HiTEC® 521

Anti-wear Hydraulic Additive Package
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Key Performance Benefits

This package provides simplicity to the oil blender. HiTEC® 521 finished fluid delivers the following benefits:

  • Performance : Extends drain intervals by prolonging fluid life; Improves equipment reliability by protecting critical parts; Performs in demanding conditions where water is present
  • Value : Helps reduce down time; Supports enhanced productivity; Simplifies logistics through scalable performance
  • Reassurance : Approved by all major pump OEMs, including the latest most challenging Bosch Rexroth requirement; Recommended by customers around the world; More than 20 years proven field performance


Designed for all types of hydraulic equipment, including modern hydraulic high pressure pumps and systems, HiTEC® 521 meets or exceeds the performance requirements of all major mainstream hydraulic equipment manufacturers and industry organization specifications. In a finished hydraulic fluid, HiTEC® 521 has the capability to provide performance reserve, leading to a problem free life of both equipment and fluid.

Handling Information

Max Handling Temp: 75˚C
Shelf Life: 24 months at ambient temperature

Performance Profile

HiTEC® 521 is capable of meeting the following specifications in suitable base stocks and viscosity grades:
  • Bosch Rexroth RDE 90235
  • Parker (formerly Denison) HF-0, HF-1, HF-2 (HM, HV)
  • Eaton E-FDGN-TB002-E
  • Fives P68, P69, P70 (HM, HV)
  • DIN 51524-2 (HM); DIN 51524-3 (HV)
  • ISO 11158 (HM, HV)
  • GB 11118.1-2011 (L-HL, L-HM, L-HV, L-HS)
  • ASTM D6158 (HM, HV)
  • SAE MS 1004 (HM, HV)
  • JCMAS P041 HK Hydraulic specification
  • GM LS-2
  • AIST 126, 127
  • SEB 181222



Typical Characteristics


Recommended Dosage

The recommended treat rate for HiTEC® 521 is 0.85% by weight. Higher and lower doses may also be used depending on the required performance claims and the base oil. Suitable for use in Group I and II base oils. Suitable for use in multigrade (HVI/HVLP) fluid formulations. A suitable viscosity index improver such as the HiTEC® 5785 family must be used in order to formulate such fluids. Please contact your Afton Chemical representative for specific recommendations.