Hydraulics at Putzmeister
Approved Hydraulic Fluids
Mineral hydraulic fluids
- As a general rule, only mineral hydraulic fluids of type HLP may be used for concrete pumps and industrial technologies. These hydraulic fluids must also meet the minimum requirements of DIN 51524-2.
- The use of H, HL, HLPD or HVLPD fluids, as well as zinc-free hydraulic oils, is prohibited.
- As standard, the viscosity grade ISO VG 46 has to be used (range from -10°C to 90°C).
- Only fluids that meet the minimum requirements of DIN 51524-2 and these Putzmeister specifications for the viscosity grade ISO VG 46 and are confirmed in writing by the manufacturer may be used.
Confirmed mineral hydraulic fluids
ISO VG 46 (Range of application -10°C to 90°C): As a standard use viscosity grade ISO VG 46.
- ADDINOL Hydraulic Oil HLP 46
- ARAL Vitam GX 46
- AVILUB HLP 46
- AVILUB Hydraulic PM 46
- Benz Oil PTL 46
- BP Energol HLP-HM 46
- Castrol Hyspin AWS 46
- Fuchs Renolin B 46 CP
- Liqui-Moly HLP 46 SG-Z
- Mobil DTE 25
- Petro-Canada HYDREX AW 46
- SRS Wiolan HS 46
- Total Azolla ZS 46
- Shell Tellus S2 MX 46
- STRUB Vulcolube HLP 46
ISO VG 32 (Range of application -15 °C to 80 °C): Due to lower viscosity, the maximum temperature limit of the machine must be adjusted to 80°C (90°C standard).
- ADDINOL Hydraulic Oil HLP 32
- Agip PRECIS HLP 32
- Benz Oil PTL 32
- BP Energol HLP-HM 32
- Castrol Hyspin AWS 32
- Mobil DTE 24
- Total Azolla ZS 32
ISO VG 68 (Range of application 0°C to 95°C): Due to higher viscosity, the maximum temperature limit of the machine may be adjusted to 95°C (90°C standard).
- ADDINOL Hydraulic Oil HLP 68
- Agip Precis HLP 68
- ARAL Vitam GX 68
- AVILUB HLP 68
- Benz Oil PTL 68
- BP Energol HLP-HM 68
- Castrol Hyspin AWS 68
- MAK HYDROL HLP 68
- Mobil DTE 26
- SRS Wiolan HS 68
- Total Azolla ZS 68
- Shell Tellus S2 MX 68
Bio-degradable hydraulic fluids
- As a general rule, only bio-degradable hydraulic fluids of category 4 (HEES – synthetic ester) of DIN ISO 15380 and viscosity grade ISO VG 46 may be used for concrete pumps and industrial technologies. These hydraulic fluids must also meet the minimum requirements of this standard.
- Only fluids that meet the minimum requirements of DIN ISO 15380 and these Putzmeister specifications for the viscosity grade ISO VG 46 and are confirmed in writing by the manufacturer may be used.
Confirmed bio-degradable hydraulic fluids:
- Bechem Hydrostar HEES 46
Download: Approved Hydraulic Fluids Brochure
Free-flow Hydraulics
Benefits at a glance
- More power and less energy lost
- High efficiency
- While valves interrupt the oil flow on other systems, the intelligent control directs the oil into the drive cylinders without significant losses
- Expensive control blocks are not required which avoids the oil heating up and makes servicing easier
- Powerful and convenient operation
Today concrete pumps are predominantly operated by hydraulic systems. Putzmeister places its trust in the benefits of free-flow hydraulics because the most important performance factors are the concrete pressure, low-loss oil delivery and costs.
When large quantities of concrete are pumped, large quantities of oil also flow inside the hydraulic system. More power is transferred inside a closed free-flow hydraulic circuit because the oil is conveyed from the pump to the drive cylinders without loss. The adapted hydraulic System ensures extremely powerful interaction between components. Compared to the open circuit, this ingenious drive technology requires significantly less oil and does not generate as much heat. The system is also economical to operate because it achieves a high degree of energy efficiency and is easy to service.