The 1975 Ford W Series has 2 recalls, both involving the air brake system, where separate defects can compromise braking performance on these heavy trucks.
On certain models equipped with Eaton anti-lock air brake controllers, a nylon piston inside the pneumatic valve can swell when it contacts contaminants that build up in poorly maintained air brake systems, which can interfere with proper brake operation. On W9000 trucks built during a specific production window in early 1975, pipe plugs were incorrectly fitted in the exhaust port of the trailer air supply valve, which can disrupt air flow and reduce braking effectiveness when towing a trailer.
At a glance
What can fail
A nylon piston in the pneumatic valve system can swell when exposed to air brake contaminants from insufficient maintenance. The swollen piston may stick or jam, causing temporary or permanent loss of braking on that axle.
What the fix does
No remedy description available.
Summarized — see the official notice for exact wording, dates, and contacts.
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At a glance
What can fail
On certain W9000 vehicles built between October 2, 1975 and April 22, 1975, exhaust pipe plugs were incorrectly installed in the trailer air supply valve. This traps air in the valve, preventing a piston from opening and causing gradual air pressure loss in the trailer service brake system with no warning.
What the fix does
No remedy description available.
Summarized — see the official notice for exact wording, dates, and contacts.
