Advice 1: How to install the rear shifter on the bike

Modern multi-speed bikes have sophisticated shifting with lots of gear that allows you to ride with the least effort in all road conditions. Advanced models of bikes have 16 to 30 speeds, of which 2-3 on the leading star and 7-10 on the slave.
How to install the rear shifter on the bike
You will need
  • - set of Allen keys.
  • - set carob or socket wrench;
  • - flat and Phillips screwdriver
Instruction
1
For removing the old rear switch speeds, loosen the bolt rope and pull the rope. Then Unscrew the rollers on the gear selector, or remove the chain from the bike. Unscrewing the bolt to the switch, remove it.
2
To install the rear shifter, screw it to the ceiling. When tightening the fastening screws of the retract switch back to avoid damage to the screw position of the upper roller relatively to the cassette. Then tighten the adjusting lugs on the switch and on the lever until it stops and loosen exactly 1 turn. Pull the cable drive, put it into the groove and lock the bolt.
3
After you install the rear shifter, it must be adjusted. Adjustment is made by the mounting bolt control cable, a tension adjustment screw control cable, limiting screws upper and lower transfer screw adjust the position of the upper roller relative to the stars. The tension of the control cable can be adjusted by means of lugs on the lever. On some switches may not have all the adjusting elements, and the switches Simano additionally equipped with a tension adjustment screw spring parallelogrammic mechanism.
4
Before adjusting, loosen the control wire adjusting screw or lug on the lever. Install the chain on the smallest sprocket. Rotating screw-top gear limiter set the frame with rollers so that the plane of the rollers to line up exactly with the plane of the small sprocket. Then install the chain on the largest sprocket. Similarly, rotating the screw-limiter low transmission, achieve precise coincidence of the planes of the large sprocket and rollers.
5
Install the chain on the smallest front sprocket and biggest rear. Turning the screw adjust the position of the rollers make when pedaling ago the roller does not touch the teeth of the large sprocket, and between them was a gap of 3-5 mm. Try to shift gears by hand turning the pedals of a Bicycle. If the chain barely moves from big stars to small, loosen the control cable with the adjusting lug. Having a clear switch work, try switching under load as you ride the bike. If need be, make an additional adjustment.
6
If the adjustment failed, check the freedom of stroke of the control cable. If it's sticking, clean it and lubricate. If it has broken strands, replace it. Check the alignment of the plane of the chain tensioner and the plane of the stars. When their mismatch straighten the bracket of the shifter. Inspect loose rollers. Backlash at the end of the frame chain tensioner in the transverse direction should not exceed 3-4 mm.

Advice 2: How to adjust rear derailleur

If riding a bikee is interrupted by a jump off of the chain because of its weak tension, and the rear switch does not work when screwed to the mount, then it is time to engage in his adjustment. This can be done in a few steps.
How to adjust rear derailleur
You will need
  • - bike with gears.
Instruction
1
Clean any dirt from the switch, the tensioners and the chain. The last lubricate. Please note that the screws on the back of the switches, depending on model, to be different. Limiting screws are most often found on the side, not the rear.
2
Install the chain on the smallest sprocket at the rear and the front. On the switch, locate the adjustment screw and the L screw H. Loosen the cable of the rear derailleur. This clockwise turn to lock the reel tension adjustment. The same actions produce the drum on the lever.
3
Remove the cable. With internal hexagon, loosen the fixing screw of the cable and remove it from the bracket. You can not remove it from the switch, but check the condition it's in. Unwound or frayed cable replace, and dirty – clean and lubricate. Put in order, it will ensure precise shifting.
4
Install large gear. To do this, stand behind the bike and align the smallest sprocket and the rollers of the tensioner, by turning the screw N. Make sure that the rollers are on the same line with an asterisk.
5
If the tensioners will remain shifted to the right, the chain will go to the large gears to work. In this case, turn screw H clockwise. If the rollers will be shifted to the left, the circuit will not be able to move freely to the smaller sprocket. Here it is necessary to twist all the same the screw counterclockwise. When properly adjusted the large gear chain on the smallest sprocket will work silently and without hopping capability to the side.
6
Install the cable. Tuck it under the screw mounts. With one hand, pull it strongly and the other at this point, tighten the fastening screw. If you have a groove for the cable, make sure the cable got caught in it and not lay down. Tighten the screw, be careful not to cross thread the lens.
7
Install small gear. To do this, remove the screw L almost to the end, so that it does not restrict the movement of the switch. Start rotating the pedal and simultaneously move the lever into first gear. Do this carefully as the adjustment of the chain falling into the spokes, slipped to the left most sprocket.
8
Adjust the small gear. Standing behind the bike, turn the L screw and align the large sprocket and tensioners while they will not appear on the same line. Typically, the screw must be tightened prior to its tight rotation.
9
Adjust the chain tensioner. Putting it on the smallest front and largest rear sprocket, roll the pedal back. If the upper tensioner pulley for the sprocket teeth, turn the screw after removal of the roller from the teeth of 5 mm. Then put the chain on the smallest sprocket and check the chain tension there.
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