RD-C505

RD-C505
Technical Service Instructions
SI-5VC0A
RD-C505
Rear Derailleur
General Safety Information
WARNING
• 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.
• Use neutral detergent to clean the chain. Do not use alkali-based or acid based
detergent such as rust cleaners as it may result in damage and/or failure of the chain.
• Use the reinforced connecting pin only for connecting the narrow type of chain.
• There are two different types of reinforced connecting pin available. Be sure to check
the table below before selecting which pin to use. If connecting pins other than
reinforced connecting pins are used, or if a reinforced connecting pin or tool which is
not suitable for the type of chain is used, sufficient connection force may not be
obtained, which could cause the chain to break or fall off.
Chain
9-speed super narrow chain
such as
CN-7701 / CN-HG93
8- / 7- / 6-speed narrow
chain such as
CN-HG50 / CN-IG51
Reinforced
connecting pin
Chain tool
Silver
TL-CN31/TL-CN22
Black
TL-CN31/TL-CN22 and
TL-CN30/TL-CN21
6.5mm
7.1mm
• If it is necessary to adjust the length of the chain due to a change in the number of
sprocket teeth, make the cut at some other place than the place where the chain has
been joined using a reinforced connecting pin or an end pin. The chain will be
damaged if it is cut at a place where it has been joined with a reinforced connecting
pin or an end pin.
End Pin
Link Pin
Reinforced
Connecting Pin
RA-A
E
C
DU
• Check that the tension of the chain is correct and that the chain is not damaged. If the
tension is too weak or the chain is damaged, the chain should be replaced. If this is
not done, the chain may break and you may fall off the bicycle.
• Obtain and read the service instructions carefully prior to installing the parts. Loose,
worn, or damaged parts may cause injury to the rider.
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.
Note
Low adjustment for the rear derailleur is carried out differently from previous
rear derailleurs. Be sure to read the low adjustment procedure carefully
before making the adjustment.
• Be sure to use a 9-speed super narrow chain.
• Adjust the RD-C505 low normal rear derailleur (reverse spring type) from the low side.
• If gear shifting operations do not feel smooth, wash the derailleur and lubricate all
moving parts.
• If the amount of looseness in the links is so great that adjustment is not possible, you
should replace the derailleur.
• You should periodically clean the derailleur and lubricate all moving parts (mechanism
and pulleys).
• If gear shifting adjustment cannot be carried out, check the degree of parallelism at the
rear end of the bicycle. Also check if the cable is lubricated and if the outer casing is
too long or too short.
• If you hear abnormal noise as a result of looseness in a pulley, you should replace the
pulley.
• If the wheel becomes stiff and difficult to turn, you should lubricate it with grease.
• Do not apply any lubricant to the inside of the hub, otherwise the grease will come out.
• You should periodically wash the sprockets in a neutral detergent and then lubricate
them again. In addition, cleaning the chain with neutral detergent and lubricating it can
be a effective way of extending the useful life of the sprockets and the chain.
• If the chain keeps coming off the sprockets during use, replace the sprockets and the
chain.
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• Always be sure to use the sprocket set bearing the same group
Group marks
marks. Never use in combination with a sprocket bearing a
different group mark.
• Because the high cable resistance of a frame with internal cable
routing would impair the SIS function, this type of frame should
not be used.
• Use an outer casing which still has some length to spare even
when the handlebars are turned all the way to both sides.
Furthermore, check that the shifting lever does not touch the
bicycle frame when the handlebars are turned all the way.
• Grease the inner cable and the inside of the outer casing before use to ensure that
they slide properly.
• To avoid any interference between the inner cable and the shoe in the area near the
chain stay, use the SM-CG90.
• Operation of the levers related to gear shifting should be made only when the front
chainwheel is turning.
• 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.
ag - 18T
ag -15
T
ag
-1
3T
SH
IM
O
AN
HYPERGL I DE - C
In order to realize the best performance, we recommend that the following
combination be used.
