Product Introduction
This full FMC frac pump parts lineup includes all critical components for complete equipment maintenance: high-precision adjusting nuts, 10-micron bypass oil filters, full motor seal kits, back cover gaskets, heavy hex nuts of all standard thread sizes, locking washers, high-pressure O-rings, oil filter elements, motorized oil pumps, industrial oil seals, pump packing sets, seal carriers, quick-disconnect sheaves, full-size threaded studs, duplex stainless steel stuffing boxes, stuffing box clamps, throat bushings, 304 stainless steel seamless tubing, V-packing sets, wiper rings and high-wear plungers.
Core Functional Specifications
Every component is engineered to withstand extreme high-pressure fracturing operating conditions, with verified performance metrics to ensure field reliability:
- High-Pressure Sealing Performance: All O-rings, gaskets, V-packing and oil seals maintain zero leakage at operating pressures up to 15,000 PSI, resistant to fracturing fluid corrosion, oil degradation and extreme temperature cycling.
- Fastener Strength & Stability: Heavy hex nuts and fully threaded studs meet strict industrial fastener standards, with anti-loosening properties under continuous high-vibration operation, no stretching or stripping under full-load pressure.
- Lubrication System Efficiency: 10-micron oil filters with 25 PSI bypass valves protect critical hydraulic and lubrication systems, removing abrasive contaminants and extending oil and component life.
- Wear Resistance: Plungers, throat bushings and wiper rings feature ultra-hard surface treatments, with service life exceeding 3,500 operating hours in high-abrasion fracturing fluid conditions.
- Material Durability: Corrosion-resistant alloys and stainless steel components withstand harsh oilfield chemicals, saltwater exposure and seasonal temperature changes without degradation.
Structural Design Features
These FMC frac pump parts are optimized for high-pressure durability, easy field maintenance and reliable long-term performance:
- Precision Thread Design: All nuts and studs feature precision-machined UNC/UN threads, ensuring tight, stable fit and easy installation/removal without thread damage.
- Modular Seal & Packing Design: Pre-configured seal kits and V-packing sets enable quick replacement, reducing disassembly time and eliminating improper installation errors.
- Anti-Vibration Locking Design: Locking washers and heavy-duty fasteners prevent loosening under continuous fracturing vibration, maintaining consistent clamping force.
- Corrosion-Resistant Material Construction: Marine-grade and oilfield-specific materials resist rust, chemical corrosion and wear in harsh field environments.
- Perfect OEM Interface Fit: All components match original FMC pump dimensions, ensuring seamless installation and full compatibility with existing pump assemblies.
Maintenance & Service Recommendations
To maximize frac pump uptime, extend component life and ensure safe high-pressure operation, follow these industry-standard maintenance protocols:
- Pre-Operation Inspection: Check all fasteners for tightness, inspect seals and packing for visible wear, verify oil filter pressure and lubrication system flow before each operation.
- Routine Maintenance (Every 500 Operating Hours): Replace oil filter elements, inspect O-rings and gaskets for deterioration, retighten all high-strength studs and nuts to specified torque values.
- Preventive Overhaul (Every 2,000 Operating Hours): Replace V-packing, wiper rings and oil seals, inspect plungers and throat bushings for wear, clean lubrication tubing and unclog all ports.
- Emergency Repair Protocol: Use only matched OEM-spec parts for leak repair, avoid mixing thread sizes or material grades, and verify torque values for all reassembled fasteners.
- Storage Guidelines: Store spare seals, gaskets and rubber components in a cool, dry, dark environment to prevent premature aging; apply anti-corrosion coating to metal fasteners during long-term storage.
