Telescopic handlers (also known as telehandlers) are versatile machines used in agriculture, construction, and material handling. Their hydraulic systems enable critical functions such as boom extension/retraction, lifting, steering, stabilizer deployment, and attachment control. Below is a detailed breakdown of hydraulic components and high-market-share products with specific models:

1. Hydraulic Pumps

Role: Generate fluid flow to power cylinders, motors, and steering systems.
Common Types:

• Gear pumps (fixed displacement for simplicity and cost-effectiveness).

• Axial piston pumps (variable displacement for energy efficiency in high-pressure systems).
  Top Models:

• Bosch Rexroth A10VO Series (e.g., A10VO 45/71) – Widely used for boom and steering circuits.

• Eaton 7000 Series (e.g., 7031, 7045) – High-pressure piston pumps for heavy lifting.

• Parker Hannifin PGP Series (e.g., PGP505) – Compact gear pumps for auxiliary functions.

• Danfoss 90 Series – Closed-circuit pumps for energy-efficient load-sensing systems.

2. Hydraulic Cylinders

Role: Extend/retract the boom, lift loads, and operate stabilizers.
Common Types:

• Telescopic cylinders (multi-stage for long boom reach).

• Double-acting cylinders (for precise load control and stabilizer legs).
  Top Models:

• Parker Hannifin DP Series – High-strength telescopic cylinders for boom extension.

• Eaton CMA Series – Corrosion-resistant cylinders for stabilizers in harsh environments.

• Bosch Rexroth CDL1 Series – Compact cylinders for steering and attachment tilt.

• Hydac HSK Series – Customizable stroke cylinders for stabilizer deployment.

3. Hydraulic Motors

Role: Drive wheels, power attachments (e.g., rotators), and operate cooling fans.
Common Types:

• Orbital motors (high torque for wheel drives).

• Gear motors (simple, durable for auxiliary functions).
  Top Models:

• Eaton Char-Lynn S Series (e.g., SAA25) – High-torque motors for drivetrains.

• Danfoss OMM/OMV Series – Gear motors for hydraulic cooling fans and rotators.

• Parker Hannifin F11/F12 Series – Orbital motors for precise attachment control.

4. Directional Control Valves

Role: Regulate fluid flow to control boom movement, steering, and stabilizers.
Common Types:

• Proportional valves (for smooth, precise boom control).

• Solenoid valves (automated functions like attachment operation).
  Top Models:

• Bosch Rexroth 4WRPEH Series – Proportional valves for boom positioning.

• Danfoss PVG Series – Load-sensing valves with integrated electronics.

• Parker D1VW Series – Manual spool valves for stabilizer systems.

5. Hydraulic Hoses & Fittings

Role: Transport fluid under high pressure while accommodating boom movement.
Key Features: Flexibility, abrasion resistance, and high burst pressure.
Top Models:

• Parker 79SC Series – Thermoplastic hoses for tight bending radii.

• Gates Global Spiral – Reinforced hoses for boom extension circuits.

• Eaton Aeroquip FC332 – Lightweight hoses for mobile applications.

6. Load-Sensing Systems

Role: Optimize pump output to match load demands, improving fuel efficiency.
Top Models:

• Danfoss PVED Series Valves – Integrated load-sensing for boom and steering circuits.

• Bosch Rexroth LUDV Systems – Ensures balanced flow in multi-function operations.

7. Hydraulic Power Units (HPUs)

Role: Compact systems integrating pumps, motors, and reservoirs for auxiliary functions.
Top Models:

• Bosch Rexroth CytroPac – Modular HPUs with noise reduction.

• Parker Hannifin Custom HPUs – Tailored for attachment power (e.g., rotators, grapples).

8. Accumulators

Role: Stabilize pressure, absorb shocks, and provide emergency functions (e.g., boom lowering).
Common Types: Bladder or piston accumulators.
Top Models:

• HYDAC SB Series – Bladder accumulators for emergency systems.

• Eaton LA Series – Piston accumulators for high-pressure circuits.

9. Hydraulic Filters & Reservoirs

Role: Maintain fluid cleanliness and storage.
Top Models:

• Donaldson P Series – High-efficiency return-line filters.

• HYDAC HDU Series – Suction filters with contamination sensors.

• Parker Hannifin Compact Reservoirs – Integrated breathers and baffles.

10. Proportional Pressure Relief Valves

Role: Prevent overloads and enable adjustable force limits for safe operation.
Top Models:

• Sun Hydraulics RPEC Series – Adjustable relief valves for boom circuits.

• Bosch Rexroth DBET Series – Proportional valves for precision pressure control.

Key Manufacturers with High Market Share

1. Bosch Rexroth – Leading in pumps, valves, and load-sensing systems.

2. Eaton – Dominant in motors, cylinders, and filtration.

3. Parker Hannifin – Top supplier of cylinders, valves, and custom HPUs.

4. Danfoss – Innovator in energy-efficient load-sensing and IoT-ready systems.

5. HYDAC – Specialized in filtration, accumulators, and cooling solutions.

Application Examples

• Boom Extension/Retraction: Parker DP Series telescopic cylinders powered by Bosch Rexroth A10VO pumps.

• Steering System: Eaton Char-Lynn SAA25 motors controlled by Danfoss PVG valves.

• Stabilizers: HYDAC HSK cylinders with Sun Hydraulics RPEC relief valves for safe deployment.

• Attachments: Danfoss OMM motors driving rotators or grapples via Parker F11/F12 orbital motors.

Industry Trends

• Electro-Hydraulic Integration: Danfoss PLUS+1 and Bosch Rexroth IoT systems enable remote diagnostics and predictive maintenance.

• Energy Efficiency: Load-sensing pumps and regenerative circuits reduce fuel consumption.

• Compact Designs: Lightweight components from Parker and HYDAC for improved machine maneuverability.

Major telehandler brands like JCB, Caterpillar, Manitou, and Merlo rely on these hydraulic components to ensure reliability, lifting precision, and compliance with global safety standards.