Shimano SL-R770 - TECHNICAL,SL-R770 Service Instructions Manual
Technical Service Instructions SI-6KL0A-001
SL-R770
Shifting lever
In order to realize the best performance, we recommend that the
following combination be used.
Shifting lever
SL-R770
Outer casing
SP41
Gears
20
Front derailleur
FD-R770
Front chainwheel
FC-7800 / FC-6600 / FC-5600
Rear derailleur
RD-7800 / RD-6600 / RD-5600
Freehub
FH-7800 / FH-6600 / FH-5600
Cassette sprocket
CS-7800 / CS-6600 / CS-5600
Chain
CN-7801 / CN-6600 / CN-5600
Bottom bracket cable guide
SM-SP17
Shifting lever
SL-R770
Outer casing
SP41
Gears
30
Front derailleur
FD-R773-2 : for FC-7803 / 6603
(52T top chainring)
FD-R773-0 : for FC-5603
(50T top chainring)
Front chainwheel
FC-7803 / FC-6603 / FC-5603
Rear derailleur
RD-7800 / RD-6600 / RD-5600
Freehub
FH-7800 / FH-6600 / FH-5600
Cassette sprocket
CS-7800 / CS-6600 / CS-5600
Chain
CN-7801 / CN-6600 / CN-5600
Bottom bracket cable guide
SM-SP17
Mounting the shifting 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 chainring to a larger chainring
When lever (A) is pressed once, there is a shift of one step from
a small chainring to a larger chainring.
Example:
from intermediate chainring
to largest chainring.
Use a handlebar grip with a maximum outer diameter of 32 mm.
Gear shifting operation
< Front >
Lever (A) initial position
To shift from a large chainring to a smaller chainring
When lever (B) is pressed once, there is a shift of one step from
a large chainring to a smaller chainring.
Example:
from largest chainring
to intermediate chainring.
Lever (B)
When lever (B) is operated, there is one click where trimming
(the noise prevention mechanism) engages, and a second
stronger click when the gear shift stroke is completed. After
trimming, the next push will complete the gear shift stroke.
Trimming (noise prevention operation)
If the chain is on the large front chainwheel and the larger rear
sprocket, the chain will rub in the front derailleur plate,
producing a characteristic noise. When this happens, press
lever (B) lightly (to the point where it clicks); this causes the
front derailleur to move slightly towards the smaller chainwheel,
thereby eliminating the noise.
Gear shift
complete stroke
Click
Trim operation
Click
Lever (B)
Movement of the front
derailleur
Chain position
To shift from a small sprocket to a larger sprocket
To shift one step only, press lever (A) to the ➀position.
To shift two steps at one time,
press to the
➁
position.
A maximum three-step shift can
be made in this manner.
< Rear >
Lever (A) initial position
➀
: Shifts one sprocket
E.x. : from 3rd to 4t
➁
: Quick-shifts two sprockets
E.x. : from 3rd to 5th
➂
: Quick-shifts three sprockets
E.x. : from 3rd to 6th
4 3
35
3
6
Installing the shifting cable
To shift from a large sprocket to a smaller sprocket
Press lever (B) once to shift one step
from a larger to a smaller sprocket.
Lever (B)
E.x. : from 4th to 3rd
34
Replacement of the shifting lever unit and indicator
Removal of the indicator
Disassembly and reassembly should only be carried out when
replacing the indicator.
1. Remove the two indicator set screws which are securing the
indicator.
2. Remove the indicator unit as
shown in the illustration.
3. Operate lever (B) two times or
more to set the lever to the lowest
position.
4. After checking that the indicator needle
is at the right edge, install the indicator
as shown in the illustration.
5. Check the operation of the indicator. If it does not operate
correctly, re-install the indicator by while taking particular note of
steps 3. and 4.
< Front >
Removal of the indicator
Disassembly and reassembly should only be carried out when
replacing the indicator.
1. Remove the two indicator set screws which are securing the
indicator.
2. Remove the indicator unit as
shown in the illustration.
