Chevrolet 70 Series 1970 Service Manual page 713

STEERING SYSTEM 9-34
LEGEND
DISCHARGE OIL
SUPERCHARGE OIL
HIGH PRESSURE OIL
RESERVOIR AND RETURN OIL
RING-ROTOR LEAKAGE OIL
VIEW A-PUM P OPERATION-LOW SPEED
12
VIEW B-PUMP OPERATION-HIGH SPEED
Figure fi—Power Steering Hydraulic Pump Operation
CHEVROLET SERIES 70-90 HEAVY DUTY TRUCK SHOP MANUAL
T-1166