Product Introduction
Our CSF-800 crankshaft assembly parts are premium OEM-equivalent components built to withstand extreme torsional stress, rotational fatigue, and harsh drilling conditions. The portfolio includes a forged alloy steel crankshaft, left/right bearing carriers, precision inner/outer race retainers, eccentric straps and ring gears, high-tensile UNC cap screws, bearing shims, and specialized sealing hardware. Crafted from heat-treated forged steel, wear-resistant cast iron, and high-strength fasteners, all parts meet strict API 7K standards for drilling pump power transmission systems, making them the trusted choice for crankshaft repairs, full assembly rebuilds, and preventive maintenance.
Functional Specifications
- High-Torque Power Transmission: The forged crankshaft and eccentric gear assembly efficiently transfers rotational torque, handling up to 95,000 lbs of torsional load without bending or fatigue, ensuring consistent pumping stroke and pressure output.
- Precision Bearing Retention: Dual inner and outer race retainers lock bearings in perfect radial alignment, eliminating lateral movement and reducing premature bearing wear by 36% during continuous high-vibration operation.
- Vibration-Resistant Fastening: Grade 5/8” high-tensile cap screws and locking nuts maintain consistent clamp load, preventing fastener loosening and crankshaft misalignment under prolonged drilling stress.
- Custom Alignment Tuning: Precision shim sets and main bearing spacers allow micro-adjustment of bearing clearance and crankshaft runout, ensuring optimal rotational balance and extended component lifespan.
- Leak-Free Lubrication Sealing: OEM-spec gaskets and combination packing washers create tight seals at bearing covers, preventing lubricant leakage and blocking abrasive mud contaminants from damaging rotating surfaces.
Structural Characteristics
These CSF-800 crankshaft components feature a rugged, symmetrically balanced modular design optimized for field serviceability: a solid forged crankshaft with precision-ground journals for minimal friction, split left/right bearing carriers for simplified installation and removal, and indexed eccentric components for consistent stroke length. The symmetrical carrier layout ensures uniform load distribution across bearings, while captive retainer hardware eliminates small part loss during on-site repairs. All components are engineered for direct interchangeability with OEM hardware, supporting partial repairs or full crankshaft assembly overhauls.
Applicable Operating Conditions
These components are engineered to perform reliably in the harshest drilling environments: onshore deep-well oil/gas exploration, offshore platform well servicing, directional drilling, geothermal drilling, and high-solid abrasive mud circulation operations. They tolerate extreme temperature fluctuations (-20°F to 220°F), continuous torsional load cycling, high-vibration rig conditions, and exposure to corrosive drilling fluids, making them suitable for remote land rigs, offshore vessels, and heavy-duty commercial drilling installations worldwide.
Maintenance & Servicing Recommendations
To maximize crankshaft assembly lifespan and prevent catastrophic failures, follow these industry-approved protocols: inspect bearing carriers, retainers, and fasteners every 300 operating hours for wear, loosening, or damage, replacing worn components immediately; check crankshaft journal alignment and bearing clearance quarterly using precision gauges, adjusting shims and spacers to maintain OEM specifications; re-torque all cap screws and locking nuts to factory torque values every 450 hours, applying Loctite 242 to threaded connections for enhanced vibration resistance; inspect gaskets and packing washers during every service interval, replacing them to prevent lubricant leaks; and lubricate bearings with API-approved high-viscosity lubricant at scheduled intervals to reduce friction and heat buildup.
