Kellys Junior MARC Series, Owner'S Manual

Page: 5 / 68

owner‘s
manual
JUNIOR
GB
5
CHAIN
Chain transmits power from pedals to rear bicycle wheel. It is one of the most stressed parts of bicycle
therefore its maintainance requires higher attention. Rear derailleur provides correct chain tension.
Correct chain tension on bicycles without rear derailleur is provided by rear wheel displacement in
fork. Life of chain can be prolonged by periodical chain cleaning from mechanical dirt (e.g. dust,
mud) and lubrication with special chain grease. Chain links are sprawled by riding bicycle. Worn
and damaged chain can cause damages on cassette sprockets and chainwheels. If bicycle is used
in hard terrain regularly (e.g. wet and muddy) chain should be replaced by new one each 1000 km.
BRAKE SYSTEM
Brake system consists of brake levers, cables, front and rear calipers, brake pads, and is one of
the most important components of your bike. Right brake lever operates rear brake, left brake
lever operates front brake. Bicycle equipped by coaster brake can be stopped by pushing on
pedal backwards against direction of ride.
Brakes are set up by manufacturer, so for your own safety do not make any adjustments,
until it is really necessary! Check periodically the wear of friction surfaces, brake pads and
keep rims clean. When brake system is mistuned, you have to set it up, or ask a special bike
service for help.
BRAKE CABLES
Brake system of bicycle will be effective only when brake cables are correctly stretched. Brake
cables can be set-up by adjusting screws on brake levers. Lubricate cables and bowdens by
suitable grease. End cup should be placed on cable end to prevent its ply apart and damage.
Damaged or worn cable must be replaced by new one.
BRAKES SET-UP
Brake pads should be 1 mm from the rim in V-type brakes.
WARNING
Brake pads may not touch the tire - otherwise this could cause an over-heating of the tire!
Check the wear, and if it is necessary, change them.
1. Release the safety nut of the adjustment screw on the brake lever. If it is necessary to bring
the pads closer to the rim, turn the adjustment screw counterclockwiseout from the thread.
Secure the safety nut.
2. If the cable is too loose, turn the adjustment screw on the brake lever clockwise - into the
thread. Now release the screw that secures the cable on the brake arm. Stretch the cable, so
that brake pads are aligned with the rim. Firmly tighten the screw and check the brakes.
IMPORTANT WARNING
Pay attention when braking on wet surface - braking distance of your bike is longer! Prior
to each ride check, if the braking system of your bike is in a perfect condition.
FRONT AND REAR WHEEL
It is necessary to check and tighten regularly end nuts by which bicycle wheels are secured to the
forks.
If wheels are secured by a quick release system they must be checked before each
ride to be sure that wheels are secured correctly. Lever of quick release system must be in
position „CLOSE“.
Quick release system enables easy and fast assembling and disassembling of
wheels without using tools. Check before ride if wheels are centred in forks. Tighten quick release nut
so much that lever will put up resistance when closing. When quick release system is closed to the
secured position it must push closer both fork ends.
Move quick release lever only to the sides to
reach its position OPEN or CLOSE. Never turn closed quick release system it could be damaged!
Torque tightening values:
M10 nut of hub axle 30 - 40 Nm
Check the wheel hubs periodicaly, mainly after ride in wet and muddy conditions. The hub axle
should rotate without any friction and loose. If it does not, even after axle‘s cones and safety
nut set-up, it is necessary to disassemble the hub, clean bearing rings and balls, lubricate them
with a new grease, assemble and set up the hub again. If you are not skilled enough for that
work, we advise you to contact a special bike service.
Navod MARC 2012.indd 5 29.3.2012 15:24