Seat

2.3 Hydraulic system

Auxiliary hydraulics oil flow Hydraulics

Pump

Flow rate

Control valve American tier 2 (up to AE02803)

American tier 3A (from AG00573)

Model 38Z3

Double variable displacement pump + twin gear pump 2 x 16 + 10.5 + 4.5 cm3/rev (2 x 1.0 + 0.64 + 0.27 in3/rev) PVD-2B44BP-16G5-4713F Double variable displacement pump + gear pump 2 x 16 + 10.5 + 4.5 cm3/rev (2 x 1.0 + 0.64 + 0.27 in3/rev) PVD-1B-34BP-10G5 2 x 40 + 26.3 + 11.3 l/min (2 x 11 + 7 + 3 gal/min) at 2500 rpm 11 sections/12 sections (3rd control circuit)

Main pressure limiting valve for pumps P1, P2 240 ±3 bar (3481±44 psi)

Main pressure limiting valve for pump P3 Secondary pressure limiting valve for main valve block Main pressure limiting valve for pilot control pressure

210 ±3 bar (3046±44 psi) 275 -0/+0.5 bar (3989 -0/+7 psi) at 20 l/min (5.3 gal/min) 35 +1 bar (508 ± 14.5 psi)

Main pressure limiting valve for swivel unit engine pressure restriction 210 +3 bar (3046 ±44 psi) Hydraulic oil radiator Hydraulic tank capacity Standard 45 l (12 US gal.) 2nd speed shift pressure 180 bar (2611 psi) Gear motor braking deceleration time 3.7 -1.2/+1.2 s at 50 °C/122 °F oil temperature Circulation pressure P1, P2 15.5 bar (224.8 psi)/12.5 bar (181.3 psi) Circulation pressure P3 18 bar (261 psi)

Pressure (bar/psi) P2 + P3 (l/min/gal/min) P2 (l/min/gal/min) 15 / 218 65.5 / 17.3 40.5 / 10.7 40 / 580 64 / 16.9 40 / 10.6 60 / 870 62.5 / 16.5 39 / 10.3 90 / 1305 56 / 14.8 38.5 / 10.2 120 / 1740 50.5 / 13.3 37.5 / 9.9 150 / 2176 43.7 / 11.5 33.5 / 8.8 180 / 2611 37 / 9.8 29 / 7.7 200 / 2901 16 / 4.2 27 / 7.1

Notice!

Output indications for auxiliary hydraulics with unpressurized return line.

Adjustment – see Flow rate adjustment of auxiliary hydraulics on page 5-13