CAT 361-1691 BEARING-SLV-GD

The CAT 361-1691 is a genuine Caterpillar exhaust muffler assembly (YM markings are commonly found on regionally compatible versions). It is designed for medium to large diesel engine exhaust systems, its core functions being noise reduction (approximately 15-20 dB(A)) and reducing exhaust back pressure to ensure stable engine power. It is suitable for heavy-duty applications such as mining and infrastructure construction… The following are key details.

Core Technical Parameters

Item Details
Part Model: CAT 361-1691 (Exhaust Muffler Assembly, YM Region Adaptation Version)

Material: Housing is carbon steel (high-temperature anti-corrosion coating), internal structure is multi-layer perforated tube + fiberglass sound-absorbing cotton + baffle plate, end cap is alloy steel, high temperature resistance ≥600℃

Key Dimensions: Overall length approx. 1200mm, diameter approx. 300mm, inlet/outlet flange inner diameter 127mm (5in), flange bolt holes 4×φ18mm, mounting center distance 200mm

Unit Weight: Approx. 48kg (106 lbs)

Compatible Models: CAT 3616 industrial engines, 3616 generator sets, C280 series marine engines, and exhaust systems of some large loaders/mining trucks

Performance Characteristics: Rated exhaust flow ≥1800 m³/h, muffler 15-20dB (A), operating temperature -40℃ to + 550℃, resistant to vibration and alternating heat loads, back pressure loss ≤3kPa
Structure and Core Functions

Multi-stage silencing: Employs a resistive + damping composite silencing structure. Perforated pipes and sound-absorbing cotton attenuate mid-to-high frequency noise, while guide vanes reduce airflow impact and low-frequency resonance, resulting in significant overall noise reduction that meets industrial noise standards.

Low back pressure design: Optimizes internal airflow channels, reducing exhaust resistance and preventing engine power loss. It also lowers exhaust temperature, protecting aftertreatment systems (such as three-way catalytic converters).

Durable protection: The high-temperature anti-corrosion coating on the shell resists exhaust gas corrosion and outdoor environmental erosion. The sound-absorbing cotton is high-temperature resistant and does not easily age, with a service life ≥8000 working hours.

Installation and compatibility: Standard flange connection, compatible with original factory exhaust pipes and brackets. The YM-branded version is optimized for emission/noise regulations in specific regions, ensuring compliance.

Suitable Scenarios and Installation/Maintenance Points

Suitable Scenarios: For the exhaust terminals of large engines such as the 3616, suitable for heavy-duty, high exhaust flow conditions, such as mining generator sets, large construction machinery power systems, and marine main engine exhaust systems.

Installation Specifications: Clean the flange surface, install the dedicated sealing gasket (original 361-1692 gasket recommended), tighten bolts diagonally to a torque of 80-100 N·m to prevent air leakage.

Use flexible hangers for fixing to avoid vibration transmission and housing cracking caused by rigid connections. Ensure a distance of ≥150mm from surrounding components to prevent high-temperature burns.

Maintenance Recommendations: Every 1000 working hours, check the muffler housing for cracks and perforations, and check the flange seal for integrity. If air leakage is found, replace the gasket or tighten the bolts immediately.

Every 3000 working hours, check the internal sound-absorbing cotton. If aging or detachment is observed, disassemble and replace it to prevent decreased silencing effect and increased exhaust resistance.

When storing for an extended period, seal the entrances and exits to prevent moisture and dust from entering and causing corrosion.