- We supply the following spare parts:
| 1 | NUT ADJUSTING (Q28/M2818/3-1/2/12UN-2A THREAD/2.38 LG/C95400/MAT: ALUMINUM BRONZE/TRACEABLE), Part Number: P525246, Manufacturer: CROSBY |
| 2 | FILTER; 10 MICRON WITH 25 PSI BYPASS VALVE; Part Number: 3268821; Manufacturer: FMC TECHNOLOGIES |
| 3 | FULL SEAL KIT FOR FMC HYDRAULIC SMA ROTARY POWER RADIAL PISTON MOTOR TYPE, MODEL: SMA 3500 C1-154; Part Number:SMA3500C1154FSK; Manufacturer:MOYNO |
| 4 | GASKET, BACK COVER; Part Number: P514595; Manufacturer: FMC TECHNOLOGIES |
| 5 | HEAVY HEX NUT, 1-8UNC-2B; PART NUMBER: L504-196; MANUFACTURER: FMC TECHNOLOGIES |
| 6 | HEAVY HEX NUT; 1 1/8-8UN-2B; PART NUMBER: 504-208; MANUFACTURER: FMC TECHNOLOGIES |
| 7 | HEAVY HEX NUT; 3/4-10UNC-2B; PART NUMBER: 504-086; MANUFACTURER: FMC TECHNOLOGIES |
| 8 | HEAVY HEX NUT; 7/8-9UNC-2B; PART NUMBER: 3226634; MANUFACTURER: FMC TECHNOLOGIES |
| 9 | LOCK NUT; 1 3/8-8UN-2B, HEAVY HEX; PART NUMBER: P516081; MANUFACTURER: FMC TECHNOLOGIES |
| 10 | LOCKING TYPE WASHER; 1 1/8 NOMINAL SIZE; PART NUMBER: P501268; MANUFACTURER: FMC TECHNOLOGIES |
| 11 | LOCKING TYPE WASHER; 1/2 NOMINAL SIZE; PART NUMBER: 1100245; MANUFACTURER: FMC TECHNOLOGIES |
| 12 | LOCKING TYPE WASHER; 3/4 NOMINAL SIZE; PART NUMBER: 1100248; MANUFACTURER: FMC TECHNOLOGIES |
| 13 | NUT; HEAVY HEX, 1/2-13UNC-2B; PART NUMBER: P525226; MANUFACTURER: FMC TECHNOLOGIES |
| 14 | O-RING; Part Number: 3226710; Manufacturer: FMC TECHNOLOGIES |
| 15 | O-RING; Part Number: P500569; Manufacturer: FMC TECHNOLOGIES |
| 16 | O-RING; Part Number: 3260324; Manufacturer: FMC TECHNOLOGIES |
| 17 | O-RING; Part Number: P500569; Manufacturer: FMC TECHNOLOGIES |
| 18 | O-RING; Part Number: 3226710; Manufacturer: FMC TECHNOLOGIES |
| 19 | O-RING; DISCHARGE FLANGE; Part Number: N90-234; Manufacturer: FMC TECHNOLOGIES |
| 20 | O-RING, PUMP SIZE: 237, N507-90 FOR PUMP; Part Number: N90-237; Manufacturer: FMC TECHNOLOGIES |
| 21 | FILTER OIL ELEMENT; Part Number: 3268822 FMC; Manufacturer: YANCHENG CITY XINDE PETROLEUM MACHINERY PLANT, CHINA |
| 22 | OIL PUMP; WITH MOTOR; Part Number: P525731; Manufacturer: FMC TECHNOLOGIES |
| 23 | OIL SEAL; Part Number: P521647; Manufacturer: FMC TECHNOLOGIES |
| 24 | OIL SEAL; Part Number: P514578; Manufacturer: FMC TECHNOLOGIES |
| 25 | PACKING 1068 FOR PUMP; Part Number: P525236; Manufacturer: FMC TECHNOLOGIES |
| 26 | SEAL CARRIER; Part Number: P525248; Manufacturer: NFMC TECHNOLOGIES |
| 27 | SEAL CARRIER; Part Number: P525248; Manufacturer: FMC TECHNOLOGIES |
| 28 | SHEAVE , QUICK DISCONNECT, A, 7.15 OD SINGLE GROOVE; PART NUMBER: P522069; MANUFACTURER: FMC TECHNOLOGIES |
| 29 | SHEAVE 6″OD X5/8 BORE; PART NUMBER: 5271587; MANUFACTURER: FMC TECHNOLOGIES |
| 30 | STUD; 1 -8UNC-2AX5.25 LONG, CONTINUOUS THREAD; PART NUMBER: P524053; MANUFACTURER: FMC TECHNOLOGIES |
| 31 | STUD; 1 1/8-8UN-2AX5.00 LONG PER IFI 136, CONTINIUOUS THREAD; PART NUMBER: 504-276; MANUFACTURER: FMC TECHNOLOGIES |
| 32 | STUD; 1 3/8-8UN-2AX14.25 LONG; PART NUMBER: P515940; MANUFACTURER: FMC TECHNOLOGIES |
| 33 | STUD; 1/2-13UNC-2AX3.00 LONG SST LOCK NUT; PART NUMBER: 3267723; MANUFACTURER: FMC TECHNOLOGIES |
| 34 | STUD; 3/4-10UNC-2A X 4.00; PART NUMBER: 504-338; MANUFACTURER: FMC TECHNOLOGIES |
| 35 | 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 |
| 36 | STUFFING BOX CLAMP; PART NUMBER: P514938; MANUFACTURER: FMC TECHNOLOGIES |
| 37 | THROAT, BUSHING ; Part Number: P525247; Manufacturer: FMC TECHNOLOGIES |
