Würth 1952 003 645 Manual Del Usuario página 13

Screw the 5 support bolts with the long thread on one side, included
in the tool set, to the axle through the disc's holes into the threaded
couplings of the bearing's housing. (Fig. 10+11)
Screw the 5 tension bolts present in the tool set into the disc's thread
according to the size of the thread: M10x1.5 and/or M12x1.5.
(Fig. 12+13)
Warning: in some circumstances, you should first clean the
thread with a suitable male tap.
Push the support plate onto the tension bolts until it is on the support
bolts. (Fig. 14) Fit the coupling plate of the impact screw and secure
it with the U washer and the nut. (Fig.15)
Lubricate the impact screw's thread using the grease provided
(Fig.16) and screw it into the coupling plate. Then place the impact
wrench on the hexagon of the impact screw. (Fig. 17)
IMPACT SCREW FUNCTION
The impact screw is screwed by hand until it is on the support plate.
Force is exerted by using the impact wrench and an appropriate
hammer or mallet (about 1 to 2 kg). (Fig. 18) Once sufficient force
has been exerted, use the hammer to hit the end of the screw
directly, therefore generating the loosening torque. The striking pin
is housed in a movable manner inside the screw's hollow body.
(Fig. 19)
Warning: the pin can only be inserted a few millimeters until
it reaches limit stop. After slightly loosening the component,
the screw is tightened and the procedure can be repeated
until it is fully loosened.
Remove the screw, the coupling plate, the support plate, the tension
bolts and the support bolts (Fig. 20) and then remove the assembly
completely from the bearing's housing, the brake disc and the hub.
(Fig. 21)
LOOSEN THE BRAKE DISC
Position the assembly with the bearing facing upwards. (Fig. 22)
Screw the 5 tension bolts into the disc's thread from behind, based
on the size of the M10x1.5 and/or M12x1.5 thread (Fig. 23+24),
and then position the support plate. (Fig. 25)
Position the screw's coupling plate on the tension bolts and fix with
the U washer and the nut. (Fig. 26) Then screw the screw all the
way (Fig. 27) and continue until the rusty disc is loosened from the
hub (Fig. 28) so that you can remove it. (Fig. 29)
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