3. Operate lever (B) at least nine
times to set the lever to the
highest position.
4. After checking that the indicator needle
is at the left edge, install the indicator
as shown in the illustration.
5. Check the operation of the indicator. If it does not operate
correctly, re-install the indicator by while taking particular note of
steps 3. and 4.
< Rear >
Tightening torque : 0.3 - 0.5 N·m {3 - 4 in. lbs.}
Tightening torque : 0.3 - 0.5 N·m {3 - 4 in. lbs.}
Indicator set screws
Indicator
Lever (B)
Indicator set screws
Lever (B)
Indicator
Replacement of the shifting lever unit
Disassembly and reassembly should only be carried out when
replacing the shifting lever unit.
1. Loosen the cable fixing bolt (nut) of the front derailleur, and then
pull the inner cable out of the shifting lever unit in the same way
as when installing the inner cable.
2. Carry out steps 1 - 2 for
replacement of the indicator.
3. Remove the three shifting lever
mounting screws, and then
remove the shifting lever unit as
shown in the illustration.
Tightening torque :
0.5 - 0.8 N·m {4 - 7 in. lbs.}
Shifting lever mounting screws
Replacement of the shifting lever unit
Disassembly and reassembly should only be carried out when
replacing the shifting lever unit.
1. Loosen the cable fixing bolt (nut) of the rear derailleur, and then
pull the inner cable out of the shifting lever unit in the same way
as when installing the inner cable.
2. Carry out steps 1 - 2 for
replacement of the indicator.
3. Remove the three shifting lever
mounting screws, and then
remove the shifting lever unit as
shown in the illustration.
Tightening torque :
0.5 - 0.8 N·m {4 - 7 in. lbs.}
Shifting lever mounting screws
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
Installing the inner cable < Front >
Operate lever (B) two times or more,
and check on the indicator that the
lever is at the lowest position.Then
remove the inner hole cover and
connect the inner cable.
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.
Lever (B)
Inner hole cover
Inner cable
Inner hole cover
Tightening torque:
5 - 7 N·m {44 - 60 in. lbs.}
Tightening torque:
0.3 - 0.5 N·m {3 - 4 in. lbs.}
Installing the inner cable < Rear >
Operate lever (B) nine times or more,
and check on the indicator
that the lever is at the highest position.
Then remove the inner hole cover and
connect the inner cable.
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.
Lever (B)
Inner hole cover
Inner cable
Inner hole cover
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
Tightening torque :
0.3 - 0.5 N·m {3 - 4 in. lbs.}
General Safety Information
WARNING
• Obtain and read the service instructions carefully prior to installing
the parts.
Loose, worn, or damaged parts may cause injury to the rider. 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
• For smooth operation, use the specified outer casing and bottom
bracket cable guide.
• Grease the inner cable and the inside of the outer casing before use
to ensure that they slide properly.
• 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.
• Operation of the levers related to gear shifting should be made only
when the front chainwheel is turning.
• 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 (SIS-SP41). Do
not use DURA-ACE grease or other types of grease, otherwise they
may cause deterioration in gear shifting performance.
• 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.
These service instructions are printed on recycled paper.
Please note: specifications are subject to change for improvement without notice.(English)
© Apr. 2007 by Shimano Inc. XBC SZK Printed in Japan.
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
Tightening torque :
5 N·m {44 in. lbs.}
< Front > < Rear >
5 mm Allen key 5 mm Allen key
4. To assemble, align the shifting lever unit and the bracket and then
secure the shifting lever mounting screws.
5. Carry out steps 3 - 4 for replacement of the indicator.
4. To assemble, align the shifting lever unit and the bracket and then
secure the shifting lever mounting screws.
5. Carry out steps 3 - 4 for replacement of the indicator.
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.
• 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.
• In the case of carbon handlebars, it may be necessary to lower the
tightening torque in order to prevent damage to the handlebar.
Please consult the bicycle or handlebar manufacturer regarding
the appropriate level of tightening torque for carbon handlebars.
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