Product Introduction
This curated selection covers all high-wear critical components for FMC M28/M2816/18 injection pumps, including valve assemblies, O-rings, bushings, stuffing boxes, plungers, packing sets, bearing rods, lubrication components, fasteners, and structural hardware. All parts comply with API 674, ASME B73, and FMC OEM quality standards, with full material traceability and performance testing to withstand high-pressure injection cycles. The assortment includes corrosion-resistant duplex stainless steel components, high-performance elastomer seals, precision-machined plungers, and heavy-duty fasteners, fully mapped to FMC OEM numbers for simplified inventory and emergency repairs.
Functional Performance Specifications
These FMC injection pump spares deliver consistent high-performance operation: valve assemblies (P525343, P525344) provide positive shutoff with zero backflow at pressures up to 15,000 PSI; precision-machined plungers (P514843) maintain smooth linear motion with minimal friction, extending seal life by up to 40%; high-density V-packing and O-rings resist chemical degradation and high-pressure extrusion, eliminating leak paths; lubrication system components ensure consistent oil delivery with 10-micron filtration to prevent contamination; and heavy-duty studs/nuts maintain structural integrity under extreme pressure cycling. All components are engineered to preserve pump efficiency within ±1.5% of OEM rated output.
Structural & Material Features
- OEM-Certified Dimensional Accuracy: Machined to ±0.0005 inch tolerance for perfect drop-in fitment, eliminating alignment errors and installation delays
- Chemical & Wear Resistant Materials: Duplex stainless steel for fluid-end components, peroxide-cured nitrile (90 durometer) for O-rings, high-grade alloy steel for plungers, and aluminum bronze for adjusting nuts to resist corrosion and abrasion
- Precision Sealing Design: Modular V-packing and wiper ring sets create multi-stage sealing barriers, preventing fluid bypass and extending service life in harsh chemical environments
- Heavy-Duty Fastening System: Full-threaded studs and heavy hex nuts conform to UNC/UN thread standards, providing consistent clamping force to withstand pump vibration and pressure surges
- Compliant Lubrication Components: 10-micron filters and dedicated lubricator pumps maintain optimal oil flow, reducing bearing wear and extending pump operational life
Applicable Operating Conditions
These spare parts are built for demanding high-pressure injection environments, optimized for chemical injection, cementing, water injection, and drilling fluid transfer applications. They perform reliably in ambient temperatures ranging from -20°F to 220°F, handling corrosive chemicals, abrasive fluids, and high-pressure cycles up to 15,000 PSI. Components are rated for both intermittent and 24/7 continuous pump operation, suitable for onshore drilling rigs, offshore platforms, and industrial injection facilities.
Maintenance & Service Recommendations
- Inspect packing sets, O-rings, and wiper rings every 500 operating hours for wear, extrusion, or chemical degradation to prevent fluid leakage
- Lubricate bearing rods and gear assemblies monthly with recommended pump oil to reduce friction and premature wear
- Replace valve assemblies and plungers at the first sign of scoring or pressure loss to maintain injection efficiency
- Check stud torque and nut tightness quarterly to prevent structural loosening under pressure cycling
- Change lubrication filters and inspect oil quality every 1,000 hours to keep the lubrication system contaminant-free
We supply the following spare parts:
| 1 | VALVE ASSEMBLY; Part Number: P525343; Manufacturer: FMC TECHNOLOGIES | EA |
