Product Video
Products Description
|
Brand |
Product Name |
Model |
Weight/pc |
Part Number |
|
Caterpillar
|
CAT Stick cylinder |
349D |
618.75 Kg |
3706692 |
We supply all models of komatsu excavator track roller. If you need to know other models, please contact us.
|
Product Name |
CAT Stick Cylinder |
|
Part Number |
3706692 |
|
Origin |
US
|
|
Brand Name |
STONE |
|
Model |
CAT 349D |
|
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 |
Customizable |
|
Application |
Excavator
|
|
Customizable |
including customized materials, surface treatment and specifications |
Product related information
Cat 349D excavator
Specifications
Engine Power：283kw
Operating weight (kg)：46,285kg
Track
Track Gauge:2740mm
Shoe Size:750mm
Number Of Track Rollers Per Side:8
Number Of Carrier Rollers Per Side:2
Number Of Shoes Per Side:49
STONE : Product Advantages
Overall Appearance
Constructed with a high-strength alloy steel cylinder barrel, it features a cylindrical structure with an outer diameter of approximately 190mm. The surface is treated with chrome plating or a special anti-corrosion finish. It connects via flanges or eye rings at both ends, presenting a concise and compact appearance.
Sealing System
Utilizes a multi-component sealing system, including a primary seal (U-cup or V-packing), a dust ring, and a guide ring. The sealing materials are oil-resistant and wear-resistant polyurethane or fluororubber, ensuring reliable sealing performance.
Cushioning Structure
Hydraulic cushioning devices are installed at both ends of the cylinder or at the rod end. When the piston reaches the end of its stroke, throttling cushioning reduces impact, thereby lowering noise and vibration.
Connecting Components
The piston rod end and cylinder bottom end are connected using high-strength pins. The pins are surface-treated with chrome plating or quenching for superior wear resistance, and grease fittings are provided at the connection points.
Production process
Precision Honing Process for Cylinder Tubes
The inner wall of the cylinder tube is the core working surface that directly interfaces with the seals. The surface roughness of Ra0.2-0.4μm and the cross-hatch pattern formed by precision honing determine the oil film retention capacity, seal lifespan, and wear resistance.
01
Hard Chrome Plating Process for Piston Rods
The piston rod is the only exposed moving part, subjected to external shocks, dust, corrosion, and other harsh conditions. The hard chrome plating layer (with a hardness of HV800-1000) serves as the first line of defense against wear, scratches, and corrosion. The quality of the plating directly determines the service life of the piston rod.
02
Precision Molding Process for Seals
Seals are the "lifeline" of hydraulic cylinders, as all leakage issues ultimately stem from seal failure. Precision molding ensures the dimensional accuracy, material uniformity, and geometric consistency of the seals, which directly affects the sealing performance.
03
Clean Assembly Environment Control
Hydraulic systems are extremely sensitive to contamination; micron-level impurities can cause valve core jamming and seal scratching. Assembling in a clean environment using specialized fixtures is crucial to preventing "congenital contamination."
04
Working performance
Digging Force Performance
With a maximum digging force of approximately 183kN, it delivers ample thrust when excavating hard soil, rock, and other materials, ensuring high operating efficiency.
Operating Speed
The cat stick cylinder retraction speed is relatively fast. Combined with the regeneration function, the single-cycle time is shortened, which improves loading efficiency.
Stability
Featuring a large-diameter piston rod and cylinder barrel design, it can operate at a working pressure of up to 35MPa. It maintains stable movement and is resistant to shaking under heavy-load conditions.
Reliability
Constructed with high-strength materials and precision manufacturing processes, it maintains excellent performance even under frequent impact loads.
Adaptability
By adjusting hydraulic system parameters, it can be adapted to meet the requirements of different operating conditions.
Maintenance Recommendations
Seals
It is recommended to replace them every 5,000-8,000 working hours or every 2-3 years, depending on the operating conditions. If leakage is found, replace them immediately.
Guide Bushing
The service life is approximately 8,000-10,000 hours. It should be replaced when significant wear or uneven wear is observed.
Piston Rod
Under normal use, it can last over 10,000 hours. Repair is required if the chrome plating is damaged or if the scratch depth exceeds 0.1mm.
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
How does the digging force perform in actual operation?
The stick cylinder of the Cat 349D has a rated digging force of 183 kN, and the bucket digging force is 268 kN. Equipped with a C13 engine and a dual main pump hydraulic system, it provides ample power reserve for conventional working conditions such as mining, construction, and road building.
What is the service life, and what is the failure rate under heavy-duty conditions?
Under normal maintenance, the design life of this cylinder can reach 8,000-10,000 working hours. Under heavy-duty conditions (such as mining), a comprehensive inspection is recommended every 2,000 hours, and the replacement cycle for vulnerable parts such as seals will be shortened accordingly. Under standard operating conditions, the non-human failure rate within the first 5,000 hours is less than 3%. However, the actual service life is significantly affected by operating habits, maintenance frequency, and the severity of working conditions. It is advisable to maintain regular maintenance records.
What is the overall cost-effectiveness regarding the purchase price and long-term maintenance costs?
While the purchase price of genuine Cat parts is higher than that of aftermarket (non-genuine) parts, aftermarket options do offer a price advantage.
However, evaluating cost-effectiveness requires considering three key factors:
Fuel Efficiency: The regeneration circuit technology reduces fuel consumption by approximately 8-12%, resulting in significant long-term savings.
Reliability: Genuine parts feature a lower failure rate and require less frequent maintenance, thereby minimizing costly downtime compared to aftermarket parts.
Warranty: Free replacement during the warranty period helps mitigate unexpected expenses.
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