Pump Pressure Test
- Install Pressure Gauge (US1074 B ) between pressure hose and pressure line of valve housing. Start engine and let idle. Close valve. Leave valve closed for no longer than 5 seconds. On Vanagon, pressure should be 1670-1750 psi (117-123 kg/cm2 ). On all others, pressure should be 1100-1200 psi (78-84 kg/cm2 ).
- On all vehicles except Vanagon, go to step 3). On Vanagon, if pressure is not to specification, inspect limiting valve and housing bores and piston for obstructions. Ensure piston moves freely in housing. Install new valve if necessary.
- If pump pressure is not within specification, replace pump.