Genuine XCMG Fitting with OEM number 803183237 (VKA3/12LCF) is a precision-engineered pressure test connector designed for motor grader hydraulic diagnostic systems. This specialized fitting, 803183237, enables accurate pressure measurement in brake circuits, steering systems, and implement hydraulics without disconnecting existing hoses. Manufactured to exact XCMG specifications, it features a compact body with an integrated check valve that seals automatically when the test probe is removed.
Engineered for GR135, GR165, GR180, GR215, GR300, and GR350 motor graders, the 803183237 VKA3/12LCF fitting is used as a permanent test point in hydraulic circuits. Its spring-loaded poppet design prevents fluid loss and contamination ingress, allowing maintenance teams to connect diagnostic equipment safely and quickly under full system pressure.
By choosing OEM 803183237, fleet operators can perform routine pressure checks, troubleshoot valve performance, and monitor pump health without interrupting machine operation. This genuine XCMG fitting guarantees accurate readings, leak-free connections, and long-term reliability in the most demanding construction environments.
| Parameter | Specification / Value |
|---|---|
| OEM Number | 803183237 |
| Alternative Designation | VKA3/12LCF Connector |
| Brand | XCMG (Original Genuine Part) |
| Product Type | Pressure Test Connector / Test Point Fitting |
| Thread Size | M12 × 1.5 (metric fine thread) |
| Connection Type | VKA3 series test point – compatible with standard 3/8″ pressure test hose |
| Material | Cold-formed carbon steel (C45E), zinc-nickel plated |
| Sealing Mechanism | Integrated spring-loaded poppet check valve + bonded washer |
| Max. Operating Pressure | 420 bar (6090 PSI) |
| Temperature Range | -40°C to +125°C |
| Hex Size | 17 mm |
| Overall Length | 30 mm |
| Media Compatibility | Mineral oils, synthetic hydraulic fluids, diesel, water-glycol |
| Compatible Models | XCMG GR135, GR165, GR180, GR200, GR215, GR300, GR350, GR2153, GR3003 |
| Standards | ISO 15171-2, DIN 2353, XCMG factory specification |
The XCMG 803183237 VKA3/12LCF fitting incorporates a spring-loaded poppet that remains closed when the test probe is disconnected, preventing fluid loss and keeping contaminants out of the hydraulic system. This design allows permanent installation of test points without compromising circuit integrity.
Zinc-nickel plating provides exceptional corrosion protection, withstanding 480 hours of salt spray testing (ASTM B117). The cold-formed steel body ensures superior fatigue resistance compared to machined fittings, reducing the risk of cracking under vibration.
Each 803183237 fitting is 100% pressure-tested at 630 bar to verify structural integrity and poppet sealing performance before packaging. The bonded washer ensures a leak-free interface with the hydraulic port.
The 803183237 fitting is typically installed on the main hydraulic pump discharge line, steering control valve inlet, brake accumulator charge port, and blade lift cylinder circuits. It enables technicians to verify pump output pressure (typically 160–200 bar) and detect internal leakage without breaking hydraulic connections.
During circle drive diagnostics, this fitting allows measurement of charge pressure for the hydrostatic transmission. For brake system troubleshooting, it enables pressure checks at the dual-circuit brake valve without draining fluid.
Routine use of OEM 803183237 reduces diagnostic time by up to 70%, prevents unnecessary component replacement, and helps identify developing issues before they cause downtime.
Before installing the 803183237 fitting, clean the female port threads and inspect for burrs. Hand-tighten until the bonded washer contacts the face, then torque to 20–25 Nm. Do not exceed 30 Nm to avoid distorting the washer or damaging the poppet mechanism.
To take a pressure reading, connect a VKA3-compatible test hose with a female coupling. Push the coupling onto the fitting until it clicks – the poppet will open automatically. After measurement, disconnect the test hose; the poppet will close instantly, sealing the port.
Inspect the 803183237 fitting during each hydraulic oil change. Look for any signs of seepage or damage to the poppet. If the fitting is removed, always replace the bonded washer (XCMG part 803183238) to ensure a proper seal.
Generic test fittings often use low-grade steel with poor heat treatment, leading to poppet spring fatigue and premature leakage. The OEM 803183237 maintains consistent spring force and sealing performance even after thousands of connection cycles.
Laboratory tests show genuine XCMG fittings withstand 10,000 connection/disconnection cycles without leakage, while generic copies fail after 2,000 cycles due to poppet seat wear.
The zinc-nickel plating on OEM fittings provides 3x better corrosion resistance than standard zinc plating, ensuring reliable operation in coastal or winter road maintenance environments.
Each 803183237 fitting is manufactured in XCMG‘s ISO 9001:2015 certified facility. Random samples undergo poppet cycle testing (10,000 cycles), pressure decay testing, and salt spray resistance verification. Plating thickness is measured via X-ray fluorescence.
Full traceability from raw material lot to finished product allows quality audits and recalls if needed. XCMG provides a 12-month warranty against manufacturing defects. Rejection rate for non-conforming parts is below 0.2%.
OEM 803183237 replaces older part numbers 803183235 and 803183236. It is fully compatible with all XCMG GR-series motor graders produced after 2008. For machines with different port threads, refer to 803183239 (M14×1.5) and 803183240 (G1/4″).
For complete diagnostic capability, order this fitting together with test hose assembly 803183241 and pressure gauge 803183242. Bulk packaging (25 units) available for dealer workshops and fleet maintenance.
Q: Can the 803183237 fitting be used with water-based hydraulic fluids? A: Yes, the steel body and NBR bonded washer are compatible with water-glycol and water-oil emulsions. Avoid phosphate esters.
Q: What test hose coupling is required? A: Use a VKA3-compatible coupling with 3/8″ connection. XCMG offers test hose assembly 803183241 for this purpose.
Q: How to detect a faulty poppet? A: If hydraulic fluid weeps from the fitting when no test hose is connected, the poppet or seat is damaged. Replace the fitting immediately.
Q: What is the recommended replacement interval? A: Replace every 5,000 operating hours or when visible leakage occurs. In corrosive environments, inspect annually.
*All specifications based on XCMG engineering standards. OEM 803183237 VKA3/12LCF is the official pressure test fitting for GR-series motor graders. No printed contact details or form fields.
