The 860123040 Cylinder Liner Water Seal is a genuine XCMG engine sealing component designed for GR series motor graders. This high-quality rubber seal prevents coolant leakage between the cylinder liner and the engine block, ensuring proper cooling system integrity. The 860123040 water seal is manufactured from heat-resistant and coolant-resistant elastomer (HNBR), offering excellent compression set resistance and long-term sealing performance. Used as original equipment on XCMG GR2003, GR215, GR300, and GR350 graders powered by XCMG XC6B or XC6D diesel engines, this seal directly replaces hardened, cracked, or leaking units, preventing coolant contamination of oil and loss of engine cooling. Each seal is 100% inspected for dimensional accuracy, material hardness, and sealing lip integrity.
The 860123040 Cylinder Liner Water Seal features a precision-molded O-ring profile with a rectangular cross-section that seats securely in the liner counterbore. Its HNBR compound provides resistance to ethylene glycol coolant, oils, and temperatures up to 150°C. Replacing a worn or flattened water seal with the genuine 860123040 part eliminates coolant leaks into the crankcase, prevents cylinder liner cavitation, and maintains proper engine temperature. Each seal is supplied in a sealed plastic bag with installation lubricant. Whether you are rebuilding an engine, replacing a leaking liner seal, or performing a major overhaul, this genuine XCMG component ensures a perfect fit and long service life.
Every 860123040 cylinder liner water seal is laser-etched with the XCMG part number and includes a specification card. The seal is packed in a foam-lined box. Keep a set of six seals in your parts inventory for complete engine overhauls.
| Parameter | Specification |
|---|---|
| OEM Number | 860123040 |
| Product Name | Cylinder Liner Water Seal (O-ring type) |
| Brand | XCMG (Genuine OEM) |
| Material | Hydrogenated nitrile butadiene rubber (HNBR) |
| Hardness (Shore A) | 75 ±5 |
| Cross-section Diameter | 6.0 mm ±0.1 mm |
| Inner Diameter | 118.0 mm ±0.2 mm (nominal for 6-cylinder liners) |
| Outer Diameter (installed) | 130.0 mm ±0.2 mm |
| Operating Temperature Range | -40°C to +150°C |
| Compression Set (22h/150°C) | ≤ 25% |
| Coolant Compatibility | Ethylene glycol, OAT, and conventional coolants |
| Oil Compatibility | Excellent (diesel engine oil, mineral, synthetic) |
| Tensile Strength | ≥ 15 MPa |
| Elongation at Break | ≥ 200% |
| Package Quantity | 6 seals per set (one complete engine) |
| Compatible Engines | XCMG XC6B, XC6D, Cummins 6BT5.9 |
| Standards | ISO 9001:2025, ISO 14001, RoHS |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG cylinder liner water seals are critical for engine cooling system integrity. Their advanced HNBR compound and precision molding outlast generic seals, preventing coolant contamination and costly engine damage.
Aftermarket water seals often use standard NBR rubber that hardens and cracks under high coolant temperatures, or poor dimensional accuracy that fails to seal properly. The genuine 860123040 Cylinder Liner Water Seal from XCMG is molded from premium HNBR, which retains flexibility and sealing force even after thousands of thermal cycles. Independent tests show that OEM seals maintain leak-free performance for over 12,000 hours, while generic seals fail after 3,000 hours (leaking coolant into oil). This reliability prevents bearing damage, cylinder wall cavitation, and engine overheating.
Each 860123040 water seal is traceable to its production batch, with records of hardness, tensile strength, and compression set testing. The seal is marked with the XCMG part number. XCMG’s quality control includes 100% dimensional inspection and random sampling for accelerated aging tests (1000 hours at 150°C). Only seals that meet all specifications are shipped, ensuring a perfect fit and long service life for your grader’s engine.
Replacing the 860123040 cylinder liner water seal requires engine disassembly (cylinder head and liner removal). After removing the old liner and cleaning the counterbore, inspect the groove for damage. Lubricate the new seal with the supplied installation lubricant (or clean engine oil). Carefully position the seal into the groove, ensuring no twisting. Press the liner into the block using a suitable liner press tool, taking care not to pinch or cut the seal. Install the cylinder head with a new head gasket. Refill with coolant and check for leaks after engine warm-up.
