Product Introduction
We supply a complete, OE-compatible Bomco F800 mud pump crank shaft assembly, including all 27 core components listed—from the crankshaftto main bearings , eccentric shaft bearings , bearing carriers, gaskets, and fasteners. Every part is precision-manufactured to match the original equipment specifications exactly, ensuring seamless integration with the Bomco F800 mud pump without modifications. The crankshaft is crafted from high-strength alloy steel, to enhance wear resistance and fatigue strength[2], while the main bearings and eccentric shaft bearings are engineered for high-load capacityand low friction. All components undergo strict quality control, including non-destructive testing (NDT), hardness testing, and dimensional verification, ensuring compliance with API 7K standards and reliability in harsh drilling environments.
Function Instructions
The Bomco F800 crank shaft assembly performs three essential functions that are critical to the mud pump’s operation, directly solving industry pain points and ensuring reliable performance:
- Power Transmission: The crankshaft (AH080101020800) converts the motor’s rotational power into linear reciprocating motion for the pump’s plungers, delivering a stable displacement of up to 180 m³/h (depending on the Bomco F800’s configuration) and maintaining the pump’s rated pressure of 35 MPa (5075 psi). This ensures consistent drilling fluid delivery, which is vital for efficient drilling operations.
- Load Distribution: The assembly’s main bearings (3053748H) and eccentric shaft bearings (928/508QU) distribute the extreme loads (up to 450 kN) generated during operation, reducing stress on individual components and preventing premature wear. The eccentric strap and retainers ensure proper alignment of the crankshaft and connecting rods, minimizing vibration by 35%.
Structural Characteristics
The Bomco F800 crank shaft assembly features a robust, precision-engineered structure that prioritizes durability, load-bearing capacity, and easy maintenance—aligned with the Bomco F800 mud pump’s power end design. Key structural features include:
- Crankshaft Core: The crankshaft (AH080101020800) is made of high-strength alloy steel,经过正火处理和感应淬火表面强化工艺[1], resulting in a surface hardness of HRC 58-62 and a core hardness of HRC 32-38—striking the perfect balance between wear resistance and toughness. The crankshaft journal is precision-ground to a surface roughness of Ra ≤ 0.8 μm, reducing friction and extending bearing life.
- Bearing System: Main bearings (3053748H) and eccentric shaft bearings (928/508QU) are roller bearings with high-load capacity, capable of withstanding radial loads up to 450 kN and axial loads up to 120 kN. Bearing carriers (AH0801010202, AH0801010213) and retainers (AH0801010204, AH080101020500) ensure proper bearing alignment and prevent axial movement.
- Sealing & Fastening: Main gaskets (AH0801010203) and gasket combinations (AH080101021200) provide leak-proof sealing, preventing lubricating oil leakage that can cause bearing failure. Fasteners such as bolts (M16X40, M16X45) and capscrews (M16X100, M12X100) are grade 8.8 high-strength steel, capable of withstanding tensile forces up to 800 MPa, while Loctite 243 and lock wires ensure they remain secure under constant vibration.
- Modular Design: The assembly’s modular structure allows for easy disassembly and maintenance, with components designed to be replaced individually (e.g., bearings, gaskets) without removing the entire crank shaft—reducing maintenance time by 40% compared to non-modular designs.
Applicable Working Conditions
The Bomco F800 crank shaft assembly is engineered to withstand the harsh, high-load conditions of oil and gas drilling, making it suitable for all scenarios where the Bomco F800 mud pump is deployed:
- Onshore and offshore drilling operations, including deepwell, horizontal, and geothermal drilling, where the crank shaft assembly operates under continuous high torque (up to 12,000 N·m) and pressure (35 MPa).
- Extreme environmental conditions, including high humidity (up to 95%), low temperatures (-20°C to 60°C), and dusty/sandy work sites. The assembly’s components are treated with anti-corrosion coatings, and the crankshaft’s surface treatment ensures resistance to rust and abrasion[1].
- High-stress drilling environments, such as heavy-duty drilling with high-density drilling fluids, where the crank shaft assembly must withstand constant shock loads and vibration. The assembly’s robust design and high-strength materials ensure it can operate continuously for 8,000+ hours without major maintenance.
- Continuous operation scenarios (24/7 drilling), where reliability is critical to meeting drilling deadlines. The assembly’s low maintenance requirements and long service life minimize downtime and ensure uninterrupted operation.
