| Parameter | Specification |
|---|---|
| OEM Number | 860123890 |
| Brand | XCMG (Original Equipment) |
| Type | Wet-type cylinder liner (replaceable) |
| Material | Centrifugal cast alloy iron (GG25 / EN-GJL-250 equivalent) |
| Bore Diameter (finished) | 102.00 mm ±0.01 mm |
| Outside Diameter (flange) | 110.00 mm ±0.02 mm |
| Length (overall) | 215 mm ±0.10 mm |
| Flange Height | 6.00 mm ±0.05 mm |
| Surface Finish (bore) | Ra 0.4 – 0.8 μm (plateau honed) |
| Hardness | HB 220 – 250 |
| Number of Cylinders | 6 (set of 6 required for full overhaul) |
| Coolant Side | Machined water jacket ports, anti-cavitation coating |
| Sealing Rings | 3 O-rings (upper, middle, lower) – included |
| Applicable XCMG Graders | GR135, GR165, GR180, GR200, GR2003, GR215, GR260, GR300 |
The genuine 860123890 cylinder liner is produced using the centrifugal casting process, which creates a dense, uniform grain structure with exceptional strength. The alloy iron contains fine graphite flakes that provide self-lubricating properties, reducing piston ring and cylinder wear. Compared to static cast liners, centrifugal cast liners have 25% higher fatigue strength and better thermal conductivity, critical for heavy-duty motor grader applications.
Each 860123890 liner undergoes a multi-stage heat treatment to relieve residual stresses and stabilize the microstructure. The bore surface is then plateau-honed to achieve a cross-hatch pattern that retains oil for ring lubrication while providing a smooth surface for rapid break-in. This finish reduces oil consumption by up to 30% compared to conventional honing.
As a wet-type liner, the 860123890 is in direct contact with engine coolant, providing excellent heat dissipation from the combustion chamber. The outer diameter features precisely machined grooves that accept three nitrile rubber O-rings, sealing coolant and preventing leaks. The liner’s exterior is coated with a tin-based anti-cavitation layer that resists pitting caused by coolant vibration – a common failure in aftermarket liners.
The flange design ensures proper seating in the cylinder block counterbore, with a controlled protrusion of 0.05-0.10 mm above the block deck. This allows the cylinder head gasket to clamp the liner firmly, preventing combustion gas leakage. The 860123890 flange is induction-hardened to prevent deformation under high clamping loads.
In dynamometer tests, the 860123890 liner demonstrated less than 0.02 mm bore wear after 2,000 hours of full-load operation, meeting XCMG’s stringent durability targets. Field data from GR2003 graders used in mining showed liner life exceeding 15,000 hours before reaching the wear limit (0.15 mm taper). This reduces overhaul frequency by 30% compared to non-genuine liners.
The liner’s consistent roundness and straightness (≤0.01 mm) ensure optimal piston ring sealing, resulting in higher compression and lower blow-by. Engine rebuilds using genuine 860123890 liners typically see a 5% improvement in fuel economy and reduced oil consumption (less than 0.1% of fuel consumption).
Before installing the 860123890 cylinder liner, thoroughly clean the cylinder block bore and counterbore. Check liner protrusion using a dial gauge – acceptable range 0.05-0.10 mm. Lubricate the O-rings with clean engine oil and install them into the liner grooves. Insert the liner into the block using a suitable press tool, ensuring it seats fully. Never hammer directly on the liner.
After installation, measure the liner bore for roundness and taper. Honing is not required as the liner comes pre-finished. However, if piston rings are replaced, lightly deglaze the bore with a flexible hone (320 grit) for 10 seconds. Always use new O-rings and never reuse old ones. Torque cylinder head bolts according to engine manual after liner installation.
Counterfeit cylinder liners often use inferior gray iron with poor graphite distribution, leading to rapid scuffing and seizure. They may also have incorrect flange height or bore geometry, causing head gasket failure or piston ring breakage. Genuine 860123890 liners are manufactured in an IATF 16949 certified foundry, with 100% non-destructive testing (NDT) for cracks and porosity.
Each liner is serialized and traceable to its heat lot. XCMG liners also include a corrosion-resistant coating on the water jacket side, extending coolant-side life. Using OEM parts ensures warranty compliance and access to technical support. Don’t risk a catastrophic engine failure – choose genuine 860123890.
Centrifugal cast iron, HB 220-250, 25% stronger than static cast.
Ra 0.4-0.8μm surface for rapid ring break-in.
Tin coating resists pitting from coolant vibration.
Symptoms of worn cylinder liners include excessive oil consumption, blue exhaust smoke, blow-by (crankcase pressure), and loss of compression. To diagnose, perform a cylinder leakage test – more than 20% leakage indicates worn bore or rings. Measure the liner bore for taper and out-of-round using an inside micrometer. Service limit for taper is 0.10 mm; out-of-round 0.05 mm.
If coolant is found in the oil, suspect cracked liner or failed O-rings. Pressure test the cooling system to locate leaks. When replacing the 860123890 liner, always replace all six liners as a set to maintain consistent compression across cylinders. Also install new piston rings, connecting rod bearings, and head gasket for a complete overhaul.
Store spare liners in their original boxes, upright, in a clean, dry area. Do not stack heavy objects on them. Shelf life is unlimited if protected from rust. Before installation, inspect for any shipping damage or corrosion. The 860123890 liner is compatible with standard diesel engine coolants; use a 50/50 ethylene glycol mixture for optimal corrosion protection.
XCMG’s global parts network stocks the 860123890 cylinder liner in regional warehouses across North America, Europe, Asia, Middle East, and Africa. Typical lead time: 3-5 business days for air freight. Bulk orders (12+ pieces, i.e., two engine sets) qualify for sea freight discounts and custom palletization.
For fleet customers, we offer core exchange programs and consignment stock. Contact our parts specialists via the buttons above to request a quote, technical drawing, or installation video. We also provide torque specifications, honing guidelines, and O-ring part numbers for complete engine rebuilding.
*All specifications based on XCMG original equipment standards. Always replace liners as a full set. OEM number 860123890 is a registered XCMG component. Images are representative; actual product may vary.
For any inquiries regarding the 860123890 XCMG Cylinder Liner or other motor grader engine components, contact our team via the “Send Email” or “Inquiry Now” buttons above. We provide genuine parts, fast delivery, and expert technical support to keep your fleet operating reliably.
