Pump Relief Pressure Test
CAUTION:
DO NOT close shutoff valve for longer than 5 seconds or damage to pump may result.
With engine speed at 1500 RPM, close shutoff valve and observe pressure gauge. Flow rate should be zero. Open shutoff valve quickly after reading gauge and note flow rate return to normal. If pressure is not 1680-1800 psi (110-124 kg/cm2 ), repair or replace relief valve.