| 2 | VALVE ASSEMBLY; Part Number: P525344; Manufacturer: FMC TECHNOLOGIES | EA |
| 3 | O-RING; Part Number: P500569; Manufacturer: FMC TECHNOLOGIES | EA |
| 4 | O-RING; Part Number: 3226710; Manufacturer: FMC TECHNOLOGIES | EA |
| 5 | O-RING, PUMP SIZE: 237, N507-90 FOR PUMP; Part Number: N90-237; Manufacturer: FMC TECHNOLOGIES | EA |
| 6 | THROAT, BUSHING ; Part Number: P525247; Manufacturer: FMC TECHNOLOGIES | EA |
| 7 | STUFFING BOX, M2816/18, 3.25 PACKING BORE, 3″1/2 12UN-2B THREAD, 8.0 LG, 1/8″ NPT PORT, DUPLEX SST; Part Number: P525240; Manufacturer: FMC TECHNOLOGIES | EA |
| 8 | SEAL CARRIER; Part Number: P525248; Manufacturer: FMC TECHNOLOGIES | EA |
| 9 | O-RING; Part Number: 3260324; Manufacturer: FMC TECHNOLOGIES | EA |
| 10 | WIPER RING; Part Number: P523086; Manufacturer: FMC TECHNOLOGIES | EA |
| 11 | SCREW SET (HEX SOCKET/NYLON TIPPED/3/8-16UNC-2A X 1/2 LG/SS), Part Number: 320547, Manufacturer: FMC TECHNOLOGIES | EA |
| 12 | NUT ADJUSTING (Q28/M2818/3-1/2/12UN-2A THREAD/2.38 LG/C95400/MAT: ALUMINUM BRONZE/TRACEABLE), Part Number: P525246, Manufacturer: FMC TECHNOLOGIES | EA |
| 13 | PLUNGER FOR PLUNGER PUMP M2818 ; Part Number: P514843; Manufacturer: FMC TECHNOLOGIES | EA |
| 14 | PACKING 1068 FOR PUMP; Part Number: P525236; Manufacturer: FMC TECHNOLOGIES | EA |
| 15 | V-PACKING FOR PUMP ; Part Number: P525237; Manufacturer: FMC TECHNOLOGIES | EA |
| 16 | PLUNGER ROD; Part Number: P514588; Manufacturer: FMC TECHNOLOGIES | EA |
| 17 | PLUNGER CLAMP ASSEMBLY (F/M28/2.50 DIAMETER HUB/3/4 BOLTS/SST) Part Number: P518248, Manufacturer: FMC TECHNOLOGIES | EA |
| 18 | ROD, BEARING ; Part Number: P514130; Manufacturer: FMC TECHNOLOGIES | EA |
| 19 | BEARING CONE; Part Number: P514567; Manufacturer: FMC TECHNOLOGIES | EA |
| 20 | OIL SEAL; Part Number: P514578; Manufacturer: FMC TECHNOLOGIES | EA |
| 21 | O-RING; Part Number: P514579; Manufacturer: FMC TECHNOLOGIES | EA |
| 22 | O-RING, UNIFORM NO. 367, 7.475 ID X 0.210 CS, PEROXIDE CURED NITRILE 90 DUROMETER; Part Number: P510537; Manufacturer: FMC TECHNOLOGIES | EA |
| 23 | GASKET, BACK COVER; Part Number: P514595; Manufacturer: FMC TECHNOLOGIES | EA |
| 24 | SEAL HOLDER, PONY ROD SEAL, M28/Q28, GARLOLCK MODEL 26 SEAL, 4.00 ID, ALUMINUM; Part Number: P519309; Manufacturer: FMC TECHNOLOGIES | EA |
| 25 | OIL SEAL; Part Number: P521647; Manufacturer: FMC TECHNOLOGIES | EA |
| 26 | RETAINER RING; Part Number: P522824; Manufacturer: FMC TECHNOLOGIES | EA |
| 27 | O-RING; DISCHARGE FLANGE; Part Number: N90-234; Manufacturer: FMC TECHNOLOGIES | EA |
| 28 | OIL PUMP; WITH MOTOR; Part Number: P525731; Manufacturer: FMC TECHNOLOGIES | EA |
| 29 | FILTER; 10 MICRON WITH 25 PSI BYPASS VALVE; Part Number: 3268821; Manufacturer: FMC TECHNOLOGIES | EA |
| 30 | LUBRICATOR PUMP, Part Number: P525966, Manufacturer: FMC TECHNOLOGIES | EA |
| 31 | Stuffing box clamp; Part Number: P514938, Manufacturer: FMC TECHNOLOGIES | EA |
| 32 | SHEAVE 6″OD X5/8 BORE; Part Number: 5271587, Manufacturer: FMC TECHNOLOGIES | EA |
| 33 | SHEAVE, QUICK DISCONNECT, A, 7.15 OD SINGLE GROOVE; Part Number: P522069, Manufacturer: FMC TECHNOLOGIES | EA |
| 34 | STUD; 1 3/8-8UN-2AX14.25 LONG; Part Number: P515940, Manufacturer: FMC TECHNOLOGIES | EA |
| 35 | STUD; 1 1/8-8UN-2AX5.00 LONG PER IFI 136, CONTINIUOUS THREAD; Part Number: 504-276, Manufacturer: FMC TECHNOLOGIES | EA |
| 36 | STUD; 1 -8UNC-2AX5.25 LONG, CONTINUOUS THREAD; Part Number: P524053, Manufacturer: FMC TECHNOLOGIES | EA |
| 37 | STUD; 3/4-10UNC-2A X 4.00; Part Number: 504-338, Manufacturer: FMC TECHNOLOGIES | EA |
| 38 | STUD; 1/2-13UNC-2AX3.00 LONG SST LOCK NUT; Part Number: 3267723, Manufacturer: FMC TECHNOLOGIES | EA |
| 39 | LOCK NUT; 1 3/8-8UN-2B, HEAVY HEX; Part Number: P516081, Manufacturer: FMC TECHNOLOGIES | EA |
