Bedienungsanleitung Vanguard Single Cylinder (Seite 54 von 281) (Englisch)

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1. Oil level must be between the ADD and

FULL mark on dipstick.

2. Remove pressure switch or 1/8 in. NPTF

plug in oil filter adapter.

3. Install oil pressure gauge ([A] Fig. 50).

4. Start engine. Run for approximately 5

minutes.

5. Check oil pressure at 3000 RPM. Oil

Pressure should be 10~50 psi (0.7~3.5

Bar).

If Oil Pressure is Low, check for:

• Engine RPM Too Low

• Wrong Viscosity or Diluted Oil

• Low Oil Level

• Broken Pressure Relief Spring

• Missing Pressure Relief Plunger

• Worn Bearings

• Damaged or Worn Oil Pump

If Oil Pressure is High, check for:

• Wrong Viscosity Oil

• Plugged Oil Galleries

• Stuck Pressure Relief Plunger

OIL GARD® LOW-OIL

PROTECTION SYSTEMS

VANGUARD™ series engines are equipped with

Oil Gard® low oil protection systems designed to

prevent engine damage from running with

insufficient oil. This oil float system is mounted

inside the engine cylinder. Oil Gard® will shut

down a running engine and prevent it from

restarting if the oil level becomes too low.

When the oil drops below the minimum level, a

float pin contacts the sensor mounting bracket in

the cylinder. This completes a circuit from the

ignition coil, through the module, to the float

sensor and then to ground. This grounds the

ignition coil and prevents the spark plug from

firing. When a restart is attempted, a light in the

ON/OFF switch flashes to indicate LOW OIL.

The Oil Gard® protection system consists of:

• An oil float sensor located inside the

cylinder.

• An electronic module.

• An ON/OFF rocker switch.

• Connecting wires.

The system may have a module with four wires

(BLUE, BLACK, WHITE and RED) or two wires

(BLACK, BLACK).

Preliminary Low Oil Checks:

• Ensure the engine oil level is to the FULL

mark.

• Ensure the fuel delivery system is

functioning properly.

• Ensure that the engine is not being

operated at an excessive angle.

• Ensure that the wiring is not obviously

pinched or otherwise damaged.

Troubleshooting Oil Gard® 2-Wire Systems

Symptom: Engine starts, dies and will not

keep runn ing

Disconnect the BLUE or BLACK wire at ([A] Fig.

51) and start engine.

If the engine starts and dies:

• Replace the module ([E] Fig. 51) and

retest.

If the engine starts and continues to run:

• Reconnect the wire at .

If the engine dies:

• Check continuity in the wire between ([A

and B] Fig. 51).

If there is no continuity:

• Replace the wire.

If the wire has continuity:

• Replace the float sensor in the cylinder

Symptom: Engine will not start

• Disconnect wires at ([C and D] Fig. 51)

and attempt an engine start.

If the engine does not start:

• Check the ignition armature (G) for

grounds.

If the engine starts and runs:

• Reconnect the wire at (C).

If the engine does not stop:

• Reconnect the wire at (D).

If the engine dies:

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Vanguard Single Cylinder Seite 54

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