ranroswang@hksparkling.com 
+86 138 2341 8469
SA7116-12100 Rear Sun Gear for Doosan DX225LC DX255LC DX300LC Crawler Excavator | Final Drive Parts
The SA7116-12100 Sun Gear (Rear) is the central component of the planetary reduction system in Doosan Crawler Excavators. It transmits high torque from the hydraulic motor to the planetary gears, enabling the powerful movement required for heavy-duty digging and traveling.
Dear Valued Partners,
Thank you for choosing SPARKLING MACHINERY, your professional supplier for construction machinery brake and transmission parts.
We are proud to present the SA7116-12100 Rear Sun Gear, designed specifically for Doosan DX225LC, DX255LC, and DX300LC crawler excavators. As a key part of the final drive planetary gearbox, it directly affects machine mobility, efficiency, and reliability.
The SPARKLING MACHINERY NEW SA7116-12100 Sun Gear Rear Photo:
Key Advantages
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- Material: High‑strength alloy steel (20CrMnTi or equivalent)
- Heat Treatment: Carburizing, quenching, and tempering
- Hardness: Surface HRC 58–62, core with high toughness
- Machining: CNC hobbing + precision gear grinding
- Quality: 100% dimension & hardness inspection
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DX Wheeled Excavator Compatible Parts Table:
| Part Name | Machine Model | Part Number |
| Sun Gear (Rear) | DX225LC / DX300LC | SA7116-12100 |
| Planetary Gear | DX225LC / DX300LC | SA7116-12110 |
| Needle Roller Bearing | DX225LC / DX300LC | K9000551 |
| Floating Seal Group | DX225LC / DX300LC | 1.101-00045 |
| Drive Shaft | DX225LC / DX300LC | SA7116-12120 |
Q&A
Q1: Is this SA7116-12100 gear made of forged or cast steel?
A: We use high-grade forged alloy steel (20CrMnTi), which offers superior strength and fatigue resistance compared to cast alternatives, ensuring it handles the high torque of the DX300LC.
Q2: Does this sun gear come with a warranty?
A: Yes, HK Sparkling provides a quality guarantee on all gear components. If installed correctly in a clean system, our gears are built to match OEM service intervals.
Q3: Can you ship this part urgently for a machine-down situation?
A: Absolutely. We keep SA7116-12100 in stock and can arrange express air shipping (DHL/FedEx/UPS) to get your Doosan excavator back to work within days.
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📦 Packing
1. Packaging methods: Carton box + Wooden case/Pallet + Anti-rust treatment
2. Export-standard packaging to ensure safety during transportation
3. Custom packaging available upon request
4. Dimensions and weight can be provided for freight calculation
🚚 Shipping
1. Available shipping methods: Sea freight, Air freight, Express delivery (DHL, UPS, FedEx, etc.)
2. LCL (Less than Container Load) and FCL (Full Container Load) options are supported
3. For Russian clients, we can introduce the forwarder agent to you
4. Delivery time: Ships within 1-3 working days after payment (for items in stock)
💳 Payment
1. Accepted methods: T/T, Bank Transfer, PayPal, Alipay, WeChat Pay, Western Union
2. Deposit + balance payment available for large or custom orders
3. Flexible payment options—feel free to contact us for details
📌 Frequently Asked Questions (FAQs)
Q: Which excavator models is this part compatible with?
A: This product is compatible with major brands such as CAT, KOMATSU, HITACHI, and more. Custom specifications are also available.
Q: How can I make sure I’m selecting the correct part?
A: You can send us a photo of the old part, part number, or your excavator model, and we will help you confirm the right match.
Q: Is there a warranty for this product?
A: Yes, we offer a 6-month quality guarantee under normal use.
Get a free quote
We are committed to producing the highest quality products at the most competitive prices. Therefore, we sincerely invite all interested companies to contact us for more information.
Contact us
Email: ranroswang@hksparkling.com
Wechat: +86 136 0901 0879
Skype: foreverlucia1
WhatsApp: +86 136 0901 0879
Address: No. 514-515, Hulin Road, Tianhe District, Guangzhou, China.
Sparkling Machinery Co.,Ltd
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Whatsapp: +8613609010879