RD-M780-S (GS/SGS)
Contents
1. frame Rubber shield E T e LI ENG A V NG x S Ad OS NE If the rear derailleur moves to a large degree such as in bicycles with rear suspension it is recommended that you replace the cap with an aluminum cap Derailleur side ia a Aluminum cap The end of the outer casing which has the aluminum cap should be at the derailleur side Connect the cable to the rear derailleur and after taking up the initial slack in the cable re secure to the rear derailleur as shown in the Note Be sure that the cable is securely in the groove illustration Pull Groove Tightening torque 6 7 N m 52 60 in Ibs Note Set the inner cable so that it protrudes by a length of less than about 30 mm and then check that the inner cable does not interfere with the spokes of the wheel Stop the wheel from turning while carrying out this step Less than 30 mm 5 How to use the B tension adjustment screw Mount the chain on the smallest chainring and the largest sprocket and turn the crank arm to shift gears Then turn the B tension adjustment screw to adjust so that the guide pulley does not interfere with the sprocket but not so close that it touches the chain Next set the chain to the smallest sprocket and repeat the above to make sure that the pulley t does not touch the sprocket Largest sprocket Smallest sprocket B tension adjustment sc2. of the rear suspension is large the slack in the chain may not be taken up properly when the chain is on the smallest chainring and smallest sprocket Chain Largest sprocket Largest chainring Add 2 links with the chain on both the largest sprocket and the largest chainring 4 Outer casing length 1 Loosen the B tension adjustment screw until it is in the position shown in the illustration 2 Check that there is enough slack in the outer casing Next align the outer casing with the bottom edge of the outer casing holder at the rear derailleur and then cut of any excess length of outer OUr casing Molder 2 casing EN va E oe Note The distance between the outer stopper to the outer casing holder of the rear derailleur may change when the rear suspension moves so determine the length of the outer casing at the point where this length is at its greatest Cutting the outer casing When cuiting the outer casing cut the opposite end to the end with the marking After cutting the outer casing make the end round so that the gt inside of the hole has a uniform diameter L SHIMANO SIS SP a N Outer end cap ae 2 ie Be careful not to bend Attach the same outer end cap to the cut end of the outer casing SHIMANO SIS SP eed The sealed cap with tongue and the rubber shield should be installed to the outer casing stopper of the
3. the A part where the groove width is wide of the freewheel body are aligned Installation of the sprockets For installation of the HG sprockets use the special tool TL LR15 LR10 to tighten the lock ring Lock ring Tightening torque 30 50 N m 261 434 in Ibs L To replace the HG sprockets use the special tool TL LR15 LR10 and TL SR21 Sprocket spacer Wide part wide at one place only SIS Adjustment 1 Top adjustment Turn the top adjustment screw to adjust so that the guide pulley is in line with the outer line of the smallest sprocket when looking from the rear Outer line of smallest sprocket Top adjustment screw to remove the lock ring Lock ring spacer Tool TL LR15 LR10 L SR21 Disassembly 2 Low adjustment Turn the low adjustment screw so that the guide pulley moves to a position directly in line with the largest sprocket Low adjustment Largest sprocket Screw Guide pulley 3 Chain length on bicycles with rear suspension The length of A will vary depending on the movement of the rear suspension Because of this an excessive load may be placed on the drive system if the chain length is too short Set the length of the chain by adding two links to the chain when the rear suspension is at a position where dimension A is longest and the chain is on the largest sprocket and the largest chainring If the amount of movement
