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5. Trimming mechanism adjustment and checking
While turning the crank arm, gently operate lever (B) and check that
the front derailleur moves slightly toward the smallest chainring. If the
front derailleur moves by a large amount and the chain is set onto the
smallest chainring at this time, loosen the top adjustment bolt by 1/8th
of a turn. Then, after returning the
chain to its original position, adjust
and check the trimming mechanism.
General Safety Information
Technical Service Instructions
SI-5JU0A-002
WARNING
• 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.
• Obtain and read the service instructions carefully prior to installing the parts. If
adjustments are not carried out correctly, the chain may come off and this may
cause you to fall off the bicycle which could result in serious injury.
• Be careful not to let the cuffs of your clothes get caught in the chain while riding,
otherwise you may fall off the bicycle.
• Read these Technical Service Instructions carefully, and keep them in a safe
place for later reference.
Note
• If gear shifting operations cannot be carried out smoothly, clean 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.
• When the chain is in the position shown in the illustration, the chain may contact
the front chainrings or front derailleur and generate noise.
If the noise is a problem, shift the chain
onto the next-larger rear sprocket or the
one after.
• For smooth operation, use the specified outer casing and the 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.
• 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.
Front
chainrings
Rear
sprockets
FD-R773
Front derailleur
* Service Instructions in further languages are available at : http://techdocs.shimano.com
Please note: specifications are subject to change for improvement without notice.(English) © Aug. 2009 by Shimano Inc. XBC SZK Printed in Japan.
Specifications
Installation of the front derailleur
Front shifting (SL-R770)
Type Band type / Brazed on type
Front chainwheel tooth difference 22 teeth or less 20 teeth or less
Model number FD-R773-2 FD-R773-0
Front derailleur
installation band diameter
S (ø28.6mm),
M (ø31.8mm), L (ø34.9mm)
Chainstay angle (
C
)
63° - 66°
Chain line 45mm
Chainstay
angle
Adjust and then install the front derailleur as shown in the illustration.
Do not remove the Pro-Set alignment block at this time.
1mm
3mm
Gear teeth should
come within this
range
Pro-Set gauge
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.
2. Connection and securing of cable
While pulling the inner cable, tighten the wire fixing
bolt with a 5 mm allen key to secure the cable.
3. Top adjustment
Set so that the clearance between the chain guide
outer plate and the chain is 0 - 0.5 mm.
Largest
sprocket
Smallest
chainring
Chain position
Pro-Set alignment block
Pull
Tightening torque:
6 - 7 N·m
{52 - 60 in. lbs.}
After taking up the initial slack in the cable, re-secure
to the front derailleur as shown in the illustration.
Smallest
sprocket
Largest
chainring
Chain position
4. Cable adjustment using the intermediate chainring
When making the cable adjustment, place the chain on the largest
sprocket for the rear and the middle chainring for the front.
Note: There are 2 derailleur positions for the intermediate chainring. When
making the cable adjustment, make sure that the derailleur is in the
inner side (toward small chainring) of the two positions. Locate the
derailleur to this position by shifting from the largest to the
intermediate chainring (recommended) or by shifting from the small to
the intermediate chainring, then gently press lever (B) until a small
click is felt (to position the derailleur to the inner side of the
intermediate chainring).
Adjust the cable tension by using the outer adjustment barrel so that
the clearance between the chain guide inner plate and the chain is
0 - 0.5 mm.
Largest
sprocket
Intermediate
chainring
Chain position
Chain guide
inner plate
Top adjustment
screw
Chain guide
outer plate
Chain
Chain
Be sure to read these service instructions in conjunction with the service
instructions for the SL-R770 before use.
Pro-Set alignment block
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
Smallest
sprocket
Largest
chainring
Chain position
Low adjustment
screw
Chain guide
inner plate
Chain
Top adjustment
screw
Chain guide
outer plate
Chain
6. Troubleshooting chart
After completion of steps 1 - 5, 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 outer plate at the
largest chainring
If the intermediate chainring is skipped
when shifting from the largest chainring
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.
If there is interference between the chain
and the front derailleur inner plate when
the chain is on the smallest chainring and
the largest sprocket
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 1/8 turn).
Loosen the top adjustment screw
counterclockwise (about 1/8 turn).
Loosen the outer casing adjustment
barrel counterclockwise (
1or2turns
).
Tighten the outer casing adjustment
barrel clockwise (1 or 2 turns).
Tighten the low adjustment screw
clockwise (about 1/8 turn).
Loosen the low adjustment screw
counterclockwise (about 1/8 turn).
In order to realize the best performance, we recommend that the following
combination be used.
Shifting lever
SL-R770
Outer casing
SP41
Gears
30
Front derailleur
FD-R773-2 : for FC-7803 / 6603 / 6604G / 6703
(52T top chainring)
FD-R773-0 : for FC-5603 / R553
(50T top chainring)
Front chainwheel
FC-7803 / FC-6603 / FC-5603 / FC-6604G / FC-6703 / FC-R553
Rear derailleur
RD-7900 / RD-7800 / RD-6600 / RD-5600
Freehub
FH-7900 / FH-7800 / FH-6600 / FH-5600
Cassette sprocket
CS-7900 / CS-7800 / CS-6600 / CS-5600
Chain
CN-7900 / CN-7801 / CN-6600 / CN-5600
Bottom bracket cable guide
SM-SP17
Chainwheel
(largest chainring)
Chain guide
Tightening torque:
5 - 7 N·m {44 - 60 in. lbs.}
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.
Example:
from intermediate chainring
to largest chainring.
Lever (A) initial position
To shift from a large chainring to a smaller chainring
When lever (B) is pressed once, there is a shift of one step from
a large chainring to a smaller chainring.
Example:
from largest chainring
to intermediate chainring.
Lever (B)
When lever (B) is operated, there is one click
where trimming (the noise prevention
mechanism) engages, and a second stronger
click when the gear shift stroke is completed.
After trimming, the next push will complete the
gear shift stroke.
Trimming (noise prevention operation)
If the chain is on the large front chainwheel and the larger rear
sprocket, the chain will rub in the front derailleur plate,
producing a characteristic noise. When this happens, press
lever (B) lightly (to the point where it clicks); this causes the
front derailleur to move slightly towards the smaller chainwheel,
thereby eliminating the noise.
Gear shift
complete stroke
Click
Trim operation
Click
Lever (B)
Movement of the front
derailleur
Chain position
A
B
Outer casing adjustment barrel
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.
When installing the components to carbon frame/handle
bar surfaces, verify with the manufacturer of the carbon
frame/parts for their recommendation on tightening
torque in order to prevent over tightening that can cause
damage to the carbon material and/or under tightening
that can cause lack of fixing strength for the components.
SI-5JU0A-002-00
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