Zinc 332/4020 Maintenance Manual Download Page 2

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1b. Inspect the Rim Wear

WARNING!

 If any section of the wheel rim wear grove is no longer visible, the wheel rim should 

be replaced immediately. Do not attempt to ride the bike until the rim is replaced as the braking 
performance could be affected.

Each wheel features a wear grove      machined into the side of the rim. If the wear grove      is no 
longer visible, the wheel rim is worn and should be replaced immediately.

1c. Inspect the Wheel Bearings

Over the life of the bike, the wheel bearings may become loose and/or worn and will therefore need 
servicing.

To check the condition of the wheel bearing, grab the tyre of either the front or rear wheel while holding 
the bike securely. Vigorously move the tyre from side to side. If the wheel moves at the wheel hub (the 
centre of the wheel), the bearings may be worn.

Repairing bearings requires specialist tools. It is recommended that all bearings are repaired by 
quali

fi

 ed bike repair technicians. Contact your local retailer for more information on bearing repairs.

A

It is essential that you regularly inspect and maintain your wheels, especially if your bike becomes 
unstable or vibrates while riding.

1a. Inspect the Trueness of the Wheels

Over the life of the bike, the wheels may begin to run out of true, i.e. they may become buckled. This is 
when the wheel rim moves from side to side.

To check the trueness of a wheel, lift the bike up and spin the wheel. If the wheel wobbles, it is out of 
true and will need repairing.

Repairing wheels requires specialist tools. It is recommended that all wheels are trued by quali

fi

 ed bike 

repair technicians. Contact your local retailer for more information on wheel repairs.

A

Inspecting and Maintaining the Wheels

Maintenance Instructions

  

Customer Helpline 01582 670100

Summary of Contents for 332/4020

Page 1: ...ain important information that will help you get the best from your bike ensuring safe and correct assembly use and maintenance If you need help or have damaged or missing parts call the Customer Helpline on 01582 670100 ZINC 20 inch Dual Suspension Bike Dec 2011 332 4037 332 4020 ...

Page 2: ... wheel the bearings may be worn Repairing bearings requires specialist tools It is recommended that all bearings are repaired by qualified bike repair technicians Contact your local retailer for more information on bearing repairs A A It is essential that you regularly inspect and maintain your wheels especially if your bike becomes unstable or vibrates while riding 1a Inspect the Trueness of the ...

Page 3: ... the tyre levers and the wheel Insert a tyre lever between the wheel rim and the tyre wall Pull downwards on the tyre lever and hook onto the nearest spoke Insert and secure the remaining two tyre levers at suitable points around the wheel rim NOTE Do not leave too much space between tyre levers as the tyre may prove difficult to remove If it is not possible to fully remove the tyre from one side ...

Page 4: ...efit the last section Performing routine maintenance correctly on your bike will ensure you get years of trouble free use Please keep this manual safe for future reference It is recommended that the following maintenance schedule is adhered to This will ensure the bike operates correctly and is safe to use Is the saddle secure Are the front and rear tyres inflated correctly Are the pedals tight Do...

Page 5: ...west gear Turn the lower limit screw clockwise to move the derailleur to the right when viewed from the back of the bike Turn the lower limit screw anti clockwise to move the derailleur to the left when viewed from the back of the bike While riding the bike if the rear gears fail to work correctly and or become noisy the rear derailleur should be adjusted The following are a few examples of when t...

Page 6: ...r when the highest gear is selected Using a suitable screwdriver rotate the upper limit screw until the small gears of the derailleur are vertically aligned below the upper gear Turn the upper limit screw clockwise to move the derailleur to the right when viewed from the back of the bike Turn the upper limit screw anti clockwise to move the derailleur to the left when viewed from the back of the b...

Page 7: ...oises If the gears still do not operate correctly carry out step 3b 3b Check the Cable Tension If the gears change correctly between the highest and lowest gears but not between the lowest and highest gears the cable tension should be increased Rotate the barrel adjuster a quarter of a turn anti clockwise Check the gear change by repeating step 3a Keep checking the gear change and slowly increasin...

Page 8: ...f the mounting bolts at each end of the suspension unit Rear suspension sag can be reduced by turning the adjustable spring seat clockwise Or increased by turning the spring seat anti clockwise Keep testing and adjusting the spring until you get the amount of sag right When you have completed the adjustment process the bike should sag equally front and rear If it doesn t re adjust the rear unit as...

Page 9: ... Tension 1a Adjust the Brake Cable The brake cable must be adjusted to ensure that the brakes are as close as possible to the wheel rim when no pressure is applied to the brake lever Using a suitable spanner or socket loosen the cable pinch bolt until the brake cable is free to move Pull the brake cable until the brake pads are approximately 2mm 0 16 inch from the wheel rim Retighten the cable pin...

Page 10: ...arrel adjuster locking nut by turning it anti clockwise Turn the barrel adjuster bolt to increase or decrease the cable tension This will fine tune the position of the brakes To increase the tension on the brake cable and move the brakes towards the wheel rim turn the barrel adjuster bolt anti clockwise To decrease the tension on the brake cable and move the brakes away from the wheel rim turn the...

Page 11: ...hould be reduced This can be achieved by turning the right spring tension screw anti clockwise If the brake arms lean to the left when viewed from the front of the bike the right hand brake arm spring tension should be increased This can be achieved by turning the right spring tension screw clockwise 1b Adjusting the Spring Tension on the Left Hand Brake Arm If the brake arms lean to the right whe...

Page 12: ...rs Move Hold the front wheel between your legs and try to move the handlebars If the handlebars move the stem bolt may have become loose Re tighten the stem bolt 6 Is the Bike Clean The bike should be cleaned and re oiled regularly to ensure it operates correctly You should perform the following checks once a month or after long rides 1 Check that the bike is Clean and Suitably Lubricated Thorough...

Page 13: ... tightened by qualified bike repair technicians Contact your local retailer for more information on wheel repairs 1 Check the Frame and Forks for Signs of Damage Thoroughly check all the external surfaces of the frame for signs of damage This may include cracks dents or bent mounting points If the frame damaged do not attempt to ride the bike until it has been inspected by a qualified bicycle tech...

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