| 40 | HEAVY HEX NUT; 1 1/8-8UN-2B; Part Number: 504-208, Manufacturer: FMC TECHNOLOGIES | EA |
| 41 | HEAVY HEX NUT; 7/8-9UNC-2B; Part Number: 3226634, Manufacturer: FMC TECHNOLOGIES | EA |
| 42 | HEAVY HEX NUT, 1-8UNC-2B; Part Number: L504-196, Manufacturer: FMC TECHNOLOGIES | EA |
| 43 | NUT; HEAVY HEX, 1/2-13UNC-2B; Part Number: P525226, Manufacturer: FMC TECHNOLOGIES | EA |
| 44 | LOCKING TYPE WASHER; 1 1/8 NOMINAL SIZE; Part Number: P501268, Manufacturer: FMC TECHNOLOGIES | EA |
| 45 | LOCKING TYPE WASHER; 3/4 NOMINAL SIZE; Part Number: 1100248, Manufacturer: FMC TECHNOLOGIES | EA |
| 46 | LOCKING TYPE WASHER; 1/2 NOMINAL SIZE; Part Number: 1100245, Manufacturer: FMC TECHNOLOGIES | EA |
| 47 | HEAVY HEX NUT; 3/4-10UNC-2B; Part Number: 504-086, Manufacturer: FMC TECHNOLOGIES | EA |
| 48 | TUBING; RD, SEAMLESS, 1/4 OD 0.35WALL, 304 STAINLESS STEEL (mt); Part Number: 3263720, Manufacturer: FMC TECHNOLOGIES | M |
Field Failure Repair Case Studies
Case 1: M2818 Injection Pump Seal Leakage
An FMC M2818 injection pump experienced severe fluid leakage from the stuffing box due to worn V-packing (P525237). Replacing the degraded packing set with an OEM-spec V-packing restored leak-free sealing, bringing injection pressure back to full rated capacity and eliminating costly fluid waste.
Case 2: Plunger Wear Causing Pressure Loss
A drilling injection pump suffered consistent pressure drop due to a scored plunger (P514843). Installing a new precision-machined OEM plunger eliminated internal fluid bypass, restored full injection pressure, and extended the service life of surrounding sealing components.
Case 3: Valve Assembly Failure & Backflow
Unplanned backflow occurred in an FMC injection pump due to a faulty valve assembly (P525343). Swapping the defective valve with an OEM replacement assembly restored positive shutoff, eliminated backflow, and resumed uninterrupted injection operations.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible with both FMC M28 and M2816/18 pumps? | Yes, this parts list includes OEM-matched components for both M28 and M2816/18 series plunger injection pumps, with direct fitment for all listed OEM part numbers. |
| Do these seals resist chemical degradation in harsh injection fluids? | Absolutely, all O-rings and packing use peroxide-cured nitrile and high-grade elastomers, engineered to resist corrosion and wear from common drilling and injection chemicals. |
| What pressure rating do these valve assemblies support? | The OEM valve assemblies (P525343, P525344) are rated for reliable operation at high pressures up to 15,000 PSI, matching FMC’s original pump design specifications. |
Procurement Guidance & Closing Value Statement
This FMC injection pump spare parts list serves as both a formal procurement benchmark and a technical troubleshooting reference, designed to minimize costly pump downtime, reduce long-term maintenance expenses, and uphold the pressure integrity and operational reliability of your injection systems. Each part is a verified OEM-grade component that eliminates the risks of substandard aftermarket parts, ensures compliance with API and FMC performance standards, and delivers consistent durability under extreme high-pressure operating conditions.
Whether you need to replace worn seals, faulty valve assemblies, damaged plungers, degraded packing, or heavy-duty fasteners to restore your FMC M28/M2816/18 pump, or stock critical spares for routine maintenance and emergency repairs, this catalog provides the exact parts, quantities, and OEM specifications your operation demands. Secure your supply of authentic FMC injection pump spare parts today to protect your equipment investment, maintain uninterrupted fluid injection workflows, and keep your drilling and production operations running efficiently and reliably.
