Primary Circuit Pressure

Turn three-way valve lever to closed position (lever points to fuel distributor connection). Turn ignition on. Pressure should raise to 4.5-5.2 bar. Now check seals of control pressure circuit as follows: With control pressure at 3.7 ±.2 bar and throttle half open, close off control pressure circuit (turn lever at three-way valve in direction of control pressure regulators). With ignition switch on, control pressure must not drop below 0.7 bar in 10 minutes. Pressure tests are now completed. Disconnect tool and reconnect all system connections. Switch on ignition and visually check connections for leaks.