Pump Pressure Test
- With pressure gauge installed, start engine and run at idle. Close valve (for no longer than 5 seconds). On Quantum models, pressure should be 986-1189 psi (69-84 kg/cm2 ). On all other models, 1100-1200 psi (77.83-84.36 kg/cm2 ).
- If pressure differs, check limiting valve by inspecting bores in valve and piston for obstructions. Check that piston moves freely in housing. Install new valve, if necessary.