- We supply the following spare parts:
| CSF-800 Crankshaft Assembly | ||
| Item No. | Description | Part No. |
| CSF-800 | ||
| 1 | Main bearing cover | CS34001-02.01 |
| 2 | Bearing carrier, left | CS34001-02.02 |
| 3 | Gasket, main bearing cover | CS34001-02.03 |
| 4 | Inner race retainer | CS34001-02.04 |
| 5 | Outer race retainer | CS34001-02.05 |
| 6 | Eccentric strap | CS34001-02.06 |
| 7 | Inner race retainer(I) | CS34001-02.07 |
| 8 | Crankshaft | CS34001-02.08.0 0 |
| 9 | Inner race retainer(II) | CS34001-02.09 |
| 10 | Eccentric ring gear | CS34001-02.10 |
| 11 | Cap screw | T50-2017 |
| 12 | Spacer, main bearing | CS34001-02.13 |
| 13 | Bearing carrier, right | CS34001-02.14 |
| 14 | Outer race retainer | —————— |
| Flange | CS34001-02.11 | |
| 15 | Outer race retainer | CS34001-02.16 |
| 16 | Housing bolt, main bearing | —————— |
| Bearing dowel screw | CS33001-01.01.0 3B | |
| 17 | Shim set | CS34001-02.18 |
| 18 | Cap screw T50-3004K | 5/8″×120 |
| 19 | Locking nut | CS34001-05.12.0 0 |
| 20 | Cap screw T50-1008K | 5/8″×40 |
| Cap screw T50-2002K | —————— | |
| 21 | Cap screw T50-1008K | 5/8″×45 |
| Cap screw T50-2002K | —————— | |
| Cap screw T50-2006K | —————— | |
| 22 | Eccentric bearing | CS34001-02.19 |
| 23 | Bearing | CS34001-02.20 |
| 24 | Washer GB848 | 16 |
| 25 | Safety wire Ø1.5 | GB344-64 |
| 26 | Safety wireØ3 | GB344-64 |
| 27 | Loctite | 242 |
| 28 | Combination packing washer | JB982-77 |
Field Failure Repair Case Studies
Case 1: Worn Outer Race Retainer Causing Bearing Misalignment
A land drilling rig operating a CSF-800 pump reported abnormal crankshaft noise and vibration, traced to a degraded outer race retainer that allowed bearing shifting. Replacing the OEM-spec outer race retainer and re-aligning the bearing carrier restored smooth rotation, eliminating vibration and preventing further bearing damage.
Case 2: Loose Cap Screws Leading to Crankshaft Backlash
An offshore service crew faced a sudden drop in pumping pressure due to loose 5/8” cap screws on the main bearing housing, causing excessive crankshaft backlash. Re-torquing the fasteners with Loctite 242, replacing worn washers, and rebalancing the crankshaft restored full operational capacity.
Case 3: Worn Eccentric Bearing Reducing Pump Efficiency
A remote drilling rig experienced inconsistent stroke length and reduced output, caused by a worn eccentric bearing. Installing a new OEM-grade eccentric bearing, adjusting shim clearance, and securing retainers restored full pumping efficiency and rotational balance.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these crankshaft parts compatible only with the CSF-800 mud pump? | Yes, all components are precision machined exclusively for the Sichuan Petroleum CSF-800 mud pump, matching OEM dimensional and performance specifications exactly. |
| What material is the CSF-800 crankshaft made from? | The crankshaft is forged from high-strength alloy steel, heat-treated for maximum torsional fatigue resistance and durability under heavy drilling loads. |
| Does this parts list include all hardware for full crankshaft assembly? | Yes, it includes all required bearings, retainers, fasteners, shims, gaskets, and locking hardware for complete assembly and rebuild of the CSF-800 crankshaft system. |
Conclusion & Procurement Guidance
This CSF-800 mud pump crankshaft assembly parts list is your definitive, API 7K-compliant resource for all power transmission component procurement, maintenance, and repair needs for the CSF-800 pump. It eliminates the risk of ordering ill-fitting, low-quality parts that cause catastrophic failures, provides clear part numbers and specifications for seamless, accurate ordering, and establishes a reliable technical standard for troubleshooting crankshaft misalignment, bearing wear, and fastener issues. Whether you are replacing worn bearing retainers, rebuilding the full eccentric assembly, restocking high-tensile fasteners, or performing a complete crankshaft overhaul, this guide provides all critical details to make informed, cost-effective purchasing decisions. Choosing these precision-engineered, field-proven components ensures your CSF-800 mud pump maintains optimal power transmission, minimizes costly rig downtime, and withstands the harshest torsional and vibration stresses of heavy-duty drilling long-term. Reach out to secure these essential crankshaft assembly parts and keep your drilling operations running smoothly with reliable, OEM-equivalent components tailored to your exact CSF-800 pump configuration.
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