GENERATOR AR 4W8957 - Caterpillar

Illustration 1 g00581163
Note: The following specifications are for a bench test. The specifications for a pump that is tested on the machine may be different.The rotation is counterclockwise, when the pump is viewed from the drive end.This is a vane pump.For testing, use SAE 10W at 65 °C (149 °F).Small Section of Pump (Drive End)Test at full speed Output ... 75 L/min (21 US gpm) Pressure ... 690 kPa (100 psi) Pump speed ... 2000 rpm Engine speed ... 2000 rpm Output ... 70 L/min (20 US gpm) Pressure ... 6900 kPa (1000 psi) Pump speed ... 2000 rpm Engine speed ... 2000 rpmTest at Half Speed Output ... 40 L/min (10 US gpm) Pressure ... 690 kPa (100 psi) Pump Speed ... 1000 rpm Engine Speed ... 1000 rpm Output ... 35 L/min (9 US gpm) Pressure ... 6900 kPa (1000 psi) Pump Speed ... 1000 rpm Engine Speed ... 1000 rpmLarge Section of Pump (Cover End)Test at Full Speed Output ... 95 L/min (24 US gpm) Pressure ... 690 kPa (100 psi) Pump Speed ... 2000 rpm Engine Speed ... 2000 rpm Output ... 90 L/min (23 US gpm) Pressure ... 6900 kPa (1000 psi) Pump Speed ... 2000 rpm Engine Speed ... 2000 rpmTest at Half Speed Output ... 45 L/min (12 US gpm) Pressure ... 690 kPa (100 psi) Pump Speed ... 1000 rpm Engine Speed ... 1000 rpm Output ... 45 L/min (11 US gpm) Pressure ... 6900 kPa (1000 psi) Pump Speed ... 1000 rpm Engine Speed ... 1000 rpm (1) Torque for four bolts ... 61 7 N m (45 5 lb ft) (2) Torque for four bolts ... 95 14 N m (70 10 lb ft)