DT SWISS Ratchet LN User manual

TECHNICAL MANUAL
V2021.06

2
1. GENERAL .................................................................................................................3
1.1 Validity.......................................................................................................................... 3
1.2 Safety ........................................................................................................................... 3
1.3 Target group................................................................................................................. 3
1.4 Layout........................................................................................................................... 3
1.5 DT Swiss manual concept ........................................................................................... 3
1.6 How to use the manual ............................................................................................... 4
1.7 General maintenance information.............................................................................. 4
1.8 Environmental protection............................................................................................ 4
1.9 Exclusion of liability..................................................................................................... 4
1.10 Warranty....................................................................................................................... 4
2. RATCHET LN - REAR HUB SERVICE....................................................................... 5
2.1 Overview....................................................................................................................... 5
2.2 Required wearing parts and materials....................................................................... 6
2.3 Required tools.............................................................................................................. 6
2.4 Removing the end caps ............................................................................................... 6
2.5 Dismounting the freewheel body and the freewheel system .................................... 7
2.6 Dismounting the ring nut ............................................................................................ 8
2.7 Dismounting the ball bearing on the non drive side.................................................. 8
2.8 Dismounting the ball bearing at the drive side.......................................................... 9
2.9 Cleaning and checking all parts ................................................................................. 11
2.10 Mounting the ball bearing at the drive side................................................................ 11
2.11 Mounting the ring nut.................................................................................................. 12
2.12 Mounting the ball bearing at the non drive side ........................................................ 15
2.13 Assembling the freewheel system and the freewheel body ...................................... 16
2.14 Mounting the end cap.................................................................................................. 17
3. TROUBLE SHOOTING...............................................................................................18

Ratchet LN - Technical Manual 3
1. GENERAL
1.1 VALIDITY
This manual describes the component specied on the front page and the footer. This manual is valid for the
design of the product as of 07.06.21. Deviations are possible and all items are subject to technical changes.
1.2 SAFETY
The safety instructions are classied 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 moderate
injury.
NOTICE
… indicates a potentially hazardous situation that may result in damage to property.
1.3 TARGET GROUP
This manual is intended for the user of the component and dealers. This manual offers the experienced user
the possibility to carry out minor service work himself. If you have any doubts about your own abilities, you
should denitely contact a specialist or a DT Swiss Service Center.
Any warranty claims will lapse if work is not carried out properly.
1.4 LAYOUT
The cover page and the footing provide information about the type of product and manual as well as the
version of the manual. The DT Swiss contact details can be found on the back. A list of all DT Swiss service
centers 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 not
possible.
1.5 DT SWISS MANUAL CONCEPT
The 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 the
component, spare parts and technical data.

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1.6 HOW TO USE THE MANUAL
The steps described in this manual must be carried out in the order they are shown. If steps are ignored or
executed in a wrong order, the function of the component cannot be guaranteed.
1.7 GENERAL MAINTENANCE INFORMATION
Unless otherwise specied, moving parts, threads, O-rings and seals must be greased before assembly.
CLEANING
For 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 seals
requires mild cleaners. Observe the instructions for use of the respective cleaner.
DT Swiss recommends the following cleaners:
• Motorex Rex
• Motorex Swissclean
• Motorex OPAL 2400, 3000 OPAL, OPAL 5000
Use soap water or similar mild cleaners for external cleaning.
TOOLS
To ensure a damage-free mounting and dismounting of the components, only use the tools which are
mentioned in this manual. Special tools are indicated at the beginning of a chapter in the table "Required
material".
The use of different tools is at the discretion of the user. If components are damaged by the usage of differing
tools, the user is liable.
DT Swiss special tools are precision tools. Damage-free mounting and dismounting of the components can
only be ensured if the tools are working properly and if the condition of the tools are perfect. Always keep the
tools in their original packaging or adequate devices to prevent damage.
1.8 ENVIRONMENTAL PROTECTION
The statutory regulations shall apply. Whenever possible, avoid creating waste. Waste, especially carbon,
lubricants, cleaners and any other uids must be disposed in an environmentally compatible manner.
Only print this manual if electronic usage is not possible.
1.9 EXCLUSION OF LIABILITY
The activities listed in this manual may only be carried out by persons with sufcient specialist knowledge.
The user is liable for any damage or consequential damage caused by wrongly maintained or installed
components. If you have doubts, please contact your region's DT Swiss pro level service center.
1.10 WARRANTY
Warranty conditions, see www.dtswiss.com

