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?
High frequency quenching No.40 manganese steel as rod material so
the cylinder rod has better bending resistance.
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.
Name-brand seal kits to reduce the hydraulic cylinder oil leakage
rate.
3.How long can an order delivery?
For some often used models of excavator hydraulic cylinder , we
have in stock, within 7 days .
For any order less than one container takes about 2 weeks to
finish; Order of 1-2 container takes 4 -6weeks.
At busy manufacturing season, manufacturing time needs more which
can confirm by discussion.
4.How to pay?
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.
For customized order, 70%payment as deposit ,30% balance paid to
deliver.
5.How to delivery?
If you have shipping agent ,we will cooperate with your agent to
arrange shipment .
If not , we have good relationships with shipping companies,
express suppliers.
For light goods ,by UPS/DHL/TNT(DAP terms) , For heavy goods ,by
sea (FOB,CIF,CFR)
