Engine Main Bearings | Durable & Efficient Support

Caterpillar Main Bearings Protect Against Costly Engine Failures

Caterpillar main bearings support the crankshaft and allow it to rotate smoothly within the engine block, absorbing the forces generated by combustion and ensuring consistent, low-friction operation. Each bearing set is precision-engineered for specific CAT engine models, including 3116, 3128, 3406, C11, C13, C15, 3508, 3512, 3516, D353, D398, and many more. These bearings are available in standard sizes and a range of undersized options (such as 0.25mm, 0.50mm, 0.51mm, 0.7mm), allowing for proper fit even after machining or wear on the crankshaft journals.

Constructed from tri-metal, steel-backed aluminum, or similar robust materials, high quality replacement main bearings for Caterpillar equipment are designed for high load capacity, heat resistance, and long service life helping prevent premature crankshaft wear and engine failures. Correct installation, lubrication, and regular inspection are essential to maintain proper bearing clearance and oil pressure.

Propel Parts supplies a comprehensive range of high quality replacement main bearings for Caterpillar equipment, with clear compatibility listings and fast shipping. This ensures you can quickly find and install the correct bearing set for your engine, minimizing downtime and protecting your investment.

Frequently Asked Questions (FAQs)

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What do main bearings do in a Caterpillar engine?

Main bearings support the crankshaft, reduce friction, and help maintain alignment, allowing smooth, efficient engine operation under heavy loads.

How do I know if my main bearings need replacement?

Signs include excessive crankshaft movement, low oil pressure, unusual engine noises, or visible bearing or journal wear. Replace during major overhauls or at any sign of distress.

Are all main bearings for CAT equipment the same?

No, each set is designed for specific engine models and may require a standard or undersize bearing based on your crankshaft’s conditional ways to match your engine’s part number and size.

Why use genuine or high quality replacement main bearings for Caterpillar equipment?

Genuine or premium quality replacement bearings for CAT equipment are engineered for precise fit, durability, and optimal oil film maintenance, helping avoid crankshaft damage and costly engine repairs.

Can I replace the main bearings myself?

With advanced mechanical skills and proper tools, you can install main bearings by following Caterpillar’s strict installation and torque procedures.

Where can I buy premium quality replacement main bearings for Caterpillar equipment?

Propel Parts offers a wide selection of high quality replacement main bearings for CAT equipment, with expert support and fast delivery for accurate, timely replacements. Our Technical Team is ready to help you to choose the right main bearings for your equipment with confidence.

Caterpillar Main Bearings Protect Against Costly Engine Failures

8N8973 Bearing Std I.D. for CAT 613C, 910, D3 & more

New 1011530 Bearing-Std Replacement suitable for Caterpillar 613C, 613C II, 924F, 928G, 938F, 950F, 950F II, 960F, D5M, D6M, 953C, 963B, 3114, 3116, 561M, 120H, 120H ES, 120H NA, 135H, 135H NA, 3116, IT12B, IT24F, IT28F, IT28G, IT38F, 3116, 320B, 320B L,

New 1077708 Bearing-Main Std Replacement suitable for Caterpillar 613C, 613C II, 924F, 928G, 938F, 950F, 950F II, 960F, D5M, D6M, 953C, 963B, 3114, 3116, 561M, 120H, 120H ES, 120H NA, 135H, 135H NA, 3116, IT12B, IT24F, IT28F, IT28G, IT38F, 3116, 320B, 320

New 1280382 Bearing-Main .51M Replacement suitable for Caterpillar 814F, 966G II, 966H, 972G II, 972H, 7A, 7S, 7SU, 7U, D7R II, C-10, C-12, C11, C13, RM-300, 572R II, CX31-C13I, TH35-C13I, TH35-C13T, CX31-P600, TH35-E81, 345C, 345C L, 140H, 143H, 14H, 14M

New 1280383 Bearing-Main (0.7 Replacement suitable for Caterpillar 814F, 966G II, 966H, 972G II, 972H, 7A, 7S, 7SU, 7U, D7R II, C-10, C-12, C11, C13, RM-300, 572R II, CX31-C13I, TH35-C13I, TH35-C13T, CX31-P600, TH35-E81, 345C, 345C L, 140H, 143H, 14H, 14M

New 1280400 Brng-Main .51Mm U Replacement suitable for Caterpillar 814F, 966G II, 966H, 972G II, 972H, 7A, 7S, 7SU, 7U, D7R II, C-10, C-12, C11, C13, RM-300, 572R II, CX31-C13I, TH35-C13I, TH35-C13T, CX31-P600, TH35-E81, 345C, 345C L, 140H, 143H, 14H, 14M

New 1280401 Bearing-Main (0.7 Replacement suitable for Caterpillar 814F, 966G II, 966H, 972G II, 972H, 7A, 7S, 7SU, 7U, D7R II, C-10, C-12, C11, C13, RM-300, 572R II, CX31-C13I, TH35-C13I, TH35-C13T, CX31-P600, TH35-E81, 345C, 345C L, 140H, 143H, 14H, 14M

