The Komatsu PC200-6 swing gearbox<\/strong> is one of the most sourced excavator swing drive components in the aftermarket \u2014 partly because the PC200-6 is one of the best-selling 20-tonne excavators ever built, and partly because its swing gearbox has a finite service life under continuous commercial use. This guide covers everything a repair shop, fleet manager, or OEM parts importer needs to know before placing an order: part numbers, serial range verification, OEM vs aftermarket comparison, compatible machine list, and what to expect on lead time and documentation.<\/p>\n<\/div>\n <\/p>\n The Komatsu PC200-6 swing gearbox<\/strong> is a multi-stage planetary reducer that drives the full 360\u00b0 rotation of the excavator’s upper structure. It sits between the hydraulic swing motor and the machine’s ring gear, converting high-speed motor output into the slow, high-torque rotation needed to swing the cab, boom, arm, and bucket assembly through each dig-and-swing cycle.<\/p>\n On the PC200-6, this is a 2-stage planetary gearbox. The first stage handles the highest rotational speed from the hydraulic motor; the second stage multiplies torque to the output that engages the ring gear. Output torque on a standard PC200-6 swing gearbox is approximately 29,000\u201335,000 Nm<\/strong> depending on configuration.<\/p>\n When this unit fails, the machine’s upper structure cannot rotate. That stops all productive work \u2014 trenching, loading, grading \u2014 until replacement is complete. Average replacement time with a correct-fit unit is 4\u20136 hours<\/strong>. Using a unit that requires shimming or adaptor work adds 2\u20134 hours to that estimate and introduces additional failure risk at the adaptor interface.<\/p>\n <\/p>\n The two OEM part numbers you’ll encounter for the PC200-6 swing gearbox are 20Y-26-00150<\/strong> and 20Y-26-00151<\/strong>. Both are genuine Komatsu OEM part numbers for the PC200-6 swing reducer, but they apply to different serial number ranges and machine variants.<\/p>\n \u26a0\ufe0f Critical:<\/strong> Always cross-reference your machine’s serial number prefix before specifying which part number to order. Komatsu PC200-6 machines built across different production years may use different internal configurations even under the same model designation. If you are unsure, send the serial prefix to your supplier for confirmation before payment \u2014 this takes minutes and prevents a costly incorrect shipment.<\/p>\n <\/p>\n The PC200-6 was produced across multiple years with incremental engineering changes. The serial number prefix on your machine (located on the frame plate, typically near the cab mounting area) tells you which production batch your machine belongs to \u2014 and therefore which gearbox specification applies.<\/p>\n The three-step confirmation process before ordering:<\/p>\n If the failed gearbox is already removed from the machine, photograph the OEM part number stamped or labelled on the gearbox housing itself. This is the most direct reference and eliminates serial range ambiguity entirely.<\/p>\n <\/p>\nWhat Is the PC200-6 Swing Gearbox and What Does It Do?<\/h2>\n
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<\/p>\nPart Numbers: 20Y-26-00150 and 20Y-26-00151 \u2014 What’s the Difference?<\/h2>\n
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\n \nPart Number<\/th>\n Equipment<\/th>\n Series \/ Stock Code<\/th>\n Application<\/th>\n<\/tr>\n<\/thead>\n \n 20Y-26-00150<\/td>\n Komatsu PC200-6<\/td>\n #96514- \/ 9202983<\/td>\n Direct OEM-spec replacement<\/td>\n<\/tr>\n \n 20Y-26-00151<\/td>\n Komatsu PC200-6 (variant)<\/td>\n #96514- \/ 9202983<\/td>\n Cross-reference for specific serial ranges<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n Serial Range Verification: How to Confirm Your Machine Needs This Part<\/h2>\n
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Compatible Machine Models Beyond the PC200-6<\/h2>\n