320BL Excavator Hydraulic Boom Cylinder 118-4023 1184023 126mm Bore 1330mm Stroke Aftermarket
This heavy-duty aftermarket hydraulic boom cylinder is precision-manufactured as a direct interchangeable replacement for 320BL excavators. As the core hydraulic power component of the front working group, it controls boom lifting and lowering to complete heavy excavation, bulk material lifting, ground leveling and loading tasks. Widely applied in municipal engineering, road construction, stone quarries and medium-scale earthmoving projects.
All cylinders are strictly produced according to OEM technical standards, with identical mounting dimensions, pin hole spacing and hydraulic port layout. Direct bolt-on installation is available on site without cutting, welding or any secondary modifications.
| Item | Specification |
|---|---|
| Product Name | Hydraulic Boom Cylinder |
| Applicable Model | 320BL Excavator |
| OEM Part Number | 118-4023, 1184023 (Two codes correspond to one cylinder assembly) |
| Product Grade | Brand New High-Quality Aftermarket |
| Warranty | 12 months against manufacturing defects |
| MOQ | 1 unit, sufficient stock for immediate delivery |
| QC Standard | ISO9001 certified, full hydraulic pressure test & cyclic fatigue test before shipment |
| # | Part No. | Description | Qty |
|---|---|---|---|
| All | 1184023 | CYLINDER & SEAL GROUP-BOOM; (BOOM) | 1 |
| 1 | 1211611 | SEAL-LIP TYPE | 1 |
| 2 | 0961568 | RING-BACK UP; (BACKUP) | 1 |
| 3 | 0961567 | SEAL-U-CUP | 1 |
| 4 | 4I3611 | SEAL-BUFFER | 1 |
| 5 | 0964402 | BEARING-SLEEVE | 1 |
| 6 | 0940747 | RING; (RETAINING) | 1 |
| 7 | 1373760 | HEAD | 1 |
| 8 | 8T1447 | BOLT-SOCKET HEAD; (M16X2X70-MM) | 12 |
| 9 | 0963964 | RING-BACK UP; (BACKUP) | 1 |
| 10 | 0951717 | SEAL-O-RING (ID=114.40mm) | 1 |
| 11 | 1195203 | ROD AS | 1 |
| 11A | 1195200 | BEARING-SLEEVE | 1 |
| 12 | 1297771 | CYLINDER AS | 1 |
| 12A | 1297770 | BEARING-SLEEVE | 1 |
| 13 | 4I8864 | STOP | 1 |
| 14 | 1261935 | RING; (SEALING) | 1 |
| 15 | 4I3614 | PISTON | 1 |
| 16 | 4I3615 | RING-BACK UP; (BACKUP) | 2 |
| 17 | 0967803 | SEAL AS | 1 |
| 18 | 1261936 | RING | 2 |
| 19 | 0860255 | RING | 2 |
| 20 | 0964408 | SHIM; (0.3-MM THK) | 1 |
| 21 | 0963216 | SETSCREW-SOCKET; (M12X1.75X12-MM) | 1 |
| 22 | 0963891 | BALL, STEEL | 1 |
| 23 | 1195198 | LOCKNUT-SPECIAL | 1 |
| 24 | 0964411 | SEAL; (ID=80.00mm) | 4 |
| 25 | 3B8489 | FITTING-GREASE; (FAN AND ALTERNATOR DRIVE) | 1 |
| ---- | USE AS REQUIRED | ||
| ---- | METRIC PART | ||
| ---- | REMFG PART MAY BE AVAILABLE |
| Spec Item | Data |
|---|---|
| Bore Diameter | 126mm |
| Piston Rod Diameter | 83mm |
| Working Stroke | 1330mm |
| Rated Working Pressure | 31.4MPa |
| Factory Test Pressure | 47.1MPa (1.5 times rated working pressure) |
| Barrel Material | High-tensile seamless alloy steel with precision inner honing |
| Piston Rod | 40CrMo heat-treated steel, 28~32μm hard chrome plating, HRC68~72, excellent wear resistance & anti-deformation performance |
| Matching Seal Kit PN | 118-4023K |
| Working Temperature | -25℃ ~ +85℃ |
| Structure Feature | Double ear lugs with quenched copper wear bushings, built-in buffer device to reduce reciprocating impact |
- Dual PN Interchangeable OEM Fitment
118-4023 and 1184023 are two coding forms of the same boom cylinder. All structural sizes fully match original components, seamlessly connected with boom linkages and hydraulic pipelines for stable long-hour continuous heavy-load operation.
- Medium-Heavy Reinforced Structure
Thickened cylinder tube and connecting lugs are optimized for harsh quarry and construction environments, resisting long-term cyclic loads and accidental collisions to greatly extend service life.
- Multi-Round Strict Pre-Delivery Inspection
Each finished cylinder undergoes repeated full-stroke cycle tests and high-pressure airtight leak detection, completely eliminating hidden internal and external oil leakage risks.
- Outstanding Cost Performance
It delivers the same stability and service lifespan as genuine spare parts, effectively cutting repeated procurement costs for repair shops and spare parts wholesalers.
- Flexible Global Logistics Solutions
In-stock goods can be dispatched within 3 working days. Air freight satisfies urgent breakdown orders, while sea freight offers the most cost-effective solution for bulk wholesale shipments.
Our factory has over ten years of mature experience in R&D and manufacturing hydraulic cylinders for classic excavator series including 320BL. We supply complete boom, arm and bucket cylinder assemblies with sophisticated production craftsmanship and full-process strict quality control systems. Our aftermarket hydraulic cylinders are exported to aftermarket markets across Africa, Southeast Asia and the Middle East all year round, earning long-term trust and consistent positive feedback from global spare parts dealers.
Q1: Can this boom cylinder fit 320L or 322BL excavators?
A: No. Different excavator models adopt exclusive part numbers and unique structural dimensions without interchangeability. Please confirm your complete machine model before ordering.
Q2: Does the standard package include the matching seal repair kit?
A: Seal repair kit is not included in standard delivery. You can purchase the dedicated supporting seal kit separately, and we will provide a competitive quotation for combined orders.
Q3: How is the cylinder packed for long-distance sea transportation?
A: Anti-rust oil is filled into the cylinder inner cavity, anti-rust grease evenly coated on the piston rod surface. The whole cylinder is wrapped with waterproof PE film and packed in reinforced export plywood cases to avoid collision, scratch and moisture damage during ocean transit.
Q4: Are there tiered volume discounts when purchasing a full set of boom + arm + bucket cylinders?
A: Yes. Complete working device cylinder set orders enjoy graded volume discounts. Consolidated container shipment service is available to reduce total logistics expenses.
Q5: What after-sales support is available if oil leakage occurs within the 12-month warranty period?
A: Please provide clear photos of the leakage position and your excavator serial number. We will arrange free seal replacement and professional remote troubleshooting guidance promptly.
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