CPU controllers, monitor panels and filter kits for Kobelco excavators — electrical and maintenance parts for dependable machine uptime.
Part No: YN22E00123F5
Genuine pre-programmed CPU controller, plug-and-play installation.
Compatible: Kobelco SK200-6/6E, SK250-6/6E, SK350-6/6E, SK450-6/6E
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Clear LCD excavator display panel compatible with SK-6E/SK-8/SK-8S systems.
Compatible: Kobelco SK75-8 through SK500XD series machines
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Complete engine protection filter kit with oil, fuel filters and seals.
Compatible: Kobelco SK75-8, SK200-6/8/10, SK250-6/8/10, SK350-8, SK480-8, SK500XD
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A field guide to how this system is put together, what it does, and where it fails — written by the team that has supplied Kobelco parts since 2007.
A modern Kobelco SK-series machine is controlled electrically and maintained through consumables. The engine ECU and the machine's CPU controller read a network of sensors, decide what the hydraulic system should do, and drive the actuators that make it happen. On the -8 and -10 machines that means an ECU managing common-rail injection and emissions, a CPU controller managing pump flow, travel speed and attachment circuits, a monitor gauge presenting everything to the operator, and a set of sensors — engine speed, oil and water temperature, oil and fuel pressure, angle and potentiometer position, fuel level — feeding both. Relays, fuses and the harness carry power and signal between them.
Because the electrical system is a network, faults rarely stay local. A chafed harness section or a corroded connector can present as a pump that will not stroke, a machine that will not travel in second speed, or a monitor that goes blank intermittently. Operators frequently report an electrical fault as a hydraulic one. The diagnostic order that saves the most time is: read the fault codes first, then confirm the sensor reading against a mechanical gauge, then check the connector and the earth before condemning the controller. Controllers are expensive and are the part most often replaced unnecessarily.
The maintenance side of this category is the opposite of the electrical side — it is entirely predictable. Filters and separator elements are consumed by hours and by dust, and the service intervals in the operator manual exist for good reasons. Fuel filters and water separators protect the high-pressure pump and injectors; on a common-rail engine a missed fuel filter change is a direct route to an injector failure costing many times the filter. Hydraulic return and pilot-inline filters protect the pump. Air filters protect the turbocharger. Cabin and body parts — doors, handles, dust boots and covers — are the parts that keep an operator comfortable and keep water out of the electrical system.
The list below covers every electrical, filter and cabin part we hold in stock, from ECU and CPU controllers and monitor gauges through to sensors, relays, harness sections, alternators and complete filter kits. Several of these parts are model-and-serial specific; the checklist and FAQ below explain exactly what we need from you in order to match them correctly.
Each row is a fault pattern reported by operators in the field, the part that actually causes it, and what to replace at the same time so the repair holds.
| Operator reports | What is actually wrong | What to replace |
|---|---|---|
| Monitor gauge blank, flickering or showing dashes, machine still operates | Monitor gauge assembly failure, or an intermittent supply or earth to the panel. A failing alternator or a corroded fuse-box contact produces the same symptom. | Check supply voltage and earth at the panel connector before replacing the monitor. If voltage is unstable, test the alternator and the fuse box first — a new monitor will not survive a bad supply. |
| Engine derates under load, fault code for rail pressure or boost pressure, no mechanical fault found | Sensor drift — high-pressure sensor, boost-pressure sensor, or a camshaft / engine speed sensor losing signal. Sensors commonly fail gradually rather than completely, so the reading is wrong rather than absent. | Compare the sensor reading against a mechanical gauge. Replace the sensor indicated by the code, and check the connector pins for corrosion. Sensors are far cheaper than the controllers they feed. |
| Machine will not travel in second speed, or an attachment circuit stops responding | Solenoid valve failure or a broken wire in the harness section feeding the solenoid. | Test the solenoid coil for resistance and confirm the harness supplies voltage when the function is commanded. Replace the solenoid or the harness section accordingly. |
| Hard starting, low power, white smoke, premature injector wear | Fuel contamination — blocked fuel filters or a loaded water separator passing water into the high-pressure circuit. Water in a common-rail system damages injectors and pumps quickly. | Renew the fuel filter and the water separator element, drain the separator bowl and inspect the tank for water. This is the cheapest preventive action in the whole machine and the one most often deferred. |
| Hydraulic oil temperature high, oil dark, swarf on the filter element | Blocked hydraulic return or pilot-inline filter, or a cooler that has lost airflow. A bypassing element lets contamination recirculate. | Renew the hydraulic return filter, the pilot-inline filter and, where fitted, the breather filter. Inspect the cooler for external blockage. |
| Battery drains overnight, machine dead in the morning, relays clicking | Sticking relay or a short in a harness section. Safety relay, start relay and preheat relay are the usual candidates on the SK range. | Test for parasitic draw, then replace the suspect relay. Check the harness for chafe at the frame pass-through points, which is where the insulation usually fails. |
Tonnage class, the engine and hydraulic platform each model uses, and what we typically hold for it.
