31M8-51120 Excavator Hydraulic Arm Cylinder for R55-7 Hyundai Parts
Product Description
| Product Name | Excavator Hydraulic Arm Cylinder |
| Model | R55-7 |
| Part Number | 31M8-51120 |
| Temperature Range | -20-80°C |
| Max Operating Pressure | 35MPA |
| OEM | Yes |
| Certification | ISO9001 |
| Material | Cylinder Tube 25Mn Piston Rod CK45 |
| Application | For Hyundai Hydraulic Cylinder |
Product Display
Why choose us
Expertise
With over a decade of experience, we specialize in hydraulic cylinders and excavator parts, ensuring you get reliable solutions every time.
Uncompromising Quality
We use only premium materials and precise manufacturing, guaranteeing durable, high-performance parts for your machinery.
Fast, Reliable Delivery
Our efficient logistics ensure quick delivery, minimizing downtime and keeping your operations running smoothly.
Custom Solutions
Need something unique? We offer tailored parts to meet your exact requirements, designed for optimal performance.
Exceptional Support
From consultation to after-sales service, our dedicated team is always ready to provide expert advice and assistance.
After-sale service
We offer comprehensive after-sales service to ensure your satisfaction. From timely shipment tracking and delivery updates to quality checks during use,were always here to address any concerns and provide support. Your trust is our priority!
List of spare parts
| Pos. | Part No. | Qty | Part Name | Comments |
| *. | 31M8-51120 | 1 | ARM CYLINDER | |
| 1 | 31Y1-22891 | 1 | TUBE ASSY | |
| 2 | 31Y1-22350 | 1 | ROD ASSY | |
| 3 | 31Y1-16401 | 1 | GLAND | |
| 4 | S732-055030 | 1 | DD2 BUSH | |
| K5. | Y200-055011 | 1 | SEAL-ROD | |
| K6. | Y180-055020 | 1 | RING-BACKUP | |
| K7. | Y240-055011 | 1 | RING-BUFFER | |
| K8. | Y110-055011 | 1 | WIPER-DUST | |
| 9 | Y190-069000 | 1 | RING-SNAP | |
| 10 | S632-090001 | 1 | O-RING | |
| 11 | S632-085004 | 2 | O-RING | |
| 12 | S642-085002 | 1 | RING-BACKUP | |
| 13 | S642-085003 | 2 | RING-BACK UP | |
| 14 | 31YC-25020 | 1 | RING-CUSHION | |
| 15 | 31Y1-24340 | 1 | PISTON | |
| K16. | S632-040004 | 1 | O-RING | |
| K17. | S642-040003 | 2 | RING-BACK UP | |
| K18. | Y450-090000 | 1 | SEAL-PISTON | |
| K19. | Y300-090100 | 1 | RING-WEAR | |
| K20. | Y440-090000 | 1 | RING-DUST | |
| 21 | 31YC-65290 | 1 | NUT-NYLON | |
| 22 | 31YC-2A040 | 1 | VALVE-CHECK | |
| 23 | 31YC-99070 | 1 | SPRING-COIL | |
| K24. | S631-014004 | 1 | O-RING | |
| 25 | P220-110103 | 1 | PLUG-HEX | |
| 26 | 31Y1-22911 | 1 | PIPE ASSY-R | |
| K27. | Y171-015004 | 1 | O-RING | |
| 28 | S107-080404 | 4 | BOLT-SOCKET | |
| 29 | S071-022230 | 1 | U-BOLT | |
| 30 | S201-101002 | 2 | NUT-HEX | |
| 31 | S411-100002 | 2 | WASHER-SPRING | |
| 32 | 31YC-12020 | 2 | BUSHING-PIN | |
| K33. | Y010-050060 | 4 | SEAL-DUST | |
| 34 | S651-810002 | 1 | NIPPLE-GREASE | |
Company Information
GuangZhou GuoLi Engineering Machinery Co., Ltd., with over 16 years of experience in excavator hydraulic cylinders, is a foreign trade company specializing in a wide range of products, including crawler excavator arm cylinders, boom cylinders, bucket cylinders, cylinder tubes, cylinder rods, custom hydraulic cylinders, seal kits, hydraulic pumps, and electric parts, all designed for various excavator models. Our products have been exported to over 100 countries and regions worldwide.
Factory Tour
Our main product, excavator cylinders, is produced through a complete hydraulic cylinder production line, from design to manufacturing. With over ten years of experience, we’ve upgraded our offerings to multi-stage hydraulic cylinders. We focus on cylinder customization and produce a variety of domestic and imported excavator cylinders. Using advanced CNC lathes, grinders, and assembly equipment, we strictly follow ISO quality standards throughout production.
Piston Rod Production Process
Piston rods are made from tempered steel, induction hardened before chrome plating to prevent bending and scratching. They resist rust for over 100 hours in salt spray tests. Produced and electroplated in-house with mirror finish technology.
Automatic Welding Process
The welds are done fully automated for consistency and integrity. With lean welding craft for creating the strong joint strength and eliminating the defect.We adopt the automatic welding process, and the good weld seam can match the appearance of the original parts, and the welded parts are not easy to fall off.
Finished Product Warehouse Display
Exhibition Showcase
Our Presence at Major Exhibitions: 2023 Malaysia & 2024 Shanghai Bauma
Exhibition With Cooperated Clients
Certificates
Certification
FAQ
1.How can I be sure the part will fit my excavator ?
2.What material do you use on hydraulic cylinder?
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High frequency quenching No.40 manganese steel as rod material so the cylinder rod has better bending resistance.
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No.25 manganese steel as tube material ,so the tube has better wear resistance,
High-strength hardened steel as rod head and tube head ,so the cylinder head and rod head more durable.
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Name-brand seal kits to reduce the hydraulic cylinder oil leakage rate.
3.How long can an order delivery?
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For some often used models of excavator hydraulic cylinder , we have in stock, within 7 days .
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For any order less than one container takes about 2 weeks to finish; Order of 1-2 container takes 4 -6weeks.
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At busy manufacturing season, manufacturing time needs more which can confirm by discussion.
4.How to pay?
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Order less than 3000USD, full payment at order, Order over USD3000 value ,50% deposited in to start,
50% balance paid to deliver,inspection service accepted.
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For customized order, 70%payment as deposit ,30% balance paid to deliver.
5.How to delivery?
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If you have shipping agent ,we will cooperate with your agent to arrange shipment .
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If not , we have good relationships with shipping companies, express suppliers.
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For light goods ,by UPS/DHL/TNT(DAP terms) , For heavy goods ,by sea (FOB,CIF,CFR)
Product Tags:
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31M8-51120 Excavator Arm Cylinder For R55-7 Hyundai Parts ISO9001 Approval Images
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