Shimano GRX RD-RX400 Dealer'S Manual Download Page 36

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Maintenance

Replacement of the plate and the plate tension spring

Install the plate unit cover screws.

Plate unit cover screw

1 - 1.5 N·m

Twist the plate, install the plate stopper pin.

Plate

Plate stopper pin

1 N·m

NOTICE

•

Hold the plate and rear derailleur body firmly when working, as there is spring
tension applied to the plate.

Summary of Contents for GRX RD-RX400

Page 1: ...English Dealer s Manual ROAD MTB Trekking City Touring Comfort Bike URBAN SPORT E BIKE Rear Derailleur GRX RD RX810 RD RX812 RD RX400 DM GARD001 02...

Page 2: ...talling the chain 11 Checking the chain length 11 Connection and securing of the inner cable 14 Outer casing length 14 Connection and securing of the inner cable 16 Adjusting the stroke on the low lim...

Page 3: ...asy access to the internet please contact a SHIMANO distributor or any of the SHIMANO offices to obtain a hardcopy of the User s Manual Please observe the appropriate rules and regulations of the coun...

Page 4: ...cracking skipping or other abnormalities such as unintended gear shifting The chain may break and you may fall If any problems are found consult your place of purchase or a distributor When using TL C...

Page 5: ...lebars are turned all the way to either side Furthermore check that the shifting lever does not touch the bicycle frame when the handlebars are turned all the way The end of the outer casing which has...

Page 6: ...ls to be used The following tools are needed for installation removal adjustment and maintenance purposes Tool 2 mm hexagon wrench 3 mm hexagon wrench 4 mm hexagon wrench 5 mm hexagon wrench 5 5 mm sp...

Page 7: ...nstalling the rear derailleur TECH TIPS The rear derailleur will not gear shift properly if the derailleur hanger is not straight Use TL RD11 to check whether the derailleur hanger is straight or not...

Page 8: ...on be sure to install the rear derailleur so that the stopper plate contacts the B tension stop with no gap in between Stopper plate Rear derailleur fixing screw Stopper plate B tension stop 8 10 N m...

Page 9: ...mount type 1 Set the switch lever in the OFF position Switch lever ON OFF 2 Remove the bracket axle plate RD RX810 RD RX812 RD RX400 3 Install the rear derailleur 1 Insert the derailleur hanger into t...

Page 10: ...10 Installation removal Installing the rear derailleur 2 Install the rear derailleur with the B axle2 Derailleur hanger 1 B axle2 2 8 10 N m...

Page 11: ...uter face of the smallest sprocket when viewed from the rear side High limit screw Smallest sprocket Guide pulley High limit screw RD RX400 RD RX810 RD RX812 Installing the chain Refer to the dealer s...

Page 12: ...Add 4 or 6 links to set the length When setting the chain length with 4 links added if you are concerned about turbulence in the drivetrain components when the chain is on the largest sprocket and la...

Page 13: ...it through the main body of the rear derailleur from the side of the chain derailment prevention plate as shown in the figure If the chain is not passed through the correct position damage may be caus...

Page 14: ...body without leaving a gap B screw Bracket body Stopper plate 2 Determine the length of the outer casing Fit a sealed outer cap to the end of the outer casing Align the end of the outer cap to the bo...

Page 15: ...he outer casing that is opposite to the marking Outer cap with tongue 4 Remove the outer cap with tongue from the cut outer casing 5 Spread out the tip of the liner using a thin tool such as a TL CT12...

Page 16: ...al position Operate the release lever 10 times or more 2 Secure the inner cable to the rear derailleur There is no cover with tongue for RD RX400 Inner cable Cover with tongue NOTICE When replacing th...

Page 17: ...shifting lever several times in order to tension the shift cable assembly and fully seat all the shift cable components 4 Re secure the inner cable to the rear derailleur While pulling the inner cable...

Page 18: ...heel Do not allow the wheel to turn while carrying out this step Adjusting the stroke on the low limit 1 Adjust by turning the low limit screw Adjust so that the center of the guide pulley is aligned...

