SW-7970
SI-7DJ0A-002-00
General Safety Information
Technical Service Instructions
WARNING
• When the shifting switch is operated, the motor which drives the
front derailleur will operate without stopping at the shifting lever
position. Always be sure to remove the battery before carrying out
installation and adjustment, otherwise your fingers may become
stuck.
• Install in a place where it will not obstruct the operation of the brake
lever.
• 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.
• Use the ST-7970 with the BR-7900. Do not use the BR-7900 in
combination with previous STI levers for road riding or with the BLR770/ BL-R550 brake levers for flat handlebars, otherwise the
braking performance provided will be much too strong.
• Read these Technical Service Instructions carefully, and keep them
in a safe place for later reference.
Note
• RD-7970: Be sure to adjust the top adjustment bolt and the low
adjustment bolt by following the procedures in the Service
Instructions. If these bolts are not adjusted, the chain may
become clamped between the spokes and the large sprocket and
the wheel may lock, or the chain may slip onto the small sprocket.
• Operation of the levers related to gear shifting should be made only
when the front chainwheel is turning.
• Always be sure to use the TL-EW01 special tool to remove the cable.
• Be careful not to let water get into the terminal.
• Do not disassemble, otherwise problems may occur.
• When routing the electric cable, make sure that it does not interfere
with the operation of the brake lever.
• 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.
SI-7DJ0A-002
■ If there is a bracket for the cycle computer
Gear shifting operation
1. Make a mark as a guide to the switch
■ Rear shifting switch operation
SW-7970
mounting position, and then attach
rubber sheet C. At this time, make sure
that you attach rubber sheet C so that
it is facing in the correct direction.
< Shifting switch (X) >
Optional shifting switch for drop handlebars
The chain moves from a small
sprocket to a larger sprocket each
time the switch is operated.
C
< Shifting switch (Y) >
In order to realize the best performance, we recommend that the
following combination be used.
DURA-ACE
Series
2. Install the bracket for the cycle
computer.
The chain moves from a large
sprocket to a smaller sprocket each
time the switch is operated.
SW-7970
Optional shifting switch
ST-7970
Dual control lever
SM-EW79A-E
Electric cable
SM-BTR1 / SM-BCR1
Battery / Battery charger
20
Gears
FD-7970
Front derailleur
Front chainwheel
FC-7900
Rear derailleur
RD-7970
If using the checker (SM-EC79) to shift the ST-7970 shifting switch up or
down, the shifting switch of the SW-7970 will also shift up or down.
* When connected to the left dual control lever, the front derailleur can be
operated, but the layout and shape of the switch buttons are designed so
that they can be operated with your right thumb, so we cannot
recommend this combination.
3. Install the switch so that it crosses
over the band as shown in the
illustration. Refer to installation
steps 3 to 5 in “If there is no
bracket for the cycle computer” for
the method of securing using the
cable tie.
FH-7900
Freehub
CS-7900 (Except for 11-28T)
Cassette sprocket
Chain
CN-7901
Caliper brake
BR-7900
Note:
Installation to the handlebars
• Do not secure the cable with the cable tie or the bracket for the cycle
computer. Use handlebar tape to secure the cable.
• Move the bracket for the cycle computer approximately 9mm to the right
so that it is not against the stem.
■ If there is no bracket for the cycle computer
1. Mark the position for installing the
switch.
■ Components
Refer to the Service Instructions for the electric cable
(SM-EW79A-E) for details on connecting the cable connectors
and routing the cable.
SW-7970
■ Example of cable connections
(for reference)
2. Attach rubber sheets A and B. At this
Rubber sheet
time, make sure that A and B are
attached in the correct positions at left
and right.
A
B
A
C
Cable tie
B
ST-7970 (R)
3. Pass a cable tie through the large
square hole in the switch.
There may be times when we need to send out important
information regarding our products, so we recommend that you
register your product by entering the
product serial number on our website.
http://www.shimano.com
Switch unit
■ Routing Map
Names and locations of each part
SW-7970
ST-7970
4. Secure the switch to the handlebars
with the cable tie, and use pliers to cut
off any excess length of cable tie.
Do not secure the cable with the cable
tie as well at this time.
SM-EW79A-E
d To derailleur
Junction A
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 IZM Printed in Japan.
