841954 Volvo.Penta Bulb socket

ENGINE INSTALLATION ARRANGEMENT FOR 637D and 639D SCRAPERS
1. Turbocharger. 2. Exhaust manifold. 3. Fuel ratio control. 4. Governor control lever. 5. Cover for fuel setting adjustment. 6. Connection for fuel return line. 7. Connection for fuel supply line. 8. Fuel pressure switch and connection for fuel pressure indicator. 9. Fuel priming pump. 10. Magnetic switch. 11. Starting motor. 12. Service meter. 13. Connection for air activated governor control. 14. Oil supply to timing advance. 15. V-belt tightener. 16. Water inlet to radiator. 17. Vent line. 18. Aftercooler housing. 19. Air filter. 20. Water outlet from aftercooler. 21. Water inlet to aftercooler. 22. Water temperature switch. 23. Water temperature sending unit. 24. Cylinder head. 25. Identification plate on cylinder block. 26. Water pump. 27. Oil filler. 28. Oil filter. 29. Oil cooler. 30. Coolant flow switch. 31. Oil pressure switch and sending unit. For Specifications with illustrations, make reference to SPECIFICATIONS FOR 3306 VEHICULAR ENGINE FOR 637D AND 639D SCRAPERS, Form No. SENR7354. If the Specifications in Form SENR7354 are not the same as in the Systems Operation and the Testing and Adjusting, look at the printing date on the back cover of each book. Use the Specifications given in the book with the latest date.The 3306 Vehicular Engine for the 637D and 639D Scrapers is part of a series of 4.75 in. (120.7 mm) bore, 6.00 in. (152.4 mm) stroke in-line engines. This book has the information for this six cylinder engine which is turbocharged and has a watercooled aftercooler.This engine has 638 cu. in. (10.5 liter) displacement. The firing order is 1, 5, 3, 6, 2, 4. The engine has a Sleeve Metering Fuel System. The engine which is used with the 637D and 639D Scrapers has an air activated governor control and an electric shut-off solenoid for control by the operator from the tractor.Fuel System
Introduction
The Sleeve Metering Fuel System is a pressure type fuel system. The name for the system is from the method used to control the amount of fuel in the fuel injection charge. This system has an injection pump and an injection valve for each cylinder. The injection pumps are in the fuel injection pump housing on the right side of the engine. The injection valves are in the precombustion chambers in the cylinder head.Fuel System Timing
An automatic timing advance unit connects the drive sleeve on the end of the camshaft to the timing gears in the front of the engine. The unit changes the timing of the fuel system according to the engine speed to give better combustion of the fuel at all levels of engine operation. The unit in this engine changes injection timing from 8° 30' BTC, at 1200 rpm, to 14° 30' BTC, at 2200 rpm.Water Separator
Some engines have a water separator. The water separator is installed between the fuel tank and the rest of the fuel system. For efficiency in the action of the water separator the fuel flow must come directly from the fuel tank and through the water separator. This is because the action of going through a pump or valves before the water separator lowers the efficiency of the water separator.The water separator can remove 95% of the water in a fuel flow of up to 33 gph (125 1/hr) if the concentration of the water in the fuel is 10% or less. It is important to check the water level in the water separator frequently. The maximum amount of water which the water separator can hold is 0.8 pt. (0.4 1). At this point the water fills the glass to 3/4 full. Do not let the water separator have this much water before draining the water. After the water level is at 3/4 full, the water separator loses its efficiency and the water in the fuel can go through the separator and cause damage to the fuel injection pump.Drain the water from the water separator every day or when the water level gets to 1/2 full. This gives the system protection from water in the fuel. If the fuel has a high concentration of water, or if the flow rate of fuel through the water separator is high, the water separator fills with water faster and must be drained more often.To drain the water separator, open the valve in the drain line and the valve at the top of the water separator. Let the water drain until it is all out of the water separator. Close both valves.Fuel Flow With Engine Running
SCHEMATIC OF FUEL SYSTEM
1. Constant bleed valve. 2. Disc. 3. Siphon break orifice. 4. Priming pump. 5. Fuel injection pump. 6. Fuel injection valve. 7. Bleed valve. 8. Fuel return line. 9. Fuel supply line. 10. Fuel tank. 11. Fuel filter. 12. Channel. 13. Check valve. 14. Check valve. 15. Housing for the fuel injection pumps. 16. Check valve. 17. Bypass valve. 18. Transfer pump.
FUEL SYSTEM INSTALLED (Typical Illustration)
1. Constant bleed valve. 4. Priming pump. 5. Fuel injection pump. 7. Bleed valve. 19. Shutoff solenoid. A. Connection for fuel supply line (9). B. Service meter.
SLEEVE METERING FUEL INJECTION PUMP
4. Priming pump. 5. Fuel injection pump. 7. Bleed valve. 19. Shutoff solenoid. 20. Position for oil pressure shutoff (attachment). 21. Fuel ratio control. 22. Brass screw terminal. 23. Position for measurement of fuel pressure in housing. 24. Filter base. 25. Timing pin in storage position. 26. Drive sleeve. 27. Governor control shaft. 28. Cover for high idle stop and low idle stop. 29. Position for using timing pin. 30. Cover for housing. 31. 2P8315 Bracket Assembly. 32. Transfer pump drain. 33. Inlet for lubricating oil for automatic timing advance unit.When the engine is running, transfer pump (18) pulls fuel from fuel tank (10), through fuel filter (11), and into channel (12) behind cover (30). From the channel, the fuel goes through check valve (13) into the bottom of priming pump (4), through the priming pump, out check valve (14) and into passage (34) in the housing. The fuel in the passage is the supply