Page 19: ...ainring and the largest sprocket Turn the crank arm in reverse Smallest chainring Largest sprocket 2 Adjust the B screw Bring the guide pulley as close to the largest sprocket as possible without any...

Page 20: ...move the slack from the chain SIS adjustment 1 Set the switch lever in the OFF position Switch lever ON OFF 2 Operate the shifting lever once to shift to the 2nd sprocket counting from the smallest sp...

Page 21: ...ckwise slightly to tighten it just enough until the noise stops 7 Operate the shifting lever to change gears while turning the crank and check that no noise occurs in any of the gear positions TECH TI...

Page 22: ...ed in any direction 2 5 5 N m 2 5 5 N m Guide pulley RD RX810 RD RX812 RD RX400 RD RX810 RD RX812 RD RX400 Tension pulley 2 5 5 N m 2 5 5 N m Guide pulley Tension pulley NOTICE The pulley for RD RX810...

Page 23: ...ion in the chain stabilizer assembly or if it starts to make noise you may need to add grease to the chain stabilizer When assembling reverse the procedure 1 Set the switch lever in the OFF position S...

Page 24: ...ber Y04120800 100 g Roller clutch NOTICE Be careful not to get grease inside the roller clutch Otherwise the clutch could stick slip or otherwise malfunction Adjusting friction The level of friction c...

Page 25: ...2 mm hexagon wrench to remove the plate unit cover Plate unit cover 3 Turn the friction adjustment screw to adjust the friction Friction adjustment screw Increase Decrease RD RX810 Friction adjustment...

Page 26: ...N m RD RX812 RD RX810 RD RX400 Cam unit Chain stabilizer Switch lever ON NOTICE If adjusting the friction once more be sure to set the switch lever to the OFF position while pressing the cam unit wit...

Page 27: ...he plate unit cover if the plate unit is not fully seated against the switch base This may result in insufficient sealing which can lead to corrosion and malfunction of the chain stabilizer assembly 6...

Page 28: ...ension spring Removal 1 Set the switch lever in the OFF position Switch lever ON OFF NOTICE If operating the switch lever while the plate unit cover is removed hold the cam unit down with your finger...

Page 29: ...s there is spring tension applied to the plate 3 Turn the plate to loosen the plate tension spring As shown in the figure squeeze the outer casing holder and cable attachment portion together to move...

Page 30: ...ance Replacement of the plate and the plate tension spring 5 Remove the plate unit cover Plate unit cover 6 Remove the chain stabilizer and cam unit Cam unit Chain stabilizer 7 Remove the plate axle P...

Page 31: ...e axle Grease application area Grease number Premium Grease Y04110000 Plate axle NOTICE Do not apply grease outside of the application area indicated above If grease is applied here it will get inside...

Page 32: ...pring RD RX812 Plate tension spring Plate axle 8 10 N m Plate RD RX400 Plate tension spring Plate axle Plate 8 10 N m 3 Check that the switch lever is in the OFF position If the switch lever is in the...

Page 33: ...to the cam unit as shown in the figure Check that the cam lobe of the cam unit is in the position shown in the figure Cam unit Chain stabilizer Cam lobe NOTICE Ensure the cam unit is installed with th...

Page 34: ...34 Maintenance Replacement of the plate and the plate tension spring 5 Install the cam unit and chain stabilizer Pay attention to the positioning of the cam lobe of the cam unit...

Page 35: ...in stabilizer Plate If there is resistance when moving the switch lever to the ON position the components are installed correctly If there is no resistance check the position of the cam lobe of the ca...

Page 36: ...ng 7 Install the plate unit cover screws Plate unit cover screw 1 1 5 N m 8 Twist the plate install the plate stopper pin Plate Plate stopper pin 1 N m NOTICE Hold the plate and rear derailleur body f...

Page 37: ...Please note specifications are subject to change for improvement without notice English Dec 2020 by SHIMANO INC ITP...

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