Meet the King Long PEV Where Electric Innovation Meets Driver Comfort

The all-new King Long PEV Series is not just electric, it's also driver-centric. 

Engineered to simplify operations and enhance on-road safety, every detail is designed to support a more intuitive and confident driving experience.

Key Upgrades:
✅ Intuitive Dashboard Layout 
✅ Integrated Safety Assist Features 
✅ Driver Cabin with Comfortable Climate

The future of electric driving starts with PEV. 

KingLong PEV Electric Bus

King Long E12 Hybrid Bus Combining Safety, Comfort, and Sustainability

Today, let us get to know the King Long E12. Its hybrid drivetrain is more economical and environmentally friendly.

✅ The low-floor E12 boasts a 12.3-inch full LCD display, overhead air vents, and three double doors for a pleasant journey for both drivers and passengers.

✅It features durable and comfortable EU-standard hanging rings for tight security.

✅ With an optimized lightweight design and a higher-strength body, it is much safer.

 

How to tighten tracks on excavator

To tighten the tracks chain track link on a cat excavator, you can follow these general steps:

Park the excavator on a level surface and engage the parking brake to ensure it is stable.

Locate the track tensioning device on the excavator. It is typically located on the front or rear side of the track frame and consists of an idler wheel or a cylinder with a tensioning spring.

Use a wrench or socket to loosen the lock nut on the tensioning device. This nut secures the adjusting bolt in place.

Turn the adjusting bolt clockwise to tighten the track tension. This will increase the tension on the track chain.

Check the tension of the track by pushing on it at the middle point between the drive sprocket and the front idler. It should have a slight amount of give, but not be too loose or too tight. The appropriate tension can vary depending on the specific model of the excavator, so consult the doolincm manufacturer's guidelines or an experienced operator for the recommended tension.

Once you have adjusted the tension, hold the adjusting bolt in place and tighten the lock nut to secure the adjustment.

Repeat the process for the opposite side of the excavator.

After adjusting the track tension on both sides, test the machine by operating it in forward and reverse and observing the tracks. They should move smoothly, without excessive slack or binding.

It's important to note that these steps are a general guideline, and the specific procedure may vary depending on the model and type of Caterpillar excavator you're working with. Always refer to the operator's manual for the correct instructions and consult with a trained technician or the manufacturer if you're unsure about any aspect of the track adjustment process.

excavator track chains for sale

excavator idler wheel factory

 

King Long's Commitment to Green, Safe, and Comfortable Travel

King Long is driving the future with a commitment to sustainability and safety because a better journey should care for both people and the planet. 

Our vehicles contribute to reduced carbon emissions without compromising performance. Together with advanced safety systems and a more human-centered interior design, King Long vehicles are built to support greener, more comfortable and more efficient mobility.

 

King Long vehicles

What Are the Benefits of Using an Electric Minibus in Cities?

Urban transportation systems around the world are evolving quickly. As cities search for cleaner, quieter, and more efficient transit options, the electric minibus has emerged as a practical and scalable solution. Designed for short routes and frequent stops, these compact vehicles offer a smart alternative to traditional diesel buses, especially in dense or low-demand areas.

The shift toward electric mobility isn’t just a trend—it’s backed by performance data, economic factors, and public demand for more sustainable cities. From municipal fleets to shuttle services, the electric minibus and other EV bus types are helping cities move forward with cleaner air, lower noise, and improved transit access.

 

Reduced Emissions on a Daily Basis

One of the most immediate and visible benefits of an electric minibus is the reduction in tailpipe emissions. According to the International Council on Clean Transportation (ICCT), a typical diesel minibus emits about 1.3 kg of CO₂ per kilometer. For a vehicle covering 150 km per day, that’s nearly 200 kg of CO₂ daily—or over 70,000 kg annually.

Full Electric Mini Bus

In contrast, an EV bus running on electricity from a low-carbon grid reduces that figure dramatically. In countries like Norway or France, where clean energy dominates the grid mix, the same vehicle emits as little as 10–15 g of CO₂ per kilometer. Even in regions still reliant on fossil-based power, well-to-wheel emissions from EVs are 25–40% lower on average than internal combustion vehicles.

