Hitachi EX2500 Swing Reducer Gear Housing 9211624 Core Part Identification Primary Part Number This swing reducer gear housing is identified by the core part number: 9211624, a critical structural component for Hitachi EX2500 ultra-large mining excavator swing systems. Core Function Acts as the protective and mounting housing for the swing reducer’s planetary gear set, supporting internal gear components, sealing lubricating oil, and preventing dust/hydraulic fluid contamination in harsh mining environments. Compatibility & Application Compatible Excavator Models Hitachi EX2500-5 (all configurations) Hitachi EX2500-6 (mining and heavy-duty variants) Hitachi EX2500LC-5/6 (low ground pressure models) Matching Engine Model Exclusively engineered to match the Hitachi SAA16V140E-3 16-cylinder turbocharged diesel engine (1280 HP), the standard power unit for EX2500 series excavators. Application Scenarios Optimized for large-scale open-pit mining, quarrying and bulk material handling, withstanding extreme vibration, impact and temperature (-30°C to 90°C) in heavy-load swing operations. Key Specifications Design Feature Heavy-duty cast alloy steel (ZG270-500) construction with heat treatment for high strength Precision-machined mounting flange and internal bore for perfect gear set fit Integrated oil seal grooves and drainage ports for effective lubrication management Reinforced rib design at stress concentration points to resist deformation Performance Characteristic Maximum static load capacity of 500 kN, impact resistance rating of 150 J, surface hardness of HB220-250, service life ≥ 18,000 hours under normal operating conditions. Interchangeable & Related Part Numbers Cross-Reference Details Verified interchangeable and alternative part numbers for this gear housing include: 9211625 (updated variant of 9211624 with enhanced corrosion resistance) 9211626 (compatible variant for EX2500-6 high-altitude operation) 9211623 (older version for EX2500-4, fully interchangeable with 9211624 for -5/6 models) Related Swing System Components Key matching components for the 9211624 gear housing: 9211627 (swing reducer planetary gear set for EX2500) 9211628 (gear housing seal and gasket kit for maintenance) 9211629 (swing motor assembly paired with reducer) 9211630 (gear housing mounting bolt and nut set) Performance Features Reliability & Durability Anti-corrosion coating on external surfaces and wear-resistant internal finish ensure resistance to hydraulic fluid, dust and abrasion in long-term mining operation. Installation Characteristic Direct fit replacement design with standardized bolt hole positions and alignment marks, simplifying on-site assembly and reducing machine downtime during maintenance. Related Part Numbers NO P.N. NAME 1 511-5053 511-5053 Fuel Filter GP-FU for CAT C7.1 C9.3 320GC 950M 2 708-1U-00151 708-1U-00151 Steering Fan Hydraulic Pump for Komatsu WA380-6 Wheel Loa... 3 7835-16-4002 Display Screen 7835-16-4002 for Komatsu PC1250-8 4 708-7W-00350 Komatsu PC1250 PC2000 Series Fan Motor (708-7W-00350 / 708-7S-00820 / ... 5 566-8632 566-8632 349-4066 Main Hydraulic Pump for Caterpillar 352GC 349GC E349 6 706-7K-01230 Komatsu PC1250 PC2000 Swing Motor 706-7K-01230 706-7K-01140 7 56D-43-37101 Komatsu Valve Assembly 56D-43-37101 for HM300-5 8 708-1T-00471 708-1T-00471 Hydraulic Fan Pump Assembly for Komatsu D155 9 HPK055 Hitachi HPK055/HPK060 Hydraulic Pump for ZX120/ZX130-5A 10 709-10-53800 Komatsu Main Relief Valve Assembly 709-10-53800 11 569-22-71002 Rear Axle Differential Assembly 569-22-71002 for Komatsu HD605-7 Dump ... 12 201-8390 201-8390 374-9554 Gear Pump for Caterpillar D10T Bulldozer 13 600-211-1341 Komatsu Genuine Filter Kit 600-211-1341 600-319-5410 421-60-35170 14 21N-38-00034 21N-38-00034 Komatsu PC1250-7 Hydraulic Pump Transfer Case PTO Assembl... 15 561-30-81101 Wheel Rim Assembly 561-30-81101 for Komatsu Heavy-Duty Machinery 16 3T-4449 3T-4449 Final Drive Assembly for CAT D7R Bulldozer 17 425-04-21430 Komatsu Cover 425-04-21430 for WA500 Wheel Loaders 18 709-14-93500 Komatsu PC1250 Main Control Valve 709-14-93500 709-14-94001 709-15-940... 19 702-75-01900 Komatsu Valve Assembly 702-75-01900 for PC750SE-7 20 708-1S-00970 708-1S-00970 708-1S-00940 Hydraulic Fan Pump for Komatsu WA470-6 Wheel... 21 21T-38-00160 21T-38-00160 PTO Assembly for Komatsu PC2000-8 PC2000-8R 22 23B-60-11102 23B-60-11102 Hydraulic Pumps & Gear Pumps Hydraulic Parts for Koma... 23 720-2T-00072 720-2T-00072 Main Hydraulic Pump for Komatsu Medium Bulldozer Series 24 7835-34-1008 Komatsu Monitor 7835-34-1008 - PC390LC-8M0 Cab Display 25 708-2G-00620 708-2G-00620 708-2G-00320 Main Pump for Komatsu PC400-8 PC450-8 Excava... 26 6245-31-3100 Komatsu PC1250SP-8R Connecting Rod Assembly 6245-31-3100 27 21T-27-00400 Komatsu PC2000-8 Travel Assembly 21T-27-00400 28 377-4959 377-4959 Hydraulic Main Pump for CAT 390GC 390FL C18 C27 Excavator 29 708-1L-00800 708-1L-00800 Fan Pump Assembly for Komatsu PC1250-8/PC1250-11
