Quality 349EL Hydraulic Boom Cylinder for Excavator Spare Parts 358-8439 3588439 Aftermarket High Quality factory

349EL Hydraulic Boom Cylinder for Excavator Spare Parts 358-8439 3588439 Aftermarket High Quality

Name: 349EL Hydraulic Boom Cylinder for Excavator Spare Parts 358-8439 3588439 Aftermarket High Quality
Brand: GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED
SKU: 349EL
Price: 475.00 USD
Availability: InStock

Place of Origin:China

Brand Name:Belparts

Certification:CE

Model Number:349EL

Minimum Order Quantity:1 PCS

Price:Negotiation

Payment Terms:L/C,D/A,D/P,T/T,TRADE ASSURANCE,WEST UNION,PAYPAL

Supply Ability:100 PCS / Months

Product Details

Model: 349EL

Part Number: 358-8439 3588439

Part Name: Hydraulic Boom Cylinder

Application: Excavator

Condition: New

Quality: Aftermarket High Quality

Warranty: 1 Year

Shipment: DHL FEDEX TNT EMS UPS / Ses / Air

Emission Standards: Stage V

Product Description

349EL Boom Hydraulic Cylinder | PN:358-8439 / 3588439 | Premium Aftermarket Replacement

1. Basic Product Information

High-quality aftermarket boom hydraulic cylinder, OEM part number 358-8439(3588439), direct interchange for 349EL /349E /349FL large 49-ton crawler excavator. Controls boom lifting/lowering for heavy mining, rock quarry, bulk earthmoving and high-load engineering construction. Fully manufactured per original CAT drawing with identical mounting lug size, pin pitch and oil port layout for direct bolt-on installation without modification.

Item	Details
Product Name	Boom Hydraulic Cylinder
Fit Model	CAT 349EL,349E,349FL
OEM Code	358-8439 / 3588439
Quality Grade	Brand New Premium Aftermarket
Factory Warranty	12 Months against manufacturing defect
MOQ	1pc available from in-house stock
QC Certificate	ISO9001 full hydraulic pressure inspection

2. Core Technical Specification

349EL Hydraulic Boom Cylinder for Excavator Spare Parts 358-8439 3588439 Aftermarket High Quality 0

Spec Item	Parameter
Bore Diameter	170mm
Piston Rod Diameter	115mm
Stroke Length	1524mm
Rated Working Pressure	35MPa(5080PSI)
Factory Test Pressure	52.5MPa (1.5×rated working pressure)
Barrel Tube	ST52 seamless alloy steel, precision inner honing processing
Piston Rod	Medium carbon steel + 28~32μm hard chrome plating, surface hardness HRC67~70 anti-abrasion & anti-bending
Complete Seal Kit	Import PU+NBR composite sealing parts, oil-proof, anti-aging & high temperature resistant
Working Temperature	-25℃ ~ +85℃
Design Service Life	≥8500 working hours under heavy rock loading
Structure	Double lug with quenched copper wear-resistant bushing

3. Core Product Advantages

1:1 OEM Replacement: Same installation dimension as original CAT spare part, directly replace original 358-8439 cylinder for full serial number 349E/349EL/349FL machines.
Heavy-Duty Reinforced Design: Thickened ear base and reinforced cylinder barrel effectively resist frequent rock impact, prevent lug cracking and piston rod deformation under heavy mining load.
Full Pre-shipment Test: Every finished cylinder passes full-pressure leak test & reciprocating cycle test before delivery to eliminate inner & outer oil leakage hidden trouble.
Cost-Effective Option: Equal working performance with genuine CAT cylinder while saving 40%~50% purchasing cost for repair shops & spare parts wholesalers.
Flexible Delivery: In-stock items ship out within 3 working days; air freight 3~7 days, sea shipment 32~40 days available for bulk order.

4. Supplier Profile

We specialize in CAT E/EL/F series excavator hydraulic cylinders over 13 years, complete boom/arm/bucket cylinder lineup for CAT345CL,349E/EL,349FL,374F models, products widely exported to Africa, Southeast Asia, Middle East construction spare parts market.

5. FAQ

Q1: Does this boom cylinder fit CAT349D/349DL?
A: No, 349D series uses different OEM part number, cannot cross installation.
Q2: Can I purchase matching repair seal kit separately?
A: Matching exclusive seal kit for PN358-8439 is available for separate sale with bundle discount; seals are not pre-installed on cylinder by default.
Q3: Anti-rust package for long ocean shipment?
A: Inner cylinder filled with anti-rust hydraulic oil + piston rod coated anti-rust grease + waterproof PE wrapping + solid export plywood case packaging.
Q4: Discount for full set order(boom+arm+bucket cylinder)?
A: Full set combined purchase enjoys tiered unit discount & consolidated one-time freight to cut total logistics expense.
Q5: Warranty solution for oil leakage within valid period?
A: Provide clear leakage photos + excavator machine serial number, we offer free replacement seal kit or remote professional installation guidance accordingly.