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When mounting the caster wheel fork with
screw-on axle, insert the caster wheel axle
back into the caster wheel bearing block, use
the supplied wrench to tighten up the nut of the
caster wheel axle again (hold the caster wheel
axle firmly) and secure it with thread lock.
The nut of the caster wheel axle may not be
tightened up more than 3 Nm to ensure it runs
smoothly. In case more sluggishness is
desired, this can be achieved using a higher
tightening torque.
23.3.3 Caster wheel forks with quick-
release axle
To remove the caster wheel fork with a
quick-release axle, a locking knob between the
caster wheel and the caster wheel fork's inner
side is used. Grasp around the caster fork and
press the locking knob with your thumb. The
caster wheel fork can now be pulled out.
Locking knob on
inside of fork
Figure 94: Caster wheel fork with quick release axle
and locking knob
To mount the caster wheel fork with a quick-
release axle, press the locking knob again and
insert the caster wheel axle back into the
caster wheel bearing block. When doing this,
pay special attention to ensure that the locking
knob springs all the way out again after
attaching the wheel, otherwise the wheels are
not properly secured. You will know that if you
can see the index groove (Fig. 57).
37
Operating instructions SPEEDY F4 & F2
23.4 Adjusting the caster wheel axles
(when fitted in angle-adjustable
caster-wheel bearing blocks)
To ensure that the product has good properties
when steering and driving straight ahead, the
caster wheel axle should be adjusted to be
vertical to the level ground.
Adjustments on the caster wheel axles can be
required for the following reasons:
The tipping point and/or sitting heights
have been changed.
The caster wheel axles are no longer
vertical due to a fall or an impact.
The flattering of the caster wheels should
be reduced.
To adjust the caster wheel axle, the product
should be placed on a level surface and the
wheel track of the drive wheels must have
already been adjusted (see chapter 22.2).
Now check to see if the caster wheel axles are
standing vertically to the level ground. For this
purpose, place an angle with height adjustable
slider on the front edge of the caster wheel
bearing blocks. The slider should be aligned at
the middle of the caster wheel bearing block.
If the front edges of the caster wheel
bearing blocks are vertical to the level ground,
then the caster wheel axles are also doing this.
Observe that the front edges of the caster
wheel bearing blocks are slightly rounded.
Thus, the distance above and below between
the slider of the angle and the front edge of the
caster wheel bearing blocks must be the same
size.
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