Bosch WBE 4510, Original Instructions Manual

Page: 53 / 363

1 695 655 163 2010-07-17
|
Robert Bosch GmbH
Unbalance minimization | WBE 4510 | 53 en
10. Unbalance minimization
If the unbalance measured at the wheel is extremely
high (e.g. static unbalance >50 g) it is advisable to
implement the "
Unbalance minimization " program.
The program permits minimization of the total unba-
lance by providing compensation for the static unba-
lance of the tire by way of that of the rim.
From the " Balancing page ", press <
r
> (4x).
" Unbalance minimization " is opened.
!
Work as accurately as possible throughout the entire
procedure!
i
Follow the instructions shown on the monitor.
PHASE 1 to PHASE 4:
1.
Press < OK >.
The wheel guard closes automatically.
The unbalance measurement commences automa-
tically.
2.
Turn the wheel until the valve is in the 12 o'clock
position.
3.
Press < OK >.
The reference position of the wheel on initial star-
ting is stored.
4.
Make a reference mark on the tire (corresponding to
the position of the valve).
5.
Detach the wheel from the flange.
6.
Turn the tire on the rim through 180 degrees.
i
The mark previously made provides a guide.
7.
Secure the wheel.
8.
Turn the valve to the 12 o'clock position.
9.
Press < OK >.
The new position of the wheel on the fl ange is
stored.
10.
Press < OK >.
The wheel guard closes automatically.
The unbalance measurement commences automa-
tically.
Values obtained:
$
Rim unbalance
$
Current unbalance
$
Tire unbalance
$
Minimum possible unbalance
i
After studying the values, further unbalance minimi-
zation is required (PHASE 5 to 7).
PHASE 5 to PHASE 7:
1.
Turn the wheel until the squares on the monitor are
centered.
2.
Mark the tire at the 12 o'clock position.
3.
Press < OK >.
4.
Detach the wheel from the flange.
5.
Turn the tire on the rim until the mark coincides with
the position of the valve.
6.
Secure the wheel.
7.
Turn the valve to the 12 o'clock position.
8.
Press < OK >.
The new position of the wheel on the fl ange is
stored.
i
To turn the tire on the rim it may be necessary to
deflate the tire, unseat it again and re-inflate after
turning.
9.
Press < OK >.
The wheel guard closes automatically.
The unbalance measurement (test run) commen-
ces automatically.
i
If the test run is to be repeated, the monitor displays
an appropriate message. In this case, continue again
with minimization (PHASE 5 onwards).
"
On completion of the test run, the unbalance is automa-
tically compared to the minimum residual unbalance
value. If the difference between these two values is
below the maximum permissible level, the tire and rim
are optimally matched.
10.
Press < OK >.
Return to " Balancing page ".
i
If the test run is not properly completed, the entire
procedure (as of PHASE 1) must be repeated.
11.
Press < OK >.
Return to " main page ".