Ratchet LN - Technical Manual 5
2. RATCHET LN - REAR HUB SERVICE
Preparatory Steps: Link
Dismount the brake rotor
Dismount cassette
Clean the hub
2.1 OVERVIEW
123
45678910 10 9
12 13
11
1 end cap non drive side 6 shim ring 11 hub seal
2 ball bearing non drive side 7 ring nut 12 freewheel body
3axle 8 spacer 13 end cap drive side
4 hub shell 9 spring
5 ball bearing drive side 10 ratchet

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2.2 REQUIRED WEARING PARTS AND MATERIALS
Wearing parts / Materials Specication Quantity Article number
DT Swiss universal grease 20 g HXTXXX00NMG20S
DT Swiss special grease 20 g HXT10032508S
2.3 REQUIRED TOOLS
Tools Specication Quantity Article number
tool for ring nut 1 HXTXXX00N5027S
installation cylinder Ø15 / 28 x 40 mm 2 HXTXXX00N5042S
NOTICE
RISK OF DAMAGING THE ADAPTERS!
To avoid damages, only use grind clamping jaws, aluminum clamping jaws or special tools to clamp the
adapters.
2.4 REMOVING THE END CAPS
1. 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 with ground clamping jaws
and pull the hub / wheel upwards.

Ratchet LN - Technical Manual 7
2.5 DISMOUNTING THE FREEWHEEL BODY AND THE FREEWHEEL SYSTEM
1. Pull the freewheel body off the hub.
2. Remove both ratchets and both springs from the
hub.
3. Remove the spacer from the hub.

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2.6 DISMOUNTING THE RING NUT
Due 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 difcult to loosen. We recommend loosening the ring nut only when the
wheel is complete as the lever is much larger.
1. Clamp the ring nut tool in the high position in the
vise.
2. Push the hub onto the tool with the drive side rst.
3. Loosen the ring nut by turning the hub / the wheel
counterclockwise.
4. Remove the hub from the tool.
5. Remove the ring nut.

Ratchet LN - Technical Manual 9
2.7 DISMOUNTING THE BALL BEARING ON THE NON DRIVE SIDE
1. Tap out the ball bearing on the non drive side with
a plastic hammer with slight hammer strokes onto
the axle.
2. Remove the ball bearing from the axle.
2.8 DISMOUNTING THE BALL BEARING AT THE DRIVE SIDE
1. Insert the short side of the axle through the second
ball bearing on the drive side.

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2. Put the installation cylinder onto the axle.
→By using the installation cylinder, the ball
bearing cannot tilt during disassembly. Damage
to the bearing seat is not possible.
3. Tap out the ball bearing with slight hammer strokes
on the axle.
4. Remove the installation cylinder from the hub.
5. Remove the ball bearing from the axle.

Ratchet LN - Technical Manual 11
2.9 CLEANING AND CHECKING ALL PARTS
1. Thoroughly clean all parts of the hub. The existing grease must be completely removed from the hub
body and from the ratchets.
2. Check the ratchets for wear.
The wear of the ratchets usually starts at the outer
circumference and shows itself by strongly attened
edges with uneven wear.
In case of heavy wear, the ratchets must be changed
immediately.
3. Check the internal teeth of the freewheel body for
wear.
If the black surface of the gearing is heavily worn (no
longer black but silver), if there are burrs or if material
has been removed, the freewheel body must be
replaced.

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2.10 MOUNTING THE BALL BEARING AT THE DRIVE SIDE
1. Grease the bearing seats and the thread of the ring
nut with universal grease.
2. Put the installation cylinder into the vise.
3. Insert the long side of the axle into the installation
cylinder.
4. Place the hub shell onto the tool and the axle.
5. Push a new bearing on the hub shell with the
colored side facing outwards.
6. Put the installation cylinder onto the bearing.
7. Tap in the ball bearing carefully with slight hammer
strokes.
8. Remove the installation cylinder from the hub.

Ratchet LN - Technical Manual 13
2.11 MOUNTING THE RING NUT
1. Grease the ball bearings on the drive side with
universal grease.
2. Clamp the ring nut tool in the deep position in the
vise.
3. Slide the ring nut onto the tool with the recess
facing upwards.
4. Insert the shim ring in the recess of the ring nut.
5. Place the hub on the tool.
6. Screw on the ring nut approx. 2 turns clockwise.
7. Remove the hub from the tool. 2x

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8. Unclamp the ring nut tool, turn it 90° and clamp it
back into the vise in the high position.
9. Put the hub back on the tool with the ring nut
screwed in.
10. Tighten the ring nut as rmly as possible by hand.