New 1450162 Bearing-Main 0.25 Replacement suitable for Caterpillar 613C, 613C II, 924F, 928G, 938F, 950F, 950F II, 960F, D5M, D6M, 953C, 963B, 3114, 3116, 561M, 120H, 120H ES, 120H NA, 135H, 135H NA, 3116, IT12B, IT24F, IT28F, IT28G, IT38F, 3116, 320B, 32

New 1450163 Bearing 0.25 Mm Replacement suitable for Caterpillar 3114, 3116, 3127 and more

New 1450164 Bearing-Main 0.50 Replacement suitable for Caterpillar 613C, 613C II, 924F, 928G, 938F, 950F, 950F II, 960F, D5M, D6M, 953C, 963B, 3114, 3116, 561M, 120H, 120H ES, 120H NA, 135H, 135H NA, 3116, IT12B, IT24F, IT28F, IT28G, IT38F, 3116, 320B, 32

New 1450165 Bearing Ma 0.020 Replacement suitable for Caterpillar 3114, 3116, 3128, and more

New 1496031 Bearing-Main Std Replacement suitable for Caterpillar 824S, 834S, 834U, 824C, 824G, 824G II, 824H, 834B, 834G, 834H, 844, 844H, 854K, 621E, 621F, 623E, 623F, 627E, 627F, 651E, 657, 657B, 657E, 657G, 621B, 621E, 621F, 621G, 621S, 623B, 623E, 62

New 1496032 Bearing Eng .025 Replacement suitable for Caterpillar 854G, 992G, 994D, 994F, D11N, D11R, 3508B, 3508C, 3512B, 3512C, 3516C, G3520B, 776D, 784B, 784C, 777, 777B, 777C, 777D, 785B, 785C, 785D, 789C, 793C, 793D, 797, 797B, G3508, G3508B, G3512,

New 1496033 Bearing-Ma .050 U Replacement suitable for Caterpillar 854G, 992G, 994D, 994F, D11N, D11R, 3508B, 3508C, 3512B, 3512C, 3516C, G3520B, 776D, 784B, 784C, 777, 777B, 777C, 777D, 785B, 785C, 785D, 789C, 793C, 793D, 797, 797B, G3508, G3508B, G3512,

New 1512939 Bearing-Main Std. Replacement suitable for Caterpillar MT735; MT745; MT755; MT765; MTC735; MTC745; MTC755; MTC765; 816F II; 815F II and more

New 1N4316 Brg-Std Replacement suitable for Caterpillar D353, G353D, and more

New 1N4319 Bearing-Main .025 Replacement suitable for Caterpillar D353, G353D, and more

New 1N4322 Bearing,Eng. 0. Replacement suitable for Caterpillar D353, G353D, and more

New 1W0312 Brg Main-Std Replacement suitable for Caterpillar 4P, D4HTSK II, 54H, 3204, and more

New 1W1661 Bearing-Main 0.01 Replacement suitable for Caterpillar 916, 926, 926A, 926E, G916, G926, D3, 3P, 3S, 4P, 3, D3B, D3C, D3C II, D4C, D4C II, 53, 931, 943, 953, 931B, 931C, 931C II, 943, 953, IT18, IT18B, IT28, IT28B, 215B, 3204, and more

New 1W1662 Bearing,Eng. 0.02 Replacement suitable for Caterpillar 916, 926, 926A, 926E, G916, G926, D3, 3P, 3S, 4P, 3, D3B, D3C, D3C II, D4C, D4C II, 53, 931, 943, 953, 931B, 931C, 931C II, 943, 953, IT18, IT18B, IT28, IT28B, 215B, 3204, and more

New 1W1663 Bearing,Eng. 0. Replacement suitable for Caterpillar 916, 926, 926A, 926E, G916, G926, D3, 3P, 3S, 4P, 3, D3B, D3C, D3C II, D4C, D4C II, 53, 931, 943, 953, 931B, 931C, 931C II, 943, 953, IT18, IT18B, IT28, IT28B, 215B, 3204, and more

New 2110587 Bearing-Main Std Replacement suitable for Caterpillar 814F, 966G II, 966H, 972G II, 972H, 7A, 7S, 7SU, 7U, D7R II, C-10, C-12, C11, C13, RM-300, 572R II, CX31-C13I, TH35-C13I, TH35-C13T, CX31-P600, TH35-E81, 345C, 345C L, 140H, 143H, 14H, 14M,

New 2110588 Bearing Main Std Replacement suitable for Caterpillar 814F, 966G II, 966H, 972G II, 972H, 7A, 7S, 7SU, 7U, D7R II, C-10, C-12, C11, C13, RM-300, 572R II, CX31-C13I, TH35-C13I, TH35-C13T, CX31-P600, TH35-E81, 345C, 345C L, 140H, 143H, 14H, 14M,