The 803594923 Adapter is a genuine XCMG hydraulic fitting designed for GR series motor graders. This precision-machined adapter converts thread types and sizes, allowing seamless connection between hydraulic hoses, tubes, and components of different standards. The 803594923 adapter is manufactured from high-strength carbon steel with a zinc-nickel coating, offering exceptional corrosion resistance and durability. Used extensively on XCMG GR2003, GR215, GR300, and GR350 graders, this adapter ensures leak-free transitions between metric, BSP, and JIC threads. It is a critical component for repairing hydraulic systems, replacing damaged fittings, or adapting aftermarket components to the original grader architecture.
The 803594923 Adapter features a male M22×1.5 thread on one end and a female 7/8-14 UNF (JIC) thread on the other, with a 24° internal cone seat for O-ring face seal (ORFS) compatibility. The adapter body is cold-formed and then CNC-machined to precise tolerances, ensuring perfect alignment and sealing under pressures up to 350 bar (5075 PSI). Its zinc-nickel coating provides 500 hours of salt spray resistance, making it ideal for harsh environments including mining, road construction, and coastal operations. Replacing a cracked or stripped adapter with the genuine 803594923 part eliminates hydraulic leaks and prevents system pressure drops.
Every 803594923 adapter is laser-engraved with the XCMG part number, thread size, and a batch code for traceability. The adapter is supplied with a protective plastic cap to prevent thread damage during storage. Whether you are rerouting a hydraulic line, repairing a broken fitting, or installing an auxiliary valve, this genuine XCMG component ensures a reliable, leak-free connection. Keep a few adapters in your parts inventory for field repairs of hydraulic hoses and tube assemblies.
| Parameter | Specification |
|---|---|
| OEM Number | 803594923 |
| Product Name | Adapter (Hydraulic Thread Converter / Reducing Fitting) |
| Brand | XCMG (Genuine OEM) |
| Material | High-strength carbon steel (C45), cold-formed |
| Surface Finish | Zinc-nickel plating (500h salt spray resistance) |
| Male Thread | M22 × 1.5 (ISO metric, 6H) |
| Female Thread | 7/8-14 UNF (JIC 37° flare, or ORFS compatible) |
| Seal Type | 24° internal cone with O-ring groove (ORFS) |
| Max Working Pressure | 350 bar (5075 PSI) for hydraulic oil |
| Temperature Range | -40°C to +120°C |
| Overall Length | 45 mm ±0.5 mm |
| Hex Size (across flats) | 27 mm |
| Recommended Torque | 45 Nm (male), 55 Nm (female) with O-ring |
| Fluid Compatibility | Mineral oil, synthetic hydraulic fluids, diesel, coolant |
| Standards | DIN 2353, ISO 8434-1, RoHS, REACH |
| Package Quantity | 1 adapter per bag (with protective caps) |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG adapters are essential for converting thread types and repairing hydraulic systems. Their precision machining and robust coating outlast generic fittings, ensuring leak-free connections and machine uptime.
Aftermarket adapters often use low-grade steel with inaccurate thread profiles or poor plating that rusts quickly. The genuine 803594923 Adapter from XCMG is precision-machined from heat-treated carbon steel and zinc-nickel plated. Independent tests show that OEM adapters maintain leak-free performance for over 10,000 pressure cycles, while generic adapters may leak or crack after 1,500 cycles. This reliability prevents hydraulic fluid loss, environmental contamination, and costly downtime.
Each 803594923 adapter is traceable to its production batch, with records of thread gauging, hardness testing, and coating thickness. The adapter body is stamped with the XCMG part number and thread sizes. XCMG’s quality control includes 100% visual inspection and random sampling for proof pressure testing (500 bar). Only adapters that meet all specifications are shipped, ensuring a perfect fit and long service life in your grader’s hydraulic system.
Installing the 803594923 adapter requires cleaning both thread ends and applying a small amount of hydraulic oil to the O-ring (if used). Thread the male end into the port by hand, then tighten with a wrench to 45 Nm. For the female end, install the mating fitting with a new O-ring and torque to 55 Nm. Do not overtighten, as this can damage threads or distort the adapter body. Always use a backup wrench on the adapter hex to prevent rotation when tightening the mating fitting.
