6
slacken the four screws (10) at each end of the manifold (4) to allow the 'O'
ring seal (8) to unseat and any residual pressure in the tank to exhaust. Remove screws (10) and
washers (9).
5.7
Withdraw the first stage piston (5) and the manifold (4) together from the bore of the first stage
cylinder.
5.8
Close the column to its lowest position.
5.9
Slacken two screws (17) and remove the cords (21) from cord clamps (19). Note the
arrangement of the cord in the clamp. Withdraw the cords from the bushes (20) and tie the ends
together.
5.10 Stand the pedestal on its wheels.
remove six screws (25) securing the fixed tube assembly to the tank and lift
off the column and ram assembly complete.
6
To dismantle the column proceed as follows:
6.1
remove circlip (26) from the first stage cylinder (6) to release it from the ram
plate (31).
6.2
Remove eight screws (32), separate the first stage ram plate (31) from the column bottom tube
(33).
6.3
Withdraw the second stage cylinder (4), the first stage cylinder (6) and associated parts from the
second stage ram plate (34).
6.4
Temporarily refit the first stage ram plate to the bottom tube.
6.5
remove four screws (16) which secure each of the adjustable cord anchor
assemblies (26-31) and withdraw the assemblies from the column.
NOTE:
It is not necessary to remove the column assembly from the pedestal or to dismantle the
column for access to the ram assembly.
