SI-6TG0A - Shimano
SI-6TG0A-002-00
General Safety Information
Specifications
Front Derailleur
WARNING
“Maintenance interval depends on the usage and riding circumstances. Clean regularly the chain
with an appropriate chaincleaner. Never use alkali based or acid based solvents such as rust
cleaners. If those solvent be used chain might break and cause serious injury.”
• Use the reinforced connecting pin only for connecting the narrow type of chain.
• There are two different types of reinforced connecting pins available. Be sure to check the table below before selecting which
pin to use.
Reinforced
If connecting pins other than reinforced connecting pins
Chain
Chain tool
connecting pin
are used, or if a reinforced connecting pin or tool which
9-speed super narrow
is not suitable for the type of chain is used, sufficient
Silver
chain such as
TL-CN32 / TL-CN27
connection force may not be obtained, which could
6.5mm
CN-7701 / CN-HG93
cause the chain to break or fall off.
8- / 7- / 6-speed narrow
• If it is necessary to adjust the length of the chain due
Black
chain such as
TL-CN32 / TL-CN27
to a change in the number of sprocket teeth, make the
7.1mm
CN-HG50 / CN-HG40
cut at some other place than the place where the chain
Reinforced Connecting Pin
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.
• Be careful not to let the cuffs of your clothes get caught in the chain while riding, otherwise you
may fall off the bicycle.
• Check that the tension of the chain is correct and that the chain is not damaged. If the tension
End Pin
Link Pin
is too weak or the chain is damaged, the chain should be replaced. If this is not done, the chain
may break and cause serious injury.
• Use a front chainwheel which is compatible with 9-speed chains in conjunction with Shimano CN-HG73 and CN-HG53 chains. If
a chainwheel for an 8-speed chain or less is used, front chainwheel gear shifting problems may occur, or the chain pins might
fall out, causing the chain to break.
• It is important to periodically check the tightening torques for the crank arms and pedals. After riding approximately 100 km (60
miles), re-check the tightening torques. If the tightening torques are too weak, the crank arms or pedals may come off and the
bicycle may fall over, and serious injury may occur as a result.
• Check that there are no cracks in the crank arms before riding the bicycle. If there are any cracks, the crank arm may break and
you may fall off the bicycle.
• Obtain and read the service instructions carefully prior to installing the parts. Loose, worn or damaged parts may cause the
bicycle to fall over and serious injury may occur as a result. We strongly recommend only using genuine Shimano replacement
parts.
• Obtain and read the service instructions carefully prior to installing the parts. If adjustments are not carried out correctly, the
chain may come off and this may cause you to fall off the bicycle which could result in serious injury.
• Read these Technical Service Instructions carefully, and keep them in a safe place for later reference.
Normal type
X = Available
Model number
FD-M430 / FD-M431
Applicable to both normal type and top route type
Installation band diameters:
S (28.6 mm), M (31.8 mm), L (34.9 mm)
X
Front chainwheel tooth difference
12T
Front derailleur installation band diameter
S, M, L
Note
• In addition, if pedaling performance does not feel normal, check this once more.
• Before riding the bicycle, check that there is no play or looseness in the connection. Also, be sure to retighten the crank arms
and pedals at periodic intervals.
• When installing the pedals, apply a small amount of grease to the threads to prevent the pedals from sticking. Use a torque
wrench to securely tighten the pedals. Tightening torque: 35 - 55 N·m {305 - 479 in. lbs.}. The right-hand crank arm has a righthand thread, and the left-hand crank arm has a left-hand thread.
• Do not wash the bottom bracket with high-pressure jets of water.
• If you feel any looseness in the bottom bracket axle, the bottom bracket should be replaced.
• If gear shifting operations do not feel smooth, wash 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 wash the chainrings in a neutral detergent and then lubricate them again. In addition, cleaning the chain
with neutral detergent and lubricating it can be a effective way of extending the useful life of the chainrings and the chain.
• The cuffs of your clothing may get dirty from the chain while riding.
• If the chain keeps coming off the chainrings during use, replace the chainrings and the chain.
• When the chain is in the position shown in the illustration, the chain may contact the front
chainrings or front derailleur and generate noise. If the noise is a problem, shift the chain
Front
onto the next-larger rear sprocket or the one after.
chainrings
• Apply grease to the bottom bracket before installing it.
• For smooth operation, use the specified outer casing and the bottom bracket cable guide.
Rear
• This front derailleur is for triple front chainwheel use only. It cannot be used with the
sprockets
double front chainwheel, as the shifting points do not match.
• When installing the top route type, choose a frame that has three outer casing holders as
shown in the illustration at right.
