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Technical Service Instructions
SI-5UZ0A
General Safety Information
Largest sprocket
Guide pulley
Low adjustment
screw
14
RD-A050
Shifting lever
Gears
Outer casing
Rear derailleur
Multiple Freewheel
Chain
SIS
MF-HG37
CN-HG50
14T
28T
13T
29 teeth or less
Front chainwheel tooth difference
Largest sprocket
Smallest sprocket
Total capacity
Chain toolChain
WARNING
In order to realize the best performance, we
recommend that the following combination be used.
Installation of the rear derailleur
Specifications
Chain length
Smallest sprocket Largest chainring
Guide pulley
Tension pulley
Chain
90°
Stroke adjustment and
cable securing
1. Top adjustment
Turn the top adjustment screw to adjust so that the
guide pulley is below the outer line of the smallest
sprocket when looking from the rear.
1
2
1 2
1 2
Outer line of
smallest sprocket
Guide pulley
Top adjustment
screw
2. Connection and securing of the cable
Connect the cable to the rear
derailleur and, after taking up the
initial slack in the cable, re-secure
to the rear derailleur as shown in
the illustration.
Pull
Tightening torque:
5 - 7 Nm {44 - 60 in. lbs.}
Tightening torque:
8 - 10 Nm
{70 - 86 in. lbs.}
Note:
Be sure that the
cable is securely
in the groove.
Groove
3. Low adjustment
Turn the low adjustment screw so that the guide
pulley moves to a position directly in line with the
largest sprocket.
For the best SIS performance, periodically lubricate
all power-transmission parts.
Please note: specifications are subject to change for improvement without notice.
(English)
© Mar.2003 by Shimano Inc. XBC SZK Printed in Singapore.
One Holland Irvine CA 92618 U.S.A. Phone 949-951-5003
®
Industrieweg 24 NL-8071 CT Nunspeet Holland Phone 31-341-272222
77
Oimatsu-cho 3-cho Sakai Osaka
590-8577
Japan
Right angle to the ground
• Use neutral detergent to clean the chain. Do not use alkali-based or
acid based detergent such as rust cleaners as it may result in
damage and/or failure of the chain.
• Use the reinforced connecting pin only for connecting the narrow
type of chain.
• There are two different types of reinforced connecting pin available.
Be sure to check the table below before selecting which pin to use.
If connecting pins other than reinforced connecting pins are used,
or if a reinforced connecting pin or tool which is not suitable for the
type of chain is used, sufficient connection force may not be
obtained, which could cause the chain to break or fall off.
9-speed super narrow
chain such as
CN-7701 / CN-HG93
8-/7- / 6-speed narrow
chain such as
CN-HG50 / CN-IG51
Reinforced
connecting pin
TL-CN31/TL-CN22
TL-CN31/ TL-CN22 and
TL-CN30/ TL-CN21
6.5mm
7.1mm
Silver
Black
• If it is necessar y to adjust the length of the chain due to a change in
the number of sprocket teeth, make the cut at some other place
than the place where the chain has been joined using a reinforced
connecting pin or an end pin.The chain will be damaged if it is cut
at a place where it has been joined with a reinforced connecting pin
or an end pin.
D
U
R
A
-
A
C
E
End Pin Link Pin
Reinforced
Connecting Pin
• Check that the tension of the chain is correct and that the chain is
not damaged. If the tension is too weak or the chain is damaged,
the chain should be replaced. If this is not done, the chain may
break and you may fall off the bicycle.
• Obtain, read and carefully ser vice instructions when installing parts.
A loose, worn, or damaged parts may cause injury to the rider.
We strongly recommend that only genuine Shimano replacement
parts be used.
• Read these Technical Service Instructions carefully, and keep them
in a safe place for later reference.
SL-A050
4. SIS Adjustment
Operate the shifting lever several times to move the
chain to the 2nd sprocket.Then, while pressing the
lever just enough to take up the play in the lever, turn
the crank arm.
When shifting to 3rd When no sound at all
is heard
Outer casing
adjustment barrel
Best setting
The best setting is when the
shifting lever is operated just
enough to take up the play and
the chain touches the 3rd
sprocket and makes noise.
* Return the lever to its original position (the position
where the lever is at the 2nd sprocket setting and it
has been released) and then turn the crank arm
clockwise.If the chain is touching the 3rd sprocket
and making noise, turn the outer casing adjustment
barrel clockwise slightly to tighten it until the noise
stops and the chain runs smoothly.
Outer casing
adjustment barrel
Tighten the outer cable
adjusting barrel until
the chain returns to the
2nd sprocket.
(clockwise)
Loosen the outer
casing adjustment
barrel until the chain
touches the 3rd
sprocket and makes
noise. (counter
clockwise)
RD-A050
Rear Derailleur
Note
• If gear shifting operations cannot be carried out smoothly, clean the
derailleur and lubricate all moving parts.
• If the amount of looseness in the links is so great that adjustment is
not possible, you should replace the derailleur.
• You should periodically clean the derailleur and lubricate all moving
parts (mechanism and pulleys).
• If gear shifting adjustment cannot be carried out, check the degree
of parallelism at the rear end of the bicycle. Also check if the cable
is lubricated and if the outer casing is too long or too short.
• If you hear abnormal noise as a result of looseness in a pulley, you
should replace the pulley.
• Grease the inner cable and the inside of the outer casing before
use to ensure that they slide properly.
• Because the high cable resistance of a frame with internal cable
routing would impair the SIS function, this type of frame should not
be used.
• Parts are not guaranteed against natural wear or deterioration
resulting from normal use.
• For maximum performance we highly recommend Shimano
lubricants and maintenance products.
• For any questions regarding methods of installation, adjustment,
maintenance or operation, please contact a professional bicycle
dealer.
Frame
Bracket nut
5 mm Allen Key
Push in
and tighten
Bracket
Bracket bolt
Tightening torque:
3 - 4 Nm {26 - 34 in. lbs.}
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