Dongfeng LoongGine Gearbox Top cover plate assembly 1701305-TV111

The 1701305-TV111 assembly incorporates a multi-layered sealing system to safeguard the gearbox’s internal components. It features a pre-installed high-temperature resistant rubber gasket (made of nitrile rubber, operating range: -30°C to 150°C) that conforms to the cover plate and gearbox housing mating surfaces, creating a tight seal against gear oil leakage. Additionally, the cover plate’s flange edge is machined to an ultra-smooth finish (Ra 0.8 μm or lower) to enhance gasket contact and prevent oil seepage—even under high internal gearbox pressure (up to 50 kPa) and thermal expansion cycles. The design also blocks external contaminants (e.g., dust, water, road debris) from entering the gearbox, which could cause premature wear of gears, bearings, and shift mechanisms, thus extending the gearbox’s service life

Crafted from high-grade cold-rolled carbon steel (Q235 or equivalent) with a powder-coated finish, the top cover plate delivers exceptional structural rigidity and corrosion resistance. The steel material undergoes a stamping process to form a robust, load-bearing structure that withstands mechanical impacts (e.g., accidental tool contact during maintenance) and vibration from the gearbox and vehicle chassis. The powder-coat finish (thickness: 60-80 μm) provides a protective barrier against rust, chemical corrosion (from oil or road salts), and scratches, ensuring the cover plate remains intact and functional even in harsh operating environments (e.g., dusty construction sites, wet highways). Unlike thin or low-grade steel alternatives, it resists bending, deformation, or cracking—maintaining a reliable seal and structural support for the gearbox

The 1701305-TV111 assembly is designed with integrated features to support the gearbox’s internal and external systems. It includes pre-drilled mounting holes for auxiliary components (e.g., shift lever brackets, oil level sensors) that align perfectly with Dongfeng LoongGine’s original component layout—eliminating the need for additional drilling or modification during installation. For gearboxes with oil filling or inspection requirements, the cover plate may also feature a factory-installed oil filler cap or inspection port (with a threaded seal) that complies with the gearbox’s oil maintenance specifications. This integrated design ensures the cover plate works seamlessly with the gearbox’s overall system, maintaining operational efficiency and simplifying maintenance tasks (e.g., oil checks, component upgrades)

As an OEM component for Dongfeng LoongGine, the 1701305-TV111 assembly undergoes strict quality testing to meet heavy-duty gearbox standards. Key inspections include: dimensional accuracy verification (via coordinate measuring machines to confirm hole position, flange flatness, and plate thickness), pressure testing (to simulate gearbox internal pressure and detect seal integrity), and material strength testing (to verify tensile strength and impact resistance). The assembly also comes with all factory-matched mounting hardware (e.g., bolts, lock washers) that align with the gearbox’s original fastener specifications, allowing for hassle-free installation—technicians can secure the cover plate in place using standard tools, typically completing the process in 30-60 minutes. This reduces vehicle downtime and ensures consistent performance, making it a reliable choice for gearbox maintenance and repair