Outer casing holders
• Use an outer casing which still has some length to spare even when the handlebars are turned all the way
to both sides. Furthermore, check that the shifting lever does not touch the bicycle frame when the
handlebars are turned all the way.
• Grease the inner cable and the inside of the outer casing before use to ensure that they slide properly.
• Operation of the levers related to gear shifting should be made only when the front chainwheel is turning.
• Do not disassemble the indicator and shifting lever unit, as this may damage them or cause mis-operation.
• 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.
63° - 66°, 66° - 69°
Applicable chain line
50 mm
5 mm Allen key
3. Top adjustment
Front chainwheel
FC-M430
Model number
FC-M430-8
FC-M430-8-1A
Rear sprockets
FC-M431
FC-M431-8
44 - 32 - 22 T
44 - 32 - 22 T
Bolt circle diameter
104 / 64 mm
Crank arm length
170 / 175 mm
Pedal thread dimensions
48 - 36 - 26 T
44 - 32 - 22 T
48 - 36 - 26 T
BB-UN26 (-E)
BB-ES25 (-E)
Pro-Set alignment
block
Model number
BB-UN26 (-E)
BB-ES25 (-E)
BB-UN26 (-K)
BB-ES25 (-K)
Spindle length
LL113
118
LL123
126
Bottom Bracket
Chain guide
inner plate
Chain
Bottom bracket cable guide
Gear shifting operation
When lever (A) is pressed once,
there is a shift of one step from a small
chainring to a larger chainring.
Lever (B)
It is recommended that you adjust
the grip widths of the levers to the
most comfortable widths for gear
shifting and braking.
Install the inner hole cover by
turning it as shown in the
illustration until it stops.
Do not turn it any further than this,
otherwise it may damage the screw
thread.
After completion of steps 1 - 4, move the shifting lever to check the
shifting. (This also applies if shifting becomes difficult during use.)
Unit cover
Feed lever
Inner hole cover
from intermediate chainring
to largest chainring.
Inserting the inner cable
Insert the inner cable into the outer casing from the end with the
marking on it. Apply grease from the end with the marking in
order to maintain cable operating efficiency.
To shift from a large chainring to a smaller chainring
Lever (B)
2-way release
Marking
Example:
Cutting the outer casing
from largest chainring to
intermediate chainring.
When cutting the outer casing, cut the opposite end to the end
with the marking. After cutting the outer
casing, make the end round so that the
inside of the hole has a uniform diameter.
Attach the same outer end cap to the cut end of the outer casing.
Installation of the Front Derailleur, Bottom Bracket and Front Chainwheel
Install using the special tool TL-UN74-S / TL-UN66. First install the
main body, then the adapter.
Chain
Intermediate
chainring
5. Troubleshooting chart
Example:
When lever (B) is pressed once,
there is a shift of one step from a large
chainring to a smaller chainring.
Outer end cap
Adjust and then install the front derailleur as shown in the
illustration. Do not remove the Pro-Set alignment block at this time.
Pro-Set alignment block
Cut off the excess length of inner cable and then install the inner
end cap.
While firmly pulling the inner cable, secure by tightening the fixing
bolt with a 5 mm Allen key.
Gear teeth
should come
within this range
If the chain falls to the crank
side.
Tighten the top adjustment screw
clockwise (about 1/4 turn).
If shifting is difficult from the
intermediate chainring to the
largest chainring.
Loosen the top adjustment screw
counterclockwise
(about 1/8 turn).
If shifting is difficult from the
intermediate chainring to the
smallest chainring.
Loosen the low adjustment screw
counterclockwise
(about 1/4 turn).
Tighten the top adjustment screw
If there is interference between
the chain and the front derailleur clockwise (about 1/8 turn).
inner plate at the largest
chainring.
Loosen the top adjustment screw
If there is interference between
the chain and the front derailleur counterclockwise
(about 1/8 turn).
outer plate at the largest
chainring.
If the intermediate chainring is
skipped when shifting from the
largest chainring.
Loosen the outer casing
adjustment barrel
counterclockwise (1 or 2 turns).
If there is interference between
Tighten the outer casing
the chain and front derailleur
adjustment barrel clockwise
inner plate when the rear
(1 or 2 turns).
sprocket is shifted to the largest
sprocket when the chainwheel is
at the intermediate chainring
position.
If the chain falls to the bottom
bracket side.
Tighten the low adjustment screw
clockwise (about 1/2 turn).
If the lever is stiff when shifting
from the intermediate chainring
to the largest chainring
Loosen the top adjustment screw
counterclockwise (about 1/4
turn).
Pro-Set gauge
< Normal type >
The level section of the chain guide
outer plate should be directly above
and parallel to the largest chainring.
