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Caterpillar D7G bulldozer exhaust

The exhaust system of the Caterpillar D7G bulldozer is constructed from grade 304 stainless steel alloyed with chromium and nickel to provide high resistance to heat, vibration, and corrosion. The system includes an exhaust manifold, reinforced mid-pipe, multi-stage silencer, and a 45-degree vertical outlet. The internal pipe diameter ranges from 95 to 115 millimeters, with a wall thickness of approximately 2.3 millimeters. The silencer’s multilayer ceramic fiber structure reduces engine noise by up to 45 decibels. All joints are TIG and MIG welded to prevent gas leakage and enhance system durability.

In the design of the Caterpillar D7G bulldozer exhaust, gas flow is optimized to maintain a pressure drop below 9 percent of engine power. The high-temperature surface coating withstands up to 950 degrees Celsius, preventing oxidation and discoloration. The total system weight ranges from 30 to 36 kilograms, allowing direct installation on the main bulldozer chassis. A dual-layer thermal insulator in the central section prevents heat transfer to the operator cabin and hydraulic system, improving operational safety and reliability.
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