Operation (Air and vacuum systems): pre-2018 MOT
This is pre-2018 MOT wording. The defect categories changed on 20 May 2018.
Now called Operation (Air and vacuum systems).
4 pre-2018 fail items.
| Old wording | Inspection manual | Now |
|---|---|---|
| Operation has insufficient reserve pressure/vacuum to provide assistance for at least two more brake applications after the warning lamp or other device has operated | Insufficient pressure or vacuum to give assistance to brakes for at least two or more applications after the warning light or other device has operated | Operation has insufficient reserve pressure/vacuum to provide assistance for at least two more brake applications after the warning device has operated (or gauge shows an unsafe reading) (dangerous) |
| Operation has insufficient reserve pressure/vacuum to provide assistance for at least two more brake applications after the gauge has reached the warning mark | Insufficient pressure or vacuum to give assistance to brakes for at least two or more applications after the gauge has reached the warning mark | Operation has insufficient reserve pressure/vacuum to provide assistance for at least two more brake applications after the warning device has operated (or gauge shows an unsafe reading) (dangerous) |
| Operation stored air pressure or vacuum depletes when ancillary equipment is operated | The repeated operation of any ancillary air or vacuum system completely depletes the stored air or vacuum for the braking system. | Operation stored air pressure or vacuum depletes when ancillary equipment is operated (major) |
| Operation does not operate a brake fitted to each wheel | on vehicles first used on or after Jan 1968 a brake is not applied to all the wheels | Operation has insufficient reserve pressure/vacuum to provide assistance for at least two more brake applications after the warning device has operated (or gauge shows an unsafe reading) (dangerous) |
Current names are the closest match by wording and part. The DVSA publishes no official old-to-new table.
Other pre-2018 parts in Brakes
- Abs (9)
- Additional braking devices (19)
- Cylinders/actuators (17)
- Hoses (Air and vacuum systems) (16)
- Pipes (Air and vacuum systems) (13)
- Pump/compressors (14)
- Reservoirs (Air and vacuum systems) (15)
- Servos (Air and vacuum systems) (17)
- Valves (Air and vacuum systems) (20)
- Leaks (Air and vacuum systems) (1)
- Pressure/vacuum build up (2)
- Warning (Air and vacuum systems) (5)
- Brake performance not tested (1)
- Parking brake performance (Decelerometer (sp), Brake performance, Brakes) (1)
- Service brake performance (Decelerometer (sp), Brake performance, Brakes) (1)
- Brake operation (5)
- Parking brake operation (3)
- Parking brake performance (Tricycles, quadricycles and pre-68 vehicles, Decelerometer) (1)
- Service brake performance (Tricycles, quadricycles and pre-68 vehicles, Decelerometer) (1)
- Gradient hand brake (1)
- Brake imbalance (Plate brake tester) (1)
- Parking brake performance (Plate brake tester (sp), Brake performance, Brakes) (1)
- Service brake performance (Plate brake tester (sp), Brake performance, Brakes) (1)
- Operation (Brake performance) (3)
- Parking brake performance (Plate brake tester, Brake performance, Brakes) (3)
- Parking brake performance (Tricycles, quadricycles and pre-68 vehicles, Plate brake tester) (3)
- Service brake performance (Tricycles, quadricycles and pre-68 vehicles, Plate brake tester) (2)
- Brake Imbalance (1)
- Parking brake performance (Rbt (sp), Brake performance, Brakes) (1)
- Service brake performance (Rbt (sp), Brake performance, Brakes) (1)
- Transmission brake (1)
- Brake imbalance (Rbt) (1)
- Front wheels (10)
- Rear wheels (10)
- Parking brake performance (Tricycles, quadricycles and pre-68 vehicles, Rbt) (3)
- Service brake performance (Tricycles, quadricycles and pre-68 vehicles, Rbt) (2)
- Electronic stability system (10)
- Operation (Full power hydraulic systems) (1)
- Warning (Full power hydraulic systems) (4)
- Attachment (Brakes) (1)
- Condition (Hand operated control valves) (12)
- Operation (Hand operated control valves) (3)
- Brake back plates (5)
- Brake calipers (9)
- Brake discs (13)
- Brake drums (12)
- Brake linings (2)
- Brake pads (7)
- Wheel cylinder (7)
- Brake fluid warning lamp (2)
- Cylinders (10)
- Hoses (Hydraulic systems) (16)
- Master cylinder (5)
- Pipes (Hydraulic systems) (13)
- Pump (Brakes) (15)
- Reservoirs (Hydraulic systems) (13)
- Servos (Hydraulic systems) (18)
- Valves (Hydraulic systems) (20)
- Leaks (Hydraulic systems) (1)
- Operation (Hydraulic systems) (5)
- Locking devices (Brakes) (5)
- Brake slack adjuster (7)
- Cable (Mechanical components) (9)
- Clevis joint (9)
- Lever (Mechanical components) (11)
- Linkage (Mechanical components) (10)
- Pivot (8)
- Relay lever (8)
- Rod (Mechanical components) (10)
- Stationary pin (8)
- Condition (Parking brake) (20)
- Electronic parking brake (7)
- Fitment (Brakes) (2)
- Actuating linkage mounting (5)
- Master cylinder/servo mounting (5)
- Park brake mechanism/associated mountings (5)
- Restricted movement (1)
- Anti-slip (4)
- Condition (Pedal) (18)
- Cable (Pedal linkage) (2)
- Lever (Pedal linkage) (6)
- Linkage (Pedal linkage) (8)
- Rod (Pedal linkage) (3)
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