Series
NEXAVE
Shifting lever
ST-C503
Outer casing
SP40 sealed
Rear derailleur
RD-C505
Type
MGS
Freehub
FH-C500 / FH-C501
Gears
8
Cassette sprocket
CS-LG60
Chain
CN-HG73
Bottom bracket guide
SM-SP18 / SM-BT18
Specifications
Rear Derailleur
Model number
RD-C505
Type
Smartcage
Gears
8
Total capacity
44 teeth or less
Largest sprocket
33T
Smallest sprocket
11T
Front chainwheel tooth difference
22T
Applicable front chainwheel (chainring tooth configuration)
FC-C505 (46 - 34 - 24T)
Cassette sprocket tooth combination
Type
Gears
Group name
Tooth combination
LG
8
bb
11, 13, 15, 17, 21, 25, 29, 33T
Gear shifting operation
Both lever (A) and button (B) return to the initial lever or button position when they are
released after shifting. When operating lever (A) or button (B), always be sure to turn the
crank arm at the same time.
To shift from a larger sprocket
to a smaller sprocket [ lever (A) ]
To shift from a smaller sprocket to a
larger sprocket [ button (B) ]
The gear shifts by a single gear for each
operation.
Press button (B) once and then release it to
shift one step from a smaller to a larger
sprocket.
Lever (A) initial position
Button (B)
Lever (A)
Installation of the lever
Use a handlebar grip with a
maximum outer diameter of 32 mm.
Tightening torque :
6 - 8 N·m {53 - 69 in. lbs.}
5 mm Allen key
Installation of the rear derailleur
When installing, be careful not to let the B-tension adjustment screw come into contact with
the dropout tab, otherwise deformation may result.
Do not remove the Pro-Set alignment block at this time.
Tightening torque:
8 - 10 N·m {70 - 86 in. lbs.}
5 mm Allen key
B-tension
adjustment screw
Dropout tab
Chain length
Add 2 links (with the chain on
both the largest sprocket and
the largest chainring)
Installation of the chain
Largest sprocket
Largest chainring
1. Install the chain with the Pro-Set
alignment block still attached.
After installing, remove the
Pro-Set alignment block.
Chain
Pro-Set alignment block
2. Turn the crank arm to set the derailleur to the low position.
Adjustment
Carry out low adjustment and top adjustment without the cable
installed.
1. Low adjustment
•
•
•
•
Before carrying out low adjustment, check that the low
adjustment screw is screwed in as far as it will go.
Secure the front derailleur cable, and then while turning
the Crank arm, operate the shifting lever to set the chain
onto the largest chainring.
While turning the Crank arm, pull the rear derailleur by
hand to set the chain onto the 2nd-gear sprocket.
While turning the Crank arm, loosen the low adjustment
screw until the chain shifts onto the largest sprocket.
Low adjustment
screw
1
2
Largest sprocket
2
1
Guide pulley
2. Top adjustment
Turn the crank arm while pulling the derailleur with your
hand to move the derailleur to the top position, and then
turn the top adjustment screw to adjust so that the guide
pulley is in line with the outer line of the
Top adjustment
screw
smallest sprocket when looking from the
rear.
Turn the crank arm to set the derailleur to
the low position.
Outer line
of smallest
sprocket
1
1
2
2
Guide pulley
3. Installation and securing of the outer casing and
inner cable
Press button (B) 7 or more times to set the lever to the
lowest position, check on the indicator that the lowest
position is correct, and then install and adjust the inner
cable.
Then remove the inner hole cover and connect the inner
cable.
Note that the inner cable bends along its routing path.
Tightening torque:
5 - 7 N·m {44 - 60 in. lbs.}
Inner hole cover
Inner cable
Button (B)
Install the inner hole cover by
turning it as shown in the
illustration until it stops.
Do not turn it any further than
this, otherwise it may damage
the screw thread.
Tightening torque:
0.3 - 0.5 N·m {3 - 5 in. lbs.}
Inserting the inner cable
Insert the inner cable into the outer casing from the end
with the marking on it. Apply grease from the end with the
marking in order to maintain
cable operating efficiency.
Marking
Cutting the outer casing
When cutting the outer casing, cut the opposite end to the
end with the marking. After cutting the outer casing, make
the end round so that the inside of the
hole has a uniform diameter.
