INSTRUCTIONS FOR:
CAMBER/CASTOR MAGNETIC GAUGE
Model No: GA45
Thank you for purchasing a Sealey product. Manufactured to a high standard this product will, if used according to these instructions
and properly maintained, give you years of trouble free performance.
IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONALREQUIREMENTS, WARNINGS & CAUTIONS.
USE THE PRODUCT CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE
DAMAGE OR PERSONAL INJURY, AND WILL INVALIDATE THE WARRANTY. PLEASE KEEP INSTRUCTIONS SAFE FOR FUTURE USE.
1. SAFETY INSTRUCTIONS
p WARNING! Ensure Health & Safety, local authority, and general workshop practice regulations are adhered to when using this
equipment.
3 Maintain the gauge in good condition (use an authorised service agent).
3 Replace or repair damaged parts.
p WARNING! Use the gauge on level and solid ground.
7 DO NOT allow untrained persons to use the gauge.
p WARNING! When setting front-end alignment on commercial vehicles never make adjustments to drop arms or interconnecting
links. Doing so could result in serious tyre, wheel and steering problems.
3 Any alignment changes deemed necessary as a result of using this equipment must be made strictly in accordance with the
vehicle manufacturers recommendations.
2. INTRODUCTION & SPECIFICATION
Robust, magnetic gauge mounts onto hub or brake disc for quick and accurate measurement of camber and castor angles. Large
adjuster knob for convenient zeroing of bubble during castor angle measurement. Graduated from +6° to -6°.
3. MEASURING CAMBER ANGLE
NOTE: Before proceeding to check the camber, first calibrate your gauge using one of the following methods:
a. Clamp a good quality spirit level, with transverse bubble, so that the long faces are vertical.
Place the magnetic face of the gauge onto the vertical face of the spirit level and adjust the gauge thumbscrew until
the gauge bubble is centred on the 0° mark.
b. Use a known true vertical surface to place the gauge against and adjust the bubble to zero.
NOTE: You must have a flat machined surface at 90° to the spindle in order to use this gauge. If using the brake discs ensure
there are no ridges and that the discs have even wear. Preferably use new discs.
3.1 To Check Camber With Wheels On.
3.1.1 Ensure your vehicle is parked on a flat level surface, the tyres are inflated to the correct pressure and the rear wheels
are chocked.
3.1.2 Having removed any wheel trims, place a straight bar across two flats of the wheel trying to keep as close to the 6
oclock position as possible (Fig. 1). Ensure the wheel has no dents where you are placing the bar.
GA45 - 1 - 220805
Fig. 1
Place Camber
Gauge Here
3.1.3 Place the gauge in the centre of the bar and note the reading on the camber gauge bubble, this will be your camber
angle.
3.1.4 Repeat the procedure for the opposite wheel.
NOTE: Always read the centre of the bubble.
NOTE: On some vehicles you will be able to attach the gauge directly to the wheel hub, this is the prefered method (Fig. 2).
NOTE: Try to simulate normal running conditions, ie. half a tank of fuel and a weight similar to the driver in the front seat.
3.2 Measuring The Camber Angle With The Wheels Off
NOTE: The car sills must be close to the same height as they would be with the wheels on and the wishbone must be exactly
the same height as it would be with the wheels on.
3.2.1 Having got the vehicle to a position where the wheels have been removed and the sills are at the same height that
they would be with the wheels on (ensuring adequate steps have been taken to secure the vehicle, axle stands etc), use
a jack to carefully raise the wishbone to the same height as it was with the wheels on.
3.2.2 When the wishbones are at the correct height, simply use the magnetic base on the camber gauge to attach it to the
brake disc.
3.2.3 Ensure the hubs are in the dead ahead position and take the reading from the centre of the camber gauge bubble. This
is your camber angle.
3.2.4 Repeat the above operation for the other hub.
NOTE: Refer to the owners handbook before making any adjustments.
Place Flat Bar
Here
Fig. 2
It is
preferable to
place the
gauge directly
on the hub if
you have a
flat even
surface that
will provide a
good fit for
the gauge
4. MEASURING CASTER ANGLE
4.1 To Check Castor
4.1.1 Use the same setup procedures as outlined above for camber
angles.
4.1.2 Turn the wheels 20° from dead ahead, the wheel you will measure
will be the wheel that has the front of the tyre facing away from the
car.
4.1.3 Place the gauge against the wheel again using a level surface at
90° to the wheel spindle and adjust the bubble so that it is
dissected by the zero° mark.
4.1.4 Turn the wheels 20° the other way (a total of 40°).
4.1.5 Take a reading, and this will be your castor angle.
NOTE: When taking measurements ensure the gauge is level (the bubble
vial uppermost).
NOTE: Any adjustments you make to either castor or camber angles may
affect the other, so re-check all measurements after any adjustments
have been made.
We recommend the use of turntables Model No. GA44 when checking the
caster as this will enable you to accurately set the wheels at 20°
NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice.
IMPORTANT: No liability is accepted for incorrect use of this product.
WARRANTY: Guarantee is 12 months from purchase date, proof of which will be required for any claim.
INFORMATION: For a copy of our catalogue and latest promotions call us on 01284 757525 and leave your full name, address and postcode.
Sole UK Distributor
Sealey Group,
Bury St. Edmunds, Suffolk.
01284 757500
01284 703534
www.sealey.co.uk
Web
sales@sealey.co.uk
email
GA45 - 1 - 220805
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