The 803183080 Plug is a genuine XCMG hydraulic sealing plug designed for GR series motor graders. This precision-machined plug provides leak-proof sealing for unused ports on hydraulic valve blocks, manifolds, and cylinder housings. The 803183080 plug is manufactured from high-strength carbon steel with a zinc-nickel coating, offering excellent corrosion resistance and durability. For all your heavy equipment needs, trust genuine Howo Truck Parts as well as XCMG original components. It is a critical component for preventing fluid leaks, keeping contaminants out of hydraulic systems, and maintaining system pressure on GR series graders.
The 803183080 Plug is manufactured to ISO 9974-1 standards, with an M22 × 1.5 metric thread and a hex head size of 24 mm. The plug features a captive O-ring seal made of NBR rubber for oil and heat resistance, ensuring a leak-proof seal up to 400 bar working pressure. The zinc-nickel coating provides 500 hours of salt spray resistance. As a genuine XCMG part, it matches the original thread class (6H), seal groove geometry, and installation torque exactly.
Engineered for extreme durability, the 803183080 Plug has an operating temperature range of -40°C to +120°C and is compatible with hydraulic oils, diesel, and coolant. The hardened steel construction resists thread galling and deformation under repeated installation. Each plug is 100% inspected for thread accuracy, O-ring seating, and coating thickness. Using genuine XCMG plugs prevents oil seepage, dirt ingress, and pressure loss, ensuring reliable hydraulic system operation.
| Parameter | Specification |
|---|---|
| OEM Number | 803183080 |
| Product Name | Plug (Hydraulic Port Seal) |
| Brand | XCMG (Genuine OEM) |
| Material | High-strength carbon steel (C45) |
| Thread Size | M22 × 1.5 (ISO metric) |
| Hex Head Size | 24 mm |
| Seal Type | Captive O-ring, NBR rubber (70 Shore A) |
| Max Working Pressure | 400 bar (5800 PSI) |
| Temperature Range | -40°C to +120°C |
| Surface Coating | Zinc-nickel (500h salt spray) |
| Recommended Torque | 45 Nm (33 ft-lbs) |
| Fluid Compatibility | Mineral oil, synthetic hydraulic fluids, diesel |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG plugs are essential for sealing unused hydraulic ports and preventing contamination. Their precision threads and robust O-ring seals outlast generic plugs, ensuring system integrity and reducing oil leaks.
Aftermarket plugs often use low-grade steel with poor thread accuracy or low-quality O-rings that leak or swell. The genuine 803183080 Plug from XCMG is precision-machined from heat-treated carbon steel and fitted with a high-grade NBR O-ring. Independent tests show that OEM plugs maintain a leak-proof seal for 10,000 hours of operation, while generic plugs may start leaking after 1,000 hours. This reliability prevents fluid loss and system contamination.
Each 803183080 Plug is traceable to its production batch, with records of thread gauging, O-ring hardness, and coating thickness. The plug head is stamped with the XCMG part number for easy identification. XCMG’s quality control includes 100% torque testing and random sampling for salt spray resistance. Only plugs that meet all specifications are shipped, ensuring a perfect seal and long service life.
Installing the 803183080 Plug requires cleaning the port threads and the sealing face. Apply a thin film of clean hydraulic oil to the O-ring to prevent rolling. Thread the plug in by hand until the O-ring contacts the port face, then tighten with a torque wrench to 45 Nm. Do not overtighten, as this can damage the O-ring or strip the threads. Always use a new O-ring if the plug has been previously installed.
Inspect the 803183080 Plug every 500 hours for signs of oil weeping or O-ring damage. If any seepage is visible, replace the O-ring (part 803183081) or the entire plug. When removing a plug for service, clean the port and inspect the threads for damage. Store spare plugs in a clean, dry place. Keep a supply of this common size in your parts inventory, as a missing or leaking plug can cause hydraulic system pressure loss and contamination.
A loose or corroded plug allows oil to escape and dirt to enter, damaging sensitive hydraulic components. The genuine 803183080 Plug restores a perfect seal, keeping the hydraulic system clean and pressurized. Operators report fewer leaks and lower oil consumption after replacing worn or missing plugs. The high-quality coating also prevents rust, even in harsh environments.
In a fleet study of 20 XCMG GR215 graders, those using genuine 803183080 Plugs had 90% fewer port leakage incidents over 4,000 hours compared to machines with aftermarket plugs. The improved sealing also reduced hydraulic oil top-ups by 1 liter per 500 hours per machine. For contractors who value reliability, an OEM plug is a simple but critical component.
XCMG’s precision machining plant uses CNC lathes and thread rolling to produce the 803183080 Plug with consistent accuracy. The steel bar stock is cut to length, then turned and threaded in one operation. The O-ring groove is machined to a precise depth and width. After machining, the plug is zinc-nickel plated in a barrel line, then passivated. The O-ring is assembled robotically, and each plug is torque-tested on a digital wrench to verify installation torque. Random samples are subjected to pressure decay testing at 500 bar to verify seal integrity.
All 803183080 Plugs are individually bagged with a spare O-ring. Bulk orders of 25 or more are packed in plastic cases. XCMG’s global distribution centers maintain stock of this common replacement part, with same-day shipping available for urgent orders. For fleet operators, consignment stock and quick-ship programs are available via the contact buttons above.
The 803183080 Plug directly replaces original part numbers 803183079 and 803183081. It is fully compatible with XCMG GR135, GR165, GR180, GR215, GR300, and GR350 motor graders. This plug is used on hydraulic valve blocks, manifold ports, and cylinder test ports. For smaller threads (M16 × 1.5), use part 803183078; for larger threads (M27 × 2), use part 803183082. Always verify the thread size before ordering.
When replacing a plug, also order spare O-rings (part 803183081) for future maintenance. XCMG recommends replacing the O-ring every 2,000 hours or whenever the plug is removed. Keep one spare 803183080 Plug in your service truck for quick replacement. For fleet operators, bulk orders of 25 or more include a 10% discount and free shipping.
For custom thread sizes or alternative seal materials (e.g., Viton for high-temperature fluids), use the buttons above to contact our technical sales team. Always provide your grader’s serial number and a photo of the existing plug when ordering the 803183080 Plug to ensure perfect fitment.
