Shimano ST-6510 - Operation of Front Derailleur Levers; Trimming (Noise Prevention Operation); Caution on Operation

Operation of front derailleur levers
(FD-6500 / FD-5500 / FD-5501)
• Lever aF : Shifts from smaller to larger front chainring.
Lever aF
lever aF
start position
x
x'
If operation of lever a
F
dose not
complete the chainring shift stroke,
operate lever a
F
again for the
distance (X') to complete that part of
the lever stroke (X) which was short.
Full gear shift stroke
Actual stroke
• Lever b
F
: Shifts from largest chainring to intermediate
chainring.
Lever bF
lever bF
start position
When lever b
F
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 to the
smaller front chainring.
Gear shift
complete stroke
Trim operation
Click
Click
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
F
lightly (to the point where
it clicks); this causes the front derailleur to
move slightly towards the smaller
chainwheel, thereby eliminating
the noise.
Movement of the
front derailleur
Chain position
Operation of front derailleur levers
(FD-6503 / FD-5503 / FD-5504)
• Lever aF : Shifts from smaller to larger front chainring.
2
1
Lever aF
lever aF
start position
x
x'
If operation of lever a
F
dose not
complete the chainring shift stroke,
operate lever a
F
again for the
distance (X') to complete that part of
the lever stroke (X) which was short.
Full gear shift stroke
Actual stroke
• Lever b
F
: Shifts from largest chainring to intermediate
chainring.
Lever bF
lever bF
start position
• Lever b
F
: Shifts from intermediate chainring to smallest
chainring.
Gear shift
complete stroke
Click
Click
Caution on operation
Lever
b
F
will also move when lever aF is operated, but
be careful not to apply pressure to lever
b
F
. Similarly
be careful not to press lever a
F when operating lever
b
F
. Gears will not shift when both levers are pressed
simultaneously.
Be sure to read these service instructions in conjunction with
the service instructions for the FD-6500/FD-6503/
FD-5500/FD-5501/FD-5503/FD-5504 before use.