Pressure Relief Valve
- Shut engine off and relieve pressure from system by opening bleed screw. Remove bleed screw and connect tester to leveling valve.
- Start engine and move leveling valve lever up to filling position. When relief valve opening pressure is reached, noted by a hissing or knocking noise, read pressure on gauge. Pressure should be 1740-2320 psi (122-163 kg/cm2 ). After test, return lever to neutral position.