41
11.3 Referring to
, assemble first stage piston, fit new 'O' ring seal (24) and secure to manifold
(25) with three screws (23). Do not tighten screws at this stage.
11.4 Referring to
, install assembled piston and manifold to tank, ensuring that a new 'O' ring
seal (8) is fitted and secure with eight screws (10) and washers (9). Do not tighten screws at this stage.
11.5 Connect nitrogen supply to the charging point on the pedestal. A recommended charging kit for
this pedestal is the charging valve assembly, Vinten Part No. 3702-32. Note that this piece of equipment
is NOT a pressure reducing valve.
11.6 Apply nitrogen pressure slowly and use only sufficient to cause the column to extend to its full
extent. Do not exceed 50psi (3.45bar). Maintain tension in cords as column extends.
11.7 When column is fully extended pull cords taut, secure ends of cords as noted in
and
secure using clamp (19) and screw (17).
11.8 Referring to
, tighten nuts (30) on chain adjusters (28) to remove all perceptible slack from
chains and lock with locknuts (29).
11.9 Return pedestal to upright position.
, use a screwdriver to turn cord adjusters (27) clockwise to take up slack in
cords and lock adjustment by tightening nuts (30).
, place cover (15) on column. Do not insert screws (16) at this stage.
, install cover (17) and insert four screws (17). Do not tighten screws at this
stage.
, install weight tray assembly and secure with four screws (6). Do not tighten
screws at this stage.
11.14 Slightly tilt pedestal using a wooden block under one wheel bracket to give access to screws in
manifold.
11.15 Place a mass of about 11 kg (24 lb) on the weight tray and fully compress the column to
centralize the ram components.
, tighten screws in manifold commencing with the three screws holding the
ram to the manifold (7), followed by the eight screws holding the manifold to the tank (10).
11.17 Exercise the column by raising and lowering to full extent at least twice, ensuring that smooth
action is available over the complete range.
11.18 If sticking is noted slacken off then retighten screws in manifold. Repeat until smooth action is
available over the complete range.
11.19 Allow column to rise to its full extent and remove mass from weight tray.
WARNING!: This pedestal must be charged only with clean dry air or nitrogen. A
pressure reducing valve must be fitted to the pressure line between the nitrogen
cylinder and the outlet connection of the hose. The reducing valve must be screwed
into the nitrogen cylinder outlet. The maximum pressure on the outlet side of the
reducing valve when charging this pedestal must not exceed 280psi (19.31bar)
