43
Tread | Tread Worn Off |
Usable Brake Shoe Worn Out Brake Shoe (Replace)
Align brake shoe with rim surface
Direction of rim |
| Brake Shoe Holding Nut | ||
rotation |
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0.5 - 1.0 mm
On some newer type cantilever brakes, the main brake cable continues through the central cable carrier to an anchor bolt on one of the brake arms. A shorter link cable reaches from the carrier and the hook on the other brake arm. Adjustment of the cable length is made after loosening the anchor bolt on the brake arm.
Adjust the brake pad position so that it is parallel to the wheel rim and so that the leading edge makes first contact. To do this, fit an Allen key into the brake pad holding bolt, loosen the fixing nut and adjust. Move the brake pad along its mounting post to alter the distance from the rim, and move the curved adjustment washer to alter the angle of the pad.
On some models there is a
Scooters with cantilever brakes must be fitted with safety devices to prevent a possible accident in the event of the brake control cable or the straddle bridge becoming loose or breaking while riding. These are usually the reflector brackets, and must be fitted in the front and rear. The bracket will prevent the straddle cable from interfering with the wheel should the cable become discon- nected from the control cable. If the reflector brackets are not fitted in this position, then alternative emergency cable safety stops must still be fitted.
Problem | Possible Cause | Remedy |
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Brakes not working effectively | - | Brake blocks worn down | - | Replace brake blocks |
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| - Brake blocks/rim greasy, wet or dirty | - Clean blocks and rim |
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| - | Brake cables are |
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| binding/stretched/damaged | - | Clean/adjust/replace cables |
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| - Brake levers are binding | - | Adjust brake levers |
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| - Brakes out of adjustment | - | Center brakes |
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When applying the brakes | - | Brake blocks worn down | - | Replace blocks |
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they squeal/squeak | - | Brake block | - | Correct block |
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| - Brake blocks/rim dirty or wet | - Clean blocks and rim |
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| - | Brake arms loose | - | Tighten mounting bolts |
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Knocking or shuddering when | - | Bulge in the rim or rim out of true | - True wheel or take to a bike shop |
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applying brakes |
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| for repair |
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| - Brake mounting bolts loose | - | Tighten bolts |
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| - Brakes out of adjustment | - Center brakes and/or adjust brake |
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| block |
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| - Fork loose in head tube | - | Tighten headset |
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Wobbling wheel | - | Axle broken | - | Replace axle |
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| - Wheel out of true | - | True wheel |
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| - | Hub comes loose | - | Adjust hub bearings |
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| - | Headset binding | - | Adjust headset |
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| - | Hub bearings collapsed | - | Replace bearings |
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| - | QR mechanism loose | - | Adjust QR mechanism |
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Steering not accurate | - | Wheels not aligned in frame | - | Align wheels correctly |
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| - Headset loose or binding | - | Adjust/tighten headset |
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| - Front forks or frame bent | - Take scooter to a bike shop for |
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| possible frame realignment | 44 |
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