4. DEORE XT Rear Derailleur RD M 180 s GS SGS Silver Version Long Cage Super Long Cage RD M 180 GS SGS Black Version Long Cage Super Long Cage M4 x 16 5mm M4 x 18 mm ITEM SHIMANO NO CODE NO DESCRIPTION INTERCHANGEABILITY ae Y5XP98080 Bracket Axle Unit 2 Y5XP98030 B Tension Adjusting Screw M4 x 18 amp Plate 3 Y5W798030 Cable Fixing Bolt M5 x 8 amp Plate A 4 Y5W798020 Stroke Adjusting Screws amp Plate B A 5 Y5UC14000 P Seal Ring A A 6 Y5W722000 P Tension Spring A 7 Y5XP98040 Outer Plate Assembly GS Type Y5XP98050 Outer Plate Assembly SGS Type B 8 Y5XF98060 Guide amp Tension Pulley Unit B A 9 Y5XC09100 Inner Plate GS Type B Y5XF10100 Inner Plate SGS Type A 10 Y53M24400 Pulley Bolt M5 x13 95 B A A Same parts B Parts are usable but differ in materials appearance finish size etc Absence of mark indicates non interchangeability Specifications are subject to change without notice SHIMANO Apr 2012 3180A Shimano Inc A SI 5XP0A 001 00 i General Safety Information A WARNING Maintenance interval depends on the usage and riding circumstances Clean regularly the chain with an appropriate chaincleaner Never use alkali based or acid based solvents such as rust cleaners If those solvent be used chain might break and cause serious injury e Iin order to obtain good gear shifting performance this chai
5. ase note specifications are subject to change for improvement without notice English Jan 2011 by Shimano Inc XBC SZK Printed in Japan SI 5XPOA 001 RD M780 Technical Service Instructions Rear derailleur In order to realize the best performance we recommend that the following combination be used Series XT Shifting lever SL M780 SL M780 I Outer casing OT SP41 Rear derailleur RD M780 Type SGS GS Freehub FH M785 FH M788 Gears 10 Cassette sprocket CS M771 10 Chain CN HG94 Bottom bracket guide SM SP17 BT17 Specifications Rear Derailleur Model number RD M780 Type SGS GS Gears 10 10 Total capacity 43T 35T Applicable sprocket combination 11 32T 11 34T 11 36T Smallest sprocket 11T 11T Front chainwheel tooth difference 18T 18T 5 mm Allen key Installation of the rear derailleur O Bracket spindle Tightening torque 8 10 N m 70 86 in Ibs Dropout Note Periodically check that there is no gap between the dropout and the bracket as shown in the illustration If there is a gap between these two parts problems with gear shifting performance may occur For each sprocket the lt CS M771 10 gt surface that has the group mark should face outward bL 11 32T and be positioned so that bJ 11 34T the wider part of each bk 11 36T sprocket and
6. ated and if the outer casing is too long or too short e f you hear abnormal noise as a result of looseness in a pulley you should replace the pulley e You should periodically wash the sprockets in a neutral detergent and then lubricate them again In addition cleaning the chain with neutral detergent and lubricating it can be a effective way of extending the useful life of the sprockets and the chain e If the chain keeps coming off the sprockets during use replace the sprockets and the chain e Use a frame with internal cable routing is strongly discouraged as it has tendencies to impair the SIS shifting function due to its high cable resistance e Always be sure to use the sprocket set bearing the same group marks Never use in combination with a sprocket bearing a different group mark e Use an outer casing which still has some length to spare even when the handlebars are turned all the way to both sides Furthermore check that the shifting lever does not touch the bicycle frame when the handlebars are turned all the way e A special grease is used for the gear shifting cable Do not use DURA ACE grease or other types of grease otherwise they may cause deterioration in gear shifting performance e Grease the inner cable and the inside of the outer casing before use to ensure that they slide properly e For smooth operation use the specified outer casing and the bottom bracket cable guide e Operation of the levers related to gear shif
7. d making noise turn the outer casing adjustment barrel clockwise slightly to tighten it until the noise stops and the chain runs smoothly Operate lever to change gears and check that no noise occurs in any of the gear positions For the best SIS performance periodically lubricate all power transmission parts E Replacing the rear derailleur Guide pulley Tension pulley Tightening torque 2 5 5 0 N m 22 44 in Ibs
8. n has a forward side and a reverse side and the sides are marked so that the chain will face the correct way when installed The proper design performance will be obtained when the chain is installed so that it faces the correct way If it is installed so that it faces the opposite way the chain may come off and the bicycle may fall over and serious injury may occur as a result e Use the reinforced connecting pin only for connecting the narrow type of chain e If connecting pins other than reinforced connecting pins are used or if a reinforced connecting pin or tool which is not suitable for the type of Chain A Chain tool chain is used sufficient gP connection force may not ee be obtained which could iG abeed