Product Video
Products Description
|
Brand |
Product Name |
Model |
Weight/pc |
Part Number |
|
Caterpillar |
CAT STICK CYLINDER | 365C |
46.36Kg |
326-4403 |
Product Details
|
Product Name |
CAT STICK CYLINDER |
|
Part Number |
326-4403 |
|
Origin |
Japan |
|
Brand Name |
STONE |
|
Model |
365C |
|
Price |
Negotiable |
|
Packing Details |
Standard Export Packing |
|
Delivery Time |
0-30 Days |
|
Payment Term |
L/C, T/T |
|
Price Term |
FOB, CIF, CFR |
|
Supply Capacity |
50,000 PCS/Month |
|
Minimum Order Quantity |
1 PC |
|
Material |
High Quality Steel |
|
Technology |
Precision Machining |
|
Surface |
Treatment Anti-Corrosion Coating |
|
Hardness |
HRC 48-52 |
|
Quality |
Original Factory Standard |
|
After-Sales Service |
Full Support, Online Service |
|
Color |
Standard Caterpillar Yellow or Customizable |
|
Application |
Excavator |
|
Customizable |
including customized materials, surface treatment and specifications |
Applicable Models
|
365B L |
385C L |
|
345C |
|
Product advantages

Caterpillar 365C
Specifications:
Engine Model: Cat® C15 ACERT™
Net Flywheel Power: 302 kW
Operating Weight: 65960 kg
Track
Number of Shoes - Each Side - Long Undercarriage: 47
Number of Carrier Rollers - Each Side: 3
Number of Track Rollers - Each Side - Long Undercarriage: 8
High Strength, Durability, and Exceptional Load Resistance
The Cat stick cylinder barrel is precision-machined from high-strength ST 52 steel, and the piston rod undergoes special chrome plating. This effectively resists wear, corrosion, and impact, meets the demands of heavy-duty operations, and extends maintenance cycles.
Excellent Sealing Performance, Minimal Leakage Risk
Utilizes high-quality NOK sealing components, paired with Caterpillar's proprietary seal groove design. This effectively prevents hydraulic oil leakage and blocks external contaminants like mud, sand, and dust from entering the cylinder, preventing hydraulic system contamination and component wear.
High Control Precision, Smooth and Efficient Operation
Based on precise machining and strict dimensional control, this Cat stick cylinder stroke is accurately controllable, and hydraulic flow pressure regulation is responsive. This enables smooth arm start-up, steady operation, and precise stopping-free from shock or stick-slip-effectively improving the excavator's operational precision.
Strong OEM Compatibility, Easy and Hassle-Free Installation
Manufactured strictly according to OEM drawings, with dimensions and interfaces identical to the original part. It can be installed directly without modification and is perfectly compatible with the hydraulic system.
Work efficiency

Drives Arm Movement, ensuring the Core Working Functions
As the primary power component for the arm, it efficiently converts hydraulic energy into linear mechanical force to extend and retract the arm, driving the bucket for digging, breaking, loading and material handling. It is critical for earthmoving, material transport and trench finishing, directly influencing work efficiency and operational quality.
Provides stable load support and enhances operational safety
In heavy-load scenarios like digging and lifting materials, this cat stick cylinder stably bears the load pressure from the arm and bucket, maintaining arm position. This prevents arm sagging or shaking due to excessive loads, avoiding safety hazards like material spillage or machine instability, thereby ensuring safety for both the operator and the equipment.


Adapts to Complex Conditions, Enhances Job Site Versatility
With excellent wear and corrosion resistance, it operates steadily in mining, construction waste processing, river dredging and other harsh conditions. It withstands abrasion from gravel and debris while adapting to wide temperature ranges and humid environments, maximizing machine versatility across applications.
Optimizes Power Transmission, Reduces Energy Loss
High hydraulic-mechanical conversion efficiency minimizes power loss during transmission, directing more usable force to the arm. This improves productivity while lowering fuel consumption. Smooth, low-shock operation also reduces overall machine wear, extending service life and lowering total operating costs.

Daily Maintenance Recommendations
Inspect seals and connections regularly for leaks
Perform weekly visual inspections of seal areas and hydraulic connections for oil leakage, seal degradation or damage. Replace with genuine-quality seals immediately if needed to prevent contamination and internal wear, and maintain proper hydraulic oil level.
Maintain clean and correctly specified hydraulic oil
Use high-grade anti-wear hydraulic oil; avoid mixing different brands or viscosity grades. Replace hydraulic oil and clean or replace filters every 6–12 months or 500–1000 operating hours. Monitor oil condition, clarity and level; change or top up oil if contaminated or low to protect internal cylinder components.
Clean and protect the piston rod routinely
Wipe the piston rod clean of mud, dust and debris after each shift to prevent scoring or seal damage. Inspect the rod surface for scratches, corrosion or pitting. Minor imperfections may be polished; severe damage requires timely repair or replacement to prevent further deterioration.
Standardized operation avoiding overload and shock
Do not exceed the arm's rated load capacity, and avoid striking rigid objects with the arm to prevent cylinder barrel deformation or piston rod bending. After startup, cycle the arm through full extension and retraction 5–10 times to bleed air and warm the hydraulic system, avoiding unloaded or overloaded operation.
STONE

Stone is a leading supplier of engineering machinery parts, focusing on providing high-quality parts for mining companies. Since its establishment in 2004, we have been based in Shanghai, China, and have built our own brand STONE, becoming a trusted choice in the industry. We are committed to providing a variety of parts including bulldozers, excavators and wheel loaders for well-known brands such as Caterpillar and Komatsu. Our product line covers a full range of OEM parts, such as Track Chain, Track Rollers, Sprocket, Excavator Buckets, Blades, Excavator Cylinders, Swing Circles, and various electrical and hydraulic components to ensure that our customers' stringent requirements for quality and performance are met.
quality
years experience
service
hours warrant
Q&A

Can the 365C Cat stick cylinder be interchanged with other excavator models?
No. This cylinder is engineered specifically for the Cat 365C with matched dimensions, mounting geometry and hydraulic characteristics. It is not compatible with other excavator models or other Cat series due to dimensional and performance differences. Forced installation may cause power mismatch, premature wear and safety risks.
What is the typical service life, and how can it be extended?
Is adjustment required after cylinder replacement, and what should be noted?
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