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This heavy-duty bucket hydraulic cylinder serves as a fully interchangeable aftermarket replacement exclusively designed for 336EL large construction excavator, a popular E-series machine widely deployed in highway mass earthworks, urban large-scale real estate foundation excavation, mid-size open quarry stone loading and river channel dredging. As the end hydraulic power component of front work equipment, it delivers powerful digging and material dumping force to sustain nonstop high-intensity cyclic excavation tasks, making it a must-stock spare for specialized repair shops, large equipment rental companies and cross-border excavator parts wholesalers targeting E-series heavy machines.
Every manufacturing link strictly follows original OEM design specifications and tight assembly tolerances. Key mounting dimensions such as lug pitch, pin hole inner diameter, thick wear-resistant bronze bushing size and hydraulic hose port layout fully match four cross-referenced OEM part numbers: 357-9766, 315-4451, 3579766, 3154451. No cutting, grinding or welding adjustment is required during on-site installation, which greatly lowers maintenance labor cost and avoids long construction downtime caused by hard-to-source genuine bucket cylinders for aging 336EL units.
2.Basic Product Information Sheet
Item
Detailed Info
Full Name
Complete Bucket Hydraulic Cylinder Assembly
Applicable Machine
336EL Large Crawler Excavator
OEM Cross PN
357-9766, 315-4451, 3579766, 3154451
Product Grade
Reinforced aftermarket cylinder for heavy construction & medium quarry sites
Warranty
12-month full coverage against all factory production defects
MOQ
1 piece, abundant in-stock goods for fast worldwide delivery
QC Standard
ISO9001 traceable whole-process production control; 100% high-pressure air tightness test + full-stroke heavy load reciprocating fatigue impact test before shipment
3.Core Technical Specifications
Parameter
Standard Value
Cylinder Barrel Inner Diameter
145 mm
Hard Chrome Plated Rod Diameter
95 mm
Effective Working Stroke
1520 mm
Rated Working Pressure
32.8 MPa
Hydraulic Test Pressure
49.2 MPa (1.5 times rated pressure for comprehensive internal & external leak inspection)
Barrel Material
High tensile seamless alloy steel with deep precision internal honing, mirror smooth inner wall to resist long-term hydraulic oil abrasion under frequent heavy-duty cycles
Piston Rod Surface Treatment
40CrMo quenched and tempered high-strength alloy base, 30–35μm dense hard chrome coating, hardness HRC68–72. Outstanding resistance to scratch, bending deformation and impact from sharp rock and concrete debris
Matching Seal Kit PN
357-9766-KIT
Operating Temperature Range
-26℃ ~ +88℃
Structural Features
Widened ultra-thick bucket connection lugs equipped with oversized self-lubricating bronze wear sleeves; dual built-in buffer system to absorb severe instant shock during repeated full-load bucket grabbing and releasing
Core Selling Advantages
Four Cross-Referenced Part Numbers, Exclusive Fit for 336EL Only
357-9766, 315-4451, 3579766 and 3154451 share identical dimensional parameters and are mutually interchangeable, tailor-made only for 336EL, not compatible with 336E, 340EL or other E-series heavy excavator models. All connection geometric sizes completely replicate original E-series heavy-duty OEM components, perfectly fitting factory bucket linkages and hydraulic piping. It effectively eliminates assembly offset issues that accelerate seal aging and persistent oil seepage when generic thin-wall cylinders are forced onto reinforced heavy machine frames.
E-Series Heavy-Duty Reinforced Shockproof Structure for Mixed Construction & Quarry Scenarios
Cheap general thin-wall hydraulic cylinders cannot withstand round-the-clock alternating heavy digging loads on foundation sites and quarries. This product upgrades cylinder barrel wall thickness and cast lug structural strength customized for the high-load operation cycle of 336EL. It stands long-period cyclic heavy loads and frequent hard rock collisions, with service life far exceeding ordinary aftermarket cylinders only suitable for light landscaping work.
Dual Independent Offline Pre-Delivery Inspection to Eliminate Hidden Defects
Each finished bucket cylinder undergoes two separate offline testing procedures before leaving the factory. The full-stroke reciprocating fatigue test simulates months of continuous full-load highway and quarry earthmoving to verify overall structural bearing stability; extended high-pressure soaking airtight test locates every tiny internal and external oil leakage blind spot. All defective finished products are fully filtered out before warehousing to prevent costly unplanned construction shutdown losses for contractors and quarry operators.
