Fleetguard FS1242 Oil-Water Separator
Fleetguard FS1242 is a high-performance spin-on Oil-Water Separator engineered for diesel fuel systems, a core filtration component by Cummins Filtration for heavy-duty equipment. It integrates efficient impurity filtration and water separation, effectively removing free/emulsified water and solid particulates from diesel fuel, and reliably protecting engine injectors, fuel pumps and other key components from corrosion and wear.
This separator features a compact structural design with an outer diameter of 93.04mm and an overall height of 174.9mm, paired with 1-14 UNS-2B threaded port. It perfectly fits the limited mounting space of various heavy-duty equipment, enabling quick installation and replacement without professional tools, and is fully compatible with mainstream diesel engine models in the market.
Compliant with SAE J1985 and ISO 4402 industry standards, FS1242 undergoes strict factory performance testing. It is widely applied in trucks, excavators, engineering machinery and power generation equipment, maintaining stable filtration performance under complex working conditions and serving as a reliable OEM matching part for multiple brands.
Advantages of FS1242 Oil-Water Separator
High-efficiency filtration & separation: It achieves 96% filtration efficiency at 20μm precision, with 90% separation efficiency for both free and emulsified water in fuel, thoroughly eliminating fuel system contamination and reducing the risk of component failure.
Excellent structural compatibility: Adopting standard spin-on design and universal 1-14 UNS-2B threaded interface, it is a direct replacement for multiple cross-reference models, fully matching Cummins and other mainstream diesel engine systems.
Superb durability & sealing: Constructed with high-strength metal canister and premium rubber gaskets, it resists vibration and pressure impact in harsh working environments, with no leakage risk and long service life under rated conditions.
Wide application scope: Specialized for heavy-duty diesel equipment, it is widely used in commercial vehicles, engineering machinery, power generation and agricultural equipment, adapting to diverse working scenarios and ensuring consistent filtration performance.
Technical Specifications
| Part Number: | FS1242 |
| Filter Type: | Oil-Water Separator |
| Dimensions: | Outer Diameter≈93.04mm, Overall Height≈174.9mm |
| Connection Specs: | Thread Specification: 1-14 UNS-2B |
| Filtration Precision: | 20μm |
| Filtration Efficiency: | ≥96% (ISO 4548 Standard) |
| Applicable Models/Platforms: | Heavy-Duty Commercial Vehicles, Engineering Machinery, Power Generation Equipment |
| Operating Conditions: | Temperature: -40℃~120℃; Pressure: 0.1~1.2MPa |
| Lead Time: | 15 – 30 Working Days |
| Payment Terms: | T/T ,L/C |
| Dimensions | Connection Specs |
| Filtration Efficiency |
| FS1242 | Outer Diameter≈93.04mm, Overall Height≈174.9mm | Thread Specification: 1-14 UNS-2B | 20μm | ≥96% (ISO 4548 Standard) |
| FS19594 00MX | Outer Diameter≈77mm, Overall Height≈144.5mm | Thread Specification: 3/4″-16 Threaded Interface | 20μm | 96%(ISO 4548 Standard) |
| FS19544 00MX | Outer Diameter≈77.6mm, Overall Height≈149mm | Thread Specification: M16×1.5 Threaded Interface | 25μm | 98%(ISO 4548 Standard) |
| FS19816 00MX | Outer Diameter≈120.5mm, Overall Height≈204.5mm | Thread Specification:1″-14 UNS-2B Threaded Interface | 25μm | 98.7%(ISO 4548 Standard) |
