PUMP GP-PISTON 3337827 - Caterpillar

Unburned gas in the air inlet and exhaust system may ignite when the engine is started. Personal injury and/or property damage may result.Before starting an engine that may contain unburned gas, purge the unburned gas from the air inlet and exhaust system. Refer to the topic on purging unburned gas in the "Starting the Engine" section.
If an engine protective device shuts off the engine, always determine the cause of the shutoff. Make the necessary repairs before attempting to start the engine.Become familiar with the following information:
Types of the alarm and shutoff controls
Locations of the alarm and shutoff controls
Conditions which cause each control to function
Resetting procedure that is required before starting the engineOn G3400 Engines, protective devices are available for the following faults:
Low oil pressure
High coolant temperature
Overspeed
Low coolant levelFurther protection is supplied by an emergency stop button.Three basic protection systems are available:
Self-powered shutoff
Automatic start/stop system
Customer supplied shutoffNote: For an energize-to-shutoff system, the gas shutoff valve must be energized to shut off gas to the engine. For an energize-to-run system, the gas shutoff valve must be energized in order to supply gas to the engine. The self-powered system can be used with an air starting motor or an electric starting motor. An energize-to-shutoff gas valve and an instrument panel are required for this system.Power for the automatic start/stop system is supplied by an external 24 volt electrical source. The automatic start/stop system can be used with an air starting motor or an electric starting motor. An energize-to-run gas valve and one of these controls are required:
Automatic start/stop switchgear
Engine control logicFor the customer supplied shutoff system, the customer must supply all of the wiring and the shutoffs. This includes the emergency stop button and wiring.The features of the shutoff systems are listed in Table 1.
Table 1
G3400 Engine Protection Systems
Item Type of System Shut Down Setting Limits
Self-Powered Automatic Start/Stop Customer Supplied (1)
High jacket water coolant temperature Yes Yes Yes 105 °C (221 °F)
Low oil pressure (high rpm) Yes Yes Yes 275 kPa (40 psi)
Low oil pressure (low rpm) 100 kPa (15 psi)
Overspeed (1800 rpm) No (2) Yes Yes 2160 RPM
Overspeed (1400 rpm) 1680 RPM
High inlet manifold air temperature
32 °C (90 °F) No No Yes (3) 43 °C (110 °F)
High inlet manifold air temperature
54 °C (130 °F) 66 °C (150 °F)
Emergency stop Yes Yes Yes N/A
(1) The customer is responsible for supplying the shutoffs and the wiring.
(2) Overspeed protection is available as an option.
(3) The customer is responsible for supplying the protection for either high inlet manifold temperature or high aftercooler water temperature.