ranroswang@hksparkling.com 
+86 138 2341 8469
Brand New 4067720 Structural Linkage Bushing for Hitachi EX270, EX300, EX300-3
The 4067720 High-Strength Structural Bronze/Steel Alloy Journal Bushing is a high-reliability wear protection and mechanical pivot joint component engineered specifically for Hitachi medium and large-scale crawler excavators.
This bushing is installed directly into high-stress linkage articulation points—such as the boom foot, boom-to-arm connection, or arm-to-bucket joints—acting as a renewable sacrificial wear sleeve that prevents destructive steel-on-steel friction between structural pins and excavator castings.
Overview
Thank you for choosing SPARKLING MACHINERY.
The SPARKLING Brand New Structural Linkage Bushing (compatible with Hitachi part number 4067720) is a precision-engineered replacement designed to restore linkage integrity, reduce wear, and extend service life on excavators. Engineered for strength, dimensional accuracy, and reliable field performance, this bushing is an ideal choice for maintenance shops and fleet operators seeking OEM-fit quality at competitive pricing.
The SPARKLING MACHINERY NEW 4067720 BUSHING Photo:
Key Features & Benefits
- Exact-fit Compatibility: Manufactured to match Hitachi 4067720 specifications for a direct replacement with no modification required, ensuring correct fit and function across compatible Hitachi excavator linkages.
- Durable Materials & Heat Treatment: Produced from High Quality alloy steel and subjected to controlled heat treatment and surface hardening to resist abrasion and deformation under heavy loads.
- Precision Machining & Tight Tolerances: CNC-turned and ground to tight dimensional tolerances for consistent clearance, smooth articulation, and reduced play in linkage joints.
- Corrosion & Wear Protection: Finished with a protective coating to reduce corrosion and improve long-term wear resistance in harsh jobsite environments.
- Reduced Downtime & Lower Life-Cycle Cost: Enhanced durability and consistent performance minimize unscheduled repairs and component replacements, lowering operating costs over time.
- Easy Installation & Inspection-Friendly: Standard geometry and consistent quality simplify installation and visual inspection during routine maintenance.
Why Choose SPARKLING
Founded in 2013, SPARKLING MACHINERY focuses on high-quality excavator parts backed by strict manufacturing and quality control. We supply components compatible with leading brands including Hitachi, Caterpillar, Komatsu, and Volvo. Our global sales network, experienced technical support, and ability to provide customized solutions make us a trusted partner for workshops and fleet managers. All parts are inspected before shipment to ensure reliable performance under varied working conditions.
Technical & Support
- Part number: 4067720 (Hitachi compatible)
- Condition: Brand New
- Material: High Quality alloy steel, heat-treated
- Finish: Anti-corrosion protective coating
For detailed specifications, model compatibility, lead times, or bulk pricing, contact our technical sales team.
Buy with confidence—SPARKLING delivers dependable excavator parts engineered for stability, precision, and long-lasting performance.
FAQ
What are the primary warning signs that an excavator's pin bushings are worn out?
Common warning signs include visible "slop" or mechanical play in the joints when shaking the empty bucket, loud metallic popping or creaking sounds during digging cycles, rapid grease leakage out of the sides of the joints, or an uneven bucket wear pattern caused by the entire arm twisting out of alignment.
What is the risk of operating an excavator with worn out 4067720 bushings?
Ignoring worn bushings will quickly ruin the main excavator boom or arm structure. Once the sacrificial bushing wall wears completely through, the rotating steel pin will begin grinding directly against the inner wall of the structural boss casting. This stretches the round hole into an oval shape, requiring expensive field line-boring and welding repairs to correct.
What critical step must be taken when pressing in a new replacement bushing?
Always thoroughly clean the housing boss and line up the internal grease hole on the bushing with the grease zerk port on the machine frame before pressing. If the grease channels are misaligned, lubricant will be completely blocked from entering the joint, leading to rapid frictional overheating and premature part destruction within a few hours of operation. Cool the bushing in a deep freeze or dry ice prior to installation to contract the metal for a much smoother press fit.
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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