| F189-020-AM | Outer Diameter≈93.22mm, Overall Height≈249.07mm | Thread Specification: 1-14 UNS – 2B Thread | 5μm | ≥99% (ISO 4548 Standard) |
| FS19587 00MX | Outer Diameter≈77mm, Overall Height≈155mm | Thread Specification: M20×1.5 | 5μm | ≥99.6% (ISO 4548 Standard) |
| FS1280 | Outer Diameter≈93.73mm, Overall Height≈164.85mm | Thread Specification: 13/16″-18 UNS-2B | 20μm | ≥96%(ISO 4548 Standard) |
| FS1000 | Outer Diameter≈93.22mm, Overall Height≈ 249.07mm | Thread Specification: 1-14 UNS-2B | 10μm | ≥98.7%(ISO 4548 Standard) |
| FS19732 00MX | Outer Diameter≈94.5mm, Overall Height≈201mm | Thread Specification: 1″-14 UNS-2B Threaded Interface | 25μm | 98.7% (ISO 4548 Standard) |
| FS19898 00MX | Outer Diameter≈109mm, Overall Height≈299mm | Thread Specification: 1″-14 UNF Threaded Interface | 25μm | 98.7% (ISO 4548 Standard) |
| FS19686 00MX | Outer Diameter≈93mm, Overall Height≈208mm | Thread Specification: 1″-14 UNS-2B Threaded Interface | 25μm | 98.7%(ISO 4548 Standard) |
| FS19789 00MX | Outer Diameter≈110mm, Overall Height≈265mm | Thread Specification: 1″-14 UNS-2B Threaded Interface | 25μm | 98.7% (ISO 4548 Standard) |
| F192-001 | Outer Diameter≈92mm, Overall Height≈165mm | Thread Specification: M18×1.5 | 5μm | ≥99.6%(ISO 4548 Standard) |
| FS1212 | Outer Diameter≈93.22mm, Overall Height≈201.17mm | Thread Specification: 1-14 UNS-2B | 20μm | ≥96%(ISO 4548 Standard) |
| FS19925-FGC | Outer Diameter≈81.2mm, Overall Height≈113mm | Thread Specification: M18×1.5 | 25μm | 98.7% (ISO 4548 Standard) |
| FS19594 | Outer Diameter≈76.71mm, Overall Height≈141.71mm | Thread Specification: 3/4-16 UNF-2B | 20μm | ≥96% (ISO 4548 Standard) |
| ——END—— | ||||
General Infomation of DCEC C220-10A Automotive Engine | |||
| Engine Model | C220-10A | Advertised Power | 220 HP @ 2400 RPM |
| Peak Torque | 780 N.m @ 1500 RPM | Curve&Datasheet | FR 91484 |
| Fuel System | Bosch P7100 Pump | No. Of Cylinders | 6 |
| Aspiration | Turbocharged & Air Intercooler | Displacement | 8.3 L |
| Bore * Stroke | 114 mm * 135 mm | CPL Code Revision | 8418 |
| Dry Weight | 617 kg | Wet Weight | 636 kg |
| Compression Ratio | 17.3 : 1 | ||
Installation Data of DCEC C220-10A Automotive Engine | |||
| Center of Gravity. Distance From Front Face of Block | 427 mm | ||
| Center of Gravity. Distance Above Crank Centerline(Above Crankshaft) | 163 mm | ||
| Maximum Bending Moment At Rear Face of Block | 1356 N.m | ||
| Maximum Crankshaft Thrust Bearing load limit- Intermittent load | 3558 N | ||
| Maximum Crankshaft Thrust Bearing load limit-Continuous load | 2670 N | ||
| Instantaneous Inertia At Rotating: (Without Flywheel) | N/A | ||
| Emissions Certification | GB17691/GB14761 | ||
| Idle Speed | 800 RPM | ||
| Maximum Non-Load Speed | 2720 RPM | ||
| Over Speed Performance (Within 15 Seconds) | 3500 RPM | ||
| The Clutch Torque @ 800Rpm | 495 N.m | ||
| Maximum Altitude At Which Continuous operation Is Allowed | 3000 m | ||
| Supercharger outlet Exhaust Pressure limit Value | 450 kPa | ||
| Maximum Power of Exhaust Brake | 114 kW | ||
| ——END—— | |||
Engine Performance Data Rated power of DCEC C220-10A Automotive Drive Engine | |||||
| Rated Power | Torque Peak | Rated Power | Torque Peak | ||
| Engine Speed | 2400 RPM | 1500 RPM | Exhaust Temperature | 625 ℃ | 602 ℃ |
| Oil Pressure | 345 kPa | 282 kPa | Fuel Consumption | 43 L/hr | 26.9 L/hr |
