1. No category

Glossary
Term
Description
Adjustment
Method whereby the slack adjuster maintains the correct clearance.
Alpha Angle
The angle of the control arm in fitting position.
Anchor Bolt
Used to attach the fixed point to the vehicle.
Anchor Point
The bracket, attached to the vehicle which connects to the control arm of th
Body
The part of the adjuster which houses the mechanism and extends to hold
Bracket Kit
Loose parts supplied with Fast-Fit automatic slack adjusters.
Casting
The part of the adjuster which houses the mechanism and extends to hold
Casting Number
Identification number for each body type, marked in relief on the casting.
Clearance
The distance between brake lining and drum.
Clearance Sensing Principle
Where the clearance is maintained by measuring wear, but not elasticity, in
Clevis Bush
The bush in the slack adjuster body where the air chamber is connected to
Control Arm
The rotating arm, which connects the cover plate to the anchor point.
Control Unit
The specific cover plate, control arm and alpha angle combination for a par
Control Unit number
Identification number for the specific combination of control arm and alpha
Cover Plate
The metal pressing which is screwed to the body to protect the mechanism.
Crank / Inclination
With the cover plate facing and the hex nut on your left, this is the angle of
Crank / Offset
The amount of offset (+/-) the centre of lever arm is from the centre line of t
Elasticity
The combined give in the parts of the foundation brake system when full br
European Type
Slack adjuster as fitted to European manufactured vehicles
Excess Clearance
Additional distance between lining and drum caused by wear.
Fitting Kit
Loose parts supplied with US type slack adjusters for fitment to the vehicle
Fixed Point
The bracket, attached to the vehicle which connects to the control arm of th
Grease Nipple
Located on the body and used to supply lubrication to the inner mechanism
Grommet
Plastic insert housed in certain control arms.
Hex Nut
The nut (12mm for European ASA, 1/2" for North American ASA) which is r
ID
The internal diameter of the clevis bush.
Lining Gap
The distance between brake lining and drum.
Manual Slack Adjuster (MSA)
A Slack Adjuster which needs regular adjustments to maintain the correct c
Mechanism
The internal workings of a slack adjuster which determine how the clearanc
North American Type
Slack adjuster as fitted to North American manufactured vehicles.
OEM Reference
Vehicle Manufacturers own part number for the slack adjuster.
Offset
With the hex nut facing this is the distance between the centre of the worm
Peg Bolt
Used to attach the fixed point to the control arm where the control arm inco
Pre-Set Clearance
The distance between brake lining and drum when no wear has been introd
Radius
The distance from centre of worm gear to the clevis hole.
Repair Kit
Parts of the internal mechanism used to recondition an automatic slack adj
Self-Setting Slack Adjuster
An(S-ASA)
Automatic Slack Adjuster which will work correctly whatever the starting
Slack Adjuster
Brake lever which forms the link between the air chamber and the foundati
Spline
The number of mating teeth of the worm gear and camshaft.
Stroke Sensing Principle Where the clearance is maintained solely by measuring the length of stroke
Wear Indicator
Pointer which is fixed to, and rotates with, the camshaft estimating brake lin
Worm Gear
The mating part to the brake camshaft.
Worm Shaft
Part of the mechanism which extrudes from the body forming a hex nut.
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Glossary
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