Product Introduction

Our FMC AL 1122BCD spare parts collection features OEM-equivalent precision components manufactured from high-grade alloy steel, heat-treated ductile iron, and industrial-grade elastomers, engineered to match the exact tolerances, load ratings, and performance metrics of original factory parts. Every part is laser-inspected for dimensional accuracy (±0.001 inch tolerance) and pressure-tested to withstand the pump’s 6,000 lbs frame load rating, ensuring seamless integration and zero compatibility issues. This comprehensive parts list covers all high-wear power end components (crankshaft, connecting rods, bearings) and fluid end sealing components (piston cups, O-rings, gaskets) to support full pump overhauls, routine preventive maintenance, and on-site emergency repairs.

Key Functional Specifications

• Power End Performance: Crankshaft and pinion shaft assemblies maintain 3.6:1 internal gear rotation ratio, preserving consistent torque transfer and reducing shaft deflection under heavy loads
• Sealing System Reliability: High-performance elastomer seals and gaskets resist abrasion, chemical degradation, and thermal fatigue, with a service life 20% longer than standard aftermarket seals in 140°F maximum fluid temperature environments
• Wear Resistance: Hardened wrist pins, crosshead assemblies, and rod bearings feature case-hardened surfaces (58-62 HRC hardness) to minimize friction wear and extend maintenance intervals
• Compatibility: Direct OEM replacement fit for AL 1122BCD triplex mud pumps, no modifications or machining required for installation

Structural Design Advantages

• Modular Power End Components: One-piece connecting rod assemblies and reinforced crosshead designs distribute load evenly across the pump frame, eliminating stress fractures and extending component lifespan
• Precision Bearing Assemblies: Matched bearing cones and cups for crankshaft and pinion shafts reduce radial play, ensuring smooth rotation and minimizing noise/vibration during operation
• Leak-Proof Sealing Architecture: Multi-layer piston rod oil seals and retainer gaskets create a barrier against drilling fluid intrusion, protecting internal bearings and gear assemblies from contamination
• Shim & Gasket Precision: Custom-machined bearing housing shims and gaskets ensure perfect flange alignment, preventing oil leaks and maintaining proper lubrication pressure

Recommended Operating Conditions

These spare parts are optimized for the full operating envelope of the FMC AL 1122BCD pump, performing reliably in the following field conditions:

• Fluid temperature range: 0°F to 140°F (-20°C to 60°C)
• Operating speed: 360 RPM (minimum) to 1,275 RPM (intermittent maximum)
• Drilling media: Abrasive drilling mud, slurry, and high-solid-content fluids
• Environment: Offshore drilling platforms, onshore oilfields, underground mining operations, and remote HDD job sites
• Lubrication compatibility: SAE 30 weight oil (1-gallon reservoir capacity, splash lubrication system)

Maintenance & Service Best Practices

To maximize part lifespan and prevent costly breakdowns, follow these field-proven maintenance protocols tailored to the AL 1122BCD pump:

1. Preventive Inspection Schedule: Inspect rod bearings, wrist pins, and piston rod seals every 500 operating hours; replace high-wear components (piston cups, O-rings) every 1,000 hours to avoid catastrophic failure
2. Lubrication Management: Maintain proper oil levels in the power end reservoir and lubricate crosshead assemblies monthly to reduce friction; use only SAE 30 oil to preserve seal integrity
3. Torque Specifications: Follow OEM torque guidelines when installing bearing housings, back covers, and pinion assemblies to avoid over-tightening and component warping
4. Seal Replacement Protocol: Replace all piston rod seals and retainer gaskets simultaneously during overhauls to ensure uniform sealing pressure and prevent premature leaks
5. Wear Monitoring: Track crosshead assembly and crankshaft bearing wear; replace components at the first sign of excessive play or surface scoring to avoid secondary damage

We supply the following spare parts:

