Including anti-loosening coating-195-15-11282

Core Features

Precise Tightening: Pre-tightened to the original torque to ensure component fit and coaxiality, preventing gaps and leaks.

Anti-Loosening Locking: Dacromet coating + anti-loosening washers suppress vibration-induced loosening, suitable for high-frequency vibration conditions in bulldozers.

Sealing Assistance: Works with sealing gaskets/adhesives to ensure air/oil seals at the turbine end, exhaust manifold, etc.

Stress Dispersion: Bolt heads and washers distribute loads, preventing localized crushing of component contact surfaces.

Operating Condition Adaptability: High temperature/corrosion resistant, suitable for harsh environments on the engine exhaust side and transmission system.

Product Superiority

Original factory precision matching: Thread specifications, length, and head size are fully compatible with the corresponding mounting holes of D355, allowing for direct replacement without modification.

High strength and fatigue resistance: 10.9 grade 35CrMo steel, tensile strength ≥1040 MPa, shear strength ≥830 MPa, fatigue life ≥8000 hours.

Long-term corrosion resistance: Dacromet/zinc-nickel coating withstands neutral salt spray for ≥1000 hours, suitable for humid/dusty conditions, preventing bolt corrosion and seizing.

Stable and anti-loosening: The coating increases thread friction; combined with anti-loosening washers, anti-loosening performance is improved by approximately 40% under vibration conditions.

High temperature compatibility: The coating and material withstand temperatures up to 500℃ without becoming brittle or failing, suitable for long-term high-temperature conditions on the exhaust side.

Installation and Maintenance Points

Before installation, clean the threads and mounting surfaces, and check that the bolts are free of cracks, thread damage, and coating peeling.

Locate the bolts according to the original factory markings, and use anti-loosening washers/sealant. Tighten diagonally in stages according to the specified torque (e.g., 90–100 N·m for turbocharger flanges).

After installation, check for looseness and leakage. After starting the engine, recheck the torque; there should be no abnormal vibration or noise.

Check the bolt torque and coating condition every 1500 hours. Replace the bolts immediately if the torque decreases by more than 10% or the coating is damaged.

Use a special socket wrench during disassembly to avoid slipping the bolt heads; if the bolts are stuck due to rust, use a loosening agent to assist. Do not use force to disassemble.

Fit scenarios and value

Suitable for: High-load conditions such as mine stripping, large-scale earthmoving and transportation, and long-term continuous operation.

Core value: Ensures reliable fastening of key components, prevents loosening and leakage, reduces the risk of failure, extends component life, and improves the overall operational safety of the machine.