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FORK & FRAME SERVICE
STEERING HEAD ADJUSTMENT
The steering head frame races are of the floating self-aligning type and have spherical seats.
Therefore they do not fit tightly in the head lug.
Occasionally test the steering head for correct adjustment by exerting pressure upwards
from the extreme ends of the handlebars.
It is particularly important that the adjustment is tested after the first one hundred miles
because of the initial settling down that always occurs in that period.
Should any shake be apparent, adjust the steering head bearings.
Adjust steering head bearings by :
Jack up the front of the machine so that all weight is taken off the front wheel.
(A box
under each footrest serves that purpose.)
Slacken the two fork crown pinch screws.
Slacken the domed nut at top of the steering column.
Screw down the nut underneath the domed nut a little at a time (using adjustable spanner
017249) and, while doing so, test the head assembly for slackness by placing the fingers
over the gap between handlebar lug and frame top lug, at the same time exerting upward
pressure by lifting from the front edge of the front mudguard. Tested in this manner the
slightest slackness is discernible.
Continue to tighten the lower adjusting nut until no perceptible movement can be felt
and yet the steering head is perfectly free to turn, then tighten down the domed nut
in order to lock the adjustment.
Securely tighten the two fork crown pinch screws. (This is very important.)
Remove packing from under footrest.
FRONT FORKS (TELEDRAULIC)
Owing to the unusual construction of the " TELEDRAULIC " fork it is desirable to
understand what happens in use and, in order to follow clearly the descriptions and
subsequent assembly and adjustment instructions, reference to Illustrations 16 and 17
will be necessary.
As will be seen from the general arrangement drawing, Illustration 17, the main members
of the forks are two long tubes.
These are of heavy gauge and are externally ground
to very fine limits.
These fork main, inner, tubes are firmly fixed to the handlebar
clip lug by the top bolts 021830 and are clamped to the fork crown by the clamping
screws. Upon the external of these tubes are mounted the springs and sliding members,
to which latter the front wheel, mudguards and front stand are fixed.
The telescopic action of the sliders, combined with the hydraulic dampers, described
later, explain the word " Teledraulic," coined for the description of the fork.
51
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