उत्पत्ति के प्लेस:
चीन
ब्रांड नाम:
Belparts
प्रमाणन:
CE
मॉडल संख्या:
SK115DZ IV
More Branded Accessories are Available
| Hydraulic Parts | Hydraulic Pump | Final Drive | Travel Reduction |
| Swing Motor | Swing Reduction | Control Valve | Gear Parts |
| Slew Bearing | Engine Assembly | Hydraulic Cylinder | ECU |
Kobelco SK115DZ IV Left Boom Hydraulic Cylinder | PN:2438U1134F1 | Premium Aftermarket Replacement
1. Product Overview
This left boom hydraulic cylinder is professionally manufactured aftermarket replacement exclusively matching Kobelco SK115DZ IV medium excavator, also compatible with SK120 / SK120LC / SK130LC series counterparts sharing identical boom mounting standards. As the core load-bearing lifting component of front working device, it undertakes boom hoisting, descending and heavy load holding for municipal road renovation, residential foundation trenching, small stone stockyard loading and rural infrastructure earthmoving tasks. It is widely stocked by regional machinery repair shops, mid-size compact excavator rental fleets and cross-border spare parts dealers focusing on fourth-gen Kobelco DZ models.
Every cylinder is processed strictly following original Kobelco engineering drawing standards. Pin hole center distances, lug width, hydraulic oil port orientation and ear bushing installation dimensions fully match OEM 2438U1134F1, enabling direct plug-and-field replacement without grinding, cutting or re-welding, drastically cutting on-site maintenance labor hours and machine downtime.
Basic Product Information Sheet
| Item | Detailed Specification |
|---|---|
| Full Product Name | Left Boom Hydraulic Cylinder Assembly |
| Applicable Excavator | Kobelco SK115DZ IV, interchangeable with SK120/SK120LC/SK130LC |
| OEM Reference Part Number | 2438U1134F1 (Left Side Boom Cylinder) |
| Product Grade | Brand-new heavy-duty aftermarket hydraulic assembly |
| Quality Warranty | 12-month full coverage for all factory production defects |
| Minimum Order Quantity | 1 unit, large in-house ready stock for immediate dispatch |
| Production Certification | ISO9001 full-process quality control; 100% high-pressure leakage & reciprocating fatigue testing before packaging |
2. Core Engineering Technical Parameters
| # | Part No. | Description | Qty |
|---|---|---|---|
| . | 24100J15091F3 | BOOM ASSY, 4.6M (15 FT-1 INCH) | 1 |
| 2 | 2438U1133F1 | CYLINDER; RH BOOM | 1 |
| 3 | 2438U1134F1 | CYLINDER; LH BOOM | 1 |
| 4 | 2438U1132F1 | CYLINDER; ARM | 1 |
| 5 | 2418P26601 | RIGID TUBE; TUBE TUBE | 1 |
| 6 | 2418P26602 | TUBE; TUBE | 1 |
| 7 | 2418P26603 | RIGID TUBE; TUBE TUBE | 1 |
| 8 | 2418P26604 | RIGID TUBE; TUBE TUBE | 1 |
| 10 | 2418P19313 | RIGID TUBE; TUBE, BRAZED | 1 |
| 15 | 2444R1177D1 | FLEXIBLE HOSE; 800mm Long (31-1/2 in) | 1 |
| 18 | HX21E04250DY | FLEXIBLE HOSE,6.30mm ID x 2500mm L; HOSE | 1 |
| 21 | ZH22Z04000 | HYD CONNECTOR; 1/4"PTx1/4"PFx37mm Long | 3 |
| 23 | ZG91S02000 | LUBE NIPPLE,1/8" NPT x 1/8" NPT; 1/8" PT -- Straight | 9 |
| 24 | 2432T2242 | CLAMP; Double -- 106x38x12mm (Ø23xØ29mm) | 3 |
| 25 | 2432T2244 | CLAMP; Double -- 102x32x12mm (Ø23xØ23mm) | 5 |
| 26 | ZC26X22011 | CLAMP; Single Line -- 38x29x65mm Long | 4 |
| 27 | 2432T1333 | CLAMP; Single Block -- 50x30x25mm | 1 |
| 29 | ZS13C10040 | SCREW; M10x1.50x40mm | 3 |
| 30 | ZS13C10045 | SCREW; M10x1.50x45mm | 5 |
| 31 | ZS13C10050 | CAPSCREW; M10x1.50x50mm | 2 |
| 32 | ZS13C10060 | SCREW; M10x1.50x60mm | 20 |
| 33 | ZS13C10070 | SCREW; M10x1.50x70mm | 4 |
| 34 | ZS13C12025 | SCREW; M12x1.75x25mm | 2 |
| 35 | ZS13C12030 | CAPSCREW; SCREW M12x1.75x30mm | 2 |
| 36 | ZS13C12045 | SCREW; M12x1.75x45mm | 3 |
| 37 | 2420T4331D1 | SCREW,M12 x 1.75 x 125mm; M12x1.75x125mm | 1 |
| 38 | 2420T4327D6 | SCREW,M14 x 125mm; CAPSCREW, M14 X 125mm | 4 |
