Ref.: MEL-WA(3D HCV) - OM Ver.1.7
42
Using Frame reference gauge, the centre line of Truck chassis is identified
(Refer blue line) by capturing the readings at all 4 positions. The mis-aligned
Drive axle (B2) is indicated in Red line
Adjust the Drive axle (B2) towards the chassis centre line (Blue line). Followed
by this, adjust the remaining axles also with reference to the chassis centre
line as per on-screen guidance. Now, all axles are aligned with respect to
frame (Chassis).
1.
It is vital to collect the required information / complaint on the vehicle being
aligned from vehicle owner prior to diagnosis for conducting a perfect alignment.
2.
Perform a test drive to verify owner‟s complaint.
3.
Ensure that Top plate of Rotary plates is locked with locking pins.
4.
Ensure the Rotary plates are without sag or tilt while moving the vehicle over the
Rotary plate.
5.
Ensure the Rotary plate pit spacer and Segment plates are without shake and
with fits compactly. Pit gap to be filled with spacer without any gap in front and
rear side. Filling spacer level to be equal with rotary plate top plate.
6.
The Vehicle wheel rolling area should not have any undulations. This will affect
the true Runout measurement.
7.
The Vehicle should not be jerked while acquiring the data i.e., a STOP symbol
will be displayed on the screen.
Fig. 63
8.
Position the vehicle on Alignment pit as explained below:
For Multi-Axle vehicle, both the Front axle wheels should rest on exact
centre of Rotary plates as well as center of pit for twin steer axle.
For Trucks with 1 Front axle & 1 Rear axle having Wheel base more than
4mtr, park the Front steer axle at 1
st
Rotary plate.
Fig. 64
NOTE:
Use F1 Target plates for Front axle wheels & B1 Target plates
for Rear axle wheels.