Ratchet LN - Technical Manual 15
2.12 MOUNTING THE BALL BEARING AT THE NON DRIVE SIDE
1. Clamp the tool for the ring nut in the vise.
2. Push the hub shell with the drive side onto the tool
for the ring nut.
3. Push the axle with the long side rst into the ball
bearing on the drive side.
4. Put on a new bearing on the non drive side with the
colored side facing outwards.
5. Put the installation cylinder onto the bearing.
6. Tap in the ball bearing carefully with slight hammer
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 non drive
side or loosen the bearing.
9. Repeat previous steps until the hub is turning
smoothly.

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2.13 ASSEMBLING THE FREEWHEEL SYSTEM AND THE FREEWHEEL BODY
DANGER
RISK OF INJURY DUE TO LIMITED FREEWHEEL FUNCTION DUE TO INCORRECT
LUBRICATION!
If too much grease is applied on the ratchets, the actuation of the ratchets may not work. The ratchets 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 the outer
and the inner toothing of the ratchets using a ne
brush.
→For an optimal functionality of the freewheel
system, a thin layer of grease is sufcient.
2. Grease the teeth of the freewheel body and the ring
nut with DT Swiss special grease.
3. Put the spacer onto the axle.

Ratchet LN - Technical Manual 17
4. Put on the rst spring.
→The spring must rest on the hub with its large
diameter.
5. Attach both ratchets and the second spring.
→The spring must rest with its small diameter on
the ratchet.
6. Put the freewheel body onto the hub.
7. Check if the freewheel body can be turned and if the
ratchets are engaging.
2.14 MOUNTING THE END CAP
1. Grease the ball bearing and the inside of the end
cap with universal grease.
2. Put on the end cap by hand.
Closing Steps: Link
Mount the brake rotor
Assembling the cassette

18
3. TROUBLE SHOOTING
Issue Reason Solution
Freewheel is blocked Spacer was forgotten during
assembly.
Check correct assembly, see “2.1
Overview”, page 5.
Spacer was compressed by
overtightening the thru axle.
Measure the length of the spacer. If
the spacer is shorter than 15.4 mm, it
must be replaced.
Freewheel does not engage /
slips
One or both ratchets are mounted
upside down.
Check correct assembly, see “2.1
Overview”, page 5.
Too much or wrong grease on the
ratchets.
Clean and grease ratchets, see “2.13
Assembling the freewheel system and
the freewheel body”, page 16.
Ratchets are worn. Replace ratchets.
One or both springs were
forgotten during assembly.
Check correct assembly, see “2.1
Overview”, page 5.
Hub has axial play Ball bearings were not mounted
correctly.
Check correct assembly, see “2.1
Overview”, page 5.
Ball bearings are worn out. Replace ball bearings.
Hub rotates stify Ball bearings are worn out. Replace ball bearings.
Ball bearing non-drive side driven
in too tight.
Check correct assembly, see “2.1
Overview”, page 5.
Mounting sequence of the ball
bearings not observed.
Hub makes noise Ball bearings are worn out. Replace ball bearings.
Notches from the cassette on
the freewheel body.
The steel cassette works itself
into the alloy web of the freewheel
body.
Remove bad notches from the rotor
using a le.
Freewheel body rotates with
difculty.
Ball bearings in the freewheel
body are worn out.
Replace freewheel body.
Freewheel is too noisy / too
quiet.
The perception of the freewheel sound is very subjective. While some
riders prefer a loud freewheel sound, other riders want a quiet freewheel.
In principle, the freewheeling sound can be inuenced by the amount of
grease between the ratchets. Less grease increases the freewheeling
sound, but at the same time leads to higher wear.

DT SWISS ASIA LTD.
No.5, Jingke 5th Rd., Nantun District
Taichung City 408
Taiwan (R.O.C.)
[email protected]
DT SWISS DEUTSCHLAND GmbH
Albert-Einstein-Strasse 3
59302 Oelde
Germany
[email protected]
DT SWISS POLSKA Sp. z o.o.
ul. Towarowa 36
PL-64-600 Oborniki
Poland
[email protected]
DT SWISS AG
Längfeldweg 101
CH - 2504 Biel/Bienne
[email protected]
DT SWISS, INC.
2493 Industrial Blvd.
USA - Grand Junction, CO 81505
[email protected]
DT SWISS (FRANCE) S.A.S.
Parc d‘Activites de la Sarrée
Route de Gourdon
F - 06620 Le Bar sur Loup
[email protected]
Subject to technical alterations, errors and misprints excepted.
All rights reserved.
© by DT SWISS AG
www.dtswiss.com
HXD10000003774S