DT SWISS RATCHET EXP Manuel utilisateur

RATCHET EXP HUBS
TECHNICAL MANUAL
V2020.07

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 Using this manual ....................................................................................................... 4
1.7 General maintenance information.............................................................................. 4
1.8 Environmental protection............................................................................................ 4
1.9 Exclusion of liability..................................................................................................... 4
1.10 Warranty....................................................................................................................... 4
2. MAINTENANCE OF THE REAR WHEEL HUB WITH RATCHET EXP®SYSTEM.......5
2.1 Overview....................................................................................................................... 5
2.2 Required Tools ............................................................................................................. 6
2.3 Required wearing parts and materials....................................................................... 7
2.4 Removing end caps, freehub body and freewheel system......................................... 8
2.5 Dismounting the bearing on the non drive side......................................................... 9
2.6 Dismounting the threaded ratchet ............................................................................. 10
2.7 Dismounting the bearing from the threaded ratchet................................................. 11
2.8 Checking the sealing................................................................................................... 12
2.9 Cleaning and checking all parts ................................................................................. 12
2.10 Pressing the bearing into the threaded ratchet......................................................... 13
2.11 Screwing the threaded ratchet with the bearing into the hub shell.......................... 13
2.12 Mounting the bearing on the non drive side............................................................... 14
2.13 Mounting the sealing................................................................................................... 16
2.14 Mounting the freewheel system.................................................................................. 17
2.15 Putting on the freewheel body and the end caps....................................................... 19
2.16 Checking the function ................................................................................................. 19

Ratchet EXP - Technical Manual 3
1. GENERAL
1.1 VALIDITY
This manual describes the component specied on the front page and the footer. It is valid for the
construction level of the component on the 29.07.20. Deviations are possible and all items are subject to
technical changes.
1.2 SAFETY
The safety instructions are classied 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.
NOTE
… 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 denitely contact a specialist or a DT Swiss Service Center. If the work is not carried out properly, any
warranty claims expire.
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. On the back you will nd the DT Swiss contact details. 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 USING THIS 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 specied, moving parts, threads, O-rings and seals must be greased before assembly.
CLEANING
For an optimal result of the maintenance works, 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 sealings
requires mild cleaners. Observe the instructions for use of the respective cleaning agent.
DT Swiss recommends the following cleaning products:
• 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 conditions of the tools are perfect Always keep the
tools in their original packaging or adequate devices to save them from damages.
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 sufcient specialist knowledge.
The user is liable for any damage or consequential damage caused by wrong maintained or wrong installed
components. If you have doubts, please contact your allocated DT Swiss pro level service center.
1.10 WARRANTY
Warranty conditions, see www.dtswiss.com

Ratchet EXP - Technical Manual 5
2. MAINTENANCE OF THE REAR WHEEL HUB WITH RATCHET EXP®SYSTEM
2.1 OVERVIEW
12
3
45678910 11
12 13
1 end cap non drive side 6 threaded ratchet 11 washer
2 bearing non drive side 7 sealing 12 freewheel body
3axle 8 spacer 13 end cap drive side
4 hub shell 9 loose ratchet
5 bearing drive side 10 spring

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2.2 REQUIRED TOOLS
Tool Specication Quantity Article number
tool kit*, consisting of: 1 HWTXXX00N2544S
installation cylinder Ø15 x 24 x 60 mm
(only required for ball bearings on the
non drive side of 180 hubs)
1 HXTXXX00N5025S
installation cylinder Ø15 x 26 x 40 mm 1 HXTXXX00N5314S
mounting / dismounting tool for the
threaded ratchet 1 HXTXXX00N8387S
mounting / dismounting tool bearing
drive side 1 HXTXXX00N6106S
mounting tool sealing 1 HXTXXX00N5026S
* The tool kit can be purchased as a complete set or the included tools separately.

Ratchet EXP - Technical Manual 7
2.3 REQUIRED WEARING PARTS AND MATERIALS
wearing parts / materials Specication Quantity Article number
DT Swiss universal grease 20 g HXTXXX00NMG20S
DT Swiss special grease 20 g HXTXXX00NSG20S
ball bearing for 180 hubs:
• drive side
1526 Ø15 x 26 x 7 mm
1 HSBXXX00N3741S
• non drive side
6802 Ø15 x 24 x 5 mm 1 HSBXXX00N2464S
ball bearing for 240 hubs:
Drive side / non drive side
1526 Ø15 x 26 x 7 mm
2 HSBXXX00N3741S
sealing 1 HSOXXX00N1031S
spacer HRDXXX00N8242S
service kit 36 teeth consisting of:
• loose ratchet 36T
• threaded ratchet 36T
• spring
• spacer
• DT Swiss special grease
1 HWYXXX00N0042S
service kit 54 teeth consisting of:
• loose ratchet 54T
• threaded ratchet 54T
• spring
• spacer
• DT Swiss special grease
1 HWYXXX00N9376S

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2.4 REMOVING END CAPS, FREEHUB BODY AND FREEWHEEL SYSTEM
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 vice with
ground clamping jaws and pull the hub / wheel
upwards.
2. Pull the freewheel body off the hub carefully.
3. Pull the spacer off the axle.

Ratchet EXP - Technical Manual 9
4. Remove the spring, ratchet and the washer
from the freewheel body.
2.5 DISMOUNTING THE BEARING ON THE NON DRIVE SIDE
1. Tap out the bearing on the non drive side
with slight hammer strokes onto the axle
using a nylon hammer.
2. Remove the bearing from the axle.

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2.6 DISMOUNTING THE THREADED RATCHET
Due to the torque which acts on the threaded ratchet during pedaling, the threaded ratchet
tightens during riding. We recommend loosening the ratchet only when the wheel is complete as
the lever is much larger.
1. Clamp the mounting / dismounting tool for
the threaded ratchet into the vice.
2. Fit the hub or wheel onto the tool in such a
way that the teeth of the tool engage in the
teeth of the threaded ratchet.
3. Insert the axle into the hub and through the
threaded ratchet.
HXTXXX00N8387S
4. Put the installation cylinder onto the non
drive side of the hub.
5. Loosen and screw off the ratchet by turning
the hub counterclockwise.
6. Remove the hub from the tool. HXTXXX00N5314S/
HXTXXX00N5025S
7. Remove the ratchet with the bearing.
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