Rocker Arm Assembly Rocker arms are operated by pushrods from the camshaft and move valves, opening and closing them to allow fuel and air in and exhaust out of the combustion chamber. Attributes: Cat parts are manufactured to precise specifications and are built for durability, reliability, productivity, less environmental impact, and reuse SPECIFICATIONS Height (in): 2.2 Length (in): 6.8 COMPATIBLE MODELS Wheel-Type Loader 992G 994K 994F 994H 994D Engine - Generator Set 3516C 3516B 3516E 3512C 3508B 3512B 3508 PM3516 XQC1600 PM3508 XQC1200 PP3516 PM3512 Petroleum Products 3512E 3512B 3516C 3508B 3508C TH48-E80 3512C 3516B TH48-E70 CX48-P2300 2016 Off-Highway Truck 793C 777D 793D MT4400D AC 785C 785D 785 789D 776D 785G 797B 789 789C 785B 777B 797 777 789B 784C 777C Wheel Dozer 854G Excavator 5230B 5130B Engine - Industrial 3516B 3516E 3512C 3508C 3516C 3512E SPT343 3512B SPS343 SPF343 3508B SPF343C SPF743 Marine Products 3508C 3516B 3512C 3512E 3508 3516C 3508B 3512B 3512 3516E 3516 Expanded Mining Products MD6540C Track-Type Tractor D11R D11N Oem Solutions CAT WDS Cat Reman Part Number: 0R-1621 Length (in): 6.8 Width (in): 3.2 Height (in): 2.2 Weight (lbs): 1.87 Length (mm): 172.72 Width (mm): 81.28 Height (mm): 55.88 Weight (kg): 0.85