167194 1355 Sports & Fitness Bikes & Biking Bike Repair & Maintenance true Thu, 26 Mar 2009 16:05:02 -0700 /system/videos/6/94/71/16/167194.flv bike repair, bike maintenance, bike cleaning, bicycle maintenance, bicycle repair, bicycle cleaning, how to clean a bike, how to clean a bicycle, how to clean a chain, how to clean a bicycle chain How To Clean and Lubricate a Rear Derailleur http://www.howcast.com/videos/167194-How-To-Clean-and-Lubricate-a-Rear-Derailleur http://www.howcast.com/videos/167194-How-To-Clean-and-Lubricate-a-Rear-Derailleur/edit approved 479 640 480 <object width="425" height="352" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" id="howcastplayer"><param name="movie" value="http://www.howcast.com/flash/howcast_player.swf?file=167194"></param><param name="allowFullScreen" value="true"></param><param name="allowScriptAccess" value="always"></param><embed src="http://www.howcast.com/flash/howcast_player.swf?file=167194" type="application/x-shockwave-flash" width="425" height="352" allowFullScreen="true" allowScriptAccess="always" ></embed></object> 2 caeasura http://img.howcast.com/system/thumbnails/167194/rear_derailleur_howcast_thumbnail_xxlarge_maintained_aspect.jpg 4308 false false false 64103 1 51 Step http://img.howcast.com/system/thumbnails/167194/51.jpg Clean the derailleur pulleys by holding the blade of your screwdriver against the sides of the pulleys and turning the crank. You can do this with the wheel in the dropouts, or with the wheel removed.

]]> 64102 2 83 Tip For easier access to the top (jockey) pulley, shift your chain into the largest cog. This opens up the derailleur body and rotates the pulley cage forward, exposing the jockey pulley.

]]> 64242 3 99 Tip Remove the wheel for easier access to the sides of the derailleur pulleys facing toward the bike (the inboard sides). Shift the chain into the small cog, open the brake so that the tire clears the brake pads, open the quick release lever, and tap the wheel so that it comes out of the frame dropouts. Then shift the derailleur back up, as if to the largest cog, to open the derailleur body, just like you did with the sides facing away from the bike (the outboard sides).

]]> 64245 4 168 Step http://img.howcast.com/system/thumbnails/167194/168.jpg Brush the dirt off of your derailleur using a combination of brushes with bristles of varying length and stiffness, like the ones in the Finish Line Easy-Pro Brush Set.

]]> 64243 5 185 Tip Don’t worry if you pick up grease with the brushes and smear it on the derailleur. The degreaser you’ll be using in the next step will strip it off. However, be sure to always clean off your brushes before your next cleaning task. Remove dust, dirt, and debris by brushing them vigorously against a hard edge like a concrete step, then swirl them around in a container filled wth a degreaser that you know is safe on plastics, like Finish Line Multi.

]]> 64246 6 241 Warning Using a brush with small, stiff bristles, pay special attention to the derailleur pivots. If they’re not clean when you lube them, the application of lube will drive more dirt into them, grinding them down every time you shift. This will create excess play in the pivots (slop), which is one of the most overlooked causes of imprecise shifting. Slop is a condition that gets progressively worse over time, and cannot be repaired.

]]> 64244 7 256 Step http://img.howcast.com/system/thumbnails/167194/256.jpg Degrease the derailleur using Finish Line Speed Clean, a powerful degreaser that dries almost instantly. You won’t have to wait before applying lube, or worry that the lube will be broken down by excess degreaser that didn’t dry.

]]> 65172 8 289 Tip This is also a good time to go over the pulleys again. First spray down the jockey pulley with Speed Clean while turning the crank, then take your rag, hold it between your thumb and forefinger, and pinch the pulley while continuing to turn the crank. Any dirt that didn’t come off on the screwdriver blade will come off on the rag. Repeat with the bottom pulley. This is most effective if the pulley is still moist with degreaser when you run it through the rag. Because Speed Clean dries so quickly, ensure this by spraying down only one pulley at a time, so that the bottom pulley doesn’t dry before you’re done with the jockey.

]]> 64584 9 311 Step http://img.howcast.com/system/thumbnails/167194/311.jpg Lubricate the derailleur by first spraying it down with Finish Line Dry Teflon Lube, then injecting Extreme Fluoro, a fully fluorinated grease, into all points of friction.

]]> 64585 10 353 Tip Don’t worry if you don’t remove all of the excess lube when wiping down the derailleur. Although it wasn’t originally developed as a surface coating, Dry Teflon Lube makes it easier to wipe off dirt after a ride.

]]> 64586 11 370 Tip To make sure that you lubricate all of the moving parts of the derailleur, begin by looking at the top of the derailleur body in which the spring is housed (the parallelogram). Lubricate the pivots at the four corners of the parallelogram by injecting Extreme Fluoro directly into the spaces between the surfaces of the parallelogram. Then look at the bottom of the parallelogram, and do the same. Once you’ve taken care of the pivots, lubricate the derailleur pulleys by injecting Extreme Fluoro into the space between the centers of the pulleys and the metal plates that hold them in place (the derailleur cage), remembering to do this on the outboard as well as the inboard sides of the pulleys. Last, lubricate the large pivot where the derailleur cage attaches to the derailleur body, and the large pivot around the bolt that attaches the derailleur to the frame. You can find additional points of friction by holding the derailleur in your hand and gently moving it in all directions, up and down, front and back, and side to side. Inject lubricant into any space where parts of the derailleur are moving relative to one another.

]]> 64587 12 420 Warning Wipe off excess grease to prevent the derailleur from picking up dirt during rides.

]]> 64589 13 445 Tip Shift through your derailleur’s full range of motion, beginning with the derailleur in the lowest position, with the chain where the small cog would be if the wheel were in, then shifting up to the highest position, with the chain where the large cog would be if the wheel were in, then back down again. Do this a couple of times. It will allow the lube to work its way into the pivots, and at the same time drive excess lube out of the pivots so that you can wipe it off in a clean, controlled environment before riding.

]]> 64588 14 473 Tip For more maintenance and repair tips, go to www.finishlineusa.com and www.maintainthatride.blogspot.com.

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