3. SPECIFICATION
Model No: . . . . . . . . . . . . . . . . . . . . . . . . GA70.V2
Minimum Rim Diameter . . . . . . . . . . . . . . . .330mm
Maximum Rim Diameter. . . . . . . . . . . . . . . .560mm
Optional Accessory: . . . .
GA70CR
- Calibration Rig (Sold Seperately)
4. FOUR WHEEL ALIGNMENT
4.1.
Accurate four wheel alignment should always take place with
reference to
the vehicles centre line to avoid problems similar to the one shown in (fig.1)
where the vehicle will steer to the left resulting in the steering wheel
having to be turned to the right to compensate. Basically, rear wheel tracking
must be kept equal to the centre line and correctly toed in or out according
to the vehicle manufactures specification in order for the vehicle to handle
correctly. Check thrust lines are equal to centre line before proceeding.
5. OPERATION
IMPORTANT:
Prior to use, check that the tyre pressures are correct and if
wheel covers are fitted, remove them. Ensure that the vehicle is on a
smooth level surface with the wheels pointing straight ahead.
DO NOT
reverse the vehicle into position, but drive straight ahead into position. Ideally
vehicle should be on a ramp or lift for easier access to the track rods, if
adjustment is necessary.
5.1. FRONT TO REAR WHEEL ALIGNMENT
5.1.1. Place both dished turn plates in front of the front wheels, with their curve
facing downwards. Drive the vehicle onto the turn plates, ensuring they are
central to the wheels (fig.2).
5.1.2. Set steering wheel in straight ahead position and lock using the steering wheel clamp
(fig.3).
5.1.3. Hang both laser measuring heads on the front wheels with toe scales positioned to the
front of the vehicle (fig.4).
NOTE:
Extension bobbins are used for vehicles that have dished wheels (eg 4x4 or
vans) where the silver bobbins won’t reach onto the wheel rim. The Extension
Bobbins fit over the silver bobbins to give an extra 40mm of reach.
NOTE:
use 13” Wheel Spacers under the Laser Measuring Heads when necessary.
5.1.4. Hang the alignment assembly flags onto the top of the rear tyres and make adjustments,
so that the horizontal bar is sitting at approximately the centre of the wheel and touching
the tyre at both ends. Ensure that the scale is at 90° to the wheel. Check the spirit level to
ensure the correct position is achieved (fig.5).
5.1.5. Turn on both front laser measuring heads, then
look to rear flags (fig.6) there will be a reading on
both sides, (the readings may not be the same). If
there are two different readings on the rear flags,
adjust both front track rod ends, ensuring that the
front wheels are in line with the rear.
5.1.6. The first step to achieving this, is to add both rear
scale readings together and divide by 2.
5.1.7. For example:
5.1.8. N/S/R reading 2 O/S/R reading 4 (2 + 4 = 6 ÷ 2 = 3)
5.1.9. Adjust both front track rod ends until 3 on both rear
flags is achieved.
GA70.V2 | Issue 2 06/06/2019
Original Language Version
© Jack Sealey Limited
fig.1
fig.2
fig.3
fig.4
fig.5
fig.6
