Rock CHF Fluid 1 Litre for Power Steering and ACE Systems Land Rover STC50519

Rock CHF Fluid 1 Litre is a high-performance fully synthetic hydraulic fluid designed for use in power steering and ACE (Active Cornering Enhancement) systems on specific Land Rover models.

Often referred to as cold climate PAS fluid or central hydraulic fluid (CHF), this specialist fluid is essential for maintaining correct hydraulic pressure, smooth steering response and reliable system operation across a wide temperature range.

This fluid meets the requirements of Land Rover specification STC50519 and is suitable for vehicles that specifically require CHF-type hydraulic fluid.

Key Features

• Fully synthetic central hydraulic fluid for power steering and ACE systems
• Wide operating temperature range from -40°C to over 130°C
• Excellent viscosity stability for consistent hydraulic performance
• Helps reduce noise, wear and system strain
• Suitable replacement for Pentosin CHF 11S and CHF 202
• Designed for long service life in demanding conditions

Why Using the Correct Fluid Matters

Systems designed for CHF fluid are highly sensitive to fluid type. Unlike standard power steering fluid or ATF, CHF is engineered to maintain precise hydraulic pressure and flow under extreme conditions.

Using the wrong fluid can lead to:

• Noisy or heavy steering
• Poor ACE system performance
• Premature wear of pumps and valves
• Potential system damage

Using the correct STC50519 specification fluid helps ensure smooth operation and long-term reliability.

Specifications

• Land Rover equivalent part number: STC50519
• Product code: ROCHF1L
• Capacity: 1 litre
• Type: Fully synthetic central hydraulic fluid (CHF)

Meets or Exceeds Specifications

• Land Rover STC50519 (Cold Climate PAS Fluid)
• Land Rover LRN2261
• DIN 51 524 T3
• ISO 7308
• Ford WSS-M2C204-A
• ZF TE-ML 02K

Vehicle Compatibility

Suitable for Land Rover vehicles that require STC50519 or CHF specification hydraulic fluid.

Common applications include:

• Defender 1987–2006
• Defender 2007–2016
• Discovery 2 1998–2004, including ACE-equipped vehicles
• Discovery 3 2005–2009
• Discovery 4 2010–2016
• Range Rover L322 2002–2012
• Range Rover 2013
• Range Rover Sport L320 2005–2013
• Range Rover Sport 2014

Important: Always check your vehicle specification, VIN application or existing fluid before ordering, as some models and systems may use a different type of power steering fluid.

About Rock Oil

Rock Oil is a UK-based lubricant specialist with strong motorsport heritage, producing high-quality oils and fluids designed to perform reliably in demanding conditions.

Maintain smooth steering performance and protect your hydraulic systems with the correct specification fluid. Buy from JGS4x4 for fast UK delivery.