GB18447.4-2008
Safety requirements for tractors - Part 4: Belt-drive wheeled tractors
拖拉机 安全要求 第4部分：皮带传动轮式拖拉机
GB 18447.4-2008 is a current mandatory Chinese national standard for Safety requirements for tractors - Part 4: Belt-drive wheeled tractors. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Oct 1, 2009.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies specifically to belt-drive wheeled tractors utilized in agricultural and forestry operations. It establishes safety requirements based on the physical performance and intended use of the machinery. It is crucial to note that this standard is mandatory for all manufacturers targeting the Chinese market. It does not apply to other tractor variants such as crawler or direct-drive wheeled tractors, which are covered under different parts of the GB 18447 series.
Technical requirements
The standard comprehensively addresses the safety and protective measures for belt-drive tractors. It mandates specific requirements for hydraulic system overload protection, specifying minimum burst pressure ratios for different hydraulic piping. Additionally, it outlines strict criteria for fuel tank integrity, requiring leak-proof performance under pressurized and inverted testing conditions. Manufacturers must ensure all exposed rotating components, such as fans and belt pulleys, are equipped with durable protective guards. Regarding operational safety, the standard sets definitive limits for environmental and operator-position noise, aligning with the referenced GB 6376. It also enforces a maximum limit for exhaust smoke opacity to mitigate environmental hazards. Furthermore, it dictates that tractors must be equipped with roll-over protective structures (ROPS) and safety belts that meet stringent strength requirements. The standard also specifies critical performance thresholds for braking systems. This includes reliable parking brake performance on steep inclines and minimum average deceleration values for cold-state braking. Compliance with these braking parameters is verified through specific testing protocols. Lighting and signaling devices, including headlights and rear reflex reflectors, are also rigorously regulated to ensure operational visibility and safety.
Testing methods
The standard outlines several critical testing procedures to verify compliance. Braking performance is evaluated on dry, hard slopes to test parking brakes and measure cold-state average deceleration, referencing GB/T 3871.6. Noise levels at the operator's position and surrounding environment are measured according to GB/T 3871.8. Additionally, exhaust smoke opacity is measured using procedures specified in GB/T 3871.13. Headlight beam positioning is also strictly tested using either a screen method or a dedicated headlight testing instrument.
FAQs
What products are regulated under GB 18447.4-2008?
It applies specifically to belt-drive wheeled tractors used in agricultural and forestry applications. It does not cover other tractor types such as crawler tractors or direct-drive wheeled tractors, which are covered by other parts of the GB 18447 series.
Is GB 18447.4-2008 a mandatory standard?
Yes, all technical content in this standard is mandatory. Manufacturers must comply with it, and products failing to meet these requirements were prohibited from the Chinese market starting January 1, 2010.
How does GB 18447.4-2008 relate to ISO standards?
The standard references several international standards, such as ISO 12100-1:2003 for basic machinery safety concepts and ISO 5697:1982 for braking performance determination. However, it establishes specific Chinese national limits for exhaust smoke, noise, and structural safety tailored to belt-drive tractors.
The summary above provides a high-level overview of GB 18447.4-2008. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 18447.4-2008 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- T61
- ICS
- 65.060.10
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- Ministry of Industry and Information Technology
Relationships
Replaced by:GB 18447-2025 (Upcoming)