18
Operation
Height adjustment
!
Lower stage pressure-assistance is provided by a
gas strut located within the column.
The strut is available in three pressure settings (See
below) and the correct one should be installed according
to the pedestal load. (See Replacing gas struts on
page 26).
Lower stage
The elevation tube (5) forms
the lower stage of the pedestal
height adjustment and has a
range of 395 mm (15.5 in.),
and is pressure-assisted to aid
elevation whilst the pedestal
is loaded. To adjust the height
setting:
1. Lower the top stage and
engage the top clamp (19).
2. Support the weight of the load
by holding the steering ring (4)
and then slacken the bottom
clamp (18) by turning the
red knob counter-clockwise
until the lower stage is free to
move.
3. Use the steering ring to set the column at the required height and
re-tighten the bottom clamp (18).
Strut Payload / Force Part No.
Factory Fitted 30-55 kgs / 450N 3328--305
Supplied loose 55-70 kgs / 600N 3328-385
Available to purchase 0-30kgs / 270N 3328-307
19
18
5
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