Features:

• Allow engine to reach normal operating temperature.
• Stop engine, remove all glow plugs or injectors ( refer to vehicle manufacturers manual).
• The compression tester ( with correct fitting attached ) can now be screwed into a glow plug/ injector hole. Ensure that fitting is screwed in securely.
• Disconnect the fuel shut off solenoid to disable the fuel injection pump.
• With the throttle in the wide open position, turn the engine over 6-8 revolutions. The dial gauge (5) will automatically read  the highest pressure reached.
• To release the pressure, and reset the gauge, depress the bleed valve button(17).
• The compression tester can now be unscrewed, and the next cylinder tested
  3"  Gauge with Protective Sleeve. Reading 0-1000PSI .