Key numbers 79.03 and 79.04 are frequently encountered by auto mechanics. But what do these numbers signify and why are they crucial for vehicle repair and maintenance? This article clarifies all the important questions surrounding key numbers 79.03 and 79.04, providing valuable tips for your workshop.
What Do Key Numbers 79.03 and 79.04 Mean?
Key numbers 79.03 and 79.04 are part of the vehicle registration document (Zulassungsbescheinigung Teil I) and provide information about your vehicle’s braking system. 79.03 signifies a hydraulic dual-circuit braking system with a pressure limiter on the rear axle. 79.04, on the other hand, designates a hydraulic dual-circuit braking system with load-sensing proportional valve (LSV) or Automatic Load-dependent Brake control (ALB). This information is crucial for the correct diagnosis and repair of brake systems. Imagine repairing a vehicle with key number 79.04 and mistakenly using parts designed for a 79.03 system. The consequences could be fatal!
Vehicle registration document highlighting key numbers 79.03 and 79.04 related to the braking system.
Why Are Key Numbers 79.03 and 79.04 Important for Repairs?
Knowing these key numbers is essential for selecting the correct replacement parts. An incorrect part can not only impair brake function but also lead to dangerous situations. “Correctly identifying the braking system using the key number is the first step towards a safe and successful repair,” says renowned automotive expert Dr. Klaus Müller in his book “Modern Brake Technology.” These key numbers ensure you’re working with the right components, guaranteeing vehicle safety.
Differences Between 79.03 and 79.04
The main difference between 79.03 and 79.04 lies in the type of brake force regulation. While 79.03 uses a simple pressure limiter, 79.04 features load-dependent control. This means the braking force on the rear axle adjusts according to the vehicle’s load. An LSV/ALB system (79.04) offers improved braking performance and stability, especially for vehicles with varying loads. A car mechanic must understand these differences to properly maintain and repair the braking system.
Comparison of braking systems with pressure limiter (79.03) and LSV/ALB (79.04).
Frequently Asked Questions About Key Numbers 79.03 and 79.04
- Where can I find the key numbers in the vehicle registration document?
- What do I do if the key number is missing?
- Which spare parts do I need for a braking system with 79.04?
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Key Numbers 79.03 and 79.04: Safety First!
Key numbers 79.03 and 79.04 are vital information for every car mechanic. They enable correct identification of the braking system and selection of suitable spare parts. Your customers’ safety is paramount, making a thorough understanding of these key numbers essential. Invest in your knowledge and ensure safe vehicles on the road.
Car mechanic repairing brakes in a workshop.
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