| The Air Flow | 18.9 m³/min | 9.1 m³/min | Coolant Flow | N/A | N/A |
| The Flow Rate of Pressurized Air | N/A | N/A | Heat Loss Coolant | 77 kW | 60 kW |
| Pressurized Air Pressure | N/A | N/A | Heat Loss Air | 46 kW | 14 kW |
| The Exhaust Flow | 45 m³/min | 21.3 m³/min | Mechanical Loss of Power | N/A | N/A |

System Technical Data of DCEC C220-10A Automotive Drive Engine | ||
| Air Intake System | Maximum Temperature Rise Between Ambient Air and Engine Air Inlet | 15 ℃ |
| Maximum Intake Restriction with Dry Type Air Cleaner,with Clean Filter-Medium Duty | 2.9 (300) kPa (mmH2O) | |
| Maximum Intake Restriction with Dry Type Air Cleaner,with Clean Filter-Heavy Duty | 3.7 (380) kPa (mmH2O) | |
| Maximum Intake Restriction with Dirty Filter | 6.2 (635) kPa (mmH2O) | |
| Turbocharged & Intercooled | Maximum Intake Manifold Temperature-Second Level | 55 ℃ |
| Maximum Intake Manifold Temperature-Three-Level | 50 ℃ | |
| Intercooler Cooling Temperature-Second Level | 25 ℃ | |
| Intercooler Cooling Temperature-Three-Level | 20 ℃ | |
| Maximum Allowable Pressure Difference Before and After Intercooling-Three-Level | 16.7 (125) kPa(mmHg) | |
| Minimum Inlet Pipe Diameter Allowed-Three-Level | 75 mm | |
| Exhaust System | Maximum Back Pressure Imposed by Complete Exhaust System | 10.0 (75) kPa (mmHg) |
| Exhaust Pipe Size Normally Accepable | 75 mm | |
| Maximum Static Bend Allowed for Turbocharger Exhaust Flange | N/A | |
| Lubrication System | Low oil Level Inclination Angle-Front Up | 45 ° |
| Low oil Level Inclination Angle-Back Up | 45 ° | |
| Low oil Level Inclination Angle-Fuel Pump Side Up | 45 ° | |
| Low oil Level Inclination Angle-Exhaust Side Up | 45 ° | |
| Oil Sump Capacity-Upper Limit | 14.2 L | |
| Oil Sump Capacity-Lower Limit | 12.4 L | |
| Capacity of The Whole System | 16.4 L | |
| Cooling System | Coolant Capacity – Engine only | 9 L |
| Standard Thermostat (Modulating) Range | 83 – 95 ℃ | |
| Minimum Fill Rate ( Without Low Level Alarm) | 19 L/min | |
| Minimum Coolant Expansion Space – % of System Capacity | 6 % | |
| Water Tank Capacity Without Water Expansion | 6 L | |
| Maximum Coolant Pressure (Without Pressure Cap, Thermostat Closed) | 276 kPa | |
| Maximum Degassing Time | 25 mins | |
| Maximum Coolant Flow to Accessories | 41 L/min | |
| Maximum Coolant Temperature Engine out | 100 ℃ | |
| Minimum Allows Pressure of Pressure Cap | 50 kPa | |
| Minimum Recommended Coolant Temperature | 70 ℃ | |
| Common Operating Temperature Range of Fans with Fan Clutch | 93 ℃ | |
| Maximum Coolent Temperature For Engine Protection Control | 100 ℃ | |
| The Limit Environmental Temperature at Rated Speed | Second Level 45 ℃;Three-Level 42 ℃ | |
| The Limit Environmental Temperature at Peak Torque | Second Level 40 ℃;Three-Level 37 ℃ | |
| 24V Electrical System | Maximum Allowable Resistance of Cranking Circuit | 0.002 Ω |
| The Cold Start Current When Engine and The Clutch Separate | 12 V 500 24 V 250 | |
| Cold Starting System | Maximum Unaided Cold Start Temperature | 120 RPM -10 ℃ |
| Maximum Aided Cold Start Temperature | 110 RPM -35 ℃ | |
| Fuel System | Maximum Fuel Return Resistance | 520 (mmHg) |
| Maximum Inlet Resistance of oil Pump with Clean Filter | 150 (mmHg) | |
| ——END—— | ||
Note: All Above Data are Just for Reference, All Data Might Change Without Notices or Updates, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.

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