9Y2988 Breather As Fits Caterpillar (Fits CAT) Why does Bradley Cooper look SO different? Plastic surgeon gives his. One New Aftermarket Replacement Engine Crankcase Breather Assembly for Caterpillar (Cat) Heavy Equipment This aftermarket replacement crankcase breather assembly (9Y2988) mounts to the valve cover and vents crankcase pressure on Caterpillar 3400 series and 3300 series diesel engines. It is a direct replacement for the OEM part used across a wide range of Cat construction, mining, and earthmoving equipment powered by the 3306, 3406, 3408, and 3412 engine families. Specifications Weight: approximately 0. 4 lbs Dimensions: approximately 5. 51 x 5. 51 x 4. 13 in Material: Plastic housing Compatible Models Caterpillar Articulated Dump Truck: 725, 725C, 725C2, 735, 740, D40D, D400D Caterpillar Cold Planer Asphalt: PM 565, PM310, PM312, PM313, PR 450C, PR 1000C Caterpillar Compactor: 825C, 826C, 836 Caterpillar Crawler Tractor Dozer: D6, D6T LGP, D6T XL, D6T XW, D6 XE, D7, D7E, D7E LGP, D8L, D8N, D9L, D9N, D9R, D10N Caterpillar Dump Truck: 768C, 769C, 771C, 772B, 773B, 775B Caterpillar Engine: 3306, 3406, 3406A, 3406B, 3406C, 3406E, 3408, 3408B, 3408C, 3412, 3412B, 3412C, 3412E, G3406, G3408, G3412, G3412C, G3508 Caterpillar Excavator: 245B, 324D, 324D FM, 324D FM LL, 324D L, 324D LN, 325D, 325D FM, 325D FM LL, 325D L, 325D MH, 326D L, 328D LCR, 329D, 329D L, 329D LN, 336E, 336E H, 336E HVG, 336E L, 336E LH, 336E LN, 336F L, 336F L XE, 336F LN, 336F LN XE, 336F XE, 340F, 340F L LRE, 340F L UHD, 375, 375L, 568 FM, 568 FM LL, M325D, M325D L MH Caterpillar Motor Grader: 16G Caterpillar Pipelayer: 578, 589, PL72 Caterpillar Wheel Loader Tractor Loader Dozer: 814B, 824C, 834B, 834S, 834U, 973, 973K, 980F, 992D Caterpillar Wheel Scraper: 621F Caterpillar Other: 2864C Replaces Part Number(s): 9Y2988, 9Y 2988 Aftermarket Interchange Numbers 361 1716, 3611716, M 9Y2988 (Interstate McBee), PAI 350495 New aftermarket replacement part not remanufactured, not used.