SERVO VALVE GROUP 3G3844 - Caterpillar

Before Starting the Engine
Perform required periodic maintenance before starting the engine. make a walk-around inspection of the installation. It only takes a few minutes to make minor corrections. This can prevent major repairs at a later date.
All valves in fuel return line must be open before and during engine operation to prevent high fuel pressure. High fuel pressure may cause filter housing failure or other damage.
1. Inspect the coolant level. The level should be to the bottom of the tank filler neck. On some systems, maintain the coolant according to the proper level indicated by a sight glass.After starting the engine, operate at slow speed until the engine is at operating temperature. Check and add coolant if necessary.
Oil level gauge (dipstick) location. 2. Measure the crankcase oil level. The correct oil level is shown by the marks just below the words FULL and ADD on the dipstick. Two dots are currently used to indicate the correct level. Some earlier dipsticks have a line across the dipstick in the same location. Keep the oil level between these marks. Never use the words printed on the dipstick to measure the oil level.Refer to the Refill Capacities Chart in this manual for the proper amount of oil for your engine. Remove mounted or auxiliary filters require additional oil. If auxiliary oil filters (non-Caterpillar furnished) are used with the engine, refer to the manufacturer's instructions.3. Disconnect any battery chargers that are not protected against the high current drain created when the electric starter engages. 4. All guards must be in place. Repair or replace all guards that are damaged or missing. 5. Make sure air inlet shutoff knob is in the RUN position and inlet piping and filters are in place.6. Make sure fuel lines are properly clamped and tight. Check for loose fittings or leaks.7. Check for any obvious cooling system leaks or loose connections. Inspect the water pump(s) for evidence of leaks.8. Check for lubrication leaks, such as the front and rear crankshaft seals, crankcase, oil filter, oil gallery plugs and sensors, and valve covers.9. Check electrical cables and the battery for poor connections and corrosion.Starting the Engine
Do not engage starter when flywheel is turning.If oil pressure does not raise within 15 seconds after the engine starts, stop the engine and make necessary corrections.Do not start engine under load (marine gear in Ahead or Astern).
Air Starting
1. Place the marine gear in NEUTRAL.2. Move the throttle to LOW IDLE engine speed.3. Open and close the drain valve on the bottom of the air tank to drain condensation and oil overflow.4. Check the air supply pressure. The air starter must have 690 kPa (100 psi) to operate properly. 5. Check the oil level in the air lubricator. Keep jar at least half full. Add oil if necessary. Refer to the Lubricant Viscosity Recommendations for the proper oil to use. 6. If equipped with a toggle switch and an air control valve, move the toggle switch (1) to the ON position and push