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FAW J6P/JH6 Truck Weichai Engine Spare Parts 1117050B81DM Fuel Filter Diesel Filter
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The 1117050B81DM is a high-efficiency, spin-on secondary (fine) diesel fuel filter designed for use in heavy-duty diesel engines, particularly those manufactured by FAW (First Automotive Works) and Weichai Power. It serves as a critical component in modern diesel fuel systems, protecting sensitive high-pressure injection components such as common rail pumps and injectors from contamination.
This filter ensures clean, dry fuel delivery under extreme operating conditions, making it essential for engine reliability, performance, and longevity.
| Attribute | Description |
|---|---|
| Part Name | Diesel Fuel Filter (Fine / Secondary Stage) |
| OEM Number | 1117050B81DM |
| Alternative FAW Numbers | 1117050-81DM, 1117050A81DM |
| Type | Spin-On, Full-Flow, Replaceable Canister |
| Filtration Stage | Secondary / Fine Filtration (Post-primary or final stage) |
| Application | Heavy-Duty Trucks, Buses, Construction Machinery |
| Genuine Part | Yes – OEM specification for FAW & Weichai platforms |
| Quality Standard | Meets or exceeds ISO 9001, GB/T standards |
| Parameter | Value |
|---|---|
| Filter Type | Spin-On, Pleated Cartridge Design |
| Filtration Efficiency | High-Precision Filtration |
| Nominal Filtration Rating | ≤ 5 microns (µm) — captures fine particles including soot, rust, sand, and wear debris |
| Water Separation Efficiency | Up to 93% @ 200 ppm input (depending on flow rate and design) |
| Filter Media | Multi-layer pleated synthetic/composite paper with water-repellent coating |
| Housing Material | Composite polymer body with steel end caps (corrosion-resistant) |
| Seal Material | Nitrile Rubber (NBR) O-ring – oil and temperature resistant |
| Thread Size | M32 × 1.5 (Standard heavy-duty diesel thread) |
| Outer Diameter | Approx. Φ108 mm |
| Height | Approx. 263 mm (including base and gasket) |
| Operating Pressure | Designed for high-pressure return/fuel rail systems |
| Max Working Pressure | Up to 500 PSI (34.5 bar) |
| Burst Pressure | > 800 PSI (55 bar) |
| Operating Temperature Range | -20°C to +80°C (-4°F to 176°F) |
| Anti-Drain Back Valve | Integrated (prevents fuel drain-back after shutdown) |
| Weight | ~0.6–0.8 kg (net) |
Designed primarily for Chinese-made commercial vehicles, especially those using FAW Jiefang series trucks and Weichai-powered engines.
FAW Jiefang Series:
J5
J6P, J6V, J6L, J6E, J6G, J6M
JH6
J7 (newer models with matching fuel system)
FAW Tiger V (Hu-V) light/medium-duty truck
Some compatible variants of:
Sinotruk HOWO / A7 trucks
Shacman (Shaanxi) X3000/M3000
Chinese city buses and special-purpose vehicles
FAWDE (Dachai) Engines: CA6DL, CA6DM, CA6DN series (e.g., CA6DM2)
Weichai (Weichai Power) Engines: WP10, WP12, WP13 series
Other engines equipped with M32×1.5 threaded mounting and requiring 5-micron fine filtration
Note: Always verify physical dimensions, seal compatibility, and filtration requirements before installation on non-original equipment.
Ultra-Fine Contaminant Removal: Removes particles down to 5 µm, protecting precision fuel injectors and high-pressure common rail systems.
Effective Water Separation: Prevents microbial growth and corrosion caused by water-in-fuel issues.
Enhanced Engine Protection: Reduces wear on fuel pumps and injectors, significantly extending engine service life.
Improved Combustion Efficiency: Clean fuel improves atomization and combustion stability, boosting fuel economy and reducing emissions.
High Durability: Built to withstand vibration, thermal cycling, and continuous high-pressure operation typical in long-haul transport.
Leak-Proof Sealing: Precision-engineered gasket ensures secure fit and prevents fuel leakage.
Easy Replacement: No tools required for removal (hand-tighten only), minimizing downtime.
This part is widely cross-referenced across global filtration brands and OEMs:
| Brand | Part Number |
|---|---|
| FAW Original Equipment | 1117050B81DM, 1117050-81DM, 1117050A81DM |
| Weichai OE Number | 612630080087 |
| MANN-FILTER | WDK 11 102/4 |
| Fleetguard (Donaldson) | FF5979, BF9817 (possible equivalent) |
| Hengst Filter | H200WDK, KIT804 |
| Volvo/Renault Trucks OE | 20430751, 20972293, 7420541381 |
| Mack Trucks OE | 20539582, 20976005 |
| Universal Fitment Code | Suitable for many CNHTC, Sinotruk, and export-market applications |
Search Tips: Use keywords like "1117050B81DM fuel filter", "FF5979 replacement", or "5-micron diesel fine filter for Weichai" when sourcing online.
Follow these best practices to ensure safe and effective operation:
Regular Replacement Required
→ Replace according to manufacturer’s maintenance schedule:
External Spin-On Filters: Every 8,000–10,000 km under normal conditions
Harsh Conditions (dusty, humid, poor fuel quality): As frequent as 5,000 km
Some integrated systems may have longer intervals up to 40,000 km — always follow vehicle manual.
Pre-Lubricate the Seal
→ Apply a thin layer of clean diesel fuel or light oil to the rubber O-ring before installation to prevent dry friction and ensure proper sealing.
Correct Tightening Procedure
→ Hand-tighten until the gasket contacts the mounting surface. Then turn an additional ¾ turn (3/4 turn) with a filter wrench.
❌ Never over-tighten — this can damage the housing, crush the seal, or cause leaks.
Bleed Air from Fuel System
→ After replacement, bleed air from the fuel line per vehicle instructions (manual primer pump or electric pump cycle). Failure to do so may cause hard starting or no-start condition.
Check for Leaks After Start-Up
→ Run the engine at idle for 2–3 minutes and inspect around the filter base for any signs of fuel seepage.
Use High-Quality Replacement Filters Only
→ Avoid low-cost counterfeit or substandard filters that may lack micron-level efficiency or burst strength. Poor filtration can lead to injector failure or HP pump damage.
Dispose of Used Filters Properly
→ Spent fuel filters contain residual hydrocarbons and must be recycled or disposed of in accordance with local environmental regulations.
Storage Conditions
→ Store new filters in a cool, dry place away from direct sunlight and extreme temperatures to preserve media integrity.
Long-Haul Freight Transport
Construction & Mining Operations
Urban Public Transit Buses
Cold Climate Regions (winter gelling risk mitigated by good filtration)
High-Dust/Sandy Areas (desert, rural roads)
Packaging: Individual box or multi-pack; labeled with part number, barcode, batch code, production date
Markings: Includes directional arrows (if applicable), warnings, and compliance labels
Warranty: Typically 12 months against manufacturing defects (varies by supplier)
Origin: China (produced for FAW, Weichai, or licensed aftermarket suppliers)
The Fuel Filter 1117050B81DM is a critical protection device for modern high-pressure diesel engines used in Chinese heavy-duty trucks. With 5-micron filtration precision, robust construction, and broad compatibility across FAW, Weichai, HOWO, and Shacman platforms, it plays a vital role in maintaining fuel system cleanliness, preventing costly repairs, and ensuring optimal engine performance.
