User's Manual

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WUS MOTO Mounting process mode
Ref : C 307 020 0010
Version : E2
Details on WUS case displacement:
For a better understanding WUS holder is represented with a partial cut (orange area)
Now the screwdriver clutch is on the nut and the WUS holder has pushed down the WUS case.
There is a gap between the nut head and the WUS case (green arrow on scheme) so we can
start screwing without the nut touching the WUS case and damaging the WUS anti rotation
embossed shapes.
During screwing the nut must be pressed onto the rim, so it is the nut which achieves the
coaxiality of the assembly in the valve hole and not the valve seal.
10.3. STEP 3
In case of L-Valve rotation under screwing action, hold the valve during the screwing process
with a PTFE spanner to avoid marking and scratch onto the valve anodization.
LDL recommend to screw according the profile explained below :
 Screw the valve by hand till get contact between valve seal and external rim side (around
5 complete turns). Screwing by hand on at least 1 turn is also accepted for industrial
production.
 Screw the nut with a torque gun at constant speed :
No minimum, 50 rpm recommended , 100 rpm maximum , do not exceed 120rpm MAX
 FINAL TORQUE: 5 Nm ± 0.5 Nm
C3070200010-E2-WUS Mounting process mode.odt LDL Technology SAS
24/ 24 Toulouse – France
Copyrights 2016
Torque gun speed , in RPM
110 120
0
50
100
Screwing tool
Atlas Copco reference
LUM12 HRX8-50
LUM12 HRX8-110