179-9850 10R-8982 ECM Engine Controller for Caterpillar CAT 325C 322C 3126B
179-9850 / 10R-8982 ECM for Caterpillar 3126B, 325C and 950G II.
- Interchangeability: One module, four references: 179-9850, 1799850, 10R-8982, 10R8982. Direct fit on the existing harness.
- Application: Fits for Caterpillar 3126B engines, 322C / 325C / M325C excavators, 938G II–966G II loaders, IT62G II, 570B / 580B.
- Check Your Generation: Listed for G II machines and the 3126B engine — not the earlier 950G or plain 3126. Read the plate.
- Programmed Before Dispatch: Send your ESN and VIN after checkout — we flash it to your engine before shipping.
$1,399.00
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Bench-Tested - Every unit powered up and function-tested before dispatch.
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6-Month Warranty - From delivery, against defects in materials and workmanship.
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30-Day Returns - Unused items in original packaging. RMA required.
Product Details
179-9850 (1799850), also referenced as 10R-8982 (10R8982) — a remanufactured, direct-replacement engine control module for Caterpillar 3126B industrial engine builds, 322C and 325C excavators, 938G II through 966G II wheel loaders, the IT62G II toolcarrier and 570B / 580B wheel harvesters.
The 3126B platform put one control module across a very wide spread of machines, and the cores reflect every one of those duty cycles — loader shuttle shifting, excavator vibration and the constant shock loading of harvester work. Each unit is dismantled, the board is cleaned and inspected under magnification, and the components that age out first are replaced with new parts: supply regulators, injector driver outputs and the fatigued solder beneath the harness headers. Continuity is verified through the header pins, moisture protection is re-applied, the housing is resealed, and the finished module is run on a bench harness and function-tested to factory-specified operating parameters before packing.
- One module, four reference formats. 179-9850 and 1799850 are the base reference; 10R-8982 and 10R8982 are the remanufactured-series numbering for the same unit. Any of the four on your paperwork points here.
- Covers an unusually mixed fleet from a single number: C-series excavators, G II wheel loaders, an integrated toolcarrier and forestry harvesters, all built on the 3126B engine platform.
- Direct replacement — existing mounting bracket, existing harness connectors, no machine-side modification.
- Rebuilt to restore original operating parameters; factory calibration, engine protection and emissions strategy are left exactly as defined.
- Driver outputs and supply components renewed rather than cleaned and passed through, with the board re-coated for the dust, sap and washdown exposure typical of loader and harvester work.
- Programmed to your engine before dispatch: send us your ESN and VIN after checkout and the module ships flashed and ready to install, rather than as a bare unit you have to get coded locally.
Send Us Your ESN and VIN — We Program The Module Before It Ships
Your module is flashed and configured to your engine here, before it leaves us, so it arrives ready to fit rather than needing to be coded at your end. We cannot begin that work until we have your engine details, and the 1–3 business day dispatch window starts from the moment we receive them. A wheel loader, an excavator and a harvester on the same engine platform take quite different configurations, so tell us exactly what the module is going into. Please send:
- Engine Serial Number (ESN) and Vehicle Identification Number (VIN)
- Clear photographs of the ECM currently fitted, with every number on the label legible — note whether it shows 179-9850 or 10R-8982
- A photograph of the engine data plate showing the arrangement number, and confirmation that the engine is a 3126B rather than an earlier 3126
- The machine designation exactly as it appears on the plate, including any G II or MH suffix — for example 950G II, M325C MH or IT62G II
Removal and refitting should be carried out by an experienced technician. Isolate the batteries at the master disconnect before opening any connector and keep the connectors capped while the module is off the machine. Keep the outgoing unit until the replacement is fitted and running: if it still communicates at all, a workshop can usually read the stored parameters off it first, which shortens commissioning considerably.
Fitment & OEM Interchange
Caterpillar and CAT machine model designations appear below only to identify the equipment this aftermarket module is built to fit. The OEM interchange numbers listed are cross-reference data for identification purposes and do not imply that this part is made, supplied or endorsed by the trademark holder.
Part Number Cross-Reference
| Reference Number | Format / Role | Notes |
|---|---|---|
| 179-9850 | Base reference, hyphenated | The form printed in machine service literature. |
| 1799850 | Base reference, no hyphen | How the number is normally entered into parts and stores systems. |
| 10R-8982 | Remanufactured-series reference, hyphenated | The same module under remanufactured-series numbering; often the number on the label of a unit that has been replaced once already. |
| 10R8982 | Remanufactured-series reference, no hyphen | The searchable form of the same remanufactured-series number. |
Related Reference Numbers — Same Replacement Family
All four numbers above are the same module, so there is nothing to choose between them. The references below are different parts covering adjacent machines, listed here in case the label on your unit does not match.
