Premium B3.3 Excavator Engine Overhaul Kit – the professional heavy-duty solution for restoring peak performance, reliability, and durability to your Komatsu B3.3 engine. Specifically engineered to meet the rigorous demands of construction, excavation, mining, and earthmoving applications.
This comprehensive overhaul kit is crafted with high-grade metal and precision components that meet or exceed OEM standards, ensuring seamless compatibility with Komatsu B3.3 engines. Designed to address common engine issues such as compression loss, oil leaks, low power output, and wear.
Compatible with Komatsu engine models B3.3, B3.3E, S4Q2, and S4Q2E, as well as Komatsu equipment including excavators (PC60-7, PC70-7, PC78US-6, PC80-7, PC110-7), skid steer loaders (SK714, SK716), mini excavators (PC30MR-2, PC40MR-2), and compact track loaders (CT160-1).
| Component Name | OEM Part Number | Quantity | Material | Compatibility |
|---|---|---|---|---|
| Overhaul Gasket Set | 3939805, 3939806 | 1 Set (Upper + Lower) | Heat-Resistant Reinforced Rubber & High-Density Fiber | B3.3, B3.3E, S4Q2 Series Engines |
| Main Bearing Set (Standard Size) | 3939803 | 1 Set (4 Pcs) | High-Strength Alloy Steel with Anti-Wear Coating | B3.3, B3.3E, S4Q2 Series Engines |
| Connecting Rod Bearing Set (Standard Size) | 3939804 | 1 Set (4 Pcs) | Chrome-Plated Alloy Steel for Heavy-Duty Loads | B3.3, B3.3E, S4Q2 Series Engines |
| Piston Set (Standard Size) | 3939807 | 4 Pcs | High-Quality Aluminum Alloy with Heat-Dissipating Coating | B3.3, B3.3E, S4Q2 Series Engines |
| Thrust Bearing | 3939808 | 1 Set | Alloy Steel with Self-Lubricating Layer | B3.3, B3.3E, S4Q2 Series Engines |
| Intake & Exhaust Valves | 3939809 (Intake), 3939810 (Exhaust) | 4 Pcs Each (8 Total) | Heat-Resistant Steel with Hard Chrome Plating | B3.3, B3.3E, S4Q2 Series Engines |
| Valve Guides & Seats | 3939811 (Guides), 3939812 (Intake/Exhaust Seats) | 4 Sets Each | Cast Iron & Bronze Alloy for High-Temperature Resistance | B3.3, B3.3E, S4Q2 Series Engines |
| Connecting Rod Bushing | 3939813 | 4 Pcs | High-Strength Alloy Steel with Precision Machining | B3.3, B3.3E, S4Q2 Series Engines |
We prioritize quality and compatibility, with each component undergoing rigorous inspection and testing to meet OEM standards. Our kit offers a cost-effective alternative to genuine Komatsu parts without compromising on quality, helping you reduce maintenance costs while extending the service life of your heavy-duty equipment.
