IoTA_Logo(2).png

Institute of Transport Administration

Educating Transport Management since 1944

News

Guidance for vocational drivers (lorry, bus and coach)

18th Sep 2025

Transporting container valves used in fixed firefighting systems

17th Sep 2025

Medical examination report for a lorry or bus driving licence (D4)

17th Sep 2025

DVSA Update on ‘opting out’ for Driver CPC training

16th Sep 2025

Transformation plan for UK and French Le Shuttle terminals

15th Sep 2025

View all news »

How to maintain automatic slack adjusters

23 Sep 2021

All HGVs, PSVs and trailers over 3.5 tonnes must be fitted with fully functioning automatic slack adjusters.

Any fitting, maintenance, or assessment should be carried out only by suitably trained and competent technicians. If in any doubt you should refer to the component manufacturer for more information. It’s particularly important to follow manufacturer’s instructions during the installation process.

This guide tells you how to maintain automatic slack adjusters and how to assess their condition.

Further information:

https://www.gov.uk/government/publications/automatic-slack-adjusters-maintenance-guide/how-to-maintain-automatic-slack-adjusters