Komatsu Excavator Parts Compatibility: PC Series Guide
Komatsu PC excavators are among the most widely circulated machines on the used-equipment market, and their parts are among the most widely mismatched. A pump quoted from a model number alone can arrive for the wrong generation; a monitor that fits a PC200-7 may not fit a PC200-8. This guide explains how the PC series is organised, which engine and hydraulic families belong to which generation, and how to confirm a part number before you order. The Komatsu numbering system rewards buyers who read it carefully, because a correct part number resolves brand, class, generation and revision in one line.
Read the Model Code First
Every PC model carries three pieces of information: the weight class, the generation suffix and the market variant. PC200-8 means a 20-tonne machine of the -8 generation; PC200LC-8 adds the long-undercarriage chassis; PC210-8 is the same generation with a different engine and counterweight arrangement. The suffix is what matters for parts: -5, -6 and -7 machines share many hydraulic geometries, while -8 and -10 machines moved to common-rail engines, electronic monitoring and revised pump mounting. Ordering parts across a generation boundary is where most wrong shipments begin.
|
Generation |
Typical models |
Engine family |
Parts note |
|
-5 / -6 |
PC100-5 / PC120-6 / PC200-6 |
4D95 / S6D102 |
Mechanical injection, gauge cluster |
|
-7 |
PC120-7 / PC200-7 / PC300-7 |
S6D102 / SAA6D114 |
Electronic monitor, refined hydraulics |
|
-8 |
PC200-8 / PC300-8 / PC400-8 |
SAA6D107E-1 / SAA6D114E / 6D125 |
Common rail, controller panel |
|
-10 |
PC200-10 / PC240-10 |
Tier-4 final |
Latest monitor and harness generation |
Engine Parts Follow the Engine, Not the Model
Two PC200 machines can carry different engines depending on build year and market. The compact classes - PC70-8 through PC130-8 - mostly run the 4D95 family, while PC200-6 and PC200-7 use the S6D102, and PC200-8 stepped up to the SAA6D107E-1. Mid-size PC300-8 and PC350-8 machines run the SAA6D114E, and the PC400-8 class runs 6D125 engines. Serial ranges matter as much as engine families: two machines of the same model can differ by build month, and injector harness length and pump drive change with them. That is why injector cross-references matter - many Komatsu injectors are Denso- or Bosch-built and carry Cummins QSB cross numbers, so a verified listing such as our 6D114 common rail injector 6745-11-3102 resolves three reference systems at once. Always confirm the engine model stamped on the valve cover before choosing components from the engine parts range.
Hydraulic Pumps and Valves by Class
Komatsu main pumps are built around Kawasaki and KPM geometries, and the part number encodes the class. The 708-2L series serves PC200-7 and PC220-7 machines, as shown in our PC200-7 / PC220-7 main pump 708-2L-00300 listing; the larger 708-2H series is found on PC400-8 and PC450-8, listed as PC400-8 / PC450-8 main pump 708-2H-00027. Valve-side, the suction relief valve 723-40-91200 is shared across the PC200-7 and PC200-8 generations, which makes it one of the few hydraulic parts that crosses a generation boundary safely. When a pump is quoted, ask which serial range the unit was pulled from - mounting faces and control-valve interfaces changed between -7 and -8 builds.
Travel Device and Final Drive
The travel reducer is generation-specific in a way pumps are not. PC200-7 machines use the 20Y-27-00300 gearbox, while -8 machines moved to 20Y-27-00500 and 206-27-00311 families, and the mini classes run completely different MAG and GM travel motors. Swapping a reducer across generations changes the ratio and the motor mounting, so the machine will turn but will not track straight at speed. For PC200-7 owners, the PC200-7 travel gearbox 20Y-27-00300 page shows the exact unit and its companion numbers.
Electrical: Monitors, Sensors and Throttle Motors
Electrical fitment changed most between generations. The PC200-7 / PC300-7 / PC400-7 monitor 7835-12-3006 covers the PC200-7, PC300-7 and PC400-7 clusters, while -8 machines moved to the controller panel and V-ECU architecture, where the controller panel V-ECU 7835-26-1005 serves PC200-7 through PC230-7. Below the cab, the pressure sensor 206-06-61130 and the throttle motor 21W-43-2122 are high-turnover items on PC200-7 and PC300-7 machines. Because these parts are model-specific and often firmware-linked, we keep the throttle motor range pages updated by machine series, and the monitor and sensor listings carry the exact reference numbers in their titles.
Compatibility Quick Reference
|
System |
Fits |
Part number |
Note |
|
Main pump |
PC200-7 / PC220-7 |
708-2L-00300 |
-7 class standard |
|
Main pump |
PC400-8 / PC450-8 |
708-2H-00027 |
Large-class -8 |
|
Suction relief valve |
PC200-7 / PC200-8 |
723-40-91200 |
Crosses -7 / -8 boundary |
|
Travel gearbox |
PC200-7 |
20Y-27-00300 |
Generation-specific ratio |
|
Monitor |
PC200-7 / PC300-7 / PC400-7 |
7835-12-3006 |
Gauge cluster |
|
Controller panel |
PC200-7 ~ PC230-7 |
7835-26-1005 |
V-ECU architecture |
|
Pressure sensor |
PC200-7 / PC300-7 |
206-06-61130 |
Hydraulics and engine |
|
Throttle motor |
PC75UU and PC series |
21W-43-2122 |
Electronic throttle |
Five Checks Before You Order
· Photograph the machine's model plate and the old part's casting numbers, then match both against the listing title.
· Confirm the engine model on the valve cover before ordering any fuel-system component.
· Check the generation suffix twice: -7 and -8 parts look similar but rarely interchange.
· For electrical parts, verify the monitor or controller architecture, not just the connector shape.
· Ask the supplier to confirm fitment against your serial number in writing before payment.
Three Mistakes That Cost a Second Shipment
First, ordering from the model number alone: PC200 covers four engine families and three monitor generations. Second, trusting connector shape for electrical parts, when firmware and panel architecture decide fitment. Third, mixing travel reducers across generations - the machine runs, the tracks wear unevenly, and the job slips a week. Each mistake is avoidable with one photo and one confirmation email.
Frequently Asked Questions
Q: How do I know which generation my Komatsu PC machine is?
A: The model plate lists the full model with its suffix, such as PC200-8 or PC210LC-8. The suffix after the dash is the generation; LC marks the long chassis. If the plate is missing, the serial number prefix identifies the build year.
Q: Can I use a PC200-7 pump on a PC200-8?
A: No. Mounting faces, control interfaces and pressure settings differ. Only a few components, such as the 723-40-91200 suction relief valve, are documented to cross that boundary.
Q: Do you verify fitment before shipping?
A: Yes. Send the model plate photo, serial number and the old part's casting numbers; we confirm the exact reference against live stock and reply with the fitment in writing.
Confirm Fitment Before You Buy - Get a Quote Today
Send us the model plate and the casting numbers from the failed component, and we will confirm fitment before quoting. Message our WhatsApp at +86 18758866446 or request a quote through the contact page for price and lead time within four working hours.
