980G Wheel Loader Hydraulic System Caterpillar

Illustration 1	g00470406

(1) Torque for the four bolts ... 108 ± 7 N·m (80 ± 5 lb ft)

(2) Torque for the four bolts ... 22 ± 3 N·m (16 ± 2 lb ft)

(3) Torque for the four bolts ... 95 ± 7 N·m (70 ± 5 lb ft)

(4) Torque for the four bolts ... 359 ± 14 N·m (265 ± 10 lb ft)

The relief valve pressure setting is 15800 kPa (2300 psi) at 2100 rpm.

The rotation of the shaft is counterclockwise when the pump is viewed from the drive end.

For testing purposes, use SAE 10W oil at 65°C (150°F).

Drive End Section of the Pump (Implement)

Test at Full Speed:

Output ... 360 L/min (95 US gpm)

Pressure ... 690 kPa (100 psi)

Pump speed ... 2100 rpm

Engine speed ... 2100 rpm

Output ... 324 L/min (85.5 US gpm)

Pressure ... 6900 kPa (1000 psi)

Pump speed ... 2100 rpm

Engine speed ... 2100 rpm

Test at Half Speed:

Output ... 180 L/min (47.5 US gpm)

Pressure ... 690 kPa (100 psi)

Pump speed ... 1050 rpm

Engine speed ... 1050 rpm

Output ... 162 L/min (43 US gpm)

Pressure ... 6900 kPa (1000 psi)

Pump speed ... 1050 rpm

Engine speed ... 1050 rpm

Center Section of the Pump (Implement)

Test at Full Speed:

Output ... 105 L/min (28 US gpm)

Pressure ... 690 kPa (100 psi)

Pump speed ... 2100 rpm

Engine speed ... 2100 rpm

Output ... 95 L/min (25 US gpm)

Pressure ... 6900 kPa (1000 psi)

Pump speed ... 2100 rpm

Engine speed ... 2100 rpm

Test at Half Speed:

Output ... 53 L/min (14 US gpm)

Pressure ... 690 kPa (100 psi)

Pump speed ... 1050 rpm

Engine speed ... 1050 rpm

Output ... 48 L/min (12.5 US gpm)

Pressure ... 6900 kPa (1000 psi)

Pump speed ... 1050 rpm

Engine speed ... 1050 rpm

Cover End Section of the Pump (Fan Drive)

Test at Full Speed:

Output ... 69 L/min (18 US gpm)

Pressure ... 690 kPa (100 psi)

Pump speed ... 2100 rpm

Engine speed ... 2100 rpm

Output ... 62 L/min (16 US gpm)

Pressure ... 6900 kPa (1000 psi)

Pump speed ... 2100 rpm

Engine speed ... 2100 rpm

Test at Half Speed:

Output ... 35 L/min (9 US gpm)

Pressure ... 690 kPa (100 psi)

Pump speed ... 1050 rpm

Engine speed ... 1050 rpm

Output ... 31 L/min (8 US gpm)

Pressure ... 6900 kPa (1000 psi)

Pump speed ... 1050 rpm

Engine speed ... 1050 rpm