| 38 | THROAT, BUSHING ; Part Number: P525247; Manufacturer: FMC TECHNOLOGIES |
| 39 | TUBING ; RD, SEAMLESS, 1/4 OD 0.35WALL, 304 STAINLESS STEEL ; PART NUMBER: 3263720; MANUFACTURER: FMC TECHNOLOGIES |
| 40 | V-PACKING FOR PUMP ; Part Number: P525237; Manufacturer: FMC TECHNOLOGIES |
| 41 | WIPER RING; Part Number: P523086; Manufacturer: FMC TECHNOLOGIES |
| 42 | PLUNGER FOR PLUNGER PUMP M2818 ; Part Number: P514843; Manufacturer: FMC TECHNOLOGIES |
On-Site Fault Repair Case Studies
Case 1: High-Pressure Packing Failure Causing Fracturing Fluid Leakage
A land fracturing crew experienced severe high-pressure fluid leakage at the pump plunger assembly, halting operations. Inspection revealed worn 1068 packing and V-packing due to continuous abrasive fluid erosion. Technicians replaced the damaged packing sets (P525236, P525237) and wiper rings (P523086), reassembled the stuffing box, and restored full pressure integrity with zero leakage, resuming fracturing operations quickly.
Case 2: Clogged Oil Filter Leading to Lubrication Failure
A frac pump suffered abnormal noise and overheating in the hydraulic system, caused by a clogged 10-micron oil filter that blocked lubrication flow. Maintenance teams replaced the oil filter element (3268822) and full filter assembly (3268821), flushed the lubrication system, and replaced degraded oil, eliminating overheating and restoring smooth pump operation.
Case 3: Loose High-Strength Studs Triggering Flange Leakage
During a long-duration fracturing job, a pump developed flange leakage due to vibration-induced loose studs. Long-term continuous operation caused multiple 1-8UNC-2A studs (P524053) and matching heavy hex nuts to lose clamping force. Crews retightened all fasteners to specified torque, replaced worn locking washers (P501268), and resolved the leakage fault without further downtime.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts fully interchangeable with original FMC frac pump components? | Yes, all parts in this catalog match OEM dimensions, thread specifications and material standards, offering 100% interchangeability with genuine FMC parts for all compatible frac pump and motor models, no on-site modification needed. |
| What is the recommended replacement cycle for high-wear seals and packing? | In standard fracturing operations, replace V-packing, O-rings and oil seals every 2,000-2,500 operating hours; in high-abrasion, high-pressure continuous operation, shorten the cycle to 1,500-2,000 hours to prevent sudden leakage. |
| What torque specifications should be used for FMC frac pump studs and nuts? | Follow OEM torque values: 1/2-13UNC studs at 45-50 ft-lbs, 3/4-10UNC studs at 180-200 ft-lbs, 1-8UNC studs at 380-400 ft-lbs, and 1 3/8-8UN studs at 850-900 ft-lbs, using a calibrated torque wrench for uniform tightening. |
Procurement Guidance
This FMC frac pump parts list serves as a definitive, reliable reference for oilfield equipment managers, maintenance supervisors and procurement teams, providing a complete sourcing solution for routine maintenance, emergency repairs and full-scale pump overhauls. Using these OEM-spec and high-quality compatible parts eliminates the risks of poor fit, subpar material quality and premature failure associated with non-standard parts, ensuring consistent high-pressure performance and minimizing unplanned downtime on critical fracturing jobs.
