Service parts for the ISX12
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredOil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
Ratings spec sheet not in our library yet — see the documents below.
Filters & service parts
model family| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | FF5776/FF5825/OEM | 15000 hr | buy | ||
| Oil filter | LF9070 | 15000 hr | Amazon eBay $50.00 KuduParts $68.00 | ||
| Coolant filter | 50,000 mi 80,000 km | — | 50000 hr | ||
| Oil | 30,000 mi 48,000 km | 2.0 | — | 6 hr |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Fuel | EN590 (Europe); ASTM D975 (North America) | Engines must be operated using only diesel fuel having no more than the maximum sulfur content corresponding to the engine's emissions certification as listed on the dataplate. Maximum sulfur levels: EPA 2007/2010/2013/2017/2021/2024 max. 15 parts per million; EPA Tier 4 Interim / Final / Stage V in North America max. 15 parts per million; EU Stage IIIB 2011 max. 15 parts per million; EU Stage IV 2011 max. 15 parts per million; EU Stage V max. 10 parts per million; Euro 4/5 max. 50 parts per million; Euro 6 max. 10 parts per million. See Cummins Fuel Bulletin #3379001 Table 1 (Cummins Inc. Required Diesel Fuel Specifications). |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What oil filter does the Cummins/Onan ISX12 use?
The Cummins/Onan ISX12 uses oil filter part number LF9070.
What fuel filter fits the Cummins/Onan ISX12?
The Cummins/Onan ISX12 uses fuel filter part number FF5776/FF5825/OEM.
Parts
24model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 288195800 | Kit, Liner | 6 | Kit | buy |
| 288196100 | Kit, Main Bearing | 1 | Kit | buy |
| 2883266 | Liner | Liner | buy | |
| 430917400 | Kit, Con Rod Bearing | 6 | Kit | buy |
| 4309391 | Kit, spark plug | 6 | Spark plug | Amazon eBay $169.26 FridayParts $48.20 |
| 430939100 | Kit, Spark Plug | 6 | Kit | buy |
| 4352657 | Piston | Piston | buy | |
| 437627100 | Kit, Engine Piston | 6 | Kit | buy |
| 4376466 | Kit, upper engine gasket | 1 | Gasket | buy |
| 437646600 | Kit, Upper Engine Gasket | 1 | Gasket | buy |
| 4975069 | Gasket, oil pan | 1 | Gasket | FridayParts $141.75 |
| 497506900 | Gasket, Oil Pan | 1 | Gasket | buy |
| 5467781 | Liner | Liner | buy | |
| 5472970 | 150mm APR Liner | 1 | Cylinder liner | Amazon eBay FridayParts $100.00 |
| 5473000 | 152mm APR Liner | 1 | Cylinder liner | Amazon eBay |
| 5579425 | Piston Cooling Nozzles | 1 | Pump | Amazon eBay |
| CV50626 | Crankcase Breather Element | 1 | Crankcase breather element | eBay FridayParts $58.88 |
| CV50633 | Crankcase Breather Element | 1 | Crankcase breather element | eBay $38.49 FridayParts $68.00 KuduParts $68.00 |
| FF5776 | Fuel Filter (Pressure) | 1 | Fuel filter | eBay KuduParts $67.00 FridayParts $69.00 |
| FF5825 | Fuel Filter (Pressure) | 1 | Fuel filter | buy |
| LF9070 | Lubricating Oil Filter | 1 | Oil filter | Amazon eBay $50.00 KuduParts $68.00 |
| 2881961 | Kit, main bearing | 1 | Service part / kit | FridayParts $292.99 |
| 4309174 | Kit, con rod bearing | 1 | Service part / kit | buy |
| 4376271 | Kit, engine piston | 6 | Service part / kit | buy |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
This page was generated from the 10 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.