The FAW 1004019B81D piston pin snap ring is a small yet vital internal engine component built for heavy-duty commercial truck engines. Manufactured under original OEM specifications, this genuine circlip keeps the piston pin correctly positioned inside the piston assembly, ensuring smooth operation and preventing severe engine block scoring during long-haul driving.
💪Reliable Internal Retention for Heavy-Duty Diesels
Maintaining secure internal fasteners is crucial during engine overhauls. The 1004019B81D snap ring delivers dependable performance:
- Precision Tension Control: Designed to snap securely into the piston groove with exact radial force, eliminating loosening under high-speed reciprocating cycles.
- Seamless OEM Interchangeability: Perfectly replaces older material numbers like 1004019-81D and 2S1004019-81D without requiring modifications.
- High Thermal Endurance: Treated steel composition resists micro-cracking and loss of spring tension under severe high-temperature operating conditions.
🛠Technical Specifications & Keyword Reference
| Feature | Technical Details |
| Primary OEM Part Number | 1004019B81D |
| Legacy / Superseded Numbers | 1004019-81D, 2S1004019-81D, 2S1004019-81DL, S1004019-81D |
| Focus Component | Piston Pin Snap Ring / Circlip |
| Vehicle Compatibility | FAW Commercial Trucks & Tractor Units |
| Product Function | Piston Pin Locking & Retention |
| Quality Level | Original Equipment Manufacturer (OEM) Standard |
| Wholesale Support | +86 186 7197 8898 |
- Worldwide Shipping
- 100% Genuine Parts
- Expert Technical Support
💬Frequently Asked Questions (Technical & Buying Guide)
Q: What is the relation between part number 1004019B81D and older numbers like 1004019-81D?
A: Part numbers 1004019-81D, 2S1004019-81D, 2S1004019-81DL, and S1004019-81D are discontinued or legacy material numbers. 1004019B81D is the updated, direct reference replacement part with identical specifications and fitment.
Q: What is the main function of the 1004019B81D snap ring?
A: It locks the piston pin inside the piston bore, preventing it from sliding outward and damaging the cylinder walls during engine operation.
Q: How do I verify that part number 1004019B81D fits my engine?
A: You can check your old parts catalog or send your FAW truck chassis VIN and engine serial number to our technical support team via WhatsApp at +86 186 7197 8898 for instant confirmation.
📦Global Wholesale & Export Enquiries
We export genuine FAW heavy-duty engine and internal overhaul components to commercial fleet managers, maintenance hubs, and automotive spare parts distributors worldwide. Contact us today for competitive bulk pricing and fast international shipping.
