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

Lock Nut

Lock Washer

Adjusting Cup/Cone

Ball Retainer

Top Head Cup/Cone

Bottom Head Cap

Ball Retainer

Crown Cone

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.

38

RAOM0507

Apollo Bicycle Company Pty. Ltd. ABN: 60 001 914 469

Updated 23/05/07

Page 40
Image 40
Apollo Radius manual Headset Inspection, ‘Ahead Set’ Type Assemblies