SRAM RED - 2012 Derailleurs Installation and Adjustment


Uploaded by SRAMtech on 14.05.2012

Transcript:
Welcome to SRAM technical communication. This video will show you
how to correctly install and adjust the new RED rear derailleur and the new RED
front derailleur featuring YAW technology. The YAW technology featured
in the front derailleur allows the derailleur cage to rotate and maintain a
consistent angular relationship with the chain, eliminating the need for shifter trim.
As a result,
shifts feel more direct, more precise, and combined with the exclusively compatible
new RED crankset and chainrings,
delivers an unmatched performance advantage in front shifting.
This front derailleur is unlike any you’ve installed before.
Follow these instructions closely.
You’ll need the following tools and supplies:
2.5, 4, and 5 millimeter hex wrenches.
A torque wrench.
Friction paste and grease.
A pair of cable cutters. A chain tool. To protect your eyes and hands wear safety
glasses and nitrile gloves.
Let’s begin with rear derailleur installation.
Make sure your derailleur hanger is properly aligned to your frame.
Apply grease to the threads of the hanger.
Make sure the B-adjust tab is positioned properly against the hanger.
Attach the rear derailleur to the hanger and tighten the bolt to 5-7 Newton meters.
Turn the high limit screw until the center of the upper teeth are aligned
with the outer edge of the smallest cog.
Push the derailleur toward the bike and turn the low limit screw until the center of the
upper pulley teeth are aligned with the center of the largest cog.
Set the chain gap at the largest and smallest cog to be as close as possible,
but not less than 6 millimeters.
Measure a length of GORE low friction cable housing, that when installed
has no sharp bends and enters the derailleur in a straight line.
Install one nosed ferrule and one standard ferrule onto the housing.
The nosed ferrule goes into the frame cable stop.
Pull the cable taut.
Click the rear shift lever several times to make sure it is in the highest gear position.
Wrap the cable around the fin and into the groove of the cable anchor washer.
Then tighten the cable anchor bolt to 5-7 Newton meters.
Next, let’s install the front derailleur.
For braze-on style frames, position the derailleur on the braze-on tab.
Place the tabbed washer on the front of the braze-on tab and insert the hollow
threaded mounting bolt.
Tighten the bolt just enough to prevent the derailleur from sliding down.
For clamp style frames, position the derailleur on the clamp tab, and insert
the hollow threaded mounting bolt. Tighten the bolt to 5-7 Newton meters.
Apply friction paste to the inside of the clamp. Place the clamp around the seat tube
and insert the clamp bolt.
Tighten the bolt just enough to prevent the clamp from sliding down.
Adjust the front derailleur height so that the tip of the tallest teeth on the large
chainring appear within the setup line went viewed directly from the side.
It may be helpful to mark the height with a pencil line or a piece of tape.
It is important to note that the setup line can only be used for height adjustment the
first time the derailleur is installed.
Once you have changed the factory settings for the limit screws,
you can no longer use the setup line to adjust the height of the derailleur.
Rotate the derailleur to align the nose and tail guide marks with the tooth tips of
the large chainring.
Next, adjust the low limit screw to precisely set the YAW rotational
alignment of the guide marks with the tooth tips.
If the guide marks are inboard of the chainring,
turn the low limit screw clockwise.
If the guide marks are outboard of the chainring,
turn the low limit screw counter-clockwise.
You may need to alternate between rotating the derailleur by hand and
adjusting the low limit screw to achieve proper alignment.
Be careful that the derailleur height does not change.
Tighten the braze-on mounting bolt to 5-7 Newton meters, or the clamp bolt to
4-5 Newton meters.
Before making final adjustments to your derailleurs,
you’ll need to install the chain.
To size the chain,
wrap it around the largest cog and the largest chainring.
Add one inner link and one outer link.
Route the chain through both derailleurs.
Connect the ends with the SRAM PowerLock.
Rotate the crank until the PowerLock is above the rear chainstay.
Apply the rear brake and push down on the crankarm to engage the PowerLock.
You should hear and feel the PowerLock click into place.
Now that the chain is installed, you can continue to make adjustments to the front derailleur.
Shift the rear derailleur until the chain is on the largest cog.
While rotating the crank, turn the front derailleur low limit screw
counter-clockwise until the chain drops onto the small chainring.
Continue to adjust the low limit screw until you only hear a very slight
rasping sound from the chain touching the inner cage plate of the derailleur.
The rasping sound will be eliminated when tension is applied to the chain when riding.
You can simulate this by engaging the rear brake while rotating the crank.
Measure the gap between the tallest teeth of the large chainring and the bottom
edge of the outer cage plate.
It must be 1-2 millimeters.
If it isn’t please consult our troubleshooting guide for assistance.
Now that you’ve achieved the correct heigh and YAW, set the front shift lever to the
small chainring position.
If your frame does not have integrated barrel adjusters, you’ll need to install
the inline barrel adjuster included with the front derailleur.
Route the cable through any cable guides and under the cable anchor washer.
Pull the cable taut
and tighten the cable anchor bolt to 5 Newton meters.
With the chain in the smallest cog and the largest chainring,
hold the front shift lever in far as possible while you turn the high limit
screw clockwise
until it lightly contacts the inner link tab.
Then, turn the high limit screw counter-clockwise until there is
1 millimeter of clearance between the inside of the outer cage plate and the chain.
Release the shift lever.
To firmly seat the front derailleur cable and ferrules,
shift the chain onto the small chainring and largest rear cog.
Then, forcefully press and hold the front shift lever inboard as far as
possible several times.
Rotate the cranks to upshift to the large chainring.
Proper cable tension is critical for optimal performance of front derailleur systems.
Use the barrel adjusters to change the front derailleur cable tension.
When making the shift to the large chainring
there should be no inward movement of the front derailleur when the shifter
lever is released.
To install the chain spotter, first shift the chain to the small chainring.
Now, install the chain spotter and tighten the chain spotter bolt just
enough to hold it in place.
Turn the positioning bolt to adjust the chain spotter as close to the chain as
possible without contacting it.
Hold the chain spotter in place and tighten the chain spotter bolt to
0.5-1 Newton meter.
To firmly seat the rear derailleur cable housing and ferrules,
shift the rear derailleur to the largest cog,
then forcefully press and hold the shift lever inboard as far as possible a
couple of times.
If you experience slow shifting from a smaller cog to a larger cog, turn the
barrel adjusters counter-clockwise.
If you experience slow shifting from a larger cog to a smaller cog,
turn the barrel adjusters clockwise.
Repeat this process until the shifting is smooth.
This concludes the installation and adjustment of the RED derailleurs.
Thanks for watching