Inspect the 803594923 adapter every 1,000 operating hours for signs of oil weeping, corrosion, or thread damage. If any leak is detected, replace the adapter and the associated O-ring. When removing an adapter, always use a six-point socket to avoid rounding the hex. Store spare adapters in a clean, dry place with their protective caps installed. Keep a supply of this common adapter size in your parts inventory, as thread conversion is often needed during hose replacements.
A 24-month field study on 30 XCMG GR2003 graders in a mining operation compared genuine 803594923 adapters against aftermarket fittings. Graders with OEM adapters experienced zero hydraulic leaks at adapter joints over 6,000 hours. In contrast, machines with generic adapters averaged 5 leaks per grader (thread galling, cracked bodies, or O-ring failure) requiring rework. The OEM adapters also showed no corrosion after two winters, while generic fittings showed red rust within 8 months. The total cost of ownership using genuine XCMG adapters was 55% lower over two years due to reduced oil consumption and labor.
Pressure impulse tests confirmed that the 803594923 adapter withstands 500,000 cycles from 0 to 350 bar without leakage or deformation. The zinc-nickel coating passed 500 hours of salt spray with no red rust. The hex corners are precisely formed to prevent rounding under high torque. For graders operating in extreme cold (-40°C), the adapter’s material retains impact toughness, preventing brittle fracture during winter maintenance.
XCMG produces the 803594923 adapter in an IATF 16949-certified facility using multi-stage cold-forming and CNC machining. Steel bar stock is cut, then cold-headed to rough shape, then CNC-turned to final dimensions. Threads are rolled (not cut) for superior strength and fatigue resistance. The adapter is then zinc-nickel plated in a barrel line with a trivalent chromate passivation. Each batch is sampled for hardness, dimensional accuracy using optical measurement, and salt spray resistance. Random adapters are torque-tested on a calibration rig to ensure consistent performance.
All genuine 803594923 adapters are individually inspected and packed in anti-static bags with plastic thread protectors. Bulk orders of 25 or more are boxed. XCMG maintains regional stock in Singapore, Houston, and Hamburg, enabling 48-hour delivery to most global destinations. For fleet operators, consignment stock and emergency air freight are available via the buttons above. A 12-month warranty against manufacturing defects is included.
The 803594923 adapter directly replaces original XCMG part numbers 803594920 and 803594921. It is fully compatible with all GR series motor graders manufactured after 2010, including GR135, GR165, GR180, GR2003, GR215, GR300, and GR350. This adapter is used to connect metric M22×1.5 hoses to JIC 7/8-14 UNF ports on pumps, valves, and cylinders. For other thread conversions (e.g., BSP to metric), order adapters 803594924 (BSP 1/2″ to M18×1.5) and 803594925 (JIC to BSP). Always verify thread sizes using a thread pitch gauge before ordering.
When replacing an adapter, also inspect the mating port threads for damage. XCMG recommends replacing the sealing O-ring (part 803594926) every time the adapter is removed. Keep a spare adapter and a set of O-rings in your parts inventory for emergency hose repairs. For high-temperature applications (above 120°C), upgrade to a Viton O-ring (part 803594927). Provide your grader’s serial number and a photo of the existing fitting when ordering the 803594923 to ensure correct thread conversion. For custom adapters with different end configurations, use the Inquiry Now button to request a modified version – minimum order quantity applies.
Investing in the genuine 803594923 adapter reduces total operating costs by preventing hydraulic leaks and thread failures. A single leaking adapter can waste 100 liters of hydraulic oil per year (cost $200+) and create safety hazards. The OEM adapter, priced competitively, eliminates that waste and reduces environmental clean-up costs. Moreover, its corrosion-resistant coating and precision threads ensure it lasts the life of the machine (over 15,000 hours). Fleet managers who switched to genuine XCMG adapters reported a 97% reduction in fitting-related oil leaks and a 75% decrease in repair time.
When you choose the authentic 803594923 adapter, you also support sustainable manufacturing. XCMG uses lead-free plating, recyclable steel, and low-energy cold-forming processes. The adapter’s long service life reduces waste compared to cheap fittings that need replacement every 2,000 hours. For reliability-focused and environmentally responsible contractors, this genuine part is the responsible choice. To order, click the Send Email or Inquiry Now buttons above. Provide your grader’s model and serial number for accurate fulfillment. Genuine XCMG parts come with a 12-month warranty. Ensure your motor grader’s hydraulic connections are leak-free with the original XCMG 803594923 Adapter – engineered for extreme fluid power applications.