| 39 | ZN13C10008 | NUT; M10x1.50mm | 2 |
| 40 | ZN13C12010 | NUT; M12x1.75mm | 2 |
| 41 | ZN13C14011 | NUT; M14x2.0mm | 8 |
| 42 | ZW22X10000 | LOCK WASHER; ID 10 x OD 18.4 x Th 2.5mm | 43 |
| 43 | ZW22X12000 | LOCK WASHER; ID 12 x OD 21.5 x Th 3.0mm | 7 |
| 44 | ZD12P02600 | O-RING; ID 25.70 ± 0.26 x OD 32mm | 6 |
| 45 | 2419T3846 | PIN | 1 |
| 46 | 2419P4034D1 | PIN | 1 |
| 47 | 2419P1685D1 | PIN | 2 |
| 48 | 2419T7612 | PIN | 1 |
| 48 | 2419P4125 | PIN | 1 |
| 51 | 2418T12645D2 | PLATE; 125 x 261 x Th 9.0mm | 2 |
| 52 | 2445R138D6 | SEAL,70mm ID x 85.3mm OD x 4mm Thk; Seal, Dust -- ID 70 x OD 85 x Th 4mm | 2 |
| 54 | B16T0442D63 | SHIM,120mm OD x 77mm ID x 1.6mm Thk; ID 77 x OD 120 x Th 1.6mm | 2 |
| 57 | B16T0442D1 | SHIM,130mm OD x 72mm ID x 1.2mm Thk; ID 72 x OD 130 x Th 1.2mm | 4 |
| 58 | B16T0442D2 | SHIM,130mm OD x 72mm ID x 1.6mm Thk; ID 72 x OD 130 x Th 1.6mm | 4 |
| 59 | B16T0442D5 | SHIM,130mm OD x 72mm ID x 2.3mm Thk; ID 72 x OD 130 x Th 2.3mm | 4 |
| 60 | 2418T12675D1 | COLLAR CLAMP; COLLAR | 2 |
| 61 | ZH32Z04000 | ELBOW; 90° -- (1/4" PT - 1/4" PT), (Incls. O-Ring ZD12P01100) | 2 |
| 62 | 2444R1169D2 | FLEXIBLE HOSE; 800mm Long (31-1/2 in) | 4 |
| 63 | 2444R1169D1 | FLEXIBLE HOSE; 700mm Long (27-1/2 in) | 4 |
| 64 | 2411J5139D2F1 | BOOM, HOE BOOM ASSY, STD, QTY-F1: 1, QTY-F2: -, QTY-F3: -, QTY-F4: - | 1 |
| 64-40 | 2405T1957 | BUSHING | 2 |
| 65 | 2418P31219D1 | RIGID TUBE; TUBE | 1 |
| 66 | 2418P31219D2 | TUBE | 1 |
| 67 | 2418P31220D1 | RIGID TUBE; TUBE | 1 |
| 68 | 2418P31220D2 | RIGID TUBE; TUBE | 1 |
| 71 | B16T0442D80 | SHIM,120mm OD x 77mm ID x 1.2mm Thk; ID 77 x OD 120 x Th 1.2mm | 2 |
| 72 | 2416T13218 | U-BRACKET | 2 |
| 73 | 2414P4100D1 | COVER; RH | 1 |
| 74 | 2414P4100D2 | COVER; LH | 1 |
| 75 | ZS18C10025 | SCREW,Hex, M10 x 25mm; M10x1.50x25mm | 2 |
| 76 | ZS18C10020 | SCREW,Hex, M10 x 20mm; M10x1.50x20mm | 4 |
| 77 | ZW16X10000 | WASHER; ID 10 x OD 21 x Th 2.0mm | 4 |
| 78 | ZW26X10000 | LOCK WASHER; ID 10 x OD 18 x Th 2.5mm | 6 |
| 79 | 2418P31218 | TUBE | 1 |
| 80 | HX21E04070DY | HOSE,6.30mm ID x 700mm L; HOSE | 1 |
| 81 | HX21E04065DY | HOSE,6.30mm ID x 650mm L; HOSE | 1 |
| 82 | HX21E04190DY | HOSE,6.30mm ID x 1900mm L; HOSE | 1 |
| 83 | HX21E04200DY | HOSE,6.30mm ID x 2000mm L; HOSE | 1 |
| Technical Index | Standard Parameter |
|---|---|
| Cylinder Tube Inner Bore | 105 mm |
| Hard Chrome Piston Rod Diameter | 70 mm |
| Effective Working Stroke | 980 mm |
| Rated System Operating Pressure | 31.4 MPa |
| Factory Hydraulic Proof Test Pressure | 47.1 MPa (1.5 times rated load for full leak inspection) |
| Barrel Raw Material | High-density seamless alloy steel with ultra-precision deep inner honing, low friction inner wall |
| Piston Rod Surface Treatment | 40CrMo quenched & tempered base, 28–32μm thick hard chrome plating, surface hardness HRC68–72, scratch & impact resistant |
| Matching Independent Seal Kit PN | 2438U1133R200 (universal left & right boom seal kit) |
| Allowable Operating Temperature Range | -25℃ ~ +85℃ |
| Unique Structural Design | Asymmetric reinforced mounting lugs matched to SK115DZ IV left boom frame; large self-lubricating copper bushings; built-in single-stage buffer valve to absorb impact during frequent boom lifting/lowering on mixed construction sites |
Distinctive Product Competitive Edges
Left-Side OEM Dimensional Replication for SK115DZ IV Chassis Layout
Customized asymmetric lug structure specially for the left boom installation position of SK115DZ IV, avoiding assembly dislocation caused by mixing left/right cylinders. All connection sizes perfectly align original 2438U1134F1, connecting factory boom linkages and hydraulic pipelines smoothly without forced assembly that accelerates seal wear and hidden oil leakage.