• When routing the electric cable to junction (A), allow enough looseness in
the cable so that the ST-7970 / SW-7970 installation position can be
adjusted and so that the handlebars can be turned fully to the left and
right. When routing the electric cable to junction (A), the cable can be laid
underneath the handlebar tape when it is wound onto the handlebars.
• Refer ST-7970 service instructions for button indicator operations.
Be sure to attach dummy plugs
to any unused terminals using
the TL-EW01.
5. Turn the cable tie so that the square
part goes into the square hole in the
switch.
Dummy plug
SI-7DE0A-003-00
Technical Service Instructions
SI-7DE0A-003
EW-7970
Installation of the battery bracket
Position the battery bracket.
Use the bottle cage mounting bolt to provisionally install the battery
bracket to the bottom of the bottle cage.
(SM-EWC1 : Code cover)
Electric Cables (External Specifications)
Connection of the electric cables
Insert the connector coming from junction (A) into the connector coming
from junction (B) so that the triangular marks (d) on the connectors are
aligned with each other. Push the connectors together until they connect
with a click. Because of the waterproof structure of the connectors, they do
not fit together rigidly. Be sure to push them together until they connect
with a click.
Connector from EW-7970
junction (B)
Note
• Secure the cables to the frame so that they will not caught by the tire or
any other parts while pedaling.
• Always be sure to use the TL-EW01 special tool to remove the cable.
• Be careful not to let water get into the terminal.
• The adhesive strength of the cable cover fixing tape is fairly weak so that
the paint on the frame will not come off together with the tape when the
tape is peeled off at times such as when replacing the cable. Once the
tape has come off, replace it with new tape.
Connector from SM-EW79A junction (A)
Once the electric cable has been
routed, secure junction (B) to the
bottom of the bottom bracket shell
with a bolt (length 10.5 mm or 15
mm).
■ Components
•
•
•
•
Length adjustment examples (Junction B)
Junction B
Connectors : 3 places (Front derailleur/rear derailleur/junction)
Battery bracket
Junction cable length : 3 types (770/830/890 mm)
Leave a space of 108 mm or more at the end of the battery bracket.
Check that the battery can be inserted and removed while the bottle cage
is installed. Secure the battery bracket with using 2.5mm allen key.
Connect the electric cable connectors to the terminals of the derailleurs.
Insert the connectors so that the triangular marks (d) on the connectors
and the derailleur terminals are aligned with each other.
Because of the waterproof structure of the connectors and terminals, they
do not fit together rigidly. Be sure to push them together until they connect
with a click.
For rear derailleur
Next, install the cable cover to the
frame. In order to make sure that the
cable cover is securely installed,
clean the frame with alcohol or some
other cleaning agent to remove any
grease or other substances before
installing the cable cover. Place the
cable cover over the electric cable,
and then attach the cable cover to the
frame.
Tightening torque:
1.2 - 1.5 N·m {10.4 - 13 in. lbs.}
Junction cable
Junction B
Tightening torque:
1.5 - 2.0 N·m {13 - 18 in. lbs.}
<Battery installation and removal>
Open the clamp, and then install the battery so that it follows the groove in
the battery bracket. Close the clamp until it clicks into place.
Accessories
• Cable cover (black) length : 2 types
Long x3 (For Chainstay / Down tube)
Short x3 (For Battery / Rear derailleur / Front derailleur)
• M5 bolt L=10.5 mm, L=15 mm
• Cable tie
For front derailleur
■ Routing Map
Names and locations of each part
Junction A
<Removal of the connectors>
Left lever
Front derailleur
Bottle cage
Open the clamp, pull out the battery slightly, and then press the button to
fully remove the battery.
Right lever
Routing of the electric cables
Battery bracket
Rear derailleur
Provisionally attach the electric cables to the frame with tape.
Junction B
• When routing the electric cable to
the rear derailleur, be sure to install
it to the bottom of the chainstay to
avoid any interference between the
cable and the chain.
Clealance
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. 2009 by Shimano Inc. XBC IZM Printed in Japan.
• Wind any excess length of electric
cable inside junction (B) to adjust
the length. Up to a maximum of 120
mm of excess cable can be wound
in this way.
Tighten the bolt of the bottle cage
to secure the battery bracket. Use
the accessory cable tie to secure
the battery bracket to the frame.
Cable tie
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