Caterpillar

3477963 is a belt tensioner designed for Caterpillar engine accessory drive systems. It ensures consistent belt tension across rotating components such as alternators, air compressors, and hydraulic pumps. This tensioner reduces belt slippage, vibration, and premature wear, supporting efficient power transmission and system reliability.

Specifications: &nbsp; 
&ndash; Part Number: 3477963 &nbsp; 
&ndash; Component Type: Belt Tensioner &nbsp; 
&ndash; Function: Maintains accessory belt tension &nbsp; 
&ndash; Pulley Surface: Smooth &nbsp; 
&ndash; Pulley Diameter: 2.875 in &nbsp; 
&ndash; Width: 3.25 in &nbsp; 
&ndash; Height: 8.75 in &nbsp; 
&ndash; Weight: 5.1 lb (2.32 kg) &nbsp; 
&ndash; Thread Size: 7/16&quot;-28 &nbsp; 
&ndash; Voltage: N/A (mechanical component) &nbsp; 
&ndash; Country of Origin: Typically USA or Mexico &nbsp; 
&ndash; Condition: New 
&ndash; Cross References: 347-7963, FLT689447, S28457, WA900-03-2050

Compatible Equipment: &nbsp; 
&ndash; Engines: Caterpillar C13, C15, C18, 3406E &nbsp; 
&ndash; Trucks: Peterbilt 367, 379, 387 (2000&ndash;2011) &nbsp; 
&ndash; Off-highway: 773F, 775F, 777F, 988H, 992K &nbsp; 
&ndash; Refer to engine diagrams for fitment confirmation

Applications: &nbsp; 
&ndash; Accessory drive belt systems &nbsp; 
&ndash; Alternator, compressor, and hydraulic pump support

Use Cases: &nbsp; 
&ndash; Replacement of worn or noisy tensioners &nbsp; 
&ndash; Restoration of belt alignment and tension &nbsp; 
&ndash; Preventive maintenance during engine servicing

Key Features: &nbsp; 
&ndash; OEM-grade tension control for accessory systems &nbsp; 
&ndash; Smooth pulley surface for reduced belt wear &nbsp; 
&ndash; Heavy-duty spring-loaded mechanism &nbsp; 
&ndash; Compatible with multiple CAT engine platforms

Order 3477963 belt tensioner for Caterpillar C13, C15, and C18 engines. Weight 5.1 lb. Fast global delivery from Peri-Parts.

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3477963 Belt Tensioner for Caterpillar C13 / C15 / C18 Engines | Peri-Parts

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