The general specifications for the MBE 900 engine ...

1 MBE900 SERVICE MANUALThe general specifications for the MBE 900 engine arelisted in Table 1 .Description4-Cylinder Engines6-Cylinder EnginesEngine TypeVertical, in-line cylinder block with turbochargerand charge-air coolerCooling SystemLiquid CircuitCombustion Principle4-Stroke direct-injection dieselNumber of Cylinders46 Bore102 mm ( in)Stroke130 mm ( in)Displacement (total) liters (259 in ) liters (389 in )Compression :1 Starting SpeedApproximately 100rpmDirectionofEngineRotation(viewedfr om flywheel)CounterclockwiseStarterElectric MotorCoolant Capacity of engine (Does not includecapacity of cooling system.)Max. liters ( qt.)Max. liters ( qt.)Lubricating Oil (In standard pan,including oil filter.)

2 Max. liters ( qt.)Max. liters ( qt.)Cold-Start Temperature Limit (Without startingaids and with battery 75 percent charged)Down to 20C( 4F) engine "Dry" Weight395kg(871lb)530 kg (1169 lb)Intake = mm ( in)Valve Lash (with engine cool) exhaust = mm ( in)Intake = mm ( in)Valve Lift (at maximum valve clearance) exhaust = mm ( in)At idle rpm = 50 kPa (7 psi) engine Oil PressureAt maximum rpm = 250kPa (36 psi)Minimum opening pressure = 24 500 kPa (3553 psi)Fuel InjectorsMaximum opening pressure = 25 700 kPa (3727 psi)Opening temperature = 81to 85C(178to 185F)Coolant ThermostatNormal operating temperature = 95C(203F)Table 1 general Technical InformationAll information subject to change without notice.(Rev. 3/03)6SE414 0303 Copyright 2004 DETROIT DIESEL CORPORATIONFrom Bulletin 3-MBE900-049 MBE900 SERVICE MANUALGENERAL DESCRIPTION OF MBE 900 EGR SYSTEM AND engine VIEWSThe purpose of the exhaust Gas recirculation (EGR) System is to reduce engine exhaust gasemissions in accordance with EPA regulations.

3 See Figure 4a, 4c , 4d, 4e, and 4f for EGRcomponent Turbocharger5. Reed Valves (Models 904, 924 and 926)2. EGR Rotary Valve6. Water Return Line3. EGR Cooler7. Water Inlet EGR Cool Air MixerFigure 4aMBE 900 EGR System Components(Rev. 3/03)All information subject to change without Bulletin 3-MBE900-046SE414 0303 Copyright 2004 DETROIT DIESEL CORPORATIONMBE900 SERVICE MANUALThe EGR system consists of:TurbochargerEGR CoolerEGR Rotary ValveReed ValvesEGR MixerThe MBE 900 engines for on-highway EPA 2004 regulation applications use a water cooled EGRsystem. exhaust gases from the front three cylinders on six cylinder engines (all four cylinders onfour cylinderengines) are routed from the exhaust manifold through the EGR cooler, past controland reed valves (not on MBE 906), and mixed with the intake manifold charge air.

4 The additionof cooled exhaust gases back into the combustion airflow reduces the peak in cylinder oxides of nitrogen (NOx) are producedat lower combustion recycled exhaust gases are cooled before engine consumption in a twin tube-and-shell enginewater cooler. See Figure 4b .Figure 4bAir Flow Diagram Through engine with EGR SystemAll information subject to change without notice.(Rev. 3/03)6SE414 0303 Copyright 2004 DETROIT DIESEL CORPORATION From Bulletin 3-MBE900-04 10aThe MBE 904, MBE 924 and MBE 926 engines have reed valves to assist in the transport ofexhaust gasses. In order to drive exhaust gas transport to the engine , the pressure in the exhaustmanifold mustgreater than the charge air pressure.