FMC Pump AL 1122BCD parts list

NO	Description of Spares
1	Crankshaft, part No: PPFMC 1285094
2	Pinion Shaft, Part No: PPFMC P511596
3	Connectin Rod Assembly, Part No: PPFMC 5266814
4	Rod Bearing, Part No: PPFMC P514965
5	Wrist Pin, Part No: PPFMC A91014
6	Crosshead Assembly, Part No: PPFMC 1252939
7	Oil Seal, Piston Rod, Part No: PPFMC 1177489
8	Gsket, Seal Retainer, Part No: PPFMC  3268418
9	Shim, Bearing Housing, Part No: PPFMC  1252595
10	Gsket, Bearing Housing, Part No: PPFMC A91675
11	Gsket, Back Cover, Part No: PPFMC P508966
12	Oil Seal, Rotating, Part No: PPFMC 5257339
13	Gasket, Pinion, Part No.: PPFMC A91674
14	Bearing Cone, Crank Part No:.PPFMC 1177473
15	Bearing cup, crank Part No: PPFMC 1177474
16	Bearing, Pinion Part No: PPFMC P511746
17	Kay, Part No: PPFMC  1104349
18	O-Ring, Part No: PPFMC  3226710
19	Cylinder, Part No: PPFMC 1267586
20	Piston Cup, Part No: PPFMC A268N
21	O-Ring, Rod seal, Part No: PPFMC  1101176
22	O-Ring, Valve Cover, Part No: PPFMC  1181154

Field Troubleshooting: Real-World Repair Cases

Case 1: Crankshaft Bearing Oil Leak & Excessive Vibration

A drilling crew reported persistent oil leaks from the bearing housing and severe pump vibration after 800 hours of operation. Inspection revealed worn crankshaft bearing cones/cups and damaged bearing housing gaskets. Replacing the PPFMC 1177473 bearing cone, PPFMC 1177474 bearing cup, and PPFMC A91675 gasket eliminated leaks, reduced vibration by 70%, and restored factory rotation smoothness.

Case 2: Piston Rod Seal Failure & Fluid Contamination

An HDD contractor experienced drilling mud intrusion into the power end, causing gear and bearing wear. The root cause was degraded PPFMC 1177489 piston rod oil seals. Replacing all 27 piston rod seals and matching retainer gaskets created a tight fluid barrier, preventing cross-contamination and extending power end component life by 1,500+ operating hours.

Case 3: Connecting Rod Bearing Wear & Loss of Pump Pressure

A mining operation noticed a 30% drop in pump pressure and unusual knocking noises from the power end. Assessment showed worn PPFMC P514965 rod bearings and loose wrist pins. Swapping all 9 rod bearings and 9 wrist pins restored full pressure capacity, eliminated knocking, and prevented costly connecting rod assembly replacement.

Frequently Asked Questions (FAQ)

Question	Answer
Are these parts 100% compatible with the FMC AL 1122BCD pump only?	Yes, every part in this list is precision-engineered exclusively for the FMC Triplex Mud Pump AL 1122BCD, with exact OEM dimensional tolerances and load ratings for direct drop-in replacement; not recommended for other pump models.
What is the expected service life of these spare parts in harsh drilling conditions?	Under normal operating conditions (360-900 RPM continuous duty), high-wear seals/gaskets last 1,000-1,500 hours, while structural components (crankshaft, crossheads) deliver 5,000+ hours of service with proper lubrication.
Can I purchase individual parts instead of the full set, and are part numbers traceable?	Yes, individual parts are available for purchase using the listed PPFMC part numbers; all parts are traceable to OEM specifications and tested to meet API 7K quality standards for drilling equipment.

Procurement Guidance & Value Proposition

Investing in these genuine-equivalent FMC AL 1122BCD spare parts ensures your triplex mud pump operates at peak efficiency, minimizes unplanned downtime, and reduces long-term maintenance costs for drilling and fluid handling operations. Each component is engineered to resolve critical field pain points, from seal leaks and bearing wear to pressure loss, providing both a reliable purchasing standard for inventory planning and a definitive technical repair standard for on-site maintenance teams.

Whether you are stocking inventory for routine preventive maintenance, preparing for emergency overhauls, or replacing failed components to get equipment back online, this parts list offers the precision, durability, and compatibility needed to keep your FMC AL 1122BCD pump operating reliably in the toughest field conditions. Secure your spare parts supply today to maintain operational continuity, protect your equipment investment, and avoid costly delays in critical drilling projects.