6204-31-4520 flywheel, Excavator B3.3 diesel engine flywheel parts
The 6204-31-4520B3.3 flywheel is primarily used in diesel engine crankshaft drive systems. By storing and releasing rotational inertia, it makes engine operation smoother, while providing a stable power connection for the starting and transmission systems. This flywheel is made of high-strength metal materials, featuring a robust structure and excellent dynamic balance, effectively reducing vibration and impact. It is suitable for the long-term stable operation of engineering machinery and industrial power equipment.
| Part Number |
6204-31-4520 |
| Type |
Engine flywheel |
| Function |
Stabilizes speed and transmits engine power |
| Material |
High-strength cast steel or alloy steel |
| Application |
B3.3 and other diesel engines |
| We supply a complete range of excavator engine assemblies and excavator parts |
| FOR ISUZU |
4HG1 4BD1 4HE1T 4HG1T 4JJ1 4JB1 4HF1 4HL1 4LE1 4LE2 4JG1 6HK1 6BG1 6HK1 6WG1 |
| FOR YANMAR |
2TNV70 3TNV70 3TNV74 3TNV76 3TNM68 3TNV80 3TNM72 3TNM74 3TNV84 3TNV86 3TNV88 4TNV84 4TNV86 4TNV88 4TNE92 4TNE94 4TNV98 4TNE98 4TNV106 |
| FOR KUBOTA |
Z482 D772 D782 D902 D1005 D1105 D1305 V1305 V1505 D1703 D1803 V2003 V2203 V2403 V2607 V3300 V3307 V3600 V3800 |
| FOR CAT |
C1.1 C2.2 C2.4 C2.6 C3.3 C4.2 C4.4DI C4.4EFI C6.4 C6.6 C7 C7.1 C9 C11 C13 C15 C18 3066 3116 3126 3176 |
| FOR PERKINS |
403D-11 403D-15 404D-22 404EA-22T 3054 1104C-44 1104C-44TA 1104D-44 1104D-44T 1104D-44TA 1104-E44T 1104D-E44TA 1106D-E66T 1106D-70TA 1106D-E70TA 1206F-E70TTA |
| FOR Other |
B3.3 ISF3.8 4BT3.9 B4.5 QSB5.9 QSB6.7 6CT8.3 6D107-1 6D107-2 6BT5.9 6LT8.9 QSL9 6LT9.3 NT855 M11 X12 X15 |
Features and Advantages
• Stable moment of inertia: Effectively balances engine operation and reduces speed fluctuations.
• Robust and durable structure: Made of high-strength materials, impact-resistant and wear-resistant.
• Good dynamic balance performance: Reduces vibration and noise, improves overall machine stability.
• High compatibility: Meets OEM technical standards and can directly replace the same model flywheel.





Frequently Asked Questions
Q1: What is your main products?
A1: We are specialized in the excavator engine spare parts, for example Main cylinder block, cylinder head, crankshaft, Engine assembly, piston, cylinder liner, piston ring, camshaft, connecting rod, oil pump, water pump, valve series products, movement, etc. almost all parts of the entire engine.
Q2: If I only know the excavator model, but can not offer parts No., what should I do?
A2: If possible, you can send us pictures of old products, name plate or the size for reference.
Q3: Can you accept sample order?
A3: Yes sure. We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.
Q4: Do you test all your goods before delivery?
A4: Yes, we have 100% test before delivery.
Q5: How can I do if there is something wrong with the items?
A5: Our products have been professionally tested and the quality is very stable. If you really found something wrong, please contacts. We have a professional after-sales team to help you solve the problem.