Page 1
Technical Service Instructions SI-0120A-003
Maintenance
RD-M985
Replacement of the pulley
Friction adjustment Applying grease to the chain stabilizer
Replacement of the plate and the
plate tension spring
General Safety Information
• If operating the lever switch while the
plate unit cover is removed, press
the switch stabilizer with your finger
so that it does not fly out.
OFF
Switch stabilizer
ON
• If you move the lever switch from OFF to ON while the switch
stabilizer is removed, it may damage the product.
• Be sure to install the plate unit cover before riding the bicycle.
OFF
ON ON
OFF
Switch stabilizer
* Move the lever switch to the OFF position before
carrying out maintenance.
Note:
When removing the
tension pulley in
order to replace the
rear derailleur,
remove the E-ring
first.
Guide pulley / Tension pulley
Tightening torque :
2.5 - 5.0 N·m {22 - 44 in. lbs.}
3 mm Allen key
Guide pulley
Tension pulley
E-ring
1. Remove the plate stopper pin.
• Phillips screwdriver #2
2. Turn the plate to loosen the plate tension
spring as shown in the illustration.
< Disassembly >
Tightening torque :
1 N·m {9 in. lbs.}
Plate stopper pin
3. Remove the plate unit cover bolt.
4. Remove the switch stabilizer.
5. Remove the chain stabilizer.
6. Use a 4 mm Allen key to remove the
plate axle.
Tightening torque :
1 - 1.5 N·m {9 - 13 in. lbs.}
Tightening torque :
8 - 10 N·m {70 - 86 in. lbs.}
Switch stabilizer
Chain stabilizer
Plate axle
• 2 mm Allen key
Note:
When reassembling, insert the end
of the plate tension spring into the
groove in the plate.
Reassemble by carrying out the disassembly procedure in reverse.
Reassemble by carrying out the disassembly procedure in reverse.
Be sure to install the switch
stabilizer. If you try to operate
the lever switch without the
switch stabilizer installed, it
will damage the product.
< Assembly >
Plate axle
Plate tension spring
When installing and removing the plate and the plate unit, be careful
to avoid injury such as getting your fingers caught by the strong
reaction force of the plate tension spring.
• When installing and removing the plate and the plate unit, be
careful to avoid injury such as getting your fingers caught by
the strong reaction force of the plate tension spring.
The friction amount can be adjusted as desired.
Furthermore, you can also adjust after a change of the
friction occurs during use.
2. Remove the plate unit cover.
3. Remove the switch stabilizer.
4. Move the friction adjustment bolt to adjust the friction.
* The switch stabilizer can be
used as a tool to carry out
the adjustment.
1. Set the lever switch
to OFF.
Plate unit cover
Friction adjustment bolt
Switch stabilizer
Lever switch
Chain stabilizer
Clutch
Friction spring
Friction
increases
Friction
decreases
5. Check the friction torque.
• Securely install the switch stabilizer as shown in Figure 1.
• While pressing the switch stabilizer with your finger as shown in
Figure 2, set the lever switch to the ON position and check the
friction torque.
* If adjusting the friction once more, be sure to set the lever
switch to the OFF position while pressing the switch stabilizer
with your finger before making the adjustment.
6. Check that the switch stabilizer is securely installed.
7. Install the plate unit cover.
Friction torque:
3.5 - 5.4 N·m {30 - 47 in. lbs.}
Tightening torque:
1 - 1.5 N·m {9 - 13 in. lbs.}
Switch stabilizer
4 mm Allen key
Figure 2
Figure 1
1. After carrying out steps
1, 2 and 3 in “Friction
adjustment”, remove the
chain stabilizer.
2. Use a flat-tipped screwdriver or similar tool to separate the
friction spring and the clutch. Be careful not to bend the friction
spring with the tip of the flat-tipped screwdriver at this time.
3. Apply grease to the clutch.
Make sure that no grease gets inside the clutch at
this time. If grease gets inside the clutch,
it will cause the clutch to malfunction.
Grease number: Y04120800
SI-0120A-003-00
Be sure to wear safety glasses or goggles to
protect your eyes while working.
WARNING
CAUTION
CAUTION
* Service Instructions in further languages are available at :
http://techdocs.shimano.com
Please note: specifications are subject to change for improvement without notice. (English)
© Feb. 2012 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
CAUTION
If the friction changes or noise is generated, the grease
may have become discolored or may have disappeared.
Apply more grease.
Loading...