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Wheel alignment
12 After steering chain tensioning it may be necessary to re-align the wheel assembly. The procedure is as
follows (Fig 4.2):
12.1 Remove cable guard and covers.
12.2 Set change-over gear to CRAB
12.3 Ensure that, with indicator on steering ring aligned with mark on steering wheel assembly, the
steering wheels are set straight ahead. If not, slacken socket screws (2) on clamp block (1), adjust as
necessary and retighten clamp block screws (2).
12.4 Slacken the socket screw (4) on the clamp (3) on one of the pairs of crabbing wheels. Set a
straight edge against the steering wheels and the crabbing wheels using the outer face of each pair as
the datum. Turn the steering ring until the straight edge is flush along wheel faces of steering and
crabbing wheels. Retighten clamp screw (4).
12.5 Repeat Para 12.4 for other pair of crabbing wheels.
12.6 Refit cable guard and covers.
Column guide roller adjustment
13 To adjust the column guide rollers, proceed as follows (Fig 4.3):
13.1 Remove any load from head mounting platform.
13.2 Using nitrogen charging equipment depressurize pedestal to 3.45 bar (50 psi).
Fig 4.3 Column guide roller adjustment
(1)
(2)
(3)
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