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Updated 23/05/07RAOM0507 Apollo Bicycle Company Pty. Ltd. ABN: 60 001 914 469
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Headset Inspection
The headset is responsible for locking the fork
into the frame. Every month the headset bearing
adjustment should be tested. This is done by
standing astride the frame top tube with both feet
on the ground and firmly applying the front brake
and rocking the bicycle back and forward.
If the headset is loose, it needs to be tightened to
avoid potential damage to both the bicycle and the
rider. However, do not over-tighten. If the fork tends
to stick or bind at any point when rotated slowly
sideways, the bearings are too tight.
Quill Type Assemblies
Adjustment
To adjust the headset the top locknut needs to be
loosened or removed completely, as well as the
lock washer and reflector bracket, if fitted. Turn the
adjusting cup clockwise until finger tight. Replace
the lock washer or reflector bracket and using an
appropriate wrench to re-tighten the locknut.
Note: Bearing damage will occur if over-tightened.
Prior to riding always check that the headset is properly
adjusted and that the headset locknut is securely fastened.
‘Ahead Set’ Type Assemblies
When assembling a new bike with this type of fitting, the dust cap covering the Allen
head bolt needs to be removed and the bolt holding the top plug undone. Remove the
cardboard cover. Slip the handlebar stem over the exposed fork steerer and replace the
top plug. The handlebars and the forks need to be facing the front. Using the Allen head
centre bolt, secure the steering assembly until there is no freeplay. Take care not to over
tighten. Tighten up the binder bolts which clamp the handlebar stem to the fork steerer.
Ensure the handlebar stem cannot turn in the steerer tube.
To adjust the headset after the bicycle is assembled:
- Loosen the stem binder bolts.
- Use the Allen bolt to re-adjust the compression mechanism.
- Re-fasten the stem binder bolt firmly.
Unlike standard headsets, the 'Ahead Set' has an unthreaded, full-thickness bicycle fork
steering tube. Adjustments are made using an Allen headed compression bolt, and then
are fastened by clamping the handlebar stem directly onto the fork steerer.
Lock Nut
Lock Washer
Adjusting Cup/Cone
Ball Retainer
Ball Retainer
Top Head Cup/Cone
Bottom Head Cap
Crown Cone