Pump Pressure Test
- Install pressure gauge. Start engine and let idle. Close valve (for no longer than 5 seconds). On Quantum, pressure is 986-1189 psi (69-84 kg/cm2 ). On all others, pressure is 1100-1200 psi (77.83-84.36 kg/cm2 ).
- If pressure is not to specification, check limiting valve by inspecting bores in valve and piston for obstructions. Ensure piston moves freely in housing. Install new valve if necessary.