Genuine XCMG Fitting with OEM number 803105404 is a precision-machined straight hydraulic connector designed for motor grader fluid power systems. This essential component, 803105404, ensures leak-free performance in high-pressure circuits including steering, braking, and implement controls. Manufactured from cold-headed carbon steel with zinc-nickel plating, it withstands extreme vibration, corrosion, and pressure spikes up to 420 bar (6090 PSI).
Engineered for XCMG GR215, GR300, GR350, and GR2405 motor graders, the 803105404 fitting is used in hydraulic pump lines, valve manifolds, and cylinder port connections. Its compact design with a 14mm hex and M12×1.5 metric fine thread ensures easy installation in tight engine compartments while maintaining full flow capacity. The integrated bonded washer provides a reliable seal without the need for thread tape or sealant.
By choosing OEM 803105404, maintenance teams eliminate cross-threading risks, reduce assembly time, and prevent costly fluid leaks. This genuine XCMG fitting guarantees perfect thread engagement, superior sealing, and long-term reliability under the most demanding construction site conditions, including mining, road building, and land leveling operations.
| Parameter | Specification / Value |
|---|---|
| OEM Number | 803105404 |
| Brand | XCMG (Original Genuine Part) |
| Product Type | Straight Thread Hydraulic Fitting |
| Thread Size | M12 × 1.5 (metric fine thread) |
| Hex Size | 14 mm |
| Overall Length | 34 mm |
| Material | Cold-headed carbon steel (C45E) + zinc-nickel plating (480h salt spray) |
| Seal Type | Pre-assembled bonded washer (NBR + steel) |
| Max. Operating Pressure | 420 bar (6090 PSI) |
| Burst Pressure | ≥ 1260 bar |
| Temperature Range | -40°C to +125°C |
| Media Compatibility | Mineral oils, synthetic hydraulic fluids, diesel, water-glycol |
| Application Zones | Hydraulic pump lines, steering valve, brake manifold, cylinder ports |
| Compatible Models | XCMG GR135, GR165, GR215, GR300, GR350, GR2405, GR1803 |
| Standards | ISO 8434-1, DIN 2353, XCMG factory specification |
The XCMG 803105404 fitting is produced using multi-stage cold heading, which preserves material grain flow and enhances fatigue resistance. Zinc-nickel plating offers three times the corrosion protection of standard zinc, passing 480 hours of salt spray testing (ASTM B117).
Unlike generic fittings, this OEM component features a radiused thread root and a precision-machined seating surface that eliminates stress risers. Each fitting is 100% pressure-tested at 630 bar to verify structural integrity before packaging.
The bonded washer is made of NBR rubber bonded to a steel backing ring, ensuring consistent compression and sealing even after repeated installation cycles.
The 803105404 fitting is typically installed on the main hydraulic pump discharge line, steering control valve inlet, and brake accumulator charge port. It also secures cylinder hoses on blade lift and circle drive circuits.
Proper fitting selection prevents thread galling, which can ruin expensive valve blocks. Using genuine 803105404 ensures correct engagement depth and leak-free sealing under high-frequency pressure pulsations.
In mining and heavy construction, this fitting reduces unplanned downtime by eliminating fluid leaks that lead to environmental hazards and component starvation.
Before installation, clean the female port threads and inspect for burrs or old seal remnants. Apply a drop of medium-strength thread locker (Loctite 243) for vibration-prone areas.
Hand-tighten the 803105404 fitting until the bonded washer contacts the face, then torque to 25–30 Nm. Do not exceed 35 Nm to avoid distorting the washer.
During scheduled maintenance (every 500 hours), inspect fittings for signs of leakage, rust, or thread damage. Replace immediately if the hex corners are stripped or plating is compromised.
Generic fittings often use low-grade steel with inconsistent heat treatment, leading to thread seizure and early cracking. The OEM 803105404 maintains precise thread geometry and consistent hardness (HRC 28–32).
Laboratory vibration tests (1.5 million cycles at 50 Hz) show zero loosening on genuine fittings, while generic copies fail after 300,000 cycles. The bonded washer on OEM fittings provides superior sealing even under extreme pressure spikes.
Investing in genuine XCMG 803105404 eliminates leak paths, reduces oil consumption, and prevents contamination ingress through loose connections.
Each 803105404 fitting is manufactured in XCMG’s ISO 9001:2015 certified facility. Random samples undergo tensile, hardness, and torque retention tests. Plating thickness is measured via X-ray fluorescence to ensure consistent protection.
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 803105404 replaces older part numbers 803105402 and 803105403. It is fully compatible with all XCMG GR-series motor graders produced after 2010.
For complete hydraulic overhaul, order this fitting together with bonded washer kit 803105405 and hex bolts 803105406. Bulk packaging (50 units) available for dealer workshops and fleet maintenance.
Q: Can 803105404 be used with PTFE tape? A: No, the bonded washer provides the seal. Tape may cause thread damage and over-torque.
Q: What is the recommended replacement interval? A: Replace every 2000 operating hours or when plating shows red rust. In corrosive environments (road salt), inspect annually.
Q: How to identify a genuine XCMG fitting? A: Genuine parts have laser-etched OEM number 803105404 on the hex face and uniform zinc-nickel finish.
Q: Is this fitting compatible with bio-hydraulic oils? A: Yes, the NBR bonded washer and steel body are compatible with HEPG, HEES, and mineral oils. Avoid phosphate esters.
*All specifications based on XCMG engineering standards. OEM 803105404 is the official straight thread fitting for GR-series motor graders. No printed contact details or form fields.