Attach the same outer end cap to the cut end of
the outer casing.
Outer end cap
Connect the inner cable to the derailleur as shown in the
illustration.
If routing the casing upward
If routing the
casing downward
Note: Be sure that the cable is
securely
in the groove.
Groove
Connect the cable to the rear derailleur and,
after taking up the initial slack in the cable,
re-secure to the rear derailleur as shown in
the illustration.
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
Pull
4. How to use the B-tension
adjustment screw
B-tension adjustment screw
•
While turning the pedals, operate the right lever to move the
chain to the largest sprocket. Then operate the left lever to
move the chain first to the intermediate chainring, and then
move it to the smallest chainring.
Largest
sprocket
Smallest
chainring
Largest
sprocket
Intermediate
chainring
Largest
sprocket
Smallest
chainring
•
Check that the teeth of the sprocket are overlapping the
indicated section of the gauge label. If they are not
overlapping, adjust by the following procedure.
Gauge label
Check
Teeth
OK
If the teeth are above the
section indicated by the
arrow, loosen the B tension
screw.
If the teeth are below the
section indicated by the
arrow, tighten the B tension
screw.
If there is no gauge seal
attached, turn the B tension
screw until the guide pulley is
within the range indicated in
the illustration.
m
16m
13-
m
41m
38-
Guide pulley
As a guide, the teeth move about 1 mm for every 270°
rotation of the B tension screw.
While turning the pedals, operate the left lever to move the
chain first to the intermediate chainring, and then move it
once more to the smallest chainring. If a gauge label is
attached, check that the teeth of the sprocket are
overlapping the indicated section of the gauge label. If no
gauge label is attached, check that the guide pulley is within
the indicated range. If teeth are not overlapping or the guide
pulley position is incorrect, repeat the adjustment
procedure.
5. SIS Adjustment
Push button (B) while turning the crank arm to move the derailleur
to the largest sprocket. Then operate lever (A) once to move the
derailleur to the 2nd-gear sprocket. After this, turn the crank arm.
When changing to
3rd
23
If shifting to 2nd is not
possible, or shifting to
2nd occurs but noise of
the chain contacting the
largest sprocket is heard
23
Adjustment bolt
Turn the cable adjustment bolt
clockwise to tighten it until the
chain returns to the 2nd sprocket.
23
23
Adjustment bolt
Change to 2nd and turn the screw
counterclockwise until no noise is
heard.
Best setting
The best setting is when the cable adjustment bolt is tightened
(turned clockwise) until noise occurs without lever (A) being
operated, and then loosened (turned counterclockwise) 360
degrees from that point.
Operate lever (A) to change gears, and check that no noise occurs
in any of the gear positions.
For the best SIS performance, periodically lubricate all
power-transmission parts.
Installation of the sprockets
For each sprocket, the surface that has the group mark should
face outward and be positioned so that the wider part of each
sprocket and the A part (where the groove width is wide) of the
freewheel body are aligned.
A
ac -14T
Wide part
The groove is
wide at one
place only.
Spacer
Lock ring
H
IM
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HYP
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G
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4 0 0 kg /c
m
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AN
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LO
J AP
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T 4268
25
9
• For installation of the sprockets, use the special tool (TL-HG16)
to tighten the lock ring.
Tightening torque:
30 - 50 N·m {261 - 434 in. lbs.}
Lock ring
• To replace the sprockets, use the
special tool (TL-HG16) and TL-SR20
to remove the lock ring.
Tool
(TL-SR20)
TL-HG16
Disassembly
Replacement of the freewheel body
After removing the hub axle,
remove the freewheel body
fixing bolt (inside the
freewheel body), and then
replace the freewheel
body.
Freewheel body
Note: Do not attempt to
disassemble the
freewheel body, because it
may result in a malfunction.
Freewheel body fixing bolt
Disassembly
Assembly
10 mm Allen key
(TL-WR37)
Tightening torque :
35 - 50 N·m {305 - 434 in. lbs.}
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.
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, Osaka 590-8577, Japan
Please note: specifications are subject to change for improvement without notice. (English)
© Aug. 2003 by Shimano Inc. XBC SZK Printed in Japan
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