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Recall 1990151

Brakes · Walinga · published 1 Oct 1990

25Vehicles affected in Canada
1Models
1989–1990Model years
Heavy TrailerSafety Mfr

The issue

THE MIDLAND AIR BRAKE SYSTEM VALVES ON THESE VEHICLES MAY EXPERIENCE FAILURE AS A RESULT OF HYDROGEN INDUCED EMBRITTLEMENT OF THE VALVE FASTENERS. VALVE FAILURE WOULD RESULT IN LOSS OF AIR PRESSURE TO THE EXTENT THAT THE EMERGENCY SPRING BRAKES WOULD APPLY AND/OR LOSS OF SERVICE BRAKE CAPABILITY WOULD OCCUR ON ONE OR MORE AXLES SERVICED BY THE DEFECTIVE VALVE. FAILURE MODE IS DEPENDENT ON THE TYPE OF VALVE WHICH FAILS.(TRAILER RELAY EMERGENCY VALVE, TRAILER SPRING BRAKE CONTROL VALVE,SERVICE EMERGENCY RELAY VALVE). CORRECTION:DEFECTIVE VALVES WILL BE REPLACED.

Description (français)

Les valves du circuit de freinage pneumatique Midland de ces véhicules peuvent briser à cause d'un traitement thermique à l'hydrogène qui en fragilise les pièces de fixation. Le bris des valves peut entraîner une perte de pression d'air assez importante pour causer l'application des freins à ressorts d'urgence et/ou une perte de puissance du freinage de service sur un ou plusieurs des essieux dépendant de la valve défectueuse. La nature de la défectuosité varie selon le type de valve (valve-relais d'urgence de la remorque, valve-relais d'urgence des freins de service, valve de commande des freins à ressorts de la remorque).

Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada · official text, unchanged

Vehicles covered

Make and modelModel years
Walinga SEMI-TRAILER1989, 1990