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This heavy-duty boom hydraulic cylinder is built as a direct bolt-on aftermarket replacement exclusively for classic 325CL mid-heavy crawler excavator, a discontinued C-series equipment widely deployed in municipal infrastructure expansion, highway mass earth backfilling, medium-sized quarry aggregate extraction and large residential foundation excavation. As the core load-bearing hydraulic component of front attachments, it withstands frequent alternating lifting loads during boom up and down, delivering stable load retention performance to support long-cycle heavy construction tasks. It is a core fast-moving inventory spare for second-hand equipment overhaul yards, medium & large construction rental fleets and cross-border spare parts traders focusing on obsolete C-series mid-heavy excavators.
All production procedures strictly follow original vintage heavy-duty OEM engineering drawings and ultra-tight assembly tolerances. Key mounting parameters including lug center distance, pin bore inner diameter, thick wear-resistant bronze bushing specifiions and hydraulic port layout fully match two interchangeable OEM part numbers 179-9782 and 1799782. No on-site cutting, grinding or welding modifiion is required during replacement installation, effectively cutting mechanic labor costs and avoiding long construction shutdown losses caused by scarce original boom cylinder stocks for aging 325CL machine frames.
2.Basic Product Information Sheet
Item
Detailed Specifiion
Full Product Name
Complete Boom Hydraulic Cylinder Assembly
Applicable Machinery
325CL Medium-Heavy Long Track Crawler Excavator
OEM Reference PN
179-9782, 1799782
Product Grade
Reinforced aftermarket hydraulic cylinder for heavy construction and light-medium quarry vintage machinery
Quality Warranty
12-month full warranty covering all factory manufacturing defects
Minimum Order Quantity
1 unit, sufficient ready stock for immediate global delivery
QC Execution Standard
ISO9001 full traceable production management; 100% high-pressure hydrostatic airtight leak test + full-stroke heavy-load reciproing impact fatigue testing before packing
3.Core Technical Parameters
#
Part No.
Description
Qty
All
1799782
CYLINDER GROUP-BOOM; (169PAGE)
1
1
3B8489
FITTING-GREASE; (FAN AND ALTERNATOR DRIVE)
2
2
7X4803
SEAL (ID=90.00mm); (OD=106.15mm)
2
3
0960854
SEAL; (ID=79.85mm)
2
4
2478853
CYLINDER GROUP-BUCKET
1
----
CHANGE FROM PREVIOUS TYPE
----
SEPARATE ILLUSTRATION
Technical Index
Standard Value
Cylinder Tube Inner Bore
136 mm
Hard Chrome Plated Piston Rod Diameter
88 mm
Effective Working Stroke
1460 mm
System Rated Working Pressure
32 MPa
Factory Hydraulic Proof Test Pressure
48 MPa (1.5 times rated pressure for full internal & external leak screening)
Cylinder Tube Raw Material
High tensile seamless alloy steel processed via deep precision internal honing, mirror smooth anti-abrasion inner wall to resist non-stop heavy hydraulic oil circulation under long-cycle high-load construction and quarry working environments
Piston Rod Surface Treatment
Modified 40CrMo quenched & tempered high-strength base alloy, 30–35μm dense hard chrome overlay, surface hardness HRC69–73. Excellent scratch resistance, bending stability and impact resistance against jagged rock fragments and massive concrete blocks
Matching Dedied Seal Kit PN
179-9782-KIT
Applicable Operating Temperature Range
-28℃ ~ +90℃
Structural Design Highlights
Oversized extra-thick integrated boom connecting lugs paired with heavy-duty thick-wall bronze alloy wear bushings; dual-stage internal buffer system to counteract extreme instantaneous impact loads generated by repeated full-load boom lifting and lowering cycles
Core Competitive Advantages
Dual Interchangeable PN Exclusive Fit Only for 325CL C-Series Mid-Heavy Excavator
PN 179-9782 and 1799782 are mutually interchangeable boom cylinders tailor-made solely for 325CL, incompatible with 325C, 330CL and other C-series excavator models. All connection geometric parameters fully replie genuine vintage C-series heavy-duty OEM components, seamlessly fitting aged machine boom linkages and complete original hydraulic piping layout. It thoroughly eliminates assembly offset issues that trigger rapid seal aging and persistent oil seepage when generic thin-wall cylinders are forcibly mounted on slightly fatigued reinforced mid-heavy old machine frames.