 

Lower Operating Costs for Transit Agencies

For city transit departments and private fleet operators, the economic argument for switching to electric is gaining strength. While upfront costs for electric buses remain higher than their diesel counterparts, long-term operational savings help close the gap.

A 2023 report from BloombergNEF showed that electric minibuses can cost up to 45% less to operate over their lifecycle. Electricity is generally cheaper and more stable in price than diesel fuel, and EVs require less maintenance—no oil changes, fewer moving parts, and less wear on brakes due to regenerative braking systems.

In a real-world case, the city of Shenzhen, China—one of the first cities to fully electrify its public bus fleet—reported that its operating costs dropped by 30% per vehicle per year after adopting electric buses. Though most of these were full-sized, the trend holds true for small city bus models as well.

 

Better Suited for Urban Streets

City centers often present challenges like tight corners, narrow roads, and high foot traffic. Traditional large buses can struggle in these environments, especially on short, less crowded routes. This is where the small city bus—particularly the electric variant—comes into its own.

Electric minibuses are typically under 7 meters long, with a tighter turning radius and easier maneuverability. They’re ideal for feeder lines, downtown circulators, airport shuttles, or first-mile/last-mile connections to subway or train stations. Their compact size also makes them easier to park, reducing congestion at stops and depots.

A study by the European Commission on urban mobility projects found that cities introducing electric minibuses on less popular or secondary routes improved average route efficiency by 17%, largely due to better alignment between vehicle size and passenger volume.

 

Quiet Operation in Residential Zones

Noise pollution is a growing concern in many cities. Diesel buses, especially older models, are loud—reaching 85–90 dB under load. Over time, this constant background noise can contribute to stress and reduced quality of life for residents.

Electric minibuses operate much more quietly. According to Transport & Environment, most EV buses generate less than 65 dB of exterior noise during acceleration—comparable to normal street-level conversation. This makes them ideal for use in residential neighborhoods, hospital zones, and school areas where quiet operation is critical.

In Amsterdam, trials of electric minibus routes in older neighborhoods saw community complaints about noise drop by over 60%, leading the city to expand electric-only bus zones.

 

Improved Rider Experience

From a passenger perspective, electric minibuses provide a more comfortable ride. EVs accelerate smoothly and quietly, without the engine vibration or exhaust smells that many associate with diesel transit. Riders report a cleaner interior feel, and because EV buses often include newer technology, they’re more likely to feature conveniences like onboard Wi-Fi, USB charging ports, and low-floor access for wheelchairs and strollers.

A survey by Transport Focus in the UK found that passengers rated ride quality on electric buses 8.5 out of 10, compared to 6.9 for diesel buses. These higher satisfaction ratings were especially notable among older adults and parents traveling with children.

 

Flexibility for Different Urban Needs

City transit networks aren't one-size-fits-all. Some neighborhoods need high-capacity buses; others just need frequent service. The electric minibus gives planners more flexibility in route design without sacrificing environmental goals.

For example, a 5 gallon oval plastic paint bucket may not seem related—but think of it as an analogy. Just as that particular shape offers optimized space use and better pouring control, small-format electric buses offer a better fit for specific service needs without the excess of larger models.

In mixed-use districts, downtown cores, or even suburban routes with variable demand, these smaller buses allow transit agencies to maintain service frequency while avoiding running half-empty 12-meter buses. That’s a more efficient use of resources, both financially and environmentally.

 

Incentives and Infrastructure Are Catching Up

One major barrier to adopting EV buses in the past was infrastructure—but this is changing quickly. More public funding is being made available for charging stations, depot upgrades, and vehicle subsidies.

For instance, the U.S. Federal Transit Administration's Low or No Emission Vehicle Program allocated $1.7 billion in 2024 alone to help agencies buy electric and fuel-cell buses. Many of these funds are being directed toward small- to mid-size cities where electric minibus fleets can make the biggest impact quickly.

Additionally, new battery technology is extending the range of EV buses, with many modern minibuses offering 150 to 250 km per charge, which is more than sufficient for a full day’s operation in most urban routes.