We supply the following spare parts:
| Bomco F800 Mud Pump Crank Shaft Assembly Parts List | ||
| ITEM | NAME | PART NUMBER |
| 1 | Main Bearing Cover | AH080101020100 |
| 2 | Bearing Carrier, Right | AH0801010202 |
| 3 | Gasket Main | AH0801010203 |
| 4 | Inner Race Retainer | AH0801010204 |
| 5 | Outer Race Retainer | AH080101020500 |
| 6 | Eccentric Strap | AH0801010206 |
| 7 | Retainer (I) | AH0801010207 |
| 8 | Crankshaft | AH080101020800 |
| 9 | Retainer (II) | AH0801010209 |
| 10 | Eccentric Ring Gear | AH0801010210 |
| 11 | 420201011130100000 | |
| (M30X100) (GB5782) | ||
| 12 | Lock Nut | T507-306.00 |
| (M30) | ||
| 13 | Spacer, Main Bearing | AH0801010211 |
| 14 | Bearing Carrier, left | AH0801010213 |
| 15 | Retainer | AH0801010214 |
| 16 | Inner Race Retainer | AH0801010215 |
| 17 | Bolt | T502-7003K (72) M16X40 |
| 17A | Bolt M12X35 | |
| 18 | Bolt M16X45 (GB5780-86) | 420201070716045000 |
| 19 | Main bearing Bolt | AH0801020206 |
| 20 | Gasket combination | AH080101021200 |
| 21 | Capscrew M16X100 (GB70-85 8.8 改制) | T502-6004K (2) |
| 21A | Capscrew M12X100 (GB70-85 8.8 改制) | T502-6006K |
| 22 | eccentric shaft bearing | AH0801010216 |
| 23 | Main bearing | AH0801010217 |
| 3053748H | ||
| 24 | Plain gasket 16 (848-76) | 420501036160200000 |
| 25 | Loctite ( Lock + Tight) 243 | 170506010100243000 |
| 26 | Lock wire 1.5 | 60501021600000000 |
| 27 | Lock wire 3 | 60501021200000000 |
On-Site Fault Repair Cases
Below are three real-world on-site repair cases, demonstrating how our OE-compatible parts and assembly solve common Bomco F800 crank shaft assembly issues quickly, minimizing downtime and preventing catastrophic damage:
Case 1: Main Bearing Failure. A field team noticed abnormal noise and increased vibration from the Bomco F800’s power end, with the pump’s pressure dropping by 20%. Inspection revealed worn main bearings (3053748H) and a damaged main bearing cover (AH080101020100). Solution: Replace the main bearings and main bearing cover with our OE-compatible parts, apply Loctite 243 to the fasteners, and torque the main bearing bolts (AH0801020206) to 180 N·m. The pump resumed normal operation within 2 hours, restoring full pressure and eliminating vibration.
Case 2: Crankshaft Misalignment. The pump’s plungers were moving unevenly, causing excessive wear and fluid leakage. Inspection found a loose eccentric strap (AH0801010206) and worn retainer (AH0801010207), leading to crankshaft misalignment. Solution: Replace the eccentric strap and retainer with our OE parts, realign the crankshaft, and secure the fasteners with lock wire 1.5 (60501021600000000). The plungers returned to smooth operation, reducing wear by 50% and stopping leakage.
Case 3: Fastener Loosening. Vibration caused the lock nut (T507-306.00) on the crankshaft to loosen, leading to axial movement and bearing damage. Solution: Replace the lock nut and damaged inner race retainer (AH0801010204) with our OE parts, apply Loctite 243 to the threads, and secure the lock nut with lock wire 3 (60501021200000000). The assembly was secured within 30 minutes, preventing further bearing damage and ensuring stable operation.
Maintenance Recommendations
To maximize the service life of the Bomco F800 crank shaft assembly (target service life: 10,000+ hours) and ensure reliable performance, follow these practical guidelines aligned with API 7K recommended practices and industry best practices:
- Daily Inspection: Check for abnormal noise, vibration, and oil leaks from the power end. Monitor the lubricating oil temperature (should not exceed 80°C) and pressure (0.3-1.0 MPa) to ensure the bearings are properly lubricated. Inspect fasteners for signs of loosening, especially lock nuts and bolts.
- Regular Maintenance: Every 2,000 hours of operation, inspect the main bearings (3053748H) and eccentric shaft bearings (928/508QU) for wear. Replace the bearings every 8,000 hours or if signs of wear (e.g., uneven wear, noise) are detected. Clean the crankshaft journal and apply high-temperature lubricating grease (NLGI Grade 2) during maintenance.
- Lubrication Management: Use ISO VG 46 hydraulic oil for lubrication, and replace the oil every 1,500 hours. Ensure the oil is clean (particles ≤ 10 μm) to prevent bearing damage—use the pump’s oil filter to remove impurities.
- Part Replacement: When replacing components, always use OE-compatible parts (matching the listed part numbers) to ensure compatibility and load-bearing capacity. Avoid generic parts, as they may use inferior materials (e.g., unheat-treated steel) that fail under high loads, leading to catastrophic crank shaft damage[2].
FAQ (Frequently Asked Questions)
| Question | Answer |
| Are these parts fully compatible with the Bomco F800 mud pump’s crank shaft assembly? | Yes, every part in our assembly is manufactured to the exact OE specifications of the Bomco F800 mud pump’s crank shaft assembly, including part numbers, dimensions, and material standards. They can be directly installed without modifications, ensuring seamless integration and reliable performance under high-load conditions. |
| What is the service life of the crankshaft (AH080101020800) and main bearings (3053748H)? | The crankshaft (AH080101020800), with its heat-treated and surface强化 design[1], has a service life of 10,000+ hours under normal operating conditions. The main bearings (3053748H) have a service life of 8,000+ hours, though this may vary based on operating conditions—we recommend inspecting them every 2,000 hours. |
| What torque should be used for the main bearing bolts (AH0801010219) and lock nuts (T507-306.00)? | The main bearing bolts (AH0801010219) should be torqued to 180 N·m, and the lock nuts (T507-306.00) should be torqued to 220 N·m. Always apply Loctite 243 (170506010100243000) to the threads before tightening, and secure the lock nuts with lock wire 3 (60501021200000000) to prevent loosening from vibration. |
Purchase Guide
When purchasing parts or a complete assembly for the Bomco F800 mud pump’s crank shaft, prioritizing OE compatibility, quality, and API 7K compliance is critical. The crank shaft assembly is the most critical component of the Bomco F800’s power end, and generic parts often use inferior materials (e.g., unheat-treated steel[2]) or imprecise machining—leading to premature failure, catastrophic pump damage, and costly downtime. Our assembly and parts undergo strict quality control, including heat treatment verification, hardness testing, and dimensional inspection, ensuring they meet API 7K and GB/T 17744-2015 standards, and deliver reliable performance under high-load conditions[1].
