Guidance summary
Treat lost air assistance as a braking fault
This reviewed summary is linked to the question. It does not change the saved answer or score.
Read the reviewed summary
The US Navy’s 1975 Construction Mechanic technical manual describes excessive pedal effort when an air-over-hydraulic power cylinder fails. Air-supply leaks or control faults can impair assistance; the symptom does not uniquely identify the compressor. This is a mechanical explanation, not UK law or a repair instruction. Keep the vehicle secured and obtain qualified assessment before driving.
Source: Treat lost air assistance as a braking fault
This reviewed summary is available here without another request. The full source opens in a new tab and needs a connection.