| Machine | Class | Engine & hydraulic platform | In stock for this model |
|---|---|---|---|
| SK130-8 / SK140-8 | 13-14 t | Mitsubishi D04FR · Kawasaki K3V63/K7V63 | D04FR water-temperature sensors, relays and compact-frame filter sets |
| SK200-8 / SK210-8 | 20-21 t | Hino J05E · Kawasaki K3V112 / K7V125 | J05E ECU speed sensors, monitor gauge assemblies, alternators and oil/fuel filters |
| SK220-10 / SK250-8 | 22-25 t | Hino J05E · Kawasaki K7V125 | Potentiometers, angle sensors, high-pressure sensors and fuse-box relays |
| SK260LC-8 / SK260-10 | 26 t | Hino J05E · Kawasaki K7V125 | Monitor gauges, oil-pressure sensors and full filter service kits |
| SK330-8 / SK350-8 | 33-35 t | Hino J08E · Kawasaki K5V140 | J08E ECU controllers, harness sections, safety relays and air-filter assemblies |
| SK350-9 / SK380-10 | 35-38 t | Hino J08E · Kawasaki K5V140 / K7V140 | CPU controllers, limit switches, connectors and fuel-water separator filter assemblies |
| SK460-8 / SK480-8 | 46-48 t | Hino P11C · Kawasaki K3V180 | P11C alternators, oil-temperature sensors, cable harnesses and level-warning sensors |
| SK500XD / SK550-10 | 50-55 t | Hino P11C · Kawasaki K5V200 | Fuse boxes, key switches, working switches and heavy-duty filter sets |
Tonnage follows the Kobelco model number: the digits after SK give the operating weight in hundreds of kilograms, so an SK250 is a 25-tonne class machine and an SK350 is a 35-tonne class machine. Short-radius SR variants use the same engine and hydraulic families as their standard counterparts, with different mounting hardware.
The prefix families you will see on a Kobelco parts diagram for this system, what they mean, and real numbers from our own inventory as examples.
| Prefix / format | What it tells you | Examples from our stock |
|---|---|---|
| ECU vs CPU controller | Two different boxes doing two different jobs. The ECU manages the engine, injection and emissions; the CPU controller manages machine functions — pump flow, travel speed, attachment circuits. They are not interchangeable and are ordered separately. | ECU Controller · CPU Controller · Monitor Gauge Assy |
| VA32 / VA34 sensor numbers | Mitsubishi-supplied and Kobelco-wrapped sensor and electrical hardware used across D04FR / D06FR and the larger machines. | VA32F1900300 · VA3431100800 · VA32G9000201 |
| YN / YT / YV series | Kobelco electrical and control part families — sensors, switches, relays and monitor hardware on the SK range. | YN52V01008S005 · YT58S00006P1 · YN58S00009F1C |
| LC13 / LC52 series | Fuse, relay and panel hardware. LC13 numbers cover fuses and fuse-box contents. | LC13E01175S002C · LC52S00012P1 |
| Sensor suffix codes | In sensor part numbers the trailing letters identify the connector type and the signal range. Two sensors with the same body but different suffixes will not interchange. | Oil Press Sensor · Water Temperature Sensor · Angle Sensor |
| Filter cross-reference | Filters carry both a Kobelco number and the filter maker's own number. Both are printed on the element; either can be used to identify the correct replacement. | Oil Filter · Fuel Filter · Air Filter Assy · Hyd Return Filter |
A Kobelco part is frequently identified by more than one number: the Kobelco catalogue number that appears on the parts diagram, and the original manufacturer number stamped on the component itself. Send us either and we will return the full interchangeable list, including supersessions, before you order.