High Cost Performance for Fleets Operating 336EL Excavators
Genuine OEM spare parts for 336EL heavy excavators carry high retail prices and long international supply lead times. This aftermarket bucket cylinder provides equivalent structural load capacity, smooth low-vibration stable operation and full service cycle same as original factory parts at competitive unit price, significantly cutting recurring long-term maintenance costs for large repair yards and heavy construction leasing enterprises with fleets of aging 336EL machines.
Flexible Global Logistics Solutions for Worldwide Construction & Mining Clients
All stocked products can be dispatched within 3 working days after payment confirmation. Air freight supports emergency urgent orders for sudden cylinder failures at remote mountain quarry and large dam construction sites; consolidated bulk sea freight and full FCL container transport offer cost-effective wholesale delivery plans for machinery distributors supplying infrastructure and mining markets across Africa, Southeast Asia, Middle East and Latin America.
Factory Manufacturing Strength
Our factory owns over ten years of specialized R&D and mass production experience in heavy hydraulic cylinders matching E-series large excavators, with flagship 336EL as one of our mature core production lines. We run a complete closed-loop production workflow including heavy-duty precision forging, deep inner honing, integral heat treatment and automatic thick chrome plating. Professional heavy-load mixed-site simulation test benches replicate real harsh quarry and foundation working environments to continuously optimize product shock resistance and long-term wear durability. Our heavy construction-grade aftermarket hydraulic cylinder product line is exported to dozens of countries year-round, maintaining stable long-term cooperative partnerships and consistent positive feedback from global heavy machinery spare parts distributors, thanks to precise exclusive E-series model matching and unified strict stable quality control standards.
Common Customer FAQ
Q1: Can this bucket cylinder fit 336E or 340EL excavators?
A: Cross-model installation is not supported. Different E-series heavy excavators adopt exclusive non-interchangeable OEM part numbers and unique lug mounting geometric dimensions. Please double-check your complete machine model before placing orders.
Q2: Does standard shipment package include matching seal repair kit?
A: Standard package only contains complete bucket cylinder assembly. Dedicated 357-9766-KIT seal kit needs separate purchase; we provide discounted bundled pricing for clients ordering cylinder and seal kit together.
Q3: What anti-rust and anti-collision protection measures are adopted for long ocean shipping?
A: Anti-rust hydraulic oil is fully filled into front and rear cylinder chambers to prevent internal corrosion; thick anti-rust grease is evenly coated on the entire exposed piston rod surface. The whole cylinder assembly is wrapped with multi-layer heavy waterproof PE film and fixed inside reinforced thick plywood export crates to avoid scratches, impact deformation and moisture corrosion during long cross-ocean transit.
Q4: Are tiered volume discounts available when purchasing full boom + arm + bucket cylinder set for 336EL?
A: Yes. Orders for complete front working attachment cylinder sets enjoy progressive bulk purchase discounts. Consolidated full-container sea shipping service can also be arranged to reduce overall international logistics expenses for large-batch procurement.
Q5: What after-sales technical support will be provided if oil leakage occurs within the 12-month warranty period?
A: Please submit clear photos capturing exact leakage location plus your excavator serial number for official verification. We will promptly send free replacement seal components and detailed step-by-step remote maintenance guidance to solve oil leakage faults without interrupting large-scale infrastructure and quarry construction schedules.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
2013
Total Annual:
$28000000-$41660000
Employee Number:
1200~1300
Ecer Certification：
Verified Supplier
Since 2013
Excavator Hydraulic Parts Manufacturer & Global Supplier Since 2013
Belparts Machinery Limited — Your Trusted Partner in Excavator Hydraulic Parts
Who We Are
Founded in September 2013 and headquartered in Guangzhou, China's premier engineering machinery hub, Belparts ha...
Since 2013
Excavator Hydraulic Parts Manufacturer & Global Supplier Since 2013
Belparts Machinery Limited — Your Trusted Partner in Excavator Hydraulic Parts
Who We Are
Founded in September 2013 and headquartered in Guangzhou, China's premier engineering machinery hub, Belparts ha...
