Shimano ST-CT50 Shifting Lever Service Instructions

SERVICE INSTRUCTIONS SI-F111C
Front Drive System
Before use, read these instructions carefully, and follow them for correcl
use.
In order to realize the best performance, we recommend that
the following combination be used.
Type Shifting lever Le de ur Front chainwheel
ST-CT50
SIS SL-CT50 FD-CT50 ee
SL-TY31 SIS pp yap
Friction mode SL-TY30 FC-TY20
Bottom bracket Chain Bottom bracket cable guide
BB-CS11 CN-UG50 SM-SP16 / SM-SP15
Specifications
Shifting lever
ST-CT50 SL-CT50 / SL-TY31 / SL-TY30
Front chainwheel Triple Triple
Type Uni-lever Thumb shifter
Front Derailleur Siroke A A
Type Normal type | E, |
A|
Capacity 28.6 mm I |
Chainsta A
Stroke (A-A") 38 - 54 angle y A
Chainstay angle (a) 66° - 69° LY
Chainwheel
Material Steel
Chainwheel tooth combination 481T-381T-28T
Crank arm length 170 mm
Pedal thread dimensions BC 9/16" X 20 T.P.I. (English thread)
Bottom bracket cup thread BC 9/16" X 20 T.P.l. (English thread)
dimensions BC 1.37" X 24 T.P.l. (68, 73mm),
Bottom Bracket
PF x | Stamped
Type ¡Chain line| Spindle length | Shell width markin q
68 D-NL | BC 1.37" X 24 T.P.k
Triple| 47.5 mm | 122.5 mm 70 | D-NL | M36X 24 T.P.l.
| 73 | D-NL |BC1.37" X24 TPL
Note
* The installation and operation methods are the same as before when
a thumb shifter was used.
* For smooth operation, always be sure to use the specified outer
casing and the bottom bracket cable guide.
e This front derailleur is for triple front chainwheel use only. It cannot
be used with the double front chainwheel, as the shifting points do
not match.
* For the chain, be sure to use only the Shimano narrow type chain.
The wide type chain cannot be used,
* 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.
S Ll | mM A mn O р These service inslruclions is printed on
recycled paper and can be recycled again
SUHIMAND AMERICAN CORPORATION
Des Has Fa PIO Pa PANA ый LE SAA MAA E a AA A
SHIMAND EUROPA SHIMAND inc
Please note: specilicalions ame subject fo change for improvament without notlog, [Enpghsh)
© May. 1905 by Stumano Inc. XBC-S2K Printed in Singapore
Installation of the bottom bracket Chain length
Add 2 links
(with chain tightened)
Install using the special tool Chainwheel
TL-UN72. First install the
main body, then the adapter.
чина >
a =
~~ Tightening torque: ] |
(“50-70 Nm |
\__ {435 - 608 in. Ibs.}
Main body Adaptar
Installation of the front chainwheel
1. Use the cotterlesscrank
extractor (TL-FC10) to install
the front chainwheel.
/ Tightening torque: -
35 - 50 Nm
(305 - 435 in. Ibs.}
Securety tighten J
Installation of the front derailleur
1. Adjust and then install the front derailleur as shown in the
illustration. Do not remove the Pro-Set alignment block at this
time.
| Gear teeth should
come within this range
Pro:Sol gauigo
Pro-Sel
alignment block
Chainwheel
(largest chainring)
2. The level section of the chain guide Bu
outer plate should be directly above
and parallel to the largest chainring.
3. Secure using a 9mm spanner.
== Chain guide
( 5-7 Ne So a) )
—
Installation of the lever
Install using a “+” screwdriverora — Uni-lever (ST-CT50)
T wrench. fe
Use a handlebar with an outside | —— 7 La station doi
diameter of 22.2mm. (
—) =
"О Tightening torque: > 7
UU 25-3Nm{22-26in.lbs} >
Note:Install the shifting lever so that it
does not contact the brake lever body
when it is moved to shift the chain from
the smallest chainring to the largest
chainring.
Thumb shifter
(SL-CT50
SL-TY31 / SL-TY30)
— 3 = on]
THs
Lover body — Al 7 =
Should not touch Е
installation bolt Shilling lever
Largest sprockel
Largest sprockel
SIS adjustment
Be sure to follow the sequence described below.
VE
Low adjustment Boo Bit mn indi
First remove the Pro-Set alignment block.
Next, set so that the clearance between AEE
the chain guide inner plate and the chain wm LC
is 0-0.5mm. | LE d
Chain position
Smallesl chainring
Chain guide
innor plato
Chain
. Connection and securing of cable
Push the lever in direction (2) 2
times or more to set the lever
to the lowest position, and then
connect the inner cable. ‘ e
Tightening torque: Y — у
5-7Nm
{44-60in. lbs}
While firmly pulling the cable, tighten the fixing bolt with a 9mm
spanner to secure the cable.
Uni-lever (ST-CT50)
. Top adjustment
Set so that the clearance between the chain guide outer plate
and the chain is 0-0.5 mm.
Coins) KR)
Smallest sprocket Largesl chainring
- Chain guide
oulor plata
E]
E Chain
. Adjustment of cable tension
After taking up the initial slack in the cable,
reattach to the front derailleur as shown in
the illustration.
When carrying out adjustment, set the
chain to the largest sprocket, and at the у
front, set the chain to the intermediate Pull
chainring.
Adjust using the outer casing adjustment barrel so that the
clearance between the chain guide inner plate and the chain is
0-0.5mm.
Largest chainring
Ой
Chain guide
Chain position inner plato
Intermediale
Larges! sprocket chainring
Uni-lever (ST-CT50) Thumb shifter
(SL-CT50 / SL-TY31 / SL-TY30)
Quter casing agjuslmenl
barrel
== — E
—_— o
qd
Quler casing
adjuslmenl barrel
5. Troubleshooting chart
After completion of steps 1 - 4, move the shifting lever to check
the shifting. (This also applies if shifting becomes difficult during
use.)
Tighten the top adjustment screw
clockwise {about 1/4 turn).
If the chain falls to the crank side
Loosen the top adjustment screw
counterclockwise (about 1/8 turn).
If shifting is difficult from the
intermediate chainring to the largest
chainring
If shifting is difficult from the
intermediate chainring to the smallest
chainring
Loosen the low adjustment screw
counterclockwise (about 1/4 turn).
If there is interference between the
chain and the front derailleur inner
plate at the largest chainring
Tighten the top adjustment screw
clockwise (about 1/8 turn).
Loosen the top adjustment screw
counterclockwise (about 1/8 turn).
If there is interference between the
chain and the front derailleur outer
plate at the largest chainring
Loosen the outer casing |
adjustment barrel
counterclockwise (1 or 2 turns).
If the intermediate chainring is
skipped when shifting from the
largest chainring
Tighten the outer casing
adjustment barrel clockwise (1 or
2 turns).
If there is interference between the
chain and front derailleur inner plate
when the rear sprocket is shifted to
the largest sprocket when the
chainwheel is at the intermediate
chainring position.
Tighten the low adjustment screw |
If the chain falls to the bottom bracket
side clockwise (about 1/2 turn).
Front Lever operation (ST-CT50)
The Uni-lever always returns to the initial position when it is
released after shifting.
When operating the levers, always be sure to turn the crank arm at
the same time.
To shift from a large chainring to a smaller chainring
Move the lever as far as possible to the inside
(direction 2).
To shift from a small chainring to a larger chainring
Move the lever toward the outside (direction (1D).