 


As more cities commit to carbon reduction goals and improved public health, interest in electric mobility is no longer limited to flagship metro areas. The humble electric minibus, often overlooked in favor of high-profile transit solutions, is proving itself as a quiet, clean, and efficient workhorse—well-suited for the needs of modern urban life.

 

How does the clutch master cylinder work?

How does the clutch master cylinder work?
Working principle of hydraulic transmission system
As the power source of hydraulic clutch systems, the clutch master cylinder plays a vital role in ensuring smooth gear transitions.

The clutch master cylinder operates through three distinct working stages:
1. Pressure building stage
When the pedal is pressed, the push rod activates the main piston, compressing the hydraulic oil. At this point, the compensation hole closes, and system pressure increases linearly (0.7–1.2 MPa pressure is generated per millimeter of stroke). Many factory clutch master cylinder configurations now adopt a progressive pressure curve, enabling smoother initial pressure buildup to enhance driving comfort.
clutch main cylinder
2. Pressure transmission stage
The pressurized hydraulic oil travels to the clutch slave cylinder via reinforced nylon pipelines (typically 4.5–6mm in diameter). Transmission efficiency depends on:

Oil viscosity (DOT4 standard: ≤1800 mm²/s at -40°C)
Pipeline routing (bending radius > 5× pipe diameter)
System air removal (air pockets may cause up to 30% pressure loss)
Leading supplier clutch master cylinder manufacturers often test these parameters rigorously to ensure consistent quality across various vehicle platforms.

3. Pressure release stage
When the pedal is released, the return spring resets the piston, and the compensation hole reopens to stabilize the pressure. High-performance models might include a rapid oil return valve, reducing reset time to under 0.2 seconds.

Typical failure modes
Progressive failure – Worn seals cause slow pressure buildup (symptom: increased pedal travel)
Sudden failure – Cracks in the master cylinder lead to hydraulic leakage (ensure surface hardness ≥ HB80)
Temperature sensitivity – High temperatures may vaporize the fluid, softening pedal response

For models like the Ford Fiesta clutch master cylinder, it’s essential to select high-quality components from trusted suppliers to avoid premature failure.

Maintenance practice guide
Preventive maintenance:
Replace hydraulic oil every 2 years or 40,000 km
Check pedal free travel regularly (target: 10–15mm)
Use specialized tools (e.g., BET-300) for system bleeding
Modification precautions
Competition modifications require upgrading the sub-pump’s pressure tolerance
Quick-displacement kits must align with the clutch master cylinder’s oil delivery rate
Do not mix hydraulic oils of different specifications

Fault diagnosis process
A[Abnormal pedal] --> B{Pressure test}
B -->|Insufficient pressure| C[Check sealing system]
B -->|Normal pressure| D[Check mechanical connection]
C --> E[Replace maintenance kit]
D --> F[Adjust connecting rod mechanism]

What Are the Components of a Brake Master Cylinder?

What Are the Components of a Brake Master Cylinder?


The brake master cylinder is a critical part of any vehicle’s hydraulic brake system. It plays a key role in transforming the mechanical force from the brake pedal into hydraulic pressure, which ultimately activates the brake calipers or wheel cylinders. To understand how it functions effectively, it's important to look at the individual components that make up a brake master cylinder.
brake cylinder price

Here are the main parts that form a typical brake master cylinder:

Fluid Reservoir – Stores the brake fluid that supplies the master cylinder.


Reservoir Cover – This seals the top of the fluid reservoir, preventing contamination and fluid evaporation.

Filter Net – Positioned under the cover, it keeps dirt and debris from entering the hydraulic system.

Positioning Screw – Ensures precise alignment of internal parts during operation.

Rubber and Gasket – These components prevent leakage and maintain airtight seals within the cylinder.

Catch Bolt – Holds parts of the master cylinder assembly securely in place.

Piston and Spring 1 & 2 – Two piston-spring assemblies allow for dual-circuit operation, providing increased safety in the event of one circuit failing.

Retainer Ring – Keeps internal parts secured inside the cylinder bore.

Anti-Dust Cover – Protects the internal mechanism from dust and debris, extending the service life of the unit.

Each part plays a crucial role in ensuring smooth and responsive braking. A high-quality brake master pump relies on the precise engineering of these components to deliver safe, consistent braking performance.

