Hitachi ZX17 and ZX17U Series Swing Motor Slewing Drive Components Optimize the superstructure rotational precision, responsiveness, and cycle-time efficiency of your compact crawler equipment with premium-grade replacement swing motor assemblies engineered specifically for Hitachi ZX17 mini excavators. Designed to manage repetitive 360-degree rotational loads during urban utility construction, residential trenching, and light landscaping, these integrated hydrostatic units guarantee continuous torque transmission and minimized turntable drift. Applicable Excavator Models and Specifications Compatible Excavators: Hitachi Zaxis ZX16-3, ZX17, ZX17U, ZX17U-2, ZX17UNA-2, ZX18-3 Compact Excavators Associated Engine Models: Yanmar 3TNV70, Yanmar 3TNV74 Diesel Engines Hitachi 1.7-Ton Class Hydraulic Swing Motor Group The high-pressure compact axial piston swing motor governs upper frame alignment and decelerating brake controls. High-tolerance machining of the cylinder barrel groups, valve plates, and piston configurations ensures consistent volumetric efficiency and eliminates hydraulic cavitation under quick forward-reverse operation cycles. Part Numbers & Interchangeable Assembly Codes Primary Motor Assembly Part Number: 104-6419-005 Interchangeable Production Codes: 1046419005, 104-6422-005, 1046422005, 4654366, YN4654366 Alternative Layout Reference: 104-6456-005, 104-6457-005 (Application-dependent housing styles) Planetary Reduction Gearbox & Internal Maintenance Spares To support standard mini excavator fleet maintenance and minimize workshop overhaul times, a comprehensive line of exact-fit internal components and sealing groups is supported. Related Service and Repair Elements Output Drive Pinion Shaft: Vertical drive shaft (11-tooth or 20-tooth configuration metrics) Internal Gearing Groups: Center sun shafts, multi-stage mini planetary carrier blocks, and outer ring gear teeth Dynamic Sealing Systems: High-pressure shaft oil seals, heavy-duty casing roller bearings, and full ZX17 swing motor seal repair kits Key Technical Advantages Integrated Shock Relief Control: Features built-in dynamic cushion and relief valve networks that absorb sudden hydraulic pressure spikes during immediate stopping actions, protecting the primary slewing ring teeth from stress fractures. Induction-Hardened Metallurgy: High-strength carbon alloy planetary gear profiles and internal sliding surfaces undergo deep thermal treatment to resist premature pitting caused by particle-heavy lubricants. Direct Drop-In Field Fitting: Machined precisely to original factory bolt-hole configurations and output spline metrics, enabling rapid field assembly with zero installation modifications required. Related Part Numbers NO P.N. NAME 1 095600-5570 Denso Common Rail Fuel Rail 095600-5570 for Isuzu 4JK1 4JJ1 Diesel Eng... 2 723-65-21700 723-65-21700 Main Control Valve for Komatsu D155AX-6 3 7835-34-1008 Komatsu Monitor 7835-34-1008 - PC390LC-8M0 Cab Display 4 702-16-01682 Komatsu Pre-valve 702-16-01682 for PC1250-7 PC750-7 5 600-211-1341 Komatsu Genuine Filter Kit 600-211-1341 600-319-5410 421-60-35170 6 LVP370 LVP370 Main Hydraulic Piston Pump for Hitachi EX1800 EX3500 Excavator 7 EM8838 Rear Suspension Cylinder EM8838 for Komatsu 830E Series Mining Trucks 8 561-87-66102 Komatsu HD785-5 Control Valve assembly 561-87-66102 9 6252-41-9100 Komatsu EGR Valve 6252-41-9100 for 6D125E-6 PC490-10 10 723-40-50301 723-40-50301 723-47-17103 Main Control Valve for Komatsu PC300-6 PC400... 11 7831-68-9000 Komatsu Panel 7831-68-9000 for D155 D375 bulldozers dozers 12 4419718 Hitachi ZX330-3G ZX350 M5X180CHB Swing Motor 4419718 13 9298829 Hitachi ZX130-5A Swing Gearbox 9298829 Reduction Drive 14 6245-11-1100 Komatsu Cylinder Head 6245-11-1100 for HD465 HD785 Trucks 15 547-9727 Caterpillar 547-9727 Swing Motor Rotary Motor for E395GC Excavator 16 448-9705 Cat 448-9705 593-3841 Hydraulic Fan Pump Motor for E374 395GC Excavato... 17 6210-81-3122 Komatsu PC1250SP-8R Air Compressor Assembly 6210-81-3122 18 21N-60-34100 Komatsu PC1250-7 PC1250-8 Travel Motor 21N-60-34100 19 6152-32-2510 Komatsu Piston 6152-32-2510 - WA470-3 PC400-7 S6D125E/SA6D125E Engine 20 0-24000-0228 Kobelco SK130-8 D04FR Starter Motor 32G6610101 0-24000-0228 24V 10T 21 600-051-2180 Komatsu Clip 600-051-2180 for D65 WA470-6 GD675 22 6E-1111 6E-1111 Hydraulic Cylinder Rod for Caterpillar D8R Dozer 23 183-0691 Caterpillar Fuel Injector BN1830691C1 183-0691 for 3126 3126B C7 Engin... 24 2307490 ECM Control Module 2307490 230-7490 for Caterpillar C11, C13 Engine 25 60167754 Sany SY35 Swing Motor 60167754 Slewing Assembly 26 708-2K-14310 Komatsu 708-2K-14310 Hydraulic Pump Spring for Heavy Excavators 27 6204-31-1100 6204-31-1100 Crankshaft for Komatsu S4D95LE-3 PC78MR-6 WA70-7
