KYB MSG-27P Hydraulic Swing Motor and Slewing Drive Assembly Optimize the superstructure rotational performance, precision alignment, and hydraulic efficiency of your compact fleet with premium-grade KYB replacement swing motor assemblies. Engineered precisely for the 3-ton to 6-ton mini excavator category, these high-pressure axial piston units deliver smooth acceleration metrics and robust mechanical braking torque under continuous multi-function trenching operations. Multi-Brand Excavator Compatibility & Specifications The universal high-tolerance engineering of the hydrostatic series enables it to function as a direct drop-in hydraulic source for multiple international equipment lines: Sunward Mini Excavator Series: SWE45, SWE50, SWE60, SWE70, SWE70B Yuchai Machinery Series: YC35, YC35-7, YC45, YC50, YC60, YC60-7 Hitachi Construction Lines: EX55S, ZAX55S, ZX60, ZX60-3, ZX60-5A LiuGong Machinery Tonnage: CLG904, CLG904D, CLG906, CLG906D, CLG906E Associated Engine Applications: Yanmar 3TNV88, Yanmar 4TNV94L, Yanmar 4TNV98, Kubota V2607 Diesel Engines KYB MSG-27P Series Technical Breakdown This compact hydrostatic power block combines a high-speed rotating piston kit and an integrated mechanical friction brake system within a unified casting housing. This protective layout prevents pressure drift and shields internal cylinders from cavitation during sudden directional changes. Part Numbers & Production Variations Primary Engineering Series Layout: MSG-27P OEM System Production Code: B229900002614 Interchangeable Model Configuration Codes: MSG-27P-10E, MSG-27P-16E, MSG-27P-18E, MSG-27P-23E, MSG-27P-23E-7 Cross-Reference Spare Markings: RC788-61700, 9286324 Internal Planetary Reduction Gears & Maintenance Spares To support standard workshop rebuild schedules and eliminate field operational delays during overhauls, a full range of high-tolerance internal components is supported for direct mechanical replacement. Related Service and Repair Elements Rotary Motor Spares: Piston shoe groups, cylinder barrel blocks, valve timing plates, and set retention guides Planetary Reducer Gearing: Output pinion vertical drive shafts, central sun gears, and multi-stage planetary carrier blocks Dynamic Sealing Systems: High-pressure shaft oil seals, heavy-duty casing roller bearings, and complete nitrile O-ring kits Key Technical Advantages Integrated Pressure Relief Shock Absorber: Built-in crossover cushion valves dampen severe hydraulic spikes during rapid rotational stopping maneuvers, preserving the primary slewing ring gear teeth from micro-fractures. Induction-Hardened Metallurgy: Critical planetary profiles and sliding friction parts undergo specialized heat treatment to resist surface pitting caused by particulate-heavy lubricants under high thermal conditions. Direct Flange Mounting: Machined precisely to original equipment specifications for instant alignment with the factory center joint connection, allowing quick field drop-in assembly with zero retrofitting. Related Part Numbers NO P.N. NAME 1 600-463-6201 Komatsu Electronic Control Unit 600-463-6201 ECU 2 6245-11-5500 6245-11-5500 muffler for SAA6D170E-5CR-W engine for Komatsu PC1250SP-8... 3 14X-15-22710 14X-15-22710 Komatsu friction pad. Compatible with models D65 and D85. 4 705-95-05140 Komatsu Hydraulic Pump 705-95-05140 for HD605 5 219-2622 Caterpillar D6R Transmission Assembly 219-2622 315-9959 180-3431 for D... 6 561-30-81101 Wheel Rim Assembly 561-30-81101 for Komatsu Heavy-Duty Machinery 7 9286324 Hitachi ZX60 Swing Motor 9286324 Slewing Assembly 8 208-26-63150 Komatsu Swing Carrier 208-26-63150 for PC1250-7 Excavator 9 SAA6D140E-5 SAA6D140E-5 Complete Engine Assembly for Komatsu PC800-8 PC850-8 Excav... 10 707-88-26230 Komatsu Bucket Cylinder Assembly 707-88-26230 for PC2000-8 11 6215-31-1101 Crankshaft 6215-31-1101 6219-31-1100 for Komatsu HD785 PC2000-8 12 561-35-61601 Komatsu 561-35-61601 Relay Valve Assembly HD785-5 HD785-7 13 550-4341 Kawasaki K7V180DTP Main Hydraulic Pump | OEM 550-4341 for CAT 336GC /3... 14 21N-38-00034 21N-38-00034 Komatsu PC1250-7 Hydraulic Pump Transfer Case PTO Assembl... 15 705-51-30820 705-51-30820 Hydraulic Gear Pump for Komatsu WA470 WA480 Series Wheel ... 16 11Y-27-30104 11Y-27-30104 Travel Motor for Komatsu D39 D37 D41 Bulldozer 17 561-52-61140 Komatsu Dust Shield 561-52-61140 561-52-81141 561-40-61610 for HD465 H... 18 511-7957 K7V280DTP Hydraulic Pump 511-7957 for CAT 374GC C15/C18 Excavator 19 21N-38-00080 Komatsu PC1250 PTO Assembly 21N-38-00080 / 21N-38-00082 20 708-2K-00014 708-2K-00014 Hydraulic Main Pump for Komatsu PC3000-6 PC4000-6 21 705-22-28310 705-22-28310 Hydraulic Pump Assembly for Komatsu HD465 HD785 22 6240-61-4701 Komatsu PC1250-7 Fan Belt Tensioner 6240-61-4701 23 11Y-27-10102 11Y-27-10102 Travel Motor Assembly for Komatsu D31 D37 D39-21 Crawler ... 24 706-77-01320 706-77-01320 Swing Motor for Komatsu PC1250-7 Ultra-Large Mining Excav... 25 172-0916 Caterpillar 3516 Crankshaft 172-0916 128-6788 506-1982 26 708-2H-00453 Main Hydraulic Pump 708-2H-00453 708-2H-00450 for Komatsu PC400-7/450-... 27 195-30-66520 Komatsu 195-30-66520 Bogie Track Frame for D375A-5 Bulldozer S/N 55001... 28 393-3606 Seal Kit 393-3606 for Caterpillar (CAT) Hydraulic Cylinder Systems 29 561-80-71100 Komatsu Universal Joint 561-80-71100 (Cross Joint) For Komatsu HD785
