SERVICE MANUAL SHIMANO NEXUS 7-SPEED HUB
Contents
1. SHIMANO NEXUS 7 SPEED HUB S C2e SHIMANO SG 7C26 Note Unit parts should never be disassembled If they are problems may result When replacing parts replace the whole internal assembly or unit part Tools Note Before carrying out disassembly have ready the hub spanners TL 7S20 and internal hub grease Screwdriver Left TL 7820 Right Hub spanners Part No 3 130 9890 17mm x 22mm 2 pcs 1 Hold the two bevelled surfaces of the hub axle on the brake arm side in a vice and remove the dust cap with a screwdriver a Vice Note Do not damage the threads of the hub axle 2 Turn the brake arm unit upside down and hold the two bevelled surfaces of the hub axle on the sprocket side in a vice Note Do not damage the threads of the hub axle Remove the left hand lock nut from the hub axle and then remove the stop nut TL 7S20 Lock nut Stop nut 3 Remove the brake arm unit and ball retainer B from the hub axle Brake arm unit Ball retainer B 4 Remove the hub shell Hub shell A Internal assembly Now it can be replaced with the new internal assembly Disassembly and assembly can be carried out quickly Part No 33Z 9801 5 Remove the brake shoe unit a uee Brake shoe unit 6 Remove the stop ring with a screwdriver At this time the stop ring come off with great force Be careful2. of the safety using cloth and so on Screwdriver Stop ring After removing them at the same time remove carrier unit 2 from ring gear unit 2 J Remove ring gear unit 2 and carrier unit 2 at the same time while turning ring gear unit 2 slightly to the left and right Carrier unit 2 Carrier unit 2 Ring gear unit 2 Ring gear unit 2 Note If undue force is applied during removal the pawls inside will become damaged which will cause operation problems 8 Remove sun gear unit 2 and 3 while turning them slightly to the left and right Sun gear unit 2 amp 3 9 Remove carrier unit 1 10 Remove ring gear unit 1 while turning it slightly to the left and right 11 Remove ball retainer H while pressing in pawl C on the driver and axle unit with a screwdriver Pawl C KL Ball retainer H Be careful not to bend ball retainer H Screwdriver This completes the disassembly of the Inter 7 hub 1 Hold the two bevelled surfaces of the hub axle on the sprocket side in a vice i d Note k Do not damage the threads of the hub axle Vice Install ball retainer H while Note pressing in pawl C on the driver and axle unit with a screwdriver Ball retainer H Fs Screwdriver gaen Be careful of the setting direction 1 Apply a liberal coating of internal hub grease Be careful not to bend ball etainer H while pressing it Pawl C Be
3. careful not to catch on the end Cm of return spring C CAT Y 041 20800 i Note Apply a liberal coating of internal hub grease to the gear inside ring gear unit 1 Insert the end of the slide spring of ring gear unit 1 into the wide hole section B of the driver and axle unit press in pawl C 2 places with a screwdriver and then install ring gear unit 1 Pawl C Wide hole section B End of slide spring Check After installing ring gear unit 1 turn ring gear unit 1 firmly counterclockwise to check to be sure that pawl C makes a clicking sound lt Ring gear unit 1 Pawl C Pawl C Cm GTH Y 041 20800 4 Engage the teeth of the planet pinion in carrier unit 1 with the teeth of ring gear unit 1 and then press in ring gear unit 1 while turning it slightly to the left and right CE diN Y 041 20800 Engage the teeth of sun gear unit 2 and 3 with the teeth of the planet pinion in carrier unit 1 while turning sun gear unit 2 and 3 slightly to the left and right and then press in carrier unit 1 4 Sun gear unit 2 amp 3 CEE dH Y 041 20800 Note Apply a liberal coating of internal hub grease to the planet pinions 3 places in carrier unit 1 Teeth of planet pinion in carrier unit 1 Teeth of ring gear unit 1 Note Apply a liberal coating of internal hub grease to the teeth of sun gear unit 2 and 3 Be careful of the setting direct
4. e Apply a liberal coating of internal hub grease to the inside and outside of the brake shoe unit 13 Screw the stop nut to adjust so that the hub shell can be turned smoothly without any play After adjusting secure the stop nut with the lock nut TL 7S20 Stop nut This completes the assembly of the Inter 7 hub 14 install the dust cap e daH Y 041 20800 Spare parts list SHIMANO NEXUS 7 SPEED HUB w Coaster Brake SG C 1 6 Inter 7 Hub CJ NX10 Internal Hub Grease For coaster brake also Gi TL 7S40 B Q Internal Assembly NNN ary DESCRIPTION Internal Assembly Axle Length 175 5 mm Y 330 98010 Brake Shoe Unit 325 32000 Stop Ring 9 mm 330 98040 Carrier Unit 2 330 98020 Ring Gear Unit 2 33F 98060 Sun Gear Unit 2 amp 3 330 98060 Carrier Unit 1 330 98050 Ring Gear Unit 1 330 98070 Ball Retainer H 3 16 x 29 Axle amp Driver Unit Axle Length 175 5 mm 35B 98020 W Right Hand ae Cap B RC 35B 05000 Right Hand Dust Cap B 33Z 26000 Right Hand Dust Cap C 33Z 98020 Cassette Joint Fixing Ring 34N 98030 Axle Unit Axle Length 175 5 mm 330 24000 Return Spring A 33Z 10000 Gear Shifting Cam 33Z 11000 Feed Cam 35B 98030 Driver Unit w Right Hand Dust Cap B amp C Y 35C 98040 Driver Unit 330 91600 Ball Retainer F 3 16 x 12 33Z 98030 Right Hand Cone w Seal 33Z 28000 Right Hand Cone Seal 33F 98040 Driver Plate w Seal 330 12000 D
5. ing of internal hub grease to the inside and outside of the brake shoe unit 9 Align the notched section of the brake shoe unit with the end of slide spring in carrier unit 2 and then install the brake shoe unit T lt Notched section of the brake shoe unit End of slide spring GNI Y 041 20800 Note Apply a liberal coating of internal hub grease to the grease groove of the hub shell If seal spring R hooks into the wrong part of the right hand 10 Install the internal assembly while turning the hub shell slightly to the right and left so that seal spring R of the hub Shell is sitting in the right hand dust cap of the internal assembly dust cap push seal spring R with Guanes a screwdriver groove Ch i eck Seal spring R Right hand After installing the hub shell turn dust cap Hussen the hub shell counterclockwise Internal and check to be sure that it turns NTS Y 041 20800 assembly smoothly 11 Place ball retainer B onto Note the hub shell Be careful of the setting 4 direction Apply a liberal coating of internal i hub grease Ball retainer B ag Hub shell he my dag Y 041 20800 12 Place the brake arm unit onto the hub axle and turn it to the left and right so that the serrations of the brake shoe and brake arm unit engage with each other Then push the brake arm unit fully into the brake shoe unit Brake arm unit Serrations Brake shoe unit Not
6. ion If the setting is reversed installation will not be possible _ The gear with the smooth ring section is at top If undue force is applied the pawls inside will become damaged which will cause operation problems The gear with the smooth ring section is at top a Place ring gear unit 2 onto carrier unit 1 Ring gear unit 2 Carrier unit 1 Cm daH Y 041 20800 Note Apply a liberal coating of internal hub grease to the teeth of ring gear unit 2 Set so that the part with the teeth is at the top Note Apply a liberal coating of internal hub grease to the teeth of the planet pinion 3 places in carrier unit 2 J Engage the teeth of the planet pinion in carrier unit 2 with the teeth of ring gear unit 2 while turning carrier unit 2 slightly to the left and right and then press in ring gear unit 2 4 If undue force is applied the pawls inside will become damaged which will cause Teeth of planet pinion operation problems in carrier unit 2 Teeth of ring gear unit 2 Cm GiZ93 y 041 20800 Check Check to be sure that the stop ring groove on the hub axle is visible from the edge of carrier unit 2 while carrier unit 2 is pushed down 8 While pushing down carrier unit 2 insert the stop spring into the hub axle groove at the surface of carrier unit 2 Hub axle groove Stop ring should be visible Carrier unit 2 Note Apply a liberal coat
7. one 1 949 951 5003 Fax 1 949 768 0920 Specifications are subject to change for improvement without notice This publication is printed on recycled paper MA35CA Sep 2004 Shimano Inc UCI official neutral technical support
8. r Unit 2 amp 3 Carrier Unit 1 8 Y 330 98050 Ring Gear Unit 1 9 Y 330 98070 Ball Retainer H 3 16 x 29 Axle amp Driver Unit Axle Length 175 5 mm 10 Y 35C 98020 Wright Hand Dust Cap B amp C Right Hand Dust Cap B Right Hand Dust Cap C Cassette Joint Fixing Ring Axle Unit Axle Length 175 5 mm Return Spring A Gear Shifting Cam Feed Cam Driver Unit w Right Hand Dust Cap B amp C Driver Unit Ball Retainer F 3 16 x 12 Right Hand Cone w Seal Right Hand Cone Seal Driver Plate w Seal Driver Plate Seal Lock Washer Stop Washer Right Hand Lock Nut 3 4 mm Cap Nut 3 8 Non turn Washer 5R Yellow 29 30 Y 33M39600 Non turn Washer 6R Silver Y 33M39700 Non turn Washer 7R Black Y 33M39510 Non turn Washer 5L Brown Non turn Washer 6L White Non turn Washer 7L Gray Lock Nut 3 5 mm Stop Nut Brake Arm Unit Ball Retainer B 3 16 x 16 Sprocket Wheel 18T Sprocket Wheel 19T 35 Sprocket Wheel 20T Sprocket Wheel 21T Sprocket Wheel 22T Snap Ring C CJ NX10 Cassette Joint Unit Driver Cap CJ NX10 Cassette Joint Inner Cable Fixing Bolt Unit for CJ NX10 41 AEBSF 98090 Brake Arm Clip Unit 5 8 Y 33F 98100 Brake Arm Clip Unit 3 4 Clip Screw M6 x 16 Clip Nut TL 7S20 Hub Spanner 17 mm x 22 mm 2 pcs TL 7S40 B Right Hand Cone Tool Internal Hub Grease Net 100g 11 SHIMANO www shimano com SHIMANO AMERICAN CORPORATION One Holland Irvine California 92618 U S A Ph
9. river Plate Seal 33E 98120 Lock Washer 33Z 08000 Stop Washer 33Z 07020 Right Hand Lock Nut 3 4 mm 314 14010 Cap Nut 3 8 33Z 20500 Non turn Washer 5R Yellow 33M 39600 Non turn Washer 6R Silver 33M 39700 Non turn Washer 7R Black 33M 39510 Non turn Washer 5L Brown 33M 39610 Non turn Washer 6L White 33M 39710 Non turn Washer 7L Gray 321 38040 Lock Nut 3 5 mm Y 335 48110 Stop Nut 3 Y 33D 90100 Brake Arm Unit Ball Retainer B 3 16 x 16 Y 322 03420 Sprocket Wheel 18T Y 322 03520 Sprocket Wheel 19T 35 Y 322 03620 Sprocket Wheel 20T Sprocket Wheel 21T Y 330 60100 Sprocket Wheel 22T Snap Ring C CJ NX10 Cassette Joint Unit Driver Cap CJ NX10 Cassette Joint Inner Cable Fixing Bolt Unit for CJ NX10 41 Y 33F 98090 Brake Arm Clip Unit 5 8 Brake Arm Clip Unit 3 4 Clip Screw M6 x 16 Clip Nut TL 7S20 Hub Spanner 17 mm x 22 mm 2 pcs TL 7S40 B Right Hand Cone Tool Internal Hub Grease Net 100g N w w w N NININININININININ gt gt gt gt gt gt gt a oO OO Ni Od C1 BR CO MO gt O CO NJ O1 BR Go MJ N OJAN 10 SHIMANO NEXUS 7 SPEED HUB w Coaster Brake SG 7C26 Inter 7 Hub CJ NX10 Internal Hub Grease For coaster brake also TL 7S40 B Q Internal Assembly o o S a Internal Assembly Axle Length 175 5 mm Brake Shoe Unit Stop Ring 9 mm Carrier Unit 2 Ring Gear Unit 2 6 Y 33F 98060 Sun Gea
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