Guangzhou Guoli Engineering Machinery Co., Ltd.
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Boom Excavator Hydraulic Cylinder R290LC-7 31Q8-50110 31N8-50121 31N8-50111 Hyundai Parts
Product Description
| Product Name | Boom Excavator Hydraulic Cylinder |
| Model | R290-7 R290LC-7 |
| Part Number | 31Q8-50120 31Q8-50110 31N8-50121 31N8-50111 |
| Dimensions | Customized |
| OEM | Yes |
List Of Hydraulic Cylinder Spare Parts
31Q8-50110
| Pos. | Part No | Part Name |
| * | 31Q8-50110 | BOOM CYLINDER ASSY-LH |
| * | 31Q8-50120 | BOOM CYLINDER ASSY-RH |
| *-1 | 31Y1-29830 | BOOM CYL SUB ASSY |
| 1 | 31Y1-29840 | TUBE ASSY |
| 2 | 31Y1-29890 | ROD ASSY |
| 3 | 31Y1-29920 | GLAND |
| 4 | S732-100040 | BUSHING-DD2 |
| 5 | Y191-107000 | RING-SNAP |
| K6 | Y220-100013 | SEAL-ROD |
| K7 | Y180-100020 | RING-BACK UP |
| K8 | Y240-100012 | RING-BUFFER |
| K9 | Y110-100011 | WIPER-DUST |
| 10 | Y190-114000 | RING-SNAP |
| K11 | S631-130004 | O-RING |
| K12 | 31YC-BP130 | RING-BACK UP |
| 13 | 31YC-26015 | RING-CUSHION |
| 14 | 31Y1-28771 | PISTON |
| K15 | Y420-140000 | SEAL-PISTON |
| K16 | Y310-140103 | RING-WEAR |
| K17 | Y440-140202 | RING-DUST |
| K18 | S632-075004 | O-RING |
| K19 | S642-075003 | RING-BACK UP |
| 20 | 31YC-68050 | NUT-LOCK |
| 21 | S114-100164 | SCREW-SET |
| 22 | S109-180854 | BOLT-SOCKET |
| 23 | 31YC-15060 | BUSHING-PIN |
| 23 | 61Q6-97610 | BUSHING-PIN |
| 24 | 31YC-15040 | BUSHING-PIN |
| 24 | 61Q6-97410 | BUSHING-PIN |
| 24 | 61QH-96310 | BUSHING-PIN |
| 25 | Y020-100100 | SEAL-DUST,DLI,KPU |
| 26 | Y020-090100 | SEAL-DUST,DLI,KPU |
| K32 | S632-140004 | O-RING |
| 27 | 31Y1-30870 | BAND ASSY |
| 27 | 31Y1-30871 | BAND ASSY |
| 27-1 | 31Y1-30880 | BAND SUB ASSY |
| 27-2 | 31YC-32100 | BAND |
| 27-3 | S015-120452 | BOLT-HEX |
| 27-4 | S411-120002 | WASHER-SPRING |
| 27-5 | S070-053442 | U-BOLT |
| 27-6 | S205-101002 | NUT-HEX |
| 27-7 | S411-100002 | WASHER-SPRING |
| 28 | 31Y1-30930 | PIPE ASSY-R,LH |
| 28 | 31Y1-30931 | PIPE ASSY-R,LH |
| 28 | 31Y1-30940 | PIPE ASSY-R,RH |
| 28 | 31Y1-30941 | PIPE ASSY-R,RH |
| 29 | 31Y1-15371 | PIPE ASSY-B,LH |
| 29 | 31Y1-15372 | PIPE ASSY-B,LH |
| 29 | 31Y1-15381 | PIPE ASSY-B,RH |
| 29 | 31Y1-15382 | PIPE ASSY-B,RH |
| K30 | Y171-024004 | O-RING |
| 31 | S107-120554 | BOLT-SOCKET |
| 31 | S107-120556 | BOLT-SOCKET |
| K | 31Y1-29930 | SEAL |
31N8-50121 31N8-50111
| Pos. | Part No | Part Name |
| * | 31N8-50121 | BOOM CYLINDER-LH |
| * | 31N8-50111 | BOOM CYLINDER-RH |
| * | 31N8-52120 | BOOM CYLINDER-LH |
| * | 31N8-52121 | BOOM CYLINDER-LH |
| * | 31N8-52110 | BOOM CYLINDER-RH |
| * | 31N8-52111 | BOOM CYLINDER-LH |
| *-1 | 31Y1-15241 | BOOM CYLINDER SUB |
| 1 | 31Y1-15251 | TUBE ASSY |
| 2 | 31Y1-15290 | ROD ASSY |
| 3 | 31Y1-15320 | GLAND |
| 4 | S732-100040 | BUSHING-DD2 |
| 5 | Y191-107000 | RING-SNAP |
| K6 | Y220-100011 | SEAL-ROD,IUH |
| K7 | Y180-100020 | RING-BACK UP |
| K8 | Y240-100013 | RING-BUFFER |
| K9 | Y110-100011 | WIPER-DUST |
| 10 | Y190-114000 | RING-SNAP |
| K11 | S631-130004 | O-RING |
| K12 | S641-130003 | RING-BACK UP |
| 13 | 31YC-23040 | RING-CUSHION |
| 14 | 31Y1-15160 | PISTON |
| K15 | S632-085004 | O-RING |
| K16 | S642-085003 | RING-BACK UP |
| K17 | Y420-140000 | SEAL-PISTON |
| K18 | Y310-140000 | RING-WEAR |
| K19 | Y440-140000 | RING-DUST |
| 20 | 31YC-66060 | WASHER-LOCK |
| 21 | 31YC-61132 | NUT-LOCK |
| 22 | S109-180902 | BOLT-SOCKET |
| 29 | 31YC-11405 | BUSHING |
| 30 | 31YC-11155 | BUSHING-PIN |
| 31 | Y000-100100 | SEAL |
| 32 | Y000-090000 | SEAL-DUST |
| 23 | 31Y1-15330 | BAND ASSY |
| 23-1 | 31Y1-15340 | BAND SUB ASSY |
| 23-2 | 31YC-32100 | BAND |
| 23-3 | S015-120452 | BOLT-HEX |
| 23-4 | S411-120002 | WASHER-SPRING |
| 23-5 | S071-023430 | U-BOLT |
| 23-6 | S201-101002 | NUT-HEX |
| 23-7 | S411-100002 | WASHER-SPRING |
| 24 | 31Y1-15350 | PIPE ASSY-R,LH |
| 24 | 31Y1-15360 | PIPE ASSY-R,RH |
| 25 | 31Y1-15371 | PIPE ASSY-B,LH |
| 25 | 31Y1-15381 | PIPE ASSY-B,RH |
| K26 | Y171-024004 | O-RING |
| 27 | S107-120552 | BOLT-SOCKET |
| K | 31Y1-15390 | SEAL KIT |
| K | 31Y1-18070 | SEAL KIT |
| K | 31Y1-18071 |
*Note:Suitable for different models. Please contact us for the specific part number,part number information is being updated
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
| Feature | Description |
| Material | Tempered steel |
| Surface Treatment | Induction hardened before chrome plating to prevent bending and scratching |
| Rust Resistance | Resists rust for over 100 hours in salt spray tests |
| Production Process | Produced and electroplated in-house |
| Finish | Mirror finish technology |
Automatic Welding Process
| Feature | Description |
| Welding Method | Fully automated welding for consistency and integrity |
| Craftsmanship | Lean welding craft ensures strong joint strength and eliminates defects |
| Weld Seam Quality | Weld seam matches the appearance of original parts |
| Durability | 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