5 The pressure of gasses in the exhaust manifoldchanges over time, peaking when the exhaust valves open. exhaust gasses pass through thereed valves during these pressure peaks. The reed valves permit transport of exhaust gassesonly during the time when the exhaust gasses pressure is greater than the charge air Figure 4c for the location of the reed valves. See Figure 4d for a top view of the MBE906 EGR engine , indicating major EGR Charge Air Tube Manifold3. Reed Valves (Models 904, 924 and 926)2. EGR Delivery Pipe4. EGR/CA Mixer Tube (Model 906)Figure 4cReed Valve Location (MBE 904, MBE 924 and 926 engines only)(Rev. 3/03)All information subject to change without From Bulletin 3-MBE900-04 6SE414 0303 Copyright 2004 DETROIT DIESEL CORPORATIONMBE900 SERVICE MANUAL1.

6 Charge Air Tube8. EGR Cooler Flange Heat Shield2. Grid Heater9. Coolant Return Tube3. Reed Valve (904, 924 and 926 models only)10. EGR/CA Mixer4. Fuel Filter Pre and Main11. Turbocharger5. Thermostat Cover and Housing 12. EGR Cooler (upper and lo wer)6. Coolant Inlet Tube13. Charge Air Housing7. EGR Delivery Pipe14. EGR Rotary ValveFigure 4dTop View of EGR ComponentsAll information subject to change without notice.(Rev. 3/03)6SE414 0303 Copyright 2004 DETROIT DIESEL CORPORATION From Bulletin 3-MBE900-04 10c1. Starter Motor6. EGR Cooler2. Flywheel Housing 7.

7 Turbocharger Compressor Out3. exhaust Manifold8. Breather Tube4. Cylinder Head Cover9. Turbocharger Heat Shield5. Air Intake Manifold10. Oil PanFigure 4e Right Rear View of MBE 900 2004 EGR engine and Components(Rev. 3/03)All information subject to change without From Bulletin 3-MBE900-04 6SE414 0303 Copyright 2004 DETROIT DIESEL CORPORATIONMBE900 SERVICE MANUAL1. Air Compressor6. Oil Centrifuge2. DDEC-EC U 7. Air Intake Manifold3. Pre Filter 8. Cylinder Head Cover4. Main Fuel Filter9. Flywheel Housing5.

8 OilFillCap 10. Oil PanFigure 4f Left Rear View of MBE 900 2004 EGR engine and ComponentsAll information subject to change without notice.(Rev. 3/03)6SE414 0303 Copyright 2004 DETROIT DIESEL CORPORATION From Bulletin 3-MBE900-04 10eThe general specifications for the MBE 900 EGR engines arelisted in Table 1aDescription4-Cylinder EGR Engines6-Cylinder EGR EnginesEngine TypeVertical, in-line cylinder block with turbochargerand charge-air coolerCooling SystemLiquid CircuitCombustion Principle4-Stroke direct-injection dieselNumber of Cylinders46 Bore102 mm ( in)106 mm ( in)106 mm( )136 mm ( )Stroke130 mm( in.)

9 136 mm ( in.)106 mm( )136 mm ( )Displacement (total) liters(259 in ) liters (292 in ) liters(389 in ) liters (439in )Compression Ratio18:118 :1 Starting SpeedApproximately 100 rpmDirection of engine Rotation (viewed from flywheel)CounterclockwiseStarterElectric MotorCoolant Capacity of engine (Does not include capacityof cooling system.)Max. liters ( qt.)Max. liters ( qt.)Lubricating Oil (In standardpan, including oil filter.)Max. liters ( qt.)Max. liters ( qt.)Cold-Start Temperature Limit (Without starting aidsand with battery75 percent charged)Down to 20C( 4F) engine "Dry" Weight395kg(871lb)530 kg (1169 lb)Intake = mm ( in)Valve Lash (with engine cool) exhaust = mm ( in)Intake = mm ( in)Valve Lift (at maximum valve clearance) exhaust = mm ( in)At idle rpm = 50 kPa(7 psi) engine Oil PressureAt maximum rpm = 250 kPa (36 psi)Minimum opening pressure = 24 500 kPa (3553 psi)Fuel InjectorsMaximum opening pressure = 25 700 kPa (3727 psi)Opening temperature = 81to 85C(178to 185F)Coolant ThermostatNormal operