TECHNICAL MANUALV2022.031. GENERAL.................................................................................................................. 3
1.1Validity........................................................................................................................... 3

1.2Safety............................................................................................................................ 3

1.3Target group.................................................................................................................. 3

1.4Layout............................................................................................................................ 3

1.5DT Swiss manual concept............................................................................................ 3

1.6How to use the manual................................................................................................ 4

1.7General maintenance information............................................................................... 4

1.8Environmental protection............................................................................................. 4

1.9Exclusion of liability...................................................................................................... 41.10 Warranty........................................................................................................................ 42. RATCHET LN - REAR HUB SERVICE........................................................................ 5
2.1Overview........................................................................................................................ 5

2.2Required wearing parts and materials........................................................................ 6

2.3Required tools............................................................................................................... 6

2.4Removing the end caps................................................................................................ 6

2.5Dismounting the freewheel body and the freewheel system..................................... 7

2.6Dismounting the ring nut............................................................................................. 8

2.7Dismounting the ball bearing on the non drive side................................................... 9

2.8Dismounting the ball bearing at the drive side........................................................... 92.9Cleaning and checking all parts.................................................................................. 112.10 Mounting the ball bearing at the drive side................................................................. 122.11 Mounting the ring nut................................................................................................... 132.12 Mounting the ball bearing at the non drive side......................................................... 152.13 Assembling the freewheel system and the freewheel body....................................... 162.14 Mounting the end cap................................................................................................... 173. TROUBLE SHOOTING................................................................................................ 18

21. GENERAL1.1 VALIDITYThis manual describes the component specified on the front page and the footer. This manual is valid for thedesign of the product as of 14.03.22. Deviations are possible and all items are subject to technical changes.

1.2 SAFETYThe safety instructions are classified as follows:DANGER...indicates a hazardous situation that, if not avoided, will result in death or serious injury.

CAUTION… indicates a hazard with a medium level of risk which, if not avoided, may result in minor or moderateinjury.

NOTICE… indicates a potentially hazardous situation that may result in damage to property.

1.3 TARGET GROUPThis manual is intended for the user of the component and dealers. This manual offers the experienced userthe possibility to carry out minor service work himself. If you have any doubts about your own abilities, youshould definitely contact a specialist or a DT Swiss Service Center.
Any warranty claims will lapse if work is not carried out properly.

1.4 LAYOUTThe cover page and the footing provide information about the type of product and manual as well as theversion of the manual. The DT Swiss contact details can be found on the back. A list of all DT Swiss servicecenters can be found at www.dtswiss.com.
This manual is intended for being printed as an A5 booklet. Only print this manual if electronic usage is notpossible.

1.5 DT SWISS MANUAL CONCEPTThe DT Swiss manuals are split into the following types of manuals:••User Manual: Information for the end user on how to install and use the component.
Technical Manual: Detailed information for the end user and the dealer on how to maintain thecomponent, spare parts and technical data.

Ratchet LN - Technical Manual31.6 HOW TO USE THE MANUALThe steps described in this manual must be carried out in the order they are shown. If steps are ignored orexecuted in a wrong order, the function of the component cannot be guaranteed.

1.7 GENERAL MAINTENANCE INFORMATIONUnless otherwise specified, moving parts, threads, O-rings and seals must be greased before assembly.

CLEANINGFor an optimal result of the maintenance work, every component that will be disassembled must be cleaned.
Only use cleaners which do not damage the components. Especially the cleaning of O-rings and sealsrequires mild cleaners. Observe the instructions for use of the respective cleaner.
DT Swiss recommends the following cleaners:•••Motorex RexMotorex SwisscleanMotorex OPAL 2400, 3000 OPAL, OPAL 5000Use soap water or similar mild cleaners for external cleaning.

TOOLSTo ensure a damage-free mounting and dismounting of the components, only use the tools which arementioned in this manual. Special tools are indicated at the beginning of a chapter in the table "Requiredmaterial".
The use of different tools is at the discretion of the user. If components are damaged by the usage of differingtools, the user is liable.
DT Swiss special tools are precision tools. Damage-free mounting and dismounting of the components canonly be ensured if the tools are working properly and if the condition of the tools are perfect. Always keep thetools in their original packaging or adequate devices to prevent damage.

1.8 ENVIRONMENTAL PROTECTIONThe statutory regulations shall apply. Whenever possible, avoid creating waste. Waste, especially carbon,lubricants, cleaners and any other fluids must be disposed in an environmentally compatible manner.
Only print this manual if electronic usage is not possible.

1.9 EXCLUSION OF LIABILITYThe activities listed in this manual may only be carried out by persons with sufficient specialist knowledge.
The user is liable for any damage or consequential damage caused by wrongly maintained or installedcomponents. If you have doubts, please contact your region's DT Swiss pro level service center.

1.10 WARRANTYWarranty conditions, see www.dtswiss.com

42. RATCHET LN - REAR HUB SERVICEPreparatory Steps:LinkDismount the brake rotorDismount cassetteClean the hub2.1 OVERVIEW
13

541

2

6

7

8

3

11

9

1end cap non drive side

6

10

10

129shim ring11 seal freewheel body

2ball bearing non drive side7ring nut12 freewheel body3axle8spacer13 end cap drive side

4hub shell9spring

5ball bearing drive side10 ratchetRatchet LN - Technical Manual

52.2 REQUIRED WEARING PARTS AND MATERIALSWearing parts / MaterialsSpecificationQuantityArticle numberDT Swiss universal grease20 gHXTXXX00NMG20SDT Swiss special grease20 gHXT10032508SQuantityArticle numbertool for ring nut1HXTXXX00N5027Sinstallation cylinder Ø15 / 28 x 40 mm

2HXTXXX00N5042S2.3 REQUIRED TOOLSToolsSpecification

NOTERISK OF DAMAGING THE ADAPTERS!
To avoid damages, only use grind clamping jaws, aluminum clamping jaws or special tools toclamp the adapters.

2.4 REMOVING THE END CAPS1. Pull off both end caps by hand.
If the end caps cannot be pulled off by hand,clamp the end caps carefully into a vise withground clamping jaws and pull the hub / wheelupwards.

62.5 DISMOUNTING THE FREEWHEEL BODY AND THE FREEWHEEL SYSTEM1. Pull the freewheel body off the hub.

2. Remove both ratchets and both springs fromthe hub.

3. Remove the spacer from the hub.

Ratchet LN - Technical Manual72.6 DISMOUNTING THE RING NUTDue to the torque acting on the ring nut during pedaling, the ring tightens while riding. Therefore,it is possible that the ring nut is very difficult to loosen. We recommend loosening the ring nutonly when the wheel is complete as the lever is much larger.
1. Clamp the ring nut tool in the high position inthe vise.
2. Push the hub onto the tool with the drive sidefirst.

3. Loosen the ring nut by turning the hub / thewheel counterclockwise.

4. Remove the hub from the tool.
5. Remove the ring nut.

82.7 DISMOUNTING THE BALL BEARING ON THE NON DRIVE SIDE1. Tap out the ball bearing on the non drive sidewith a plastic hammer with slight hammerstrokes onto the axle.

2. Remove the ball bearing from the axle.

2.8 DISMOUNTING THE BALL BEARING AT THE DRIVE SIDE1. Insert the short side of the axle through thesecond ball bearing on the drive side.

Ratchet LN - Technical Manual

92. Put the installation cylinder onto the axle.
→ By using the installation cylinder, the ballbearing cannot tilt during disassembly.
Damage to the bearing seat is notpossible.

3. Tap out the ball bearing with slight hammerstrokes on the axle.
4. Remove the installation cylinder from the hub.

5. Remove the ball bearing from the axle.

102.9 CLEANING AND CHECKING ALL PARTS1. Thoroughly clean all parts of the hub. The existing grease must be completely removed fromthe hub body and from the ratchets.
2. Check the ratchets for wear.
The wear of the ratchets usually starts at theouter circumference and shows itself by stronglyflattened edges with uneven wear.
In case of heavy wear, the ratchets must bechanged immediately.

3. Check the internal teeth of the freewheel bodyfor wear.
If the black surface of the gearing is heavily worn(no longer black but silver), if there are burrs orif material has been removed, the freewheel bodymust be replaced.

Ratchet LN - Technical Manual

112.10 MOUNTING THE BALL BEARING AT THE DRIVE SIDE1. Grease the bearing seats and the thread of thering nut with universal grease.

2. Put the installation cylinder into the vise.
3. Insert the long side of the axle into theinstallation cylinder.
4. Place the hub shell on the tool and the axlewith the non-drive side facing down.
5. Push a new bearing on the hub shell with thecolored side facing outwards.

6. Put the installation cylinder onto the bearing.
7. Tap in the ball bearing carefully with slighthammer strokes.
8. Remove the installation cylinder and the axlefrom the hub.

122.11 MOUNTING THE RING NUT1. Clamp the tool for ring nut in the deep positionin the vise.
2. Slide the ring nut onto the tool with the recessfacing upwards.
3. Insert the shim ring in the recess of the ringnut.

4. Insert the axle, long side first, from the nondrive side through the ball bearing on the driveside.
5. Grease the ball bearings on the drive side withuniversal grease.

6. Place the hub with the axle on the tool.
7. Put the installation cylinder onto the axle.
→ By using the installation cylinder, the ringnut cannot tilt when screwed in.

8. Screw on the ring nut approx. 2 turnsclockwise.
9. Remove the hub from the tool.

2x10. Remove the installation cylinder from the hub.

Ratchet LN - Technical Manual

1311. Unclamp the ring nut tool, turn it 90° andclamp it back into the vise in the high position.
12. Put the hub back on the tool with the ring nutscrewed in.

13. Tighten the ring nut as firmly as possible byhand.

142.12 MOUNTING THE BALL BEARING AT THE NON DRIVE SIDE1. Clamp the tool for the ring nut in the vise.
2. Push the hub shell with the drive side onto thetool for the ring nut.
3. Push the axle with the long side first into theball bearing on the drive side.
4. Put on a new bearing on the non drive sidewith the colored side facing outwards.

5. Put the installation cylinder onto the bearing.
6. Tap in the ball bearing carefully with slighthammer strokes.

7. Check the ball bearings.
→ The hub must turn smoothly.
→ The hub must not have axial play.
8. If necessary, drive in the bearing on the nondrive side or loosen the bearing.
9. Repeat previous steps until the hub is turningsmoothly.

Ratchet LN - Technical Manual152.13 ASSEMBLING THE FREEWHEEL SYSTEM AND THE FREEWHEEL BODYDANGERRISK OF INJURY DUE TO LIMITED FREEWHEEL FUNCTION DUE TO INCORRECTLUBRICATION!
If too much grease is applied on the ratchets, the actuation of the ratchets may not work. Theratchets may slip during pedaling.
•Only apply a thin, even layer of grease.

•Only use the red DT Swiss special grease.

1. Apply DT Swiss special grease evenly to theouter and the inner toothing of the ratchetsusing a fine brush.
→ For an optimal functionality of thefreewheel system, a thin layer of grease issufficient.

2. Grease the teeth of the freewheel body and thering nut with DT Swiss special grease.

3. Put the spacer onto the axle.

164. Put on the first spring.
→ The spring must rest on the hub with itslarge diameter.
5. Attach both ratchets and the second spring.
→ The spring must rest with its smalldiameter on the ratchet.

6. Put the freewheel body onto the hub.
7. Check if the freewheel body can be turned andif the ratchets are engaging.

2.14 MOUNTING THE END CAP1. Grease the ball bearing and the inside of theend cap with universal grease.
2. Put on the end cap by hand.

Closing Steps:LinkMount the brake rotorAssembling the cassetteRatchet LN - Technical Manual

173. TROUBLE SHOOTINGIssueReasonSolutionFreewheel is blockedSpacer was forgotten duringassembly.

Check correct assembly, see “2.1Overview”, page 5.

Spacer was compressed byovertightening the thru axle.

Measure the length of the spacer. Ifthe spacer is shorter than 15.4 mm, itmust be replaced.

One or both ratchets are mountedupside down.

Check correct assembly, see “2.1Overview”, page 5.

Too much or wrong grease on theratchets.

Clean and grease ratchets, see “2.13Assembling the freewheel system andthe freewheel body”, page 16.

Ratchets are worn.

Replace ratchets.

One or both springs wereforgotten during assembly.

Check correct assembly, see “2.1Overview”, page 5.

Ball bearings were not mountedcorrectly.

Check correct assembly, see “2.1Overview”, page 5.

Ball bearings are worn out.

Replace ball bearings.

Ball bearings are worn out.

Replace ball bearings.

Ball bearing non-drive side drivenin too tight.

Check correct assembly, see “2.1Overview”, page 5.

Freewheel does not engage /slipsHub has axial playHub rotates stifflyMounting sequence of the ballbearings not observed.
Hub makes noiseBall bearings are worn out.

Replace ball bearings.

Notches from the cassette onthe freewheel body.

The steel cassette works itselfinto the alloy web of the freewheelbody.

Remove bad notches from the rotorusing a file.

Freewheel body rotates withdifficulty.

Ball bearings in the freewheelbody are worn out.

Replace freewheel body.

Freewheel is too noisy / tooquiet.

The perception of the freewheel sound is very subjective. While someriders prefer a loud freewheel sound, other riders want a quiet freewheel.
In principle, the freewheeling sound can be influenced by the amount ofgrease between the ratchets. Less grease increases the freewheelingsound, but at the same time leads to higher wear.

18DT SWISS AGLängfeldweg 101CH - 2504 Biel/Bienneservice.ch@dtswiss.comDT SWISS ASIA LTD.
No.5, Jingke 5th Rd., Nantun DistrictTaichung City 408Taiwan (R.O.C.)
service.tw@dtswiss.comDT SWISS, INC.
2493 Industrial Blvd.
USA - Grand Junction, CO 81505techusa@dtswiss.comDT SWISS DEUTSCHLAND GmbHAlbert-Einstein-Strasse 359302 OeldeGermanyservice.de@dtswiss.comDT SWISS (FRANCE) S.A.S.
Parc d‘Activites de la SarréeRoute de GourdonF - 06620 Le Bar sur Loupservice.fr@dtswiss.comDT SWISS POLSKA Sp. z o.o.
ul. Towarowa 36PL-64-600 ObornikiPolandservice.pl@dtswiss.comSubject to technical alterations, errors and misprints excepted.
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