Vintage C-Series Heavy Construction Targeted Reinforced Shock-Proof Upgrade
Ordinary thin-wall general hydraulic cylinders cannot sustain round-the-clock alternating heavy lifting loads of aging 325CL machines working in quarries and large foundation sites. This product greatly upgrades cylinder barrel wall thickness and integrated cast lug structural strength customized for the high-intensity working rhythm of 325CL mid-heavy excavators. It endures continuous violent collisions with hard rock and concrete chunks, boasting service life far exceeding low-cost universal aftermarket alternatives only fit for light landscaping work.
Two Independent Offline Pre-Delivery Quality Screenings to Eliminate All Hidden Failure Risks
Every finished boom cylinder undergoes two fully separate rigorous offline test sequences before exiting production workshops. The full-stroke reciproing fatigue test simulates months of non-stop full-load foundation and quarry earthmoving to verify integral structural bearing rigidity; prolonged high-pressure submerged airtight inspection pinpoints every tiny internal and external oil leakage blind spot. All defective finished goods are fully filtered out prior to warehousing to prevent costly unplanned construction shutdown losses for contractors operating second-hand mid-heavy fleets.
Optimized Total Ownership Cost for Operators Holding Vintage C-Series Excavator Fleets
Genuine OEM spare parts for discontinued 325CL mid-heavy excavators are globally scarce, marked with exorbitant retail prices and extremely lengthy international supply lead times. This aftermarket boom cylinder delivers identical structural load capacity, low-vibration stable operation and complete service lifespan as authentic factory components at an economical unit cost. It drastically slashes recurring long-term maintenance overhead for large equipment overhaul hubs and heavy construction rental enterprises managing batches of aging 325CL machines.
Multi-Mode Global Logistics Solutions Customized for Remote Mountain Quarry & Infrastructure Sites
All in-stock units can be dispatched within 3 working days upon payment clearance. Air freight channels handle emergency rush shipments for sudden machine breakdowns in remote mountain quarry and dam construction zones; consolidated bulk sea cargo and full FCL container transport offer cost-effective wholesale delivery packages for machinery distributors supplying large-scale infrastructure markets across Africa, Southeast Asia, the Middle East and Latin America.
Factory Core Manufacturing Strength
Our production facility boasts more than ten years of targeted R&D and mass production experience for heavy hydraulic cylinders suited to vintage C-series mid-heavy excavators, with flagship 325CL as one of our core mature production lines. We operate a fully closed-loop integrated production workflow covering large heavy precision forging, deep inner honing, integral overall heat treatment and automated ultra-thick chrome plating. Exclusive heavy-load construction simulation test benches replie real harsh abrasive quarry and foundation working scenarios to continuously optimize product shock resistance and long-term wear durability. Our heavy construction-grade aftermarket hydraulic cylinder portfolio is exported worldwide all year round, maintaining sustained long-term cooperative partnerships and consistent high customer praise from global mid-heavy machinery spare parts distributors, thanks to precise vintage C-series model compatibility and unified strict stable quality control standards.
Regular Customer FAQ
Q1: Can this boom cylinder fit 325C or 330CL excavators?
A: Cross-model installation is not supported. Different generations of mid-heavy excavators adopt exclusive non-interchangeable OEM part numbers and unique lug mounting geometric dimensions. Please double-check your full machine model before submitting orders.
Q2: Does standard shipment packaging include the matching seal repair kit?
A: Standard packages only contain the complete boom cylinder assembly. The dedied 179-9782-KIT seal kit must be purchased separately, and we provide discounted bundled quotations for clients ordering the cylinder and seal kit together.
Q3: What anti-corrosion and anti-impact protective measures are implemented for long-haul ocean transit?
A: Anti-rust hydraulic fluid is fully injected into front and rear cylinder chambers to block internal corrosion; thick high-temperature anti-rust grease is evenly coated across the entire exposed piston rod surface. The full cylinder unit is wrapped with multiple layers of heavy-duty waterproof PE film and fixed inside reinforced extra-large thick plywood export crates to avoid scratches, impact deformation and moisture corrosion during lengthy cross-ocean shipping.
Q4: Are tiered volume bulk discounts available when purchasing a full boom + arm + bucket cylinder set for 325CL?
A: Yes. Orders for the complete front working attachment cylinder set qualify for progressive volume preferential pricing. Consolidated full-container sea shipping service can also be arranged to cut overall international logistics expenditure for large-batch procurement.
Q5: What after-sales technical support will be provided if oil leakage occurs within the 12-month warranty window?
A: Please submit clear photos capturing the exact leakage loion plus your excavator serial number for official verifiion. We will promptly send free replacement seal components and detailed step-by-step remote maintenance guidance to resolve oil leakage faults without interrupting critical large foundation 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...