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4.18 Apply short pieces of adhesive tape or similar non-abrasive marking to tank top plate and tank
tube to indicate orientation for assembly.
4.19 Remove four countersunk socket head screws (43) from the tank top plate (48) and remove tank
tube. Remove and discard 'O' rings (46) and (47) from the tank top plate.
Elevation tube
5
To remove the elevation tube (
):
5.1
Separate the telescopic column from the skid (
5.2
Remove the tank assembly from the elevation tube (
).
5.3
Remove grub screw (9) and guide pin (8) from below the bottom clamp on the outer tube.
5.4
Lay the outer tube on a horizontal surface with the bottom clamp downwards.
5.5
Withdraw the elevation tube until it is clear of the outer tube.
5.6
Remove clamp (1) and shims (2) from inside the top of the outer tube.
6
To dismantle the elevation tube (
):
6.1
Push out the Spirol pin (3) from inside the tube with the short leg of a small Allen key until it is
free of the tube.
6.2
Remove the tank tube clamp assembly (2), by pivoting the free end about the retaining grub
screw (25) and lifting off.
6.3
Remove roller housing covers (24) from the elevation tube by placing a screwdriver under the
moulded cutout and prising off.
6.4
Remove four pan head screws (9) and washers (8) and take off each roller housing (7) complete
with bearing assembly. Discard washers (8) and fit new during assembly.
6.5
Extract spindle (11) with bearings (12), spacer (13) and shims (6) from roller housing. Note
number and position of shims for assembly. Remove grub screws (10).
Outer tube
7
To dismantle the outer tube (
):
7.1
Remove the tank assembly and elevation tube from the outer tube (
7.2
Mark the position of the skid clamp (13) on the outer tube.
7.3
Slacken retaining screw (15) and slide skid clamp (13) off the outer tube.
7.4
Remove six grub screws (24) and take off two leg ties (10) and leg tie (with strap) (20). Note
position of leg tie (with strap) (20).
NOTE:
The bearing assemblies are held together by the roller housings (7). All internal
components are released when the housing is separated from the elevation tube.