Front Bucket Crowd Hydraulic Cylinder 556/60421 for JCB 3CX 4CX, Complete with Reset Bracket70*40 Overview

This 556/60421 front bucket crowd hydraulic cylinder is engineered to match JCB 3CX and 4CX backhoe loaders, with standard specification 70mm bore × 40mm rod diameter and complete factory-style bucket reset bracket included.Constructed with precision-honed cylinder barrel and induction-hardened piston rod, the component features built-in end cushioning to dampen retraction shock during bucket operation. Strictly produced per OEM dimensional standards, it enables direct plug-and-play replacement of original damaged cylinders without extra modification, effectively lowering equipment maintenance downtime. Designed to withstand 250bar regular working pressure and peak pressure up to 320bar, it delivers stable long-term performance under harsh construction site working conditions.

Features and Benefits

• OEM dimensional design, direct fit for JCB 3CX/4CX, no extra machining for quick installation.

• Complete with matched reset bracket, saves extra accessory purchasing cost.

• Precision honed barrel + induction-hardened rod, outstanding wear resistance and long service life.

• Built-in cushion structure reduces retraction impact, protects seals and extends cylinder lifespan.

• Premium sealing assembly effectively prevents hydraulic oil leakage under frequent heavy-load operation.

• Stable performance under 250bar rated pressure, max 320bar withstand for rugged construction conditions.

Specifications of 556/60421- Hydraulic Cylinder

• Part No.: 556/60421

• Application: JCB 3CX, 4CX Backhoe Loader

• Bore × Rod: 70mm × 40mm

• Rated Working Pressure: 250 bar (3625 PSI)

• Max Pressure: 320 bar (4640 PSI)

• Standard Hydraulic Oil: ISO VG46 anti-wear hydraulic oil

• Normal Operating Speed: 0.1~0.5m/s

• Configuration: Equipped with complete bucket reset bracket, built-in end cushion

Applications

• Designed for JCB 3CX.4CX backhoe loaders

• Mainly used as lift cylinder for loader lifting mechanism

• Suitable for construction sites, farm yards, road maintenance and material handling work

• Ideal for various heavy-load lifting and operating scenarios

Packaging & Delivery

556/60421 Hydraulic Cylinder are typically packaged securely to prevent damage during transit. The packaging includes:

Protective Wrapping: To safeguard the pump from environmental damage.

Custom Crates: For larger, heavier pumps, ensuring safe handling.

Documentation: Includes installation, maintenance instructions, and warranty details.

Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.

556/60421 Hydraulic Cylinder FAQ:

1. What is the 556/60421 Hydraulic Cylinder ?

• Made with precision honed barrel and induction-hardened piston rod for superior wear resistance.

• Fitted with complete bucket reset bracket for easy mounting on JCB 3CX/4CX.

• Built-in cushion lessens impact during bucket retraction to safeguard internal seals.

• Adopts high-quality seal kits to stop oil leakage under frequent heavy-duty work.

• Produced to OEM dimensions for seamless direct replacement of original cylinder.
  
  

3. What is the working pressure range of 556/60421 Hydraulic Cylinder ?

The 556/60421 Hydraulic Cylinder is designed for medium and high-pressure hydraulic systems:

• Normal working pressure: 180–250 bar (2610–3625 PSI)

• Rated pressure: 250 bar (3625 PSI)

• Maximum allowable pressure: 320 bar (4640 PSI)
  
  

4. Can 556/60421 Hydraulic Cylinder replace other brands?

• It can replace other brand cylinders only if installation size, bore/rod dimension and working pressure are identical. It is a direct OEM replacement for original JCB 3CX/4CX crowd cylinder.
  
  

5. What hydraulic oil is recommended for 556/60421 Hydraulic Cylinder ?

• ISO VG46 anti-wear hydraulic oil is the standard choice for regular ambient temperature.
  

• Use ISO VG32 for cold climate and ISO VG68 for high-temperature working environment。

• Normal operating speed ranges from 0.1 to 0.5 m/s; do not exceed 0.6 m/s to avoid damage to cushions and seals.

7. Do you provide OEM or customized services?

• Custom & OEM manufacturing options are available. We can produce cylinders according to your part numbers, technical drawings and personalized specifications.

8. How can I get a quotation quickly

Please provide the following details:

• Model or displacement

• Working pressure

• Speed

• Quantity
  We will reply within 12 hours with a competitive quotation.

  
  

Certifications & Quality Assurance

556/60421 Hydraulic Cylinder are manufactured in compliance with international standards, ensuring high performance and reliability:

ISO 9001: Certified for quality management systems.

CE Certification: Ensures compliance with European safety, health, and environmental protection standards.

RoHS Compliance: Ensures the pump does not contain hazardous materials.

Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.

FAQ

1.What's our advantages?

Factory established in 2005;

With a great deal of production experience;

80+ employees become the professional team;

Constant updated ERP system ensure efficiency of work;

Sophisticated equipment ehanced the accuracy of products;

Professional salesmen provide the greast service;

With a large number of famous customers all over the world;

Great after-sales service;

With the long term cooperation with famous logistics and express company in China,provide the better goods service.

2.What is your payment terms?

Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.

3.Can you make my own brand on the products?

Of course we can. Just send me your logo  we can make it for you.

4.What is our main export market?

America(40.5%):USA, Canada, Argentina, Brazil

Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.

Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.

Others(5.8%).

The Green hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.

The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.