{"id":2205,"date":"2025-08-16T16:03:23","date_gmt":"2025-08-16T16:03:23","guid":{"rendered":"https:\/\/www.dovinta.ca\/?post_type=truck_mechanic_cases&p=2205"},"modified":"2025-08-30T20:42:41","modified_gmt":"2025-08-30T20:42:41","slug":"truck-mechanics-case-2","status":"publish","type":"truck_mechanic_cases","link":"https:\/\/www.dovinta.ca\/fr\/truck_mechanic_cases\/truck-mechanics-case-2\/","title":{"rendered":"R\u00e9paration du flux d\u2019air CVC \u2013 Western Star 4900"},"content":{"rendered":"

Chez Dovinta Heavy Truck & Equipment Service, nous ne nous occupons pas seulement des moteurs et des transmissions, mais aussi des syst\u00e8mes de confort et de s\u00e9curit\u00e9 \u00e0 l\u2019int\u00e9rieur de votre cabine. R\u00e9cemment, nous avons travaill\u00e9 sur un Western Star 4900 pr\u00e9sentant un probl\u00e8me de circulation d\u2019air CVC affectant le d\u00e9givrage et la ventilation de la cabine.<\/p>\n\n\n\n\n\n\n

\n\n\n\n

Sympt\u00f4mes signal\u00e9s<\/strong><\/p>\n\n\n\n

Le conducteur a remarqu\u00e9 qu\u2019en passant le s\u00e9lecteur CVC en mode pare-brise\/d\u00e9givrage, rien ne se produisait : l\u2019air restait bloqu\u00e9 dans les bouches pour le visage et les pieds. Cela entra\u00eenait de s\u00e9rieux probl\u00e8mes de visibilit\u00e9 par temps froid et humide.<\/p>\n\n\n\n

\n\n\n\n

Diagnostic<\/strong><\/p>\n\n\n\n

Apr\u00e8s avoir retir\u00e9 le bo\u00eetier de distribution CVC, nous avons trouv\u00e9 la cause :<\/p>\n\n\n\n

La plaque du moteur de volet s\u2019\u00e9tait d\u00e9tach\u00e9e du bo\u00eetier en plastique, rendant les volets impossibles \u00e0 contr\u00f4ler.<\/p>\n\n\n\n

Les rivets retenant le m\u00e9canisme de volet avaient rouill\u00e9 et s\u2019\u00e9taient d\u00e9sint\u00e9gr\u00e9s.<\/p>\n\n\n\n

This failure was caused by moisture entering the dashboard through a damaged windshield weatherstrip (fixed in a separate job).<\/p>\n\n\n\n

En cons\u00e9quence, les volets ne pouvaient plus rediriger correctement l\u2019air entre les positions visage, pieds et pare-brise.<\/p>\n\n\n\n

\n\n\n\n

Le processus de r\u00e9paration<\/strong><\/p>\n\n\n\n

Comme le camion devait reprendre la route rapidement, attendre de nouvelles pi\u00e8ces d\u2019origine (OEM) n\u2019\u00e9tait pas une option. \u00c0 la place, nous avons :<\/p>\n\n\n\n

Remplac\u00e9 l\u2019ensemble du bo\u00eetier CVC par une unit\u00e9 d\u2019occasion en bon \u00e9tat provenant d\u2019un camion plus r\u00e9cent destin\u00e9 aux pi\u00e8ces.<\/p>\n\n\n\n

Nettoy\u00e9 et lav\u00e9 tous les conduits CVC avant l\u2019installation.<\/p>\n\n\n\n

V\u00e9rifi\u00e9 le fonctionnement des volets et install\u00e9 des moteurs r\u00e9vis\u00e9s sur tous les m\u00e9canismes de commande des volets.<\/p>\n\n\n\n

Entretenu le volet de recirculation, y compris l\u2019installation d\u2019un moteur mis \u00e0 jour (l\u2019ancien avait une broche de contact rouill\u00e9e \u00e0 cause de l\u2019humidit\u00e9).<\/p>\n\n\n\n

Tout r\u00e9assembl\u00e9 dans le tableau de bord sans retirer l\u2019ensemble de la planche de bord, ce qui a permis d\u2019\u00e9conomiser beaucoup de temps et de co\u00fbts de main-d\u2019\u0153uvre.<\/p>\n\n\n\n

\n\n\n\n

Dur\u00e9e de l\u2019intervention<\/strong><\/p>\n\n\n\n

La r\u00e9vision compl\u00e8te du syst\u00e8me CVC et son installation ont pris 7,5 heures.<\/p>\n\n\n\n

\n\n\n\n

R\u00e9sultats<\/strong><\/p>\n\n\n\n

Avec l\u2019unit\u00e9 de remplacement install\u00e9e et les volets enti\u00e8rement fonctionnels, le conducteur a retrouv\u00e9 :<\/p>\n\n\n\n

Un d\u00e9givrage fiable du pare-brise pour une visibilit\u00e9 s\u00e9curis\u00e9e.<\/p>\n\n\n\n

Un contr\u00f4le ad\u00e9quat du flux d\u2019air entre les bouches pour le visage, les pieds et le pare-brise.<\/p>\n\n\n\n

La tranquillit\u00e9 d\u2019esprit en sachant que le syst\u00e8me a \u00e9t\u00e9 nettoy\u00e9, remis \u00e0 neuf et prot\u00e9g\u00e9 contre de futurs probl\u00e8mes d\u2019humidit\u00e9.<\/p>\n\n\n\n

\n\n\n\n

Un autre exemple de la mani\u00e8re dont le service poids lourd de Dovinta propose des solutions pratiques qui permettent d\u2019\u00e9conomiser du temps et de l\u2019argent, tout en gardant les camions pr\u00eats \u00e0 prendre la route.<\/p>\n\n\n\n

<\/p>","protected":false},"featured_media":2535,"template":"","class_list":["post-2205","truck_mechanic_cases","type-truck_mechanic_cases","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nHVAC Airflow Repair \u2013 Western Star 4900 - Dovinta<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dovinta.ca\/fr\/truck_mechanic_cases\/truck-mechanics-case-2\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HVAC Airflow Repair \u2013 Western Star 4900 - Dovinta\" \/>\n<meta property=\"og:description\" content=\"At Dovinta Heavy Truck & Equipment Service, we don\u2019t just handle engines and drivetrains \u2013 we also take care of the comfort and safety systems inside your cab. 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