Note:
Do not install the nut upside-
down.
If it is installed upside-down, it will
not be possible to secure the
brake lever to the handlebars, and
damage may occur.
Series
XTR
SL-M980-R / SL-M980-IR
OT-SP41 (SIS-SP41)
RD-M980
SGS / GS
FH-M985 / FH-M988
10
CS-M980 / CS-M771-10
CN-M980
SM-SP17 / SM-BT17
RAPIDFIRE (Shifting lever)
Outer casing
Rear derailleur
Type
Freehub
Gears
Cassette sprocket
Chain
Bottom bracket guide
Technical Service Instructions
SI-6T70A-001
Rear Drive System
In order to realize the best performance, we recommend that the following combination be used.
Specifications
Model number
Type
Gears
Total capacity
Largest sprocket
Smallest sprocket
Front chainwheel tooth difference
RD-M980
SGS
GS
35 T
36 T
11 T
18 T
10
41 T
36 T
11 T
18 T
Rear Derailleur
Model number
CS-M771-10
CS-M980
Group name
bJ
bk
bL
Gears
10
10
10
Tooth combination
11, 13, 15, 17, 19, 21, 23, 26, 30, 34 T
11, 13, 15, 17, 19, 21, 24, 28, 32, 36 T
11, 12, 14, 16, 18, 20, 22, 25, 28, 32 T
Cassette sprocket tooth combination
Model number
Gears
FH-M985 / FH-M988
10
32
No. of spoke holes
Freehub
Chain length on bicycles with rear suspension
The length of A will vary depending on the movement of the rear
suspension. Because of this, an excessive load may be placed on
the drive system if the chain length is too short. Set the length of
the chain by adding two links to the chain when the rear
suspension is at a position where dimension "A" is longest and the
chain is on the largest sprocket and the largest chainring. If the
amount of movement of the rear suspension is large, the slack in
the chain may not be taken up properly when the chain is on the
smallest chainring and smallest sprocket.
A
A'
Add 2 links (with the chain on both
the largest sprocket and the largest
chainring)
Largest
sprocket
Chain
Largest
chainring
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.
Operate the lever (B) 9 times or more
to set the lever to the highest position.
Then remove the inner hole cover and
connect the inner cable.
Inner hole cover
Inner hole cover
Lever (B)
Cutting the outer casing
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.
Outer end cap
The sealed cap with
tongue and the rubber
shield should be
installed to the outer
casing stopper of the
frame.
Rubber shield
Rubber shield
Be careful not to bend
Sealed cap with tongue
* If the rear derailleur moves to a large degree, such as in
bicycles with rear suspension, it is
recommended that you replace
the cap with an aluminum cap.
The end of the outer casing which
has the aluminum cap should be
at the derailleur side.
Aluminum cap
Derailleur side
SI-6T70A-001-00
General Safety Information
WARNING
Note
• 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 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.
• If the wheel becomes stiff and difficult to turn, you should lubricate it with grease.
• Do not apply any oil to the inside of the hub, otherwise the grease will come out.
• You should periodically wash the sprockets 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 sprockets and the chain.
• If the chain keeps coming off the sprockets during use, replace the sprockets and the chain.
• Use a frame with internal cable routing is strongly discouraged as it has tendencies to impair the SIS shifting function due to its
high cable resistance.
• Always be sure to use the sprocket set bearing the same group marks. Never use in combination with a
sprocket bearing a different group mark.
• 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.
• A special grease is used for the gear shifting cable. Do not use DURA-ACE grease or other types of
grease, otherwise they may cause deterioration in gear shifting performance.
• Grease the inner cable and the inside of the outer casing before use to ensure that they slide properly.
• For smooth operation, use the specified outer casing and the bottom bracket cable guide.
• Operation of the levers related to gear shifting should be made only when the front chainwheel is turning.
• If the brake fluid used in the oil disc brakes is of a type which tends to adhere to the plastic parts of the shifting lever, this may
cause the plastic parts to crack or become discolored. Therefore, you should make sure that the brake fluid does not adhere to
these plastic parts.
The mineral oil which is used in SHIMANO disc brakes does not cause cracking or discoloration if it adheres to plastic parts, but
such parts should be cleaned with alcohol beforehand to prevent foreign particles from adhering.
• Do not disassemble the shifting lever unit, as this may damage it or cause mis-operation.
• Parts are not guaranteed against natural wear or deterioration resulting from normal use.
• Read these Service Instructions in conjunction with the Service Instructions for the FH-M985 / M988.
• 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.
g
a -18T
-
S
H
IM
AN
O
HYPE
RGL
IDE
C
ag-15T
ag-1
3T
Group marks
“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.”
•
In order to obtain good gear shifting performance, this chain has a forward side and a reverse side, and the
sides are marked so that the chain will face the correct way when installed. The proper design performance
will be obtained when the chain is installed so that it faces the correct way. If it is installed so that it faces
the opposite way, the chain may come off and the bicycle may fall over and serious injury may occur as a
result.
• Check that the wheels are fastened securely before riding the bicycle. If the wheels are loose in any way, they may come off the
bicycle and serious injury may result.
• Use the reinforced connecting pin only for connecting
the narrow type of chain.
• 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.
• If it is necessary 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. The chain will be damaged
if it is cut at a place where it has been joined with a 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 cause serious injury.
•
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.