When choosing a brake master cylinder supplier, quality should always be the top priority. KOMP is a trusted manufacturer specializing in the production of brake master cylinders, brake slave cylinders, clutch master cylinders, and clutch slave cylinders. With a reputation built on precision and durability, KOMP ensures every component meets high-performance standards.

For buyers seeking both reliability and value, KOMP offers factory price brake master cylinder that balance affordability with professional-grade quality. This makes them a preferred choice for automotive professionals, wholesalers, and repair shops around the world.

What is the function of the clutch slave cylinder?

What is the function of the clutch slave cylinder?
Although the clutch slave cylinder is small, it is an indispensable "hydraulic executive" for manual transmission cars. It silently assumes the role of a bridge between power transmission and interruption. Once it fails, the gear shifting will be frustrating at best, and the vehicle will break down at worst. This article will use popular language to analyze its working principle, core functions, and common faults to help you understand this "behind-the-scenes hero".
China clutch slave cylinder
1. "Switch" of Power Transmission
Separation: When the driver steps on the clutch pedal, the master pump pushes the slave pump piston through hydraulic oil, and the piston drives the release bearing to press against the pressure plate spring, so that the friction plate is separated from the flywheel and the engine power is cut off (the gear can be shifted smoothly at this time).

Engagement: After releasing the pedal, the hydraulic pressure disappears, the pressure plate re-clamps the friction plate, and the power is restored. A high-quality factory clutch slave cylinder ensures this process runs reliably every time.

2. "Amplifier" of Operating Force
The hydraulic system amplifies the pedal force through the cylinder diameter difference between the main pump and the slave pump (usually the slave pump has a larger diameter), so that the driver only needs to step lightly to complete the clutch operation, avoiding the laborious problem of traditional mechanical levers. This mechanical ease is largely thanks to the hydraulic clutch slave cylinder, which offers both sensitivity and durability.

3. Working Principle: Exquisite Cooperation of Hydraulic Transmission
Step on the pedal: the master cylinder compresses the hydraulic oil → the oil pipe transmits pressure → the piston of the slave cylinder extends → pushes the release fork and bearing;
Shifting stage: the pressure plate is separated from the flywheel, the input shaft of the transmission stops, and the impact-free shifting is achieved;
Release the pedal: the spring in the slave cylinder resets, the hydraulic oil flows back, and the pressure plate re-presses the friction plate.

Whether you are replacing a single unit or sourcing from a wholesale clutch slave cylinder supplier, understanding how this component works can help ensure the correct part is chosen.

4. Fault Warning: Typical Manifestations of Slave Cylinder Abnormality
Incomplete separation: difficult shifting, gearbox gear slapping (slave cylinder oil leakage or piston jamming leads to insufficient pressure);
Clutch slippage: weak acceleration, increased fuel consumption (slave cylinder return is poor, the pressure plate is not fully engaged);
Soft pedal: hydraulic system air intake or oil leakage, need to be emptied or replaced in time

5. Maintenance Tips
Check the hydraulic oil regularly: replace/replenish the oil in time when it is turbid or insufficient;
Beware of oil stains: oil stains on the housing of the slave pump may indicate aging of the seal ring;
Operation habits: avoid pressing the clutch for a long time in the semi-clutch state to reduce the load on the slave pump.

The clutch slave cylinder is like a precise "mediator", coordinating the "separation and combination" of the engine and the transmission. Understanding its role can not only help car owners troubleshoot faults in time but also improve the overall understanding of the vehicle's transmission system. If your car has abnormal shifting, you may wish to check this hidden but critical component first—especially if considering a factory clutch slave cylinder upgrade or sourcing a hydraulic clutch slave cylinder replacement for optimal performance.

Who Is the Largest Electric Bus Manufacturer in China?

China has rapidly become a global leader in the new energy vehicles industry, driven by innovation, policy support, and an urgent commitment to reducing carbon emissions. Among the many players in this competitive landscape, one name consistently rises to the top when it comes to Electric City Bus manufacturing - King Long. With decades of experience and a forward-looking vision, King Long has established itself as a key figure in shaping the future of urban mobility.