Supernaiton K T TL CN32 cause the chain to break chain for MTB TL CN23 or fall off with groove 2 BT M TI TL CN27 e Make sure that the connecting pin is aligned with the outer link surface from the side that Link A finger over it The pin will protrude slightly on the backside after the break off pin is removed e If it is necessary to adjust the length of the chain due to a change in the number of sprocket teeth make the cut at some other place than the place where the chain has been joined using a reinforced connecting S pin The chain will be damaged if it is cut at a place where it has been joined with a reinforced connecting pin e Check that the tension of the chain is correct and
9. rew lt Checking the distance between the largest sprocket and the guide pulley gt Set the rear derailleur to the lowest gear a position stop the wheel from turning and then check that the distance from the edge of the guide pulley to the edge of the largest sprocket is within the range of 5 6 mm Turn the crank arm to shift gears and check that there is no lA roughness in the feel If the number of teeth for the cassette sprocket is changed carry out this setting again 6 SIS Adjustment Operate the shifting lever several times to move the chain to the 2nd sprocket Then while pressing the lever just enough to take up the play in the lever turn the crank arm When no sound 32 at all is heard I When shifting to 32 3rd LIU Zz ra Adjustment barrel 32 Tighten the outer casing adjustment barrel until the chain returns to the 2nd sprocket clockwise Loosen the outer casing adjustment barrel until the chain touches the 3rd sprocket Best setting The best setting is when the shifting lever is operated just enough to take up the play and the chain touches the 3rd sprocket and makes noise and makes noise counter Return the lever to its original position the position where the lever is at the 2nd sprocket setting and it has been clockwise 32 released and then turn the crank arm clockwise If the chain is touching the 3rd sprocket an
10. that the chain is not damaged If the tension is too weak or the chain is damaged the chain should be replaced If this is not done the chain may break and cause serious injury e Obtain and read the service instructions carefully prior to Link Pin 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 e 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 e Read these Technical Service Instructions carefully and keep them in a safe place for later reference the pin is inserted It should feel smooth and flush when you run your O Connecting pin Reinforced Connecting Pin Link Pin Note e If gear shifting operations do not feel smooth wash the derailleur and lubricate all moving parts e f the amount of looseness in the links is so great that adjustment is not possible you should replace the derailleur e You should periodically clean the derailleur and lubricate all moving parts mechanism and pulleys e lf gear shifting adjustment cannot be carried out check the degree of parallelism at the rear end of the bicycle Also check if the cable is lubric
11. ting should be made only when the front chainwheel is turning e The guide pulley has an arrow on it to indicate the direction of rotation Install the guide pulley so that the arrow is pointing counterclockwise when looking at the outer side of the derailleur e The tension pulley has an arrow on it to indicate the direction of rotation Install the tension pulley so that the arrow is pointing clockwise when looking at the outer side of the derailleur e Parts are not guaranteed against natural wear or deterioration resulting from normal use e For maximum performance we highly recommend Shimano lubricants and maintenance products e For any questions regarding methods of installation adjustment maintenance or operation please contact a professional bicycle dealer Group marks This service instruction explains how to use and maintain the Shimano bicycle parts which have been used on your new bicycle For any questions regarding your bicycle or other matters which are not related to Shimano parts please contact the place of purchase or the bicycle manufacturer SHIMANO SHIMANO AMERICAN CORPORATION One Holland Irvine California 92618 U S A Phone 1 949 951 5003 SHIMANO EUROPE B V Industrieweg 24 8071 CT Nunspeet The Netherlands Phone 31 341 272222 SHIMANO INC 3 77 Oimatsu cho Sakai ku Sakai shi Osaka 590 8577 Japan Service Instructions in further languages are available at http techdocs shimano com Ple
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