• The HB-M976 front hub is not designed for downhill bicycle riding and
off-road bicycle riding. However, depending on the riding condition,
The hub axle could develop a crack, which may result in failure of the
hub axle. This can lead to an accident that could result in serious injury
or even death. Before riding, you should carefully check your hubs to
make sure that there are no cracks in the axles , and if you find any
sign of a crack or any other unusual condition, do NOT use the bicycle.
• The securing method and tightening torque for the front wheel both vary
depending on the type of front suspension fork being used. When
installing the front wheel to the front suspension fork, always be sure to
follow the directions given in the Service Instructions for the front
suspension fork. If the directions are not followed, the front wheel may fall
out of the front suspension fork and serious injury may result.
• Please use extra caution to keep your fingers away
from the rotating disc brake rotor during installing or
servicing the wheel. The rotor is sharp enough to
inflict severe injury to your fingers if caught within the
openings of moving rotor.
• The calipers and rotor will become hot when the brakes are operated, so
do not touch them while riding or immediately after dismounting from the
bicycle, otherwise you may get burned. Check that the brake components
have cooled down sufficiently before attempting to adjust the brakes.
• Always make sure that the front and rear brakes are working correctly
before you ride the bicycle.
• Be careful not to allow any oil or grease to get onto the rotor and brake
pads, otherwise the brakes may not work correctly.
• If any oil or grease do get on the pads, you should replace the pads. If
any oil or grease gets on the rotor, you should clean the rotor. If this is
not done, the brakes may not work correctly.
• If the quick release lever is on the same side as the rotor, there is the
danger that it may interfere with the rotor, so check that it does not
interfere.
• 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.
• 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.
• Read these Technical Service Instructions carefully, and keep them in a
safe place for later reference.
• Be sure to carefully read the Service Instructions for the disc brakes also.
• When using the special tool (TL-FC32) to remove and install the rotor
mounting ring, be careful not to touch the outside of the rotor with your
hands. Wear gloves to protect your hands from getting cut.
• Do not turn the rotor while the special tool (TL-FC32) is installed to it.
If the rotor becomes bent, the rotor and brake pad may interfere with
each other and generate noise. In addition, it may cause the braking
force to drop.
■ Burn-in period
• Disc brakes have a burn-in period, and the braking force will gradually
increase as the burn-in period progresses. Make sure that you are aware
of any such increases in braking force when using the brakes during the
burn-in period. The same thing will happen when the brake pads or rotor
are replaced.
Note
• If the brake caliper mounting boss and the dropout are not parallel, the
rotor and caliper may touch.
• If the rotor is worn, cracked or warped, it should be replaced.
• Parts are not guaranteed against natural wear or deterioration resulting
from normal use.
• For maximum performance we highly recommend Shimano lubricants
and maintenance products.
<Assembly>
Install the axle pipe, and then use the special tools (TL-HS23 and TL-FC31) to
tighten the lock nut so as to double-lock the mechanism as shown in the
illustration.
Use the TL-HB80 to adjust the hub rotation performance.
General Safety Information
WARNING
CAUTION
Please note: specifications are subject to change for improvement without notice. (English) © Sep. 2008 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
Technical Service Instructions SI-26H0A-001
HB-M976
BR-M975
ST-M975 / BL-M975
SM-RT97
Resin Pads
Metal Pads
M07Ti
M06Ti
Series
Caliper
Brake Lever
Rotor
Brake pad unit
XTR
In order to realize the best performance, we recommend that the following
combination be used.
Model No.
Front hub
No. of spoke holes
Specifications
Maintenance
HB-M976
36 / 32
These units can be disassembled as shown in the illustrations. Grease should be applied to each
part at periodic intervals.
TL-FC31
TL-HS23
Axle pipe
Tighten
Rotor fixing lock ring
TL-FC32
Check that the spokes have been
laced as shown in the illustration.
A radial assembly cannot be used.
When using the special tool (TL-FC32) to remove and install the rotor
mounting ring, be careful not to touch the outside of the rotor with your hands.
Wear gloves to protect your hands from getting cut.
Wheel spoke lacing
Rotating direction of wheel
Front left Front right
Note:
The cover on the right side of the
hub unit cannot be disassembled.
Applying grease
DURA-ACE grease
(Y-04110000)
Tightening torque:
40 N·m {350 in. lbs.}
Tightening torque:
30 - 35 N·m {261 - 305 in. lbs.}
CAUTION
Installation of the rotor
SI-26H0A-001-00
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