Shimano FD-R443 Front Derailleur Service Instructions
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Shimano FD-R443 is a front derailleur designed for triple front chainwheel use. It ensures smooth and precise shifting between chainrings, allowing you to adapt to varying terrain or riding conditions. The derailleur is compatible with Shimano SL-R440 shifters and requires the use of a narrow type chain for optimal performance. It features adjustable low and top limit screws for fine-tuning the shifting positions and preventing chain derailment.
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SI-5E70A-000-00
WARNING
• Obtain, read and carefully service instructions when installing parts. A loose, worn, or damaged parts may cause injury to the rider.
We strongly recommend that only genuine
Shimano replacement parts be used.
SERVICE INSTRUCTIONS
FD-R443
SI-5E70A
Front derailleur
Note
• If attaching the FD-R443 (brazed-on type) to a seat tube with a thickness of more than 31.8 mm, the derailleur may come into contact with the seat tube and interfere with normal gear shifting performance.
• For smooth operation, use the specified outer casing and bottom bracket cable guide.
• Grease the inner cable and the inside of the outer casing before use to ensure that they slide properly.
• 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.
• 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.
Before use, read these instructions carefully, and follow them for correct use.
In order to realize the best performance, we recommend that the following combination be used.
Shifting lever
Outer casing
Gears
Front derailleur
Front chainwheel
Bottom bracket
Rear derailleur
Freehub
SL-R440
SP40
27
FD-R443
FC-6503 FC-5504 FC-4403
BB-6500 BB-5500 BB-UN52
RD-6500/RD-5500/RD-4400
FH-6500/FH-5500/FH-4400
Cassette sprocket
Chain
Bottom bracket cable guide
CS-6500/CS-HG70-9/CS-HG50-9
CN-HG92/CN-HG72
SM-SP17
Specifications
Type
Front chainwheel tooth difference
Min. difference between top and intermediate
Front derailleur installation band diameter
Chainstay angle ( a )
Chain line
Stroke
A
A'
Band type / Brazed on type
22 teeth or less
10T
S (28.6mm), M (31.8mm)
63° - 66°
45mm
Chainstay angle
Installation of the front derailleur
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-Set gauge
Pro-Set alignment block
1mm
3mm
The level section of the chain guide outer plate should be directly above and parallel to the largest chainring.
Secure using a 5mm Allen key.
Tightening torque:
5 - 7 Nm
{44 - 60 in. lbs.}
A-52
Chainwheel
(largest chainring)
Chain guide
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
Please note: specifications are subject to change for improvement without notice. (English)
© Sep. 2009 by Shimano Inc. XBC SZK Printed in Japan.
SIS adjustment
Be sure to follow the sequence described below.
1. Low adjustment
First remove the Pro-Set alignment block .Next, set so that the clearance between the chain guide inner plate and the chain is 0-0.5mm.
Chain position
Largest sprocket
Smallest chainring
4. Adjustment of the intermediate chainring
When carrying out adjustment, set the chain to the largest sprocket, and at the front, set the chain to the intermediate chainring. Adjust using the outer casing adjustment barrel so that the clearance between the chain guide inner plate and the chain is 0-0.5
mm.
Chain position
Largest sprocket
Intermediate chainring
Chain guide inner plate
Chain
A B
B A
Top adjustment screw
B
Pro-Set alignment block
B A
Low adjustment screw
2. Connection and securing of cable
While pulling the inner cable, tighten the wirw fixing bolt with a 5 mm allen key to secure the cable.
Tightening torque:
5 - 7 Nm
{44 - 60 in. lbs.}
Pull
After taking up the initial slack in the cable, re-secure to the front derailleur as shown in the illustration.
3. Top adjustment
Set so that the clearance between the chain guide outer plate and the chain is 0-0.5 mm.
Chain position
Smallest sprocket
Largest chainring
A
Chain guide outer plate
Chain
Outer casing adjustment barrel Chain guide inner plate
Chain
B A
%
Front shifting (SL-R440)
Both lever (A) and lever (B) always return to the initial position when they are released after shifting.
When operating one of the levers, always be sure to turn the crank arm at the same time.
To shift from a small chainring to a larger chainring
When lever (A) is pressed once, there is a shift of one step from a small chainring to a larger chainring.
Lever (A) initial position
Example:
from intermediate chainring to largest chainring.
To shift from a large chainring to a smaller chainring
When lever (A) is pressed once, there is a shift of one step from a large chainring to a smaller chainring.
Example:
from intermediate chainring to intermediate chainring.
Levier (B)
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.)
If the chain falls to the crank side
If shifting is difficult from the intermediate chainring to the largest chainring
If shifting is difficult from the intermediate chainring to the smallest chainring
If there is interference between the chain and the front derailleur inner plate at the largest chainring
If there is interference between the chain and the front derailleur outer plate at the largest chainring
If the intermediate chainring is skipped when shifting from the largest chainring
Tighten the top adjustment screw clockwise (about 1/4 turn).
Loosen the top adjustment screw counterclockwise (about 1/8 turn).
Loosen the low adjustment screw counterclockwise (about 1/4 turn).
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 front derailleur inner plate when the rear sprocket is shifted to the largest sprocket when the chainwheel is at the intermediate chainring position.
If the chain falls to the bottom bracket side.
Loosen the outer casing adjustment barrel counterclockwise (1 or 2 turns).
Tighten the outer casing adjustment barrel clockwise (1 or 2 turns).
Tighten the low adjustment screw clockwise (about 1/2 turn).
Be sure to read these service instructions in conjunction with the service instructions for the SL-R440 before use.
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