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General Safety Information
WARNING
•• Downhill bicycle riding and off-road bicycle riding are inherently
dangerous activities. There is a risk of being involved in an accident
that can result in a serious injury or even death. It is strongly
recommended that riders wear protective head and body gear and
perform thorough safety checks of their bicycles before riding. Please
remember that you are riding at your own risk and that you have to
consider your experience and your skills very carefully.
•• Install a bashguard (165 mm) to the front chainwheel. If the bashguard is not
installed, the chain may come off the chainrings or damage to the chainrings
may occur. If the bashguard used is larger than 165 mm, it may interfere with the
front derailleur and problems with shifting may occur.
•• Be careful not to let the cuffs of your clothes get caught in the chain while riding,
otherwise 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.
Note
•• This front derailleur is only for frames with a 150 mm rear dropout end
width and a 54.3 mm front chain line.
•• Turn the top adjustment screw to adjust so that the chain does not sit on top of the
bash guard.
•• 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.
•• 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 onto the next-
larger rear sprocket or the one after.
•• For smooth operation, use the specified outer casing and the bottom bracket
cable guide.
•• This product is not warranted against damage resulting from use such as
jumping while riding or if the bicycle falls over, except if such malfunctions result
from non conforming materials or manufacturing methods.
•• 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.
Technical Service Instructions
FD-M815
Front derailleur
FD-M817
Specifications
Model number
Front derailleur installation band diameter
Top swing type
Down swing type
Front chain line
Rear dropout end width
Top gear teeth
Front chainwheel tooth difference
Dual-Pull
Installation of the front derailleur
Adjust and then install the front derailleur as shown in the
illustration. Do not remove the Pro-Set alignment block at this time.
<Front derailleur height and parallelism adjustment>
With the flat part of the chain guide outer plate on the inside of the
bash guard as shown in the illustration, adjust the height of the front
derailleur so that the outer edge of the bash guard is within the
specified range on the Pro-Set gauge. Also adjust so that the flat
part of the outer plate is parallel to the inner surface of the bash
guard. Use a 5 mm Allen key to tighten.
Outer edge of bash guard
should come within this
range
Pro-Set gauge
Front
chainrings
Rear
sprockets
Chain guide outer plate
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
When installing the components to carbon frame/handle bar
surfaces, verify with the manufacturer of the carbon frame/parts for
their recommendation on tightening torque in order to prevent over
tightening that can cause damage to the carbon material and/or
under tightening that can cause lack of fixing strength for the
components.
SIS Adjustment
Be sure to follow the sequence described below.
1. Low adjustment
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.
Pro-Set alignment
block
SI-5L10A-001
Chain position
Largest
Small
sprocket
chainring
2. Connecting and securing the inner cable
Operate the lever (B) 2 times or more
to set the lever to the lowest position.
Then remove the inner hole cover and
FD-M815
FD-M817
connect the inner cable.
S, M, L
——
——
54.3 mm
150 mm
Install the inner hole cover by turning it
36 T
as shown in the illustration until it
14 T
stops. Do not turn it any further than
this, otherwise it may damage the
screw thread.
Tightening torque :
0.3 - 0.5 N·m {3 - 4 in. lbs.}
Cutting the outer casing
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
Pro-Set alignment block
the outer casing.
• FD-M815
< Normal type >
Bash guard
• FD-M817
< Normal type >
FD-M815
After taking up the initial slack in the cable, re-secure to the front
FD-M817
derailleur as shown in the illustration.
Normal type
B
A
Low adjustment
screw
A
B
Chain guide
inner plate
Chain
3. Top adjustment
Set the chain onto the large chainring and the largest sprocket
Lever (B)
when carrying out this adjustment. Turn the outer casing
adjustment barrel to adjust so that the clearance between the
chain guide inner plate and the chain is 0 - 0.5 mm.
position
Inner cable
Inner hole cover
Inner hole cover
Turn the top adjustment screw
to adjust so that the front
derailleur cannot move in the
top direction any further than
this. Be careful not to tighten
the screw too much at this
time.
Outer end cap
4. Troubleshooting chart
After completion of steps 1 - 3, move the shifting lever to check the
< Top route type >
shifting. (This also applies if shifting becomes difficult during use.)
If shifting is difficult from the
large chainring to the small
chainring.
Note:
If there is interference between
Pass the cable
the chain and the front derailleur
through as shown
inner plate when the chain is on
in the illustration.
the large chainring and the
largest sprocket
Wire
fixing bolt
If there is interference between
the chain and the front derailleur
5 mm Allen key
outer plate at the large
chainring.
< Top route type >
If the chain falls to the bottom
Note:
bracket side.
Pass the cable
through as shown
in the illustration.
Wire
fixing bolt
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
Top route type
One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003
Pull
Pull
Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222
3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan
Please note: specifications are subject to change for improvement without notice. (English)
© Mar. 2008 by Shimano Inc. XBC SZK Printed in Japan.
Chain
Largest
Large
sprocket
chainring
A
B
B
Chain guide
A
inner plate
Chain
Outer casing adjustment barrel
FD-M817
A
B
A
B
Top adjustment
screw
Chain guide
FD-M815
outer plate
Chain
Loosen the low adjustment screw
counterclockwise
(about 1/4 turn).
Tighten the top adjustment screw
clockwise (about 1/8 turn). If this
still does not solve the problem,
tighten the outer casing
adjustment barrel by turning it
clockwise by 1 to 2 turns.
Loosen the top adjustment screw
by turning it counterclockwise
(about 1/2 turn).
If this still does not solve the
problem, loosen the outer casing
adjustment barrel by turning it
counterclockwise by 1 to 2 turns.
Tighten the low adjustment screw
clockwise (about 1/2 turn).
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