| Reference Number | Typical Coverage Difference |
|---|---|
| 262-2879 / 2622879 | The later D-series excavator generation on C7 / C9 / C18 engines — a different platform, not a substitute for a 3126B machine. |
| 151-2106 / 10R-5608 | Covers the much larger 365 and 385 class excavators and the 5090B front shovel. |
Application Chart — Fits For Caterpillar
| Machine / Engine Category | Models |
|---|---|
| Industrial Engine | 3126B |
| Excavator | 322C, 325C, 325C L, 325C FM, M325C, M325C MH |
| Wheel Loader | 938G II, 950G II, 962G II, 966G II |
| Integrated Toolcarrier | IT62G II |
| Wheel Harvester | 570B, 580B |
Before You Order
Two checks before you order, and both catch real mistakes. First the generation suffix: a 950G and a 950G II are not the same machine here, so read the designation exactly as it appears on the plate. Second the engine: this module is listed against the 3126B, not the earlier 3126, and the two are easy to confuse on a machine that has been re-powered at some point in its life. Then confirm the reference on the label of the module you are removing — either 179-9850 or 10R-8982 tells you that you are on the right part. Photograph the module label and the engine data plate and send both to us, and we will confirm the match before you pay.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Name | Electronic Engine Control Unit — ECM / ECU Module |
| Reference Numbers | 179-9850, 1799850, 10R-8982, 10R8982 (all four refer to the same module) |
| Condition | Remanufactured — rebuilt from a tested core |
| Installation Method | Direct replacement — mounts to the existing bracket and mates with the existing machine harness |
| Programming | Programmed before dispatch — we flash the module to the ESN and VIN you supply after checkout, so no flashing is required on arrival. Loader, excavator and harvester installations take different configurations, so confirm the machine when you send your details |
| System Voltage | 24V nominal on the machines listed — application dependent, confirm on the data plate |
| Housing Material | Sealed die-cast aluminium case with integral heat-sink face |
| Connectors | Sealed multi-pin machine harness connectors — pin count is application dependent, match against the module being replaced |
| Circuit Protection | Reverse-polarity and transient suppression to factory-specified design; no protection features removed or bypassed |
| Testing | Powered up and function-tested on a bench harness before dispatch |
| Warranty | 6 months from delivery, against defects in materials and workmanship |
| Package Contents | 1 × engine control module. Brackets, harness, gaskets and software licences are not included. |
This module is supplied to restore factory-specified performance and original operating parameters only. Emissions-related calibration and engine protection strategies are left exactly as the factory defined them; we do not supply, alter or support any change to emissions control functions.
Common Failure Symptoms
Because this module runs loaders, excavators and harvesters, the complaint that reaches the workshop varies with the machine even when the underlying fault is the same. The table below covers what most reliably points at the control module across this group.
| Symptom | What It Usually Points To |
|---|---|
| Loader bogs down or stalls when the bucket loads up, though the transmission and torque converter test correctly | The module is not holding fuel delivery as engine load rises, or the load signal it produces has gone wrong. |
| Engine keeps running after the key is turned off and has to be stalled out | An output stage inside the module stuck holding the fuel command active. |
| Harvester crane or head functions become erratic while the engine itself sounds normal | The machine control is receiving wrong or missing engine speed and load data from the ECM. |
| Intermittent no-start that clears after several key cycles, worse first thing in the morning | A marginal internal supply or a degraded capacitor that will not come up reliably when cold. |
| Throttle or decel pedal input ignored with both pedal and sensor testing within spec | A failed input circuit inside the module on that specific channel. |
| Injector solenoid codes logged on several cylinders in the same event | A driver bank inside the module has failed, rather than multiple injectors failing at once. |
| Machine monitor shows blanks or frozen values where engine data should be | The module is still running the engine but has stopped transmitting reliably on the data link. |
| Sudden derate accompanied by a cluster of unrelated sensor codes logged together | Collapse of the regulated sensor supply the module generates internally. |
Rule Out The Cheap Causes First
Machines on this platform are now old enough that the wiring is usually the culprit. Load-test the batteries, clean and torque the engine-to-frame ground straps, check the ECM supply fuses and relays, and open both connectors to look for water, green corrosion and back-out terminals. On wheel loaders, pay particular attention to the harness at the articulation joint, and on harvesters check for chafe where the loom crosses the boom pivot — both produce intermittent faults that look exactly like a dying module.
Shipping & Quality Guarantee
- Dispatch: orders are dispatched in 1–3 business days after the fitment details are confirmed.
- Free express delivery: DHL / FedEx / UPS, 3–8 business days door to door.
- Tracking: a tracking number is issued within 24–48 hours of dispatch.
- Bench-tested: every unit is powered up and function-tested before it leaves the workshop.
- 6-month warranty from delivery, against defects in materials and workmanship.
- 30-day returns on unused items in their original packaging; an RMA number is required before shipping anything back.
- Protective packaging: anti-static bag, foam-lined carton, connector caps fitted to keep the pins clean in transit.
- Technical support: send us your data plate photos and we will confirm the reference number before and after the sale.
Shipping & Customs Notice
The amount charged covers the product and shipping only. Import duties, VAT, GST, customs clearance charges and any other local taxes are not included and remain the responsibility of the buyer. Please check your own country’s import rules before ordering.
Caterpillar®, CAT® and all machine and engine model designations are the registered trademarks of their respective owners. We are an independent supplier of aftermarket replacement parts and have no affiliation with, sponsorship from or authorisation by the trademark holder. Reference numbers including 179-9850 / 1799850 / 10R-8982 / 10R8982 are quoted purely as OEM cross-reference data to help you identify the correct fitment.
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