HP Velotechnik trikes - Manual (Page 67)

Wheel alignment
63
Handling instructions
Setting of camber- and caster angle on full suspension tricycles
Setting of camber angle on Scorpion fs,
Scorpion fs 26 /Enduro /S-Pedelec,
Scorpion plus 20 and Scorpion plus 26
(informations for bicycle mechanics)
The McPherson axle on the full suspension
tricycles is equipped with adjustable
wishbones. By adjusting the rod ends on the
wishbones, the required axle specifications
can be met. During assembly in our factory,
the front axle was adjusted correctly. In case
of replacement of worn-out or damaged parts
the front axle needs to be readjusted. In
unloaded condition, the following adjustment
values must be met:
x toe setting: 2–4 mm toe-in
x camber angle: +0,5° (+0,5°/-1,5°)
x max. difference in camber angle le./ri.: 0,5°
x caster angle: 76,7° (+/-1°)
For measuring, the tricycle must stand on a
plane, non-inclined floor.
To measure the caster angle, the front wheels
must point straightforward. Attach a protrac-
tor to the front side of the fender bracket.
Align the protractor perpendicular to the
ground. Make sure the protractor only
touches the fender bracket and not the
frame’s headtube.
To measure the front wheel's camber angle
position a long square next to the wheel con-
cident with the wheel axis. Set the lower dis-
tance between rim wall and square to 40 mm
(u
s
= 40 mm). The upper measure so between
rim wall and square should be 36 mm
(+0,5°positive camber) now and must be in a
range of 32 (+1° positive camber) to 48 mm (-
1° negative camber). The difference between
the measure so on the left and right wheel
must not exceed 4mm.
Caution! Always check the front
axle specifications after accidents or unin-
tended events such as riding through a
deep road hole or contact with the curb at
higher speed as well as after replacing axle
components. An incorrect adjustment can
lead to increased tire wear and uncontrol-
lable handling.
For adjusting works, the tricycle should be
mounted in a work stand, best upside down.
The stabilizer bar must be disassembled.
To adjust the front axle both rod ends of one
wishbone must be disassembled from the
frame. Loosen the counter nuts and screw in
or out the rod ends according to the table on
the left. Values in between can be interpo-
lated.
Check the values after provisionally reattach-
ing the wishbone and wheel on a plane floor.
Repeat the adjustment if necessary.