Inspect the 860123040 seals during every major engine overhaul (every 5,000-8,000 hours). Signs of failure include coolant in oil (milky appearance), external coolant weeping at the liner flange, or engine overheating due to loss of coolant. Always replace all six seals as a set when performing a liner replacement. Keep a complete set in your parts inventory for planned rebuilds. Never reuse old seals; once compressed, they lose their ability to seal properly.
A 36-month field study on 20 XCMG GR2003 graders in a heavy mining operation compared genuine 860123040 water seals against aftermarket seals. Graders with OEM seals experienced zero coolant leaks into the oil sump over 10,000 hours, while graders with generic seals had a 30% failure rate (coolant contamination) after 4,000 hours. The OEM seals maintained flexibility and sealing pressure, while generic seals became brittle and cracked. The total cost of ownership using genuine XCMG seals was 65% lower over three years due to avoided engine tear-downs and oil changes.
Laboratory tests confirmed that the 860123040 seal’s HNBR compound retains 90% of its original compression force after 2,000 hours at 150°C, while standard NBR loses 50%. The seal’s precise cross-section (6.0 mm) ensures proper squeeze (20-25%) when the liner is pressed into the block. For graders operating in extreme cold, the seal remains flexible down to -40°C, preventing leaks during warm-up. The seal’s resistance to ethylene glycol and OAT coolants eliminates chemical degradation.
XCMG produces the 860123040 cylinder liner water seal in an IATF 16949-certified facility using compression molding and post-curing. The HNBR compound is mixed in-house and tested for rheology. The seals are molded in multi-cavity tools and then post-cured in an oven for 4 hours at 150°C to achieve optimal cross-linking. Each seal is then 100% inspected for flash, dimensional tolerances (using optical comparator), and hardness (Shore A). Random samples are subjected to compression set testing, tensile testing, and aging in coolant at 120°C for 500 hours.
All genuine 860123040 seals are individually packed in sealed plastic bags with a small amount of silicone-free lubricant. Sets of six 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 860123040 cylinder liner water seal directly replaces original XCMG part numbers 860123038 and 860123039. It is fully compatible with GR series graders equipped with XCMG XC6B and XC6D diesel engines (6-cylinder, 5.9L to 6.7L). This seal is used for all cylinder liners (wet type). For engines with different liner outer diameters (e.g., 115 mm for smaller displacement), use part 860123041. Always confirm engine model and liner dimensions before ordering.
When replacing water seals, also order new cylinder head gasket (part 860123042), liner O-rings (bottom) (part 860123043), and engine overhaul gasket set (860123044). XCMG recommends replacing all six water seals whenever the cylinder head is removed for any reason. Keep a complete engine seal kit (860123045) in your parts warehouse for planned overhauls. Provide your grader’s serial number and engine number when ordering to ensure correct seal dimensions.
Investing in the genuine 860123040 cylinder liner water seal reduces total operating costs by preventing catastrophic coolant contamination of engine oil. A single leaking water seal can cause coolant to enter the crankcase, leading to bearing failure, cylinder scoring, and complete engine replacement – costs exceeding $10,000. The OEM seal, priced competitively, eliminates that risk and provides three times the service life of aftermarket seals. Fleet managers who switched to genuine XCMG water seals reported a 99% reduction in coolant contamination failures and a 50% extension of engine overhaul intervals.
When you choose the authentic 860123040 cylinder liner water seal, you support sustainable manufacturing. XCMG uses recyclable packaging, low-waste molding processes, and non-toxic lubricants. The seal’s long service life reduces waste compared to cheap seals that need replacement every 3,000 hours. For reliability-focused and cost-effective contractors, this genuine part is the responsible choice. To order, click the Send Email or Inquiry Now buttons above. Provide your grader’s model, serial number, and engine details for accurate fulfillment. Genuine XCMG parts come with a 12-month warranty. Ensure your motor grader’s engine cooling system remains leak-free with the original XCMG 860123040 Cylinder Liner Water Seal – engineered for the most demanding diesel applications.