As global cities transition to greener public transportation, demand for New Energy Electric City Bus solutions has surged. Chinese manufacturers have led this shift, offering high-efficiency, low-emission vehicles tailored for urban environments. King Long has stood out for its continuous investment in R&D, intelligent manufacturing, and cutting-edge energy technologies, making it one of the largest and most trusted electric bus producers in the country.

King Long's Electric City Bus portfolio is known for reliability, performance, and innovative design. The company offers a wide range of models suited for various city routes and passenger needs. Whether it's a compact shuttle for narrow streets or a full-sized articulated bus for high-traffic routes, King Long's solutions are engineered to deliver efficient and eco-friendly service. Their buses are also equipped with intelligent driving systems, battery management technologies, and lightweight materials, ensuring optimal safety and energy efficiency.

When discussing China's top contributors to the new energy vehicles movement, King Long ranks among the elite. The company is not only one of the top electric bus manufacturers in China but also holds a leading position within the broader Chinese automotive industry. Its market coverage spans across major Chinese cities and more than 160 countries and regions globally, showcasing its international competitiveness and strong production capacity.
Electric City Bus Manufacturer
Beyond product performance, King Long new energy vehicles are recognized for their sustainability, cost-effectiveness, and technological advancement. Features such as fast-charging capabilities, extended battery life, and low operating costs make their electric city buses an ideal choice for public transport operators worldwide. King Long's commitment to a greener future and smart mobility continues to push the boundaries of what's possible in urban transportation.

Unlocking the Potential of Pitcher Water Filters A Strategic Guide for Wholesalers and OEM/ODM Clients

In the evolving landscape of water purification, pitcher water filters have emerged as a preferred choice for consumers seeking convenience and efficiency. For businesses, this trend presents a lucrative opportunity to expand product lines and meet growing market demands. Partnering with a reputable OEM water filter manufacturer can be the key to capitalizing on this potential.

 

 

Why Pitcher Water Filters Are Gaining Traction

 

Pitcher water filters offer a blend of simplicity and effectiveness, making them appealing to a broad consumer base. Their ease of use, affordability, and portability cater to the needs of households, offices, and students alike. As awareness of water quality issues rises, so does the demand for reliable filtration solutions.

 

The Advantages of OEM and ODM Partnerships

 

Collaborating with an experienced OEM water filter manufacturer provides businesses with access to specialized expertise and production capabilities. Such partnerships enable the development of customized products that align with brand identities and meet specific market requirements. From design to packaging, OEM and ODM services offer comprehensive solutions that streamline the product development process.

 

Customization: Meeting Diverse Market Needs

 

In a competitive market, differentiation is crucial. Offering custom water filter pitchers allows businesses to tailor products to various consumer preferences and regional standards. Customization options may include:

  • Design Variations: Adjusting shapes, colors, and materials to match brand aesthetics.

  • Filtration Capabilities: Incorporating specific technologies to address local water quality issues.

  • Packaging Solutions: Developing unique packaging that enhances shelf appeal and brand recognition.

By providing tailored solutions, businesses can better serve their customers and establish a competitive edge.

 

Ensuring Quality and Compliance

 

Quality assurance is paramount in the water filtration industry. Partnering with manufacturers that offer NSF certified pitcher water filters ensures compliance with international safety and performance standards. Certifications such as NSF 42, 53, and 401 attest to a product's ability to effectively reduce contaminants, providing consumers with confidence in their purchase.

 

Capitalizing on Wholesale Opportunities

 

For large-scale distributors and retailers, engaging in water filter pitcher wholesale can lead to significant cost savings and supply chain efficiencies. Bulk purchasing not only reduces per-unit costs but also ensures consistent product availability to meet consumer demand. Establishing relationships with reliable suppliers is essential for maintaining inventory levels and fulfilling market needs promptly.

 

Conclusion

 

The rising demand for pitcher water filters presents a strategic opportunity for businesses to expand their product offerings and capture new market segments. By leveraging OEM and ODM partnerships, focusing on customization, ensuring quality compliance, and exploring wholesale avenues, companies can position themselves for sustained growth in the water filtration industry.

 

For more information on how to develop and source high-quality pitcher water filters tailored to your business needs, please contact us.