The ten lines we hold in the greatest quantity right now, with live part numbers and model coverage. Quantities are updated from our Guangzhou warehouse.
| Part number | Description | Fits | In stock |
|---|---|---|---|
| VHS894101290/9443615946/479770-3920 | ECU Speed Sensor | 615, J05E, J08E | 387 |
| YN52S00103P1 | High Press Sensor | SK-10 | 335 |
| YN52S00032P1 | Potentiometer | Kobelco SK-series | 273 |
| VAMC849577/9443613286/479748-0620 | ECU Speed Sensor | 613, 620, 6D34 | 226 |
| YN21P01088R100J1N | Oil Filter | R100 | 122 |
| YN24S00003F1BR-632 | Relay Assy | 632 | 115 |
| VAMC845235/9443613106 | ECU Speed Sensor | 613 | 89 |
| LS52S00015P1 | High Press Sensor | Kobelco SK-series | 81 |
| YN52S00103P1CT | High Press Sensor | Kobelco SK-series | 80 |
| YN11P00034R100 | Air filter Set | SK200-8 | 71 |
Every electrical & maintenance line we hold in Guangzhou, listed by part number with its current quantity. 98 part numbers, 2483 pieces on the shelf. Click any line for photos, interchangeable numbers and machine fitment.
What we need from you to ship the right part first time — and the mistakes that cause returns in this category.
Read the fault code and then verify the sensor mechanically. If the code says rail pressure is low, fit a mechanical gauge to the rail and compare. If the gauge agrees with the sensor, the sensor is telling the truth and the problem is hydraulic or mechanical. If the gauge disagrees, replace the sensor. Controllers are the last thing to change, not the first — they fail far less often than the sensors and connectors feeding them.
No. Kobelco changed controller and monitor hardware several times across the -6E, -8, -9 and -10 generations, and even within one generation the software and connector pinout can differ between market variants. A controller is matched to the machine serial number and the engine family. Send us the serial number and the number printed on the existing unit and we will match it exactly.
Follow the interval in the operator manual for normal conditions — typically every 500 hours for the fuel filter and every 250 hours for draining the water separator, with element replacement at 500 hours. Shorten both on dusty sites or where fuel quality is variable. On a common-rail engine this is not a maintenance nicety: water and dirt reaching the high-pressure pump and injectors cause damage that costs many times the price of the filters.
Intermittent blanks are almost always a supply or earth problem rather than a failed monitor: a corroded fuse-box contact, a loose earth at the frame, a chafed harness where it passes through a bulkhead, or a failing alternator producing unstable voltage. Test voltage and earth at the panel connector while the fault is present. Replacing the monitor without fixing the supply usually leads to a second failure.
Yes. Give us the machine model and the engine family and we will assemble the full service set — engine oil filter, fuel filter or water separator, air filter, hydraulic return filter and pilot-inline filter — as one quotation with the current stock quantity on each line. Filter kits are also listed among the individual product pages linked from this category.
We supply all three where they exist and state on the quotation which one you are being offered. Sensors, relays and filters are frequently available as the original manufacturer's own-brand part — the same component without the Kobelco box — at a lower price. Controllers and monitors are normally supplied genuine. For the authorized brands we represent, including Mitsubishi Heavy Industries and Garrett, parts come through the official distribution channel and carry the authorization to match.
