Pressure Test
- Note pressure reading with valve open and engine idling. Pressure should be less than 150 psi (11 kg/cm2 ). If pressure exceeds 150 psi (11 kg/cm2 ), check hoses for restrictions and poppet valve for proper assembly.
- Close the gate valve completely and reopen it 3 times. Record the highest reading each time. DO NOT close the valve for more than 5 seconds. Note if pressure is within specification. Refer to the PRESSURE TEST SPECIFICATIONS table.
- If readings are within specification and within 50 psi (3.5 kg/cm2 ) of each other, pump is operating properly.
- If pressures exceed specification, and are not within 50 psi (3.5 kg/cm2 ) of each other, flow control valve in pump is sticking. Remove flow control valve. Clean or replace flow control valve.
- If pressure is less than specification, clean or replace flow control valve in pump. If pressures are still low, replace pump.
- If pump is within specification, open valve and turn steering wheel from right to left stops. Record pressure. DO NOT hold wheel against stops more than 5 seconds.
- Compare both readings to the pump output pressure obtained previously. Pressure should be the same as the pump output pressure. If pressure is low, steering gear is leaking internally and must be repaired.
PRESSURE TEST SPECIFICATIONS
| Application | Idle: psi (kg/cm2 ) | Relief: psi (kg/cm2 ) |
|---|---|---|
| Wrangler | Less Than 150 (11) | 1000-1100 (70-77) |
| Grand Wagoneer | Less Than 150 (11) | 1350-1450 (95-102) |
| All Others | Less Than 150 (11) | 1000-1100 (70-77) |