CAMPAGNOLO Ekar RD21 User manual
CAMPAGNOLO.COM
REPLACING THE JOCKEY CAGE OF THE
REAR DERAILLEUR (RD21-EK13)
REPLACING THE JOCKEY CAGE - Rev. 01/ 06-2021 CAMPAGNOLO COMPONENTS - TECHNICAL MANUAL
2
Always wear protective gloves and glasses while working on the bicycle.
WARNING!
REPLACING THE JOCKEY CAGE - Rev. 01/ 06-2021 CAMPAGNOLO COMPONENTS - TECHNICAL MANUAL
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REPLACING THE EKAR JOCKEY CAGE
THIS TECHNICAL MANUAL IS INTENDED FOR USE BY PROFESSIONAL MECHANICS.
Anyone who is not a qualied professional for bicycle assembly must not attempt to install and operate on
the components independently due to the risk of carrying out incorrect operations which could cause the
components to malfunction, resulting in accidents, physical injury or even death.
The actual product may dier from what is illustrated, as the specic purpose of these instructions is to
explain the procedures for using the component.
1.1 - TOOLS REQUIRED
ALLEN WRENCH TORX WRENCH T15
FIXED WRENCH FIXED WRENCH
3
mm
8 mm
8 mm
30 mm 8 mm
T15
Tools supplied by other manufacturers for components similar to Campagnolo®components, may
not be compatible with Campagnolo®components. Likewise, tools supplied by Campagnolo s.r.l.
may not be compatible with components supplied by other manufacturers. Always check with your
mechanic or the tool manufacturer to insure compatibility before using tools supplied by one manu-
facturer on components supplied by another.
!
1 - DISASSEMBLING THE EKAR REAR DERAILLEUR JOCKEY CAGE
(RD21-EK13)
The operations described in this procedure are only applicable to jockey cage
code RD21-EK13.
REPLACING THE JOCKEY CAGE - Rev. 01/ 06-2021 CAMPAGNOLO COMPONENTS - TECHNICAL MANUAL
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1) Grasp the body and rotate the jockey
cage anti-clockwise until the screw is visible
(A - Fig.1).
2) Keeping the jockey cage locked, remove
the screw (A - Fig.2).
3) Accompany the jockey cage until the
spring is completely unloaded (Fig. 3).
WARNING!
Left-hand thread.
WARNING!
The rear derailleur is spring-loaded
and will quickly return to its starting
position.
Pay special attention when accom-
panying the jockey cage and keep
your fingers well away from points
at risk of crushing.
4) Remove the clutch cover (Fig.4 / Fig. 5).
WARNING!
Left-hand thread.
Fig.1 Fig.2
3
mm
Fig.4 Fig.5
8 mm
30 mm
Fig.3
REPLACING THE JOCKEY CAGE - Rev. 01/ 06-2021 CAMPAGNOLO COMPONENTS - TECHNICAL MANUAL
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5) Remove the jockey cage fixing nut (Fig.6
/ Fig.7).
6) Use a T15 Torx wrench to remove the
nut on the jockey cage side, acting on the
clutch shaft (Fig.8 / Fig.9).
7) Remove the jockey cage and the sealing
ring (Fig. 10).
Fig.6 Fig.7
8 mm
Fig.8 Fig.9
T15
Fig.10
REPLACING THE JOCKEY CAGE - Rev. 01/ 06-2021 CAMPAGNOLO COMPONENTS - TECHNICAL MANUAL
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2 - ASSEMBLING THE EKAR REAR DERAILLEUR JOCKEY CAGE
(RD21-EK13)
2.1 - TOOLS REQUIRED
Tools supplied by other manufacturers for components similar to Campagnolo®components, may
not be compatible with Campagnolo®components. Likewise, tools supplied by Campagnolo s.r.l.
may not be compatible with components supplied by other manufacturers. Always check with your
mechanic or the tool manufacturer to insure compatibility before using tools supplied by one manu-
facturer on components supplied by another.
!
Campagnolo spare parts must only be installed by qualied personnel with specialised knowledge, suitable
tools and sucient experience and who carefully follow the installation instructions. Failure to comply with
the above could result in product malfunctions, accidents, physical injury or death.
WARNING!
ALLEN WRENCH INSERT FOR ALLEN WRENCH
TORX WRENCH T15 INSERT FOR TORX WRENCH T15
TORQUE WRENCH INSERT FOR
TORQUE WRENCH
FIXED WRENCH
3
mm
8 mm
30 mm
T15
3
mm
T15
8
mm
REPLACING THE JOCKEY CAGE - Rev. 01/ 06-2021 CAMPAGNOLO COMPONENTS - TECHNICAL MANUAL
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1) Insert the sealing ring, making sure it is
positioned correctly (Fig.1).
2) Apply “Loctite 2701” (Fig.2) to the clutch
shaft.
3) Install the jockey cage, hooking the spring
in the corresponding hole on the jockey
cage itself (Fig. 3).
4) Install the nut on the jockey cage side by
acting on the clutch shaft (Fig. 4).
Using a T15 Torx wrench, tighten to a torque
of 8 Nm (Fig.5).
Fig.1
Fig.2
Fig.3
Fig.4 Fig.5
T15
8 Nm
REPLACING THE JOCKEY CAGE - Rev. 01/ 06-2021 CAMPAGNOLO COMPONENTS - TECHNICAL MANUAL
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6) Install the jockey cage fixing nut (Fig.7 /
Fig.7).
Tighten to a torque of 2.5 Nm (Fig.8).
5) Apply “Loctite 2701” (Fig. 6) to the jockey
cage fixing nut.
WARNING!
Observe the tightening torque.
A higher tightening torque could
damage the components inside the
rear derailleur, causing it to malfun-
ction.
7) Apply “Loctite medium 243” to the cover
(Fig.9).
8) Screw on the cover by hand (Fig.10).
9) Use an open-end spanner to tighten
the cover until a certain resistance is felt
(Fig.11).
WARNING!
Left-hand thread.
Fig.7 Fig.8
8
mm
Fig.6
Fig.9
Fig.10 Fig.11
8 mm
30 mm
2 Nm
2,5 Nm
REPLACING THE JOCKEY CAGE - Rev. 01/ 06-2021 CAMPAGNOLO COMPONENTS - TECHNICAL MANUAL
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10) Load the spring by turning the
jockey cage ONE (360°) complete turn
counterclockwise (Fig. 12).
WARNING!
The rear derailleur is spring-loaded
and will quickly return to its starting
position.
Pay special attention when accom-
panying the jockey cage and keep
your fingers well away from points
at risk of crushing.
11) Install the jockey cage end-stop screw
and, using a 3 mm Allen wrench, tighten the
screw to a torque of 1 Nm (Fig.13).
WARNING!
Left-hand thread.
Fig.13
3
mm
1 Nm
Fig.12
360°
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