Shimano ST-M950 Shifting/Brake Lever Service Instructions
Shimano BL-M950: Enhance your mountain biking experience with a high-performance brake system designed for racing. Its adjustable pitch allows for customized braking force, providing ample power with minimal lever movement. Conquer challenging trails with confidence, knowing you have precise control over your braking capabilities.
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/\ WARNING
It is important to completely understand the operation of your
bicycle's brake system. Improper use of your bicycle's brake system
may result in a loss of control or an accident, which could lead to
severe injury. Because each bicycle may handle differently, be sure
to learn the proper braking technique (including brake lever pres-
sure and bicycle control characteristics) and operation of your
bicycle. This can be done by consulting your professional bicycle
dealer and the bicycle's owners manual, and by practicing your
riding and braking technique.
The M3950 brake system is equipped with a race-standard pitch
adjusting screw in the wire hooking unit of the ST-M950/BL-M950
brake lever. This pitch adjusting screw was developed specifically
for racing. If it is turned clockwise, the braking force will be dramati-
cally increased, so that a high level of braking performance can be
achieved from only a small amount of lever movement. Accordingly,
normal braking operation may cause a greater-than-expected
amount of braking force to be applied, which could make the bi-
cycle fall forward, causing serious injury to the rider. To avoid this,
please read the following instructions thoroughly before changing
the setting of the pitch adjusting screw.
Do not remove the pitch fixing block for nor-
mal road riding.
The bicycle might fall forward if you have to apply the brakes sud-
denly, such as when a vehicle appears
1) With the pitch fixing block in place (standard
specifications for shipment)
This is the standard configuration for mountain bike racing.
Pitch adjusting screw
Pitch fixing block
2) With the pitch fixing block removed and the pitch
adjusting screw tightened to the position in the il-
lustration
An ample degree of braking force can be obtained from a small
amount of brake lever input, to provide a high level of racing
brake performance. However, if the brakes are operated sud-
denly, there is the danger that the bicycle may fall forward. After
removing the pitch fixing block and turning the pitch adjusting
screw clockwise, first ride the bicycle at a speed of less than 6
mph (10 km/h) while applying the brakes repeatedly in order to
get a feel for the difference in braking characteristics before
riding at higher speeds. Beginners should be particularly care-
\
3) With the pitch adjusting screw fully tightened
An ample degree of braking force can be obtained from an even
smaller amount of brake lever input than in 2) above, to provide
the highest level of racing brake performance. However, be-
cause the braking force is even more sensitive to the amount of
lever input than in 2), be sure to practice using the brakes as
described above. Beginners or those who are not fully confident
should not use the brakes in this configuration.
Pitch adjusting screw
o Use the BR-M950 brake arch with SERVO
WAVE ACTION adjustable V-brake levers such
as the BL-M950/ST-M950/BL-M739/ST-M739
brake levers.
$
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SERVICE INSTRUCTIONS
Multi-Condition
Brake System
Before use, read these instructions carefully, and follow them for correct use.
SI-B360C
Muiti-Condition Brake System
By providing superior wet weather braking performance (control
conditions when using this brake system.
and modulation), braking performance will not vary in a multitude of
In order to realize the best performance, we recommend that the fol-
lowing combination be used.
Series XTR
Brake lever ST-M950 / BL-M950
V-brake BR-M950
Brake cable PA I ===
NOTE:
* By using these parts as a set, the optimum efficiency of the Multi-
Condition Brake System can be realized
e For any questions regarding methods of handling or maintenance,
please contact the place of purchase.
Installation of the brake lever
Move lever (A) so that the clamp bolt can be seen, and then use a
mm Allen key to install the brake lever.
4 mm Allen key
3 SN
Tightening torque:
6 — 8 Nm {52 — 69 in. Ibs.}
Use a handlebar grip with a
maximum outer diameter of
32 mm
Installation of the V-brake
1 Insert the stopper pin of the brake body into the center spring hole
"in the frame mounting boss, and then secure the brake body to the
frame with the link fixing bolt
5 mm Allen key
Washer
Link fixing boll
Spring hole
Tightening torque:
| | 5—7 Nm (43 - 61 in. Ibs.)
o
2 While holding the shoe against the rim, adjust the amount of shoe
protrusion by changing over the washer B (6 mm or 3 mm) so that
dimension A is kept at 39 mm or more,
| 39 mm or more |
V + U в
|
с
\
Ä
NG
3 mm washer B
Shoe fixing nut
ave
Washer À
Washer A
Shoe fixing link
3 While holding the shoe against the rim, tighten the shoe fixing nut.
Tightening torque:
6 - 8 Nm {52 — 69 in. Ibs.}
5 mm Allen key
4 Pass the inner cable through the inner cable lead, and after setting
so that the total of the clearances between the left and right shoes
and the rim is 2 mm, tighten the cable fixing bolt.
| + Tightening torque:
Г 6 — 8 Nm {52 — 69 in. Ibs.}
| 5 mm Allen key
(me cable lead
Ne
NN
. 5 Adjust the balance with the spring tension adjustment screws.
Spring tension
adjustment screw
Spring tension
adjustment screw
6 Depress the brake lever about 10 times as far as the grip and
" check that everything is operating correctly and that the shoe
clearance is correct before using the brakes.
Depress about
10 times
Replacement of the cartridge shoe
1 Remove the shoe fixing pin.
[oe fixing pin
3 There are two different types of shoe and shoe holder to be used
in the left and right positions respectively. Slide the new shoes into
the grooves on the shoe holders while taking note of the correct
directions and pin hole positions
| Fortheleft | |
| Same at front and rear | Same at front and rear J
Front
Shoe Shoe
For the right |
Shoe N ge van
==} | bi
Shoe
insertion
direction
UC
Shoe fixing pin
Shoe fixing pin
Insertion of shoe fixing pin is very critical to keep shoe properly
* fixed in place.
Please nole: Specifications are subject to change for improvement wilhout notice. (English)
S LJ | m A n О These service instructions are
& printed on recycled paper and
can be recycled again
SHIMAND AMERICAN CORPORATION
One Shmano Drive. PO Box 19615. Irvine, Calilornma U.S A 92713-8615 Phone 714:951-5003
SHIMANO EUROPA
Indusireweg 24 NL-8071 CT Nunspeel, Holland Phona 31-3412-72222
SHIMANO INC.
3-77 Omatsucho. Sakai Osaka Japan Phone 0722-23 3243
© Jun 1996 by Shimano Inc. PIT IZM Printed (in Japan
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