A10VSO71 DR/31R-PPA42N00 A10VSO71 DG/31R-PPA12N00 Mechanically Shaft Driven Pump

High-temperature adaptation measures:

① Seal upgrade: Replace standard NBR seals with FKM (Viton) seals (order code suffix "FH") to resist heat degradation

② Oil selection: Use high-temperature hydraulic oil (e.g., Rexroth HLP-S 68) with viscosity index ≥140 to maintain lubricity

③ Cooling system: Install an oil cooler (capacity ≥5 kW) to keep case drain temperature ≤90°C

④ Component protection: Apply heat-resistant paint to the pump housing to prevent corrosion

⑤ Maintenance adjustment: Shorten oil change intervals to 3 months (from 6 months) and inspect bearings monthly for wear

Low-temperature solutions:

① Oil selection: Use low-viscosity, cold-resistant oil (e.g., Rexroth HLP 32) with pour point ≤-30°C

② Preheating: Install an electric heater (2 kW) in the tank to heat oil to ≥10°C before startup

③ Seal upgrade: Replace NBR seals with HNBR seals (order code suffix "HN") to avoid hardening

④ Insulation: Wrap the pump and lines with thermal insulation material (e.g., fiberglass) to reduce heat loss

⑤ Startup procedure: Jog the motor 10 times (5s each) before full startup to distribute oil evenly