HM Bike DHM, Руководство пользователя

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Fixing a flat tire
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A note from the outset:
Whenever this instruction manual mentions cleaning fluid or oiling, then this never applies to the bra -
kes, brake pads, brake discs or the brake rims. This would strongly compromise the effectiveness
of the brakes.
Clean your bicycle
Regularly •
With a sponge •
With warm water and a little cleaning fluid (household washing up liquid also works well) •
Do NOT clean your bicycle
With hot oil •
With grease •
With acids •
With brake cleaner (this should only be used to remove grease from brake discs or brake drums) •
With solvent-based liquids •
During cleaning also check your bicycle for
Cracks (replace) •
Deformations (replace) •
Scratches and dents (check up) •
Paint damage (correct) •
You should pay extra attention to caring for your bicycle in difficult conditions, as many parts of
the bicycle are particularly subject to corrosion in winter or at the seaside. Clean all parts made of
stainless steel, zinc and chrome plated parts regularly, and help preserve them with spray wax. If
you store your bicycle, clean it thoroughly first and then store it in a room with an even temperature
with the tires pumped up to the prescribed air pressure.
Please consider the environment and NEVER dispose of any remaining lubricants or cleaning
products in your domestic refuse, drains or in a natural environment.
Every town has a disposal unit where you can dispose of this sort of waste in a safe and environ-
mentally friendly way. Your specialist retailer can also advise you on this.
Fixing a flat tire
Getting a flat tire during a ride is always an unpleasant experience, but it is not a problem that
cannot be solved. You only require the following to continue your ride:
Repair kit – sandpaper, rubber solution and patch •
(or) replacement inner tube with replacement valve •
Two plastic tire levers if possible •
A pump •
An opened ended wrench for wheels with hub axle nuts (without quick release) •
In all of the following steps, the bicycle is standing on its wheels, not upside down on its seat and
handlebars. To repair a flat tire, you have to remove the wheel in question, and to do that you have
to open the corresponding brake. This requires different procedures depending on the type of brake.
To find out the right approach, you must consult the brake manufacturer’s instructions, as damage to
the brakes can lead to accidents.
In the case of cantilever and V brakes, place your hand around the wheel, push the brake pads
against the rim and take out the brake cable on one of the brake arms.
In the case of side-pull rim brakes, you should open the release lever. Depending on the manufac-
turer, this is located either at the end of the brake arm or as a button (that you have to push) on the
brake lever itself.
In the case of hub and drum brakes, there is usually a way of extracting the cable from the brake.
To remove a wheel with drailleur gears, you should first switch the chain to the smallest chainring;
this way the gears provide the least resistance to removing the wheel. Then you should open the
quick release in line with the instructions in the Technology chapter or loosen the allen cap nuts with
a 15 mm wrench in an anticlockwise direction. Subsequently, you will be able to remove the wheel
without any resistance from the chain.
If you are not able to remove the wheel, your bicycle then has a fail-safe mechanism (either molded
retainers or safety washers, which grip a slot in the dropouts). In this case, you have to turn the
quick release or hub axle nut further. Now lift the bicycle up slightly and lightly strike the wheel from
above; it should now fall downwards.
To replace or patch the inner tube, you first have to remove it from the tire. To do this, place the
wheel with the valve facing upwards and then remove the valve cap and the fastening nut: now
let the air out of the tires. Place the first tire lever on the lower edge of the tire, opposite the valve,
and lever the edge of the tire over the rim. Repeat this with the second lever every 10 cm along the
wheel. This will then allow you access to remove the inner tube and valve from the tire.
Locating a hole or tear in the tube requires you to pump it up. Now you should be able to hear where
the air is escaping from the tube, or you could hold the tube underwater and look for the spot where
the air bubbles are escaping. Let the tube dry, mark the hole and then roughen up the area around it
with sandpaper. Apply the rubber solution and let it dry. Then press on the patch from edge to edge
onto the applied rubber solution. The patch should then be left to dry on the air-filled inner tube for
a few minutes.
While you are waiting for it to dry, you should check the inside of the tube with your fingertips for
foreign objects, small stones and dirt, removing these if detected. The rim tape should also be
undamaged with all nipples covered.
When refitting the repaired tube into the tires, start with the valve and then push the first half of the
tube into the rim. Then you should pump the tube up slightly. As soon as it has regained its round
shape, push the tube into the rim completely and push the tire back over the edge of the rim. When
the tube has completely slipped back into the rim, check that it is properly positioned and adjust it if
it is twisted. You are only now allowed to pump the tube up to the recommended tire pressure. The
indicator on the side of the rim allows you to carry out a final check that everything is in the correct
position.
When refitting the wheel, ensure that you fit the front wheel the right way around: The quick release
should be on the opposite side to the chain. Please place the wheel exactly in the center of the
dropouts until it is tight. When refitting the rear wheel, you should first place the chain without tensi -
on over the smallest chainring. When you have tightened the hub axle nut or the quick release, you
can reattach the brake cable. Please ensure that the brake pads are perfectly in line with the brake
surfaces and then do a brake test.
Congratulations! You have repaired a flat tire!