AD55B Underground Articulated Truck Hydraulic System Caterpillar

Illustration 1	g01304807

Rotation ... Clockwise

(1) Torque for plug ... 127 N·m (90.0 lb ft)

(2) Torque for plug ... 190 N·m (140.0 lb ft)

Displacement ... 45 cc

Control Range at 400 mA ... 23500 kPa (3400 psi)

Control Range at 1200 mA ... 1800 kPa (260 psi)

Standby Pressure ... 1800 ± 100 kPa (260 ± 14.5 psi)

Pressure Cutoff ... 23500 ± 350 kPa (3400 ± 50 psi)

Test at Full Speed:

Output ... 92.6 L (24.46 US gal)

Pressure ... 690 kPa (100 psi)

Pump speed ... 2100 rpm

Output ... 90.72 L (23.96 US gal)

Pressure ... 6900 kPa (1000 psi)

Pump speed ... 2100 rpm

Test at Half Speed:

Output ... 46.3 L (12.23 US gal)

Pressure ... 690 kPa (100 psi)

Pump speed ... 1050 rpm

Output ... 45.36 L (11.98 US gal)

Pressure ... 6900 kPa (1000 psi)

Pump speed ... 1050 rpm