Reinforced Connecting Pin
Link Pin
Link Pin
Chain tool
Chain
10-speed
super narrow chain
for MTB
Reinforced
connecting pin
TL-CN32
TL-CN23
TL-CN27
with groove (3)
with groove (2)
One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003
Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222
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. 2010 by Shimano Inc. XBC SZK Printed in Japan.
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.
Installation of the sprockets
The groove is
wide at one
place only.
Wide part
A
ac-14T
For installation of the HG sprockets, use the special tool (TL-LR15/LR10) to tighten
the lock ring.
To replace the HG sprockets, use the special tool (TL-LR15/LR10) and TL-SR21 to
remove the lock ring.
Tightening torque:
30 - 50 N·m {261 - 434 in. lbs.}
For each sprocket, the surface that has the group mark should face
outward and be positioned so that the wider part of each sprocket
and the A part (where the groove width is wide) of the freewheel
body are aligned.
Lock ring
TL-LR15/LR10
Tool
(TL-SR21)
Disassembly
Refer to the RD-M980 (Rear Derailleur) Service Instructions for
details on installing the rear derailleur and SIS adjustment.
Connection and securing of the inner
cable
5 mm Allen key
Replacement of the freewheel body
(FH-M985)
First, pull out the hub axle by following the procedure shown in the
illustration.
The double-lock section at the freewheel side cannot be
disassembled.
17 mm spanner
Disassembly
(2)
Cone with dust cover
(Cannot be disassembled)
Lip is on the outside
Seal
Rotor fixing serrations (FH-M985)
Left side Tightening torque:
15 - 20 N·m {132 - 172 in. lbs.}
Hub axle
(3)
Note:
• When removing and installing the seal, do it very carefully so that
the seal does not become bent.
When reinstalling the seal, make sure that it is facing the right way,
and insert it as far as it will go.
• Do not disassemble the dust cover which is crimped onto the cone.
(1)
(4)
After removing the hub axle, remove the freewheel body fixing
bolt (inside the freewheel body), and then replace the freewheel
body.
Note:
When replacing the freewheel body, replace the freewheel body
fixing bolt at the same time. Be sure to apply grease to the the
thread of the freewheel body fixing bolt, otherwise looseness or
sticking may occur.
Do not attempt to disassemble the freewheel body, because it
may result in a malfunction.
Freewheel body
fixing bolt
Freewheel body
Freewheel body washer
DURA-ACE grease
(Y-04110000)
Do not disassemble
the seal.
Applying grease
Tightening torque:
45 - 50 N·m {392 - 434 in. lbs.}
14 mm Allen key
Gear shifting operation
The INSTANT RELEASE mechanism makes fast releasing possible because cable tension is released immediately when a lever is
depressed. The levers are also equipped with 2-WAY RELEASE and MULTI RELEASE mechanisms so that you can now shift two gears
with a single operation, either by 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.
To shift from a small sprocket to a larger sprocket
(Lever A)
You can vary the lever stroke to shift the desired number of gears,
so that to shift by one gear only, move the lever to the (1) position,
and to shift by two gears at one time, move the lever to the (2)
position. A maximum two-gear shift can be made in this manner.
To shift from a large sprocket to a smaller sprocket
(Lever B)
You can vary the lever stroke to shift the desired number of gears,
so that to shift by one gear only, move the lever to the (1) position,
and to shift by two gears at one time, move the lever to the (2)
position. A maximum two-gear shift can be made in this manner.
Lever (A) initial position
Tightening torque:
3 N·m {27 in. lbs.}
4 mm Allen key
Use a handlebar grip with a maximum
outer diameter of 32 mm.
Installation of the shifting lever
(SL-M980-R)
Installation of the SL-M980-I and
the BL-M985/M988
■
Read these Service Instructions together with the
Service Instructions for the BR-M985 (SI-8J70A).
■
Refer to the Service Instructions for the Front Drive
System for details on replacing and installing the shifting
lever unit.
Lever (B)
• 2-WAY RELEASE • MULTI RELEASE
Tightening torque :
2.5 N·m {22 in. lbs.}
Shifting lever position is adjustable by
sliding to left or right.
• Install the shifting lever in a position where it will not obstruct brake
operation and gear shifting operation.
• Do not use in a combination which causes brake operation to be
obstructed.
Note:
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.
<CS-M980>
(bJ) 11 - 34T
(bk) 11 - 36T
<CS-M771-10>
(bL) 11 - 32T
Lock ring
Lock ring spacer
Sprocket spacer
Lock ring
Lock ring spacer
Sprocket spacer
Inner cable
Note:
The hub cone is made from a
light alloy. Use a suitable tool
which has no wear or other
damage when adjusting the
hub rotation.
3.
Use a 4 mm Allen key to
secure the shifting lever to the
brake lever.
Hook
Bolt (M5 x 12.5 mm)
Nut
1
2
Tightening torque:
3 N·m {27 in. lbs.}
1.
Use a 2 mm Allen key to open the
clamp band of the brake lever as
shown in the illustration.
2.
Insert the hook of the shifting lever
bracket into the hole in the brake
lever bracket, and then
provisionally tighten the special nut
and special bolt to install it to the
handlebar.
Push
Clamp band
1
2
Shifting lever
Brake levers
BL-M985 / M988
Other Brake lever models
SL-M980-I
OK
Not compatible
