Views: 0 Author: Site Editor Publish Time: 2026-07-07 Origin: Site
The Komatsu PC200-8 cooling system is not one part; it is a stack of heat exchangers, airflow parts, hydraulic cooling parts, engine cooling parts, and A/C cooling parts working together. When a PC200-8 overheats, loses A/C performance, or runs high hydraulic oil temperature, the problem may come from the hydraulic oil cooler, radiator, A/C condenser, fan airflow, bypass valve, thermostat, hoses, filters, or a blocked cooling stack.
This guide focuses on the parts a buyer should identify before ordering replacement cooling components for Komatsu PC200-8 and PC200LC-8 excavators.
Part | What It Cools | Common Symptoms | Matching Data Needed |
|---|---|---|---|
Hydraulic oil cooler | Hydraulic return oil | Hydraulic oil overheating, weak function when hot, oil cooler leak | OEM number, core size, port direction, mounting points, serial range |
Radiator | Engine coolant | Engine overheating, coolant loss, steam, high water temperature | Engine model, hose necks, core size, mounting frame |
A/C condenser | Refrigerant | Weak cab A/C, high refrigerant pressure, condenser leak | Port type, fitting direction, core size, bracket shape |
Fan and shroud | Airflow through cooling stack | Overheats at low speed or under load, poor airflow through cores | Fan diameter, blade direction, shroud and seal condition |
Thermostat and hoses | Coolant flow control | Slow warm-up, overheating, coolant circulation issue | Engine model, thermostat housing, hose routing |
Hydraulic oil cooler 20Y-03-42461 is a common PC200-8 / PC200LC-8 replacement reference, but serial range and dimensions still need confirmation.
One common hydraulic oil cooler reference for PC200-8 and PC200LC-8 is 20Y-03-42461. Public parts listings commonly associate it with PC200-8 / PC200LC-8 serial ranges such as S/N 315646-UP and S/N 350001-UP, with a core size around 890 x 300 x 120 mm. Treat these as reference points, not a substitute for checking the old cooler.
Item | Example Reference | Buyer Check |
|---|---|---|
Part number | 20Y-03-42461 / 20Y0342461 | Compare old tag, invoice, and parts book. |
Application | PC200-8 / PC200LC-8 | Confirm serial range and machine market. |
Core size | About 890 x 300 x 120 mm | Measure the old core, not only overall assembly. |
Ports and mounts | Variant-sensitive | Send photos of ports, brackets, and mounting holes. |
PC200-8 excavators often work in dust, mud, demolition debris, and high ambient temperatures. Dirt can pack between the cooling modules, so the front face may look acceptable while the space between radiator, oil cooler, condenser, and other cores is blocked.
Clean between cores, not only the front surface.
Check whether foam seals or shrouds are missing.
Inspect fan belt, fan blade direction, and fan airflow.
Measure temperature drop across the hydraulic oil cooler.
Check bypass valve and return filter if hydraulic oil runs hot quickly.
Check coolant level, thermostat, radiator cap, and water pump if engine temperature rises.
Cooling performance depends on airflow through the complete stack, not only one new part.
Symptom | Likely Area | Parts to Inspect |
|---|---|---|
Hydraulic oil heats in 20-30 minutes | Hydraulic cooling or pressure loss | Oil cooler, bypass valve, return filter, relief valve, pump case drain |
Engine coolant temperature high | Engine cooling system | Radiator, thermostat, fan belt, water pump, radiator cap, coolant hoses |
Cab A/C weak at idle | A/C heat rejection or fan airflow | A/C condenser, fan airflow, refrigerant charge, compressor |
All temperatures rise under load | Cooling stack airflow | Radiator, oil cooler, condenser, shroud, seals, fan |
Machine model: PC200-8 or PC200LC-8
Serial number or serial range
Engine model and market version
OEM number from old part or parts book
Core size and overall size
Port size, port direction, and hose routing
Mounting hole spacing and bracket photos
Photos of installed cooling stack before removal
Failure reason: leak, overheating, impact damage, internal blockage, or missing part
Elecdura supports Komatsu hydraulic oil coolers, hydraulic oil cooler, wholesale hydraulic oil cooler, and off-highway cooling parts. For PC200-8 orders, send the old cooler photos, serial number, core dimensions, port direction, and target quantity so we can check compatibility before bulk shipment.