Medium Construction Site Reinforced Anti-Collision Structure
Thickened cylinder barrel and integrated cast lug plates are upgraded for mixed working scenarios of soil digging and light rock loading. It effectively withstands repeated medium cyclic loads and accidental collisions with concrete edges, tree roots and foundation stones, reducing deformation failure frequency compared to thin-wall generic aftermarket cylinders.
Two-Round Independent Offline Screening Eliminates Hidden Malfunctions
Each finished cylinder undergoes dual strict testing procedures: full-stroke reciprocating cycle fatigue test to verify structural stability under long-hour continuous work, plus high-pressure soaking airtight inspection to detect internal and external oil leakage. All substandard units are eliminated before warehousing to prevent sudden construction shutdown losses for end users.
Balanced Cost & Durability for Mid-Tier Excavator Fleet Operators
It delivers equivalent rigidity, operation smoothness and service cycle as genuine Kobelco OEM hydraulic cylinders with a much more competitive price tag, significantly lowering long-term recurring spare part expenditure for independent repair garages and medium-sized rental companies managing SK115DZ IV fleets.
Multi-Mode Global Shipping Solutions Adapted to Different Client Demands
Ready-stock products can be shipped out within 3 working days after payment confirmation. Air express channels support emergency rush orders for sudden on-site breakdown repairs; consolidated sea bulk and full-container FCL shipping provide budget-friendly wholesale transport for construction machinery distributors serving Africa, Southeast Asia and Middle Eastern municipal engineering markets.
Manufacturer Production Strength Brief
Our factory has over 10 years of specialized R&D and mass production experience in hydraulic cylinders for Kobelco fourth-generation DZ & SK series medium excavators, including the mainstream SK115DZ IV model. We own complete supporting production lines covering heavy integrated forging, precision deep honing, integral heat treatment and automatic chrome plating, equipped with professional load simulation test benches to optimize product performance against real construction working conditions. Our aftermarket hydraulic cylinder product line is exported to dozens of countries worldwide all year round, accumulating stable market reputation and continuous positive feedback from global compact machinery spare parts distributors relying on precise model matching and consistent stable quality.
Frequently Asked Customer Questions
Q1: Can this left boom cylinder fit SK115DZ III or SK130DZ IV excavators?
A: Not fully interchangeable. Different generation excavators adopt exclusive part numbers and unique lug installation geometry; SK130DZ IV uses longer stroke boom cylinders with different pin spacing. Please confirm your machine’s full model and left/right boom position before placing orders.
Q2: Does the standard delivery package include the matching seal repair kit?
A: Standard packaging only contains the complete left boom cylinder assembly. The dedicated 2438U1133R200 seal kit needs separate purchase, and we can provide a discounted bundled quotation if cylinder + seal kit are ordered together.
Q3: What anti-corrosion protective measures are adopted for long-distance ocean transportation?
A: Anti-rust hydraulic oil is fully injected into both front and rear cylinder chambers for internal anti-corrosion protection; anti-rust grease is evenly coated over the entire exposed piston rod surface. The whole cylinder unit is wrapped with multi-layer thick waterproof PE film and placed inside reinforced thick plywood export cases to block scratches, collision deformation and moisture erosion during long ocean transit.
Q4: Will tiered volume discounts apply when purchasing a full boom+arm+bucket cylinder set for SK115DZ IV?
A: Yes. Complete front working device cylinder set orders enjoy gradient bulk purchase discounts. Consolidated full-container sea shipment service is also available to cut down overall international logistics costs for large batch orders.
Q5: What after-sales technical support can I receive if oil leakage occurs within the 12-month warranty period?
A: Kindly supply clear photos of the leakage position and your excavator serial number for verification. We will arrange free replacement sealing accessories and step-by-step remote maintenance operation guidance promptly to resolve the leakage fault efficiently.
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