Pump Pressure
Install a suitable pressure gauge between pump and pressure line at pump, then with gauge valve open and engine at idle speed, turn wheels against stops to bring fluid to operating temperature. With wheels against stops, pressure should not be less than specified in table below.
CAUTION:
Do not hold wheels against stops for more than 5 seconds.
If pressure is below specifications, slowly close valve and check for pressure increase. Pressure will increase if pump is in good condition. If pressure does not increase with valve closed, pump is faulty.
CAUTION:
Do not hold gauge valve closed for more than 5 seconds.
After removing gauge, bleed hydraulic system.
1970-71 Pump Pressure Specifications
| Car Model | Minimum Pressure | |
|---|---|---|
| American Motors | ||
| Roller Type Pump | 1000 lbs. | |
| Vane Type Pump | 665 lbs. | |
| Buick | 1000 lbs. | |
| Cadillac | 1350 lbs. | |
| Chevrolet Div. | ||
| Constant Ratio (Station Wagon) | 900 lbs. | |
| (Corvette) | 870 lbs. | |
| Variable Ratio (L6) | 1200 lbs. | |
| (V8) | 1350 lbs. | |
| Ford Motor Co. | 1175 lbs. | |
| Jeep | 1100 lbs. | |
| Oldsmobile | 900 lbs. | |
| Pontiac | 900 lbs. | |
1972 Pump Pressure Specifications
| Car Model | Minimum Pressure | |
|---|---|---|
| American Motors | 1100 psi | |
| Buick | 1000 psi | |
| Cadillac | 1350 psi | |
| Chevrolet Div. | ||
| Constant Ratio (Station Wagon) | 900 psi | |
| (Corvette) | 870 psi | |
| Variable Ratio (All) | 1350 psi | |
| Ford Motor Co. | 1175 psi | |
| Jeep | 665 psi | |
| Oldsmobile | 900 psi | |
| Pontiac | 900 psi | |
1973 Pump Pressure Specifications
| Pump Pressure Specifications | ||
|---|---|---|
| C***an Model | Minimum Pressure | |
| American Motors | 1000 psi | |
| Buick | 1000 psi | |
| Cadillac | 1350 psi | |
| Chevrolet Div. | ||
| Corvette | 870 psi | |
| Vega | 750-850 psi | |
| All Others | 1350 psi | |
| Ford Motor Co. | 1175 psi | |
| Jeep | 1000 psi | |
| Oldsmobile | 1350 psi | |
| Pontiac | 1300 psi | |