Secure using a 5 mm Allen key.
Plastic
< Top route type >
Note:
Pass the cable
through as shown
in the illustration.
Chainwheel
(largest chainring)
OT-SP40
FD-M430 / FD-M431
Wire
fixing bolt
Chain guide
Use an 8 mm Allen key to install the front chainwheel.
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
FC-M430 / FC-M430-8 / FC-M430-8-1A / FC-M431 / FC-M431-8
BB-UN26 (-E) / BB-UN26-K / BB-ES25 (-E) / BB-ES25-K
5 mm Allen key
• FD-M431
CN-HG53
< Top route type >
< Normal type >
SM-SP17 / SM-BT17
Note:
Pass the cable
through as shown
in the illustration.
8 mm Allen key
Chain length
Add 2 links (with the chain on both
the largest sprocket and the largest
chainring)
Wire
fixing bolt
Largest sprocket
Largest chainring
3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan
* Service Instructions in further languages are available at : http://techdocs.shimano.com
Please note: specifications are subject to change for improvement without notice. (English) © Apr. 2011 by Shimano Inc. XBC IZM Printed in Singapore.
Front chainwheel tightening torque:
35 - 50 N·m {305 - 435 in. lbs.}
A
Outer casing adjustment barrel
Adjusting the grip width
A : Becomes narrower
B : Becomes wider
ST-M430
Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222
Largest
sprocket
B
Chain guide
inner plate
• FD-M430
This service instruction explains how to use and maintain the Shimano bicycle parts which have been used on your new bicycle.
For any questions regarding your bicycle or other matters which are not related to Shimano parts, please contact the place of
purchase or the bicycle manufacturer.
One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003
Low adjustment
screw
When carrying out adjustment, set the
chain to the largest sprocket, and at the
front, set the chain to the intermediate
chainring. Adjust using the outer casing
adjustment barrel so that the clearance
between the chain guide inner plate and
the chain is 0 - 0.5 mm.
Chain position
Operate lever (B) 2 or more
times, check on the indicator that
the low position is correct, and
then secure the inner cable.
To shift from a small chainring to a larger chainring
Chain
FD-M430
Main body
Alivio
Chain
Smallest
chainring
2. Connecting and securing
the inner cable
Aluminum or steel
Front chainwheel
Largest
sprocket
68 / 73 mm (1.37 X 24 T.P.I.)
In order to realize the best performance, we recommend that the following combination be used.
Front derailleur
FD-M431
50 mm
Lever (A)
initial position
Chain guide outer
plate
4. Adjustment of the intermediate
chainring
Chain position
This release lever is equipped with a 2-way release mechanism which allows release operations
to be carried out by either pushing or pulling the lever. Both lever (A) and lever (B) always return
to the initial position when they are released after shifting. When operating one of the levers,
always be sure to turn the crank arm at the same time.
Top adjustment
screw
Largest
chainring
BB-ES25 (-K)
Bottom Bracket
Shell width (Thread dimensions)
Smallest
sprocket
FD-M430
FD-M430 / M431
Chain line
FD-M431
Chain position
First remove the Pro-Set alignment block .
Next, set so that the clearance between the chain guide inner
plate and the chain is 0 - 0.5 mm.
BB-UN26 (-K)
Applicable front derailleur
Front Drive System
Outer casing
1. Low adjustment
CN-HG53
Applicable bottom bracket
Adapter
RAPIDFIRE-Plus (Shift brake lever)
SIS Adjustment
B.C. 9/16" x 20T.P.I. (English thread)
Applicable chain
Set so that the clearance
between the chain guide
outer plate and the chain is
0 - 0.5 mm.
Be sure to follow the sequence described below.
9
Front chainwheel tooth combination
SI-6TG0A-002
Series
Pull
Chainstay angle
Chainstay angle (a)
Adapter / bottom bracket tightening torque:
50 - 70 N·m {435 - 608 in. lbs.}
Technical Service Instructions
Pull
Tightening torque :
6 - 8 N·m
{53 - 69 in. lbs.}
When using the S, M size, use an
installation band with a diameter of 28.6
mm, 31.8mm and install it to a L size
adapter.
22T
Min. difference between top and intermediate
Top route type
Use a handlebar grip with a maximum outer diameter of 36 mm.
CAUTION
• If the chain is on the smallest or intermediate chainring, there is the danger of injury from the tips of the teeth on the largest
chainring.
After taking up the initial slack in the cable, re-secure to the front
derailleur as shown in the illustration.
Installation of the lever
Chain
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
■ Refer to the Service Instructions for the Rear Drive
System for details on replacing and installing the
indicator unit.
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