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Pump Pressure Test
- Install pressure gauge. Start engine and let idle. Close valve (for no longer than 5 seconds). On Quantum models, pressure is 986-1189 psi (69-84 kg/cm2
). On all other models, 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.