Reliable engine performance starts with precision-engineered components. For fleet managers and mechanical workshops handling Komatsu 12V140 heavy-duty engines, securing a high-quality 4309331 cylinder liner is critical for avoiding unplanned downtime. Whether you are performing a mid-life refresh or a complete engine overhaul, our 4309331 liners meet OEM standard replacement specifications to ensure perfect cylinder compression and heat dissipation.
Detailed data for procurement verification. Please cross-reference your 4309331 part number with the machine model below.
| Specification Item | Details / Value |
|---|---|
| Model NO. | Komatsu 12V140 Series |
| Product Name | Cylinder Liner (Wet Sleeve) |
| Part Number | 4309331 |
| Type | Engine Internal Combustion Components |
| Condition | Brand New, OEM Standard Replacement |
| MOQ | 1 Piece |
| Stock Status | In Stock / Fast Dispatch |
| Application | Engine rebuild, overhaul, maintenance for D475A-3, D475A-5 dozers |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | Express: DHL Fedex EMS UPS or by Air/ Sea |
| Packaging | Industrial Export Packing |
Why professional repair shops choose our 4309331 replacement over generic alternatives.
| Core Evaluation Factor | Standard Replacement (Our Quality) | Low-Cost Market Generic |
|---|---|---|
| 1. Material Composition | High-phosphorus cast iron for wear resistance | Basic gray iron (shorter lifespan) |
| 2. Dimensional Accuracy | Strict tolerance for 12V140 block fitment | Variable tolerances (risk of coolant leaks) |
| 3. Surface Finish | Plateau honed for optimal oil retention | Rough finish (increased piston ring wear) |
| 4. Heat Treatment | Induction hardened inner wall | Non-hardened or inconsistent hardening |
| 5. Flange Strength | Reinforced design to prevent cracking | Thin flange (prone to stress failure) |
| 6. Warranty / Support | Full technical support & fitment guarantee | No after-sales support |
Need a quote or technical verification for part number 4309331?
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Common Issue: Why is my Komatsu 12V140 engine experiencing coolant in the oil?
This is often caused by cavitation erosion on the outer wall of the 4309331 cylinder liner. Over time, vibrations create tiny vacuum bubbles in the coolant that implode against the liner, eventually pitting through the metal. Replacing the sleeve with a high-quality OEM standard tri-metal structure liner and maintaining correct coolant chemistry is the only permanent fix.
Question: Why Choose This Cylinder Liner?
Answer: Our liners utilize an OEM-standard tri-metal structure and are trusted by repair shops & equipment fleets globally for their high-tolerance machining and durability in extreme environments.
Not sure how this issue affects your equipment? Our team helps operators:
Identify potential risks during maintenance
Recommend suitable replacement parts if needed
Support both inspection advice and parts supply
We provide comprehensive engine rebuild kit price evaluations and Komatsu 12V140 overhaul parts supplier services to keep your machinery moving.
We specialize in heavy-duty engine solutions, focusing on cummins, komatsu, Caterpillar, isuzu, kubota, yanmar, and weichai. Our inventory covers everything from engine assembly to internal components.
Our core product line includes: cylinder liner, piston, piston ring, main bearing, con-rod bearing, thrust washer, overhaul gasket kit, diesel fuel pump, fuel injector, crankshaft, turbocharger, water pump, oil pump, cylinder block, cylinder head, and connecting rod.
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