13305931 Sany SY485C1 hydraulic excavator bottom cover assembly

13305931 Sany SY485C1 hydraulic excavator bottom cover assembly

The SANY SY485C1 hydraulic excavator underbody protection assembly (13305931) is a core integrated protective component of the equipment chassis. It covers critical areas such as the engine oil pan, bottom of the hydraulic oil tank, gearbox, and drive axle. Manufactured strictly according to SANY’s original design drawings, dimensional tolerances, and process specifications, it is specifically designed for harsh working conditions such as mining, infrastructure construction, and earthmoving, characterized by abundant gravel, high vibrations, scratches, and mud. As the “bottom protective armor” of the chassis components, it plays a crucial role in resisting impacts from ground debris, preventing mud and sand intrusion, preventing lubricant leakage, and protecting chassis pipelines. It directly ensures the operational safety of the core chassis components and is a high-quality original factory replacement assembly for aging or damaged underbody protective components on the SY485C1 excavator.

The lower protective cover assembly is integrally stamped from high-strength manganese steel sheet (thickness ≥ 5mm), and undergoes tempering heat treatment and shot blasting rust removal, achieving a hardness of HRC28-32. It exhibits excellent impact and deformation resistance, effectively resisting direct impacts from ground debris and protruding obstacles during construction, preventing damage and oil leakage from vulnerable components such as the oil pan and bottom of the oil tank. The cover surface employs a double-layer anti-corrosion process of electrophoresis + wear-resistant topcoat, with a coating thickness of 70-90μm. It showed no rust after 1500 hours of salt spray testing and can withstand immersion in mud and water, as well as acid and alkaline soil corrosion. It is resistant to rust and paint peeling during long-term outdoor operation. The cover features a contoured design that precisely fits the chassis profile. It includes pre-drained holes for the engine drain plug, transmission access hole, and cable clearance grooves. All openings align perfectly with original vehicle components, allowing for routine maintenance without disassembling the cover. The reinforced edges enhance overall rigidity and prevent sharp edges from scratching operators or cables. The cover’s connection to the chassis is equipped with original nitrile rubber gaskets, providing excellent sealing performance and preventing mud and water from seeping in, protecting internal chassis components and reducing wear.

The cover utilizes a multi-point bolt fixing structure, equipped with high-strength anti-loosening bolts and shock-absorbing pads. The mounting holes precisely match the chassis’s pre-embedded supports, with tolerances controlled within ±0.03mm. Once tightened, it can withstand severe bumps and vibrations during equipment operation, remaining secure and noise-free. Disassembly is convenient; simply remove the corresponding bolts to remove sections or the entire cover, facilitating chassis component inspection and troubleshooting. The bottom of the cover is designed with an anti-slip hook structure to further improve installation stability and prevent accidental detachment under extreme working conditions.

Core Technical Parameters

Part Model: 13305931
Part Name: Bottom Cover Assembly (Chassis-Specific Protective Component)
Applicable Model: SANY SY485C1 Hydraulic Excavator
Material: High-strength manganese steel plate, nitrile rubber gasket, high-strength anti-loosening bolts, shock-absorbing pads
Process: Integral stamping, tempering heat treatment, shot blasting, electrophoresis + wear-resistant topcoat for corrosion protection, sealed assembly
Features: Impact-resistant and wear-resistant, leak-proof, corrosion-resistant and durable, stable installation, convenient maintenance, contour-following design
Functions: Protection of core chassis components, protection against gravel impact, prevention of mud and sand intrusion, protection of chassis pipelines, and provision of maintenance access

Core Advantages

Original factory standard seamless fit, no modification required for installation; high-strength manganese steel material, strong impact and deformation resistance; double-layer anti-corrosion process, adaptable to harsh working conditions with mud and water; contour-following design + The sealed structure provides comprehensive protection without any blind spots; the reserved maintenance holes improve operation and maintenance efficiency and extend the service life of chassis components.

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