<p>Get your heavy equipment back to peak performance with this Cummins B3.3 overhaul kit, designed to eliminate costly downtime and restore engine reliability. Compatible with B3.3 and QSB3.3 engines, this comprehensive rebuild solution includes precision-machined piston 4944477 and all critical components needed for a complete overhaul.</p><ul><li>Includes semi-finished cylinder liners for optimal fit and long-term durability</li><li>OEM-equivalent quality ensures seamless installation and extended service life</li><li>All necessary gaskets, bearings, and valves included for a hassle-free repair process</li></ul>
| Parameter | Details |
|---|---|
| Part Name | Engine Overhaul Rebuild Kit |
| Part Number | 4944477 |
| Compatible Engine Brand | Cummins |
| Engine Models | B3.3, QSB3.3 |
| Content | Overhaul Gasket Kit, Cylinder Liners (Semi-finished), Pistons (Standard), Piston Pins, Snap Rings, Rod Bushings, Piston Rings (Standard), Main Bearings, Con Rod Bearings, Thrust Washer, Intake/Exhaust Valves, Valve Guides, Intake/Exhaust Valve Seats |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Brand | Applicable Models |
|---|---|
| Cummins | B3.3, QSB3.3 |
Heavy equipment operators know the cost of engine failure—$3,000 to $5,000 per day in lost productivity. Waiting 2–4 weeks for OEM parts or risking counterfeit kits that fail prematurely only makes the problem worse. When your Cummins B3.3 or QSB3.3 engine needs a rebuild, you need a solution that combines reliability, speed, and technical accuracy.
Our Cummins B3.3 overhaul kit delivers the performance you expect from original parts, without the 30–50% price markup or extended lead times. As a 10-year global supplier with 20+ engineering experts, we source exclusively from ISO-certified factories and test every kit before shipment. Whether you’re repairing a construction excavator, agricultural machine, or mining equipment, this rebuild kit ensures your engine returns to peak operating condition.
This QSB3.3 rebuild kit is engineered for the toughest environments—from construction sites and quarries to port operations and agricultural fields. The components handle high-pressure combustion cycles, extreme temperatures, and continuous heavy loads, making it ideal for machinery with 10,000+ operating hours needing a comprehensive overhaul. Properly installed, it restores compression, reduces oil consumption, and extends engine lifespan by 3–5 years.
Every part in this engine rebuild kit meets critical tolerances: The 4944477 pistons feature heat-treated aluminum alloy construction to resist warping under thermal stress, while the cylinder liners (semi-finished) ensure exact bore dimensions for optimal piston ring seal. Main and con rod bearings use lead-free tri-metal material for reduced friction and improved load distribution. Valve seats are precision-machined to match OEM angles, preventing exhaust gas leakage and maintaining proper compression ratios.
Choosing an uncertified overhaul kit may save 10–15% upfront, but the consequences are costly. Counterfeit piston rings often fail within 500 operating hours, causing blow-by and oil contamination. Substandard gaskets lead to coolant leaks and overheating. With our heavy equipment repair kit, you avoid these risks: each component undergoes material hardness testing and dimensional inspection, ensuring OEM-equivalent durability. The result? Lower total cost of ownership through reduced downtime and fewer repeat repairs.
We’ve earned the trust of 120+ countries by focusing on reliability: All parts are sourced from ISO 9001-certified factories with strict incoming material inspection. Each overhaul kit undergoes pre-shipment performance testing to verify fit and function. Our technical team provides 2-hour part verification to ensure compatibility with your specific engine model. With 10,000+ parts in stock at our Guangzhou warehouse, we ship in-stock items within 2–5 working days—critical for minimizing equipment downtime.
Every day your equipment sits idle costs money. Our Cummins B3.3 QSB3.3 engine overhaul kit is ready to ship, with technical support available 24/7 to answer installation questions. Send us your engine model, serial number, and required quantity today—we’ll provide a competitive quote within 24 hours. First-time customers can request sample testing to verify quality before full order placement.
Q: Is this an OEM part or aftermarket?
A: This is an OEM-equivalent aftermarket kit, manufactured by ISO-certified factories to match original specifications.
Q: How do I confirm compatibility with my engine?
A: Provide your engine model, serial number, and part number (if available) — our technical team will verify compatibility within 2 hours.
Q: What is the warranty coverage?
A: We offer a 3–12 month warranty against manufacturing defects, with free replacement for any components found faulty during normal use.
Q: What is the minimum order quantity?
A: We accept orders for 1 piece, ideal for emergency repair situations.
Q: How long does shipping take?
A: In-stock kits ship within 2–5 working days. Express shipping takes 3–5 days globally; air freight 7–10 days; sea freight 25–40 days depending on destination.
Q: Can I test a sample before ordering in bulk?
A: Yes, first-time clients can request sample testing to verify quality and compatibility before placing large orders.
Ready to order or need a quote?
Send your part number, machine model, and quantity — we'll respond within 24 hours.
WhatsApp: +86 13316055942 | Email: talos@xunpojx.com
Send us your requirements -- part number, machine model, quantity, and destination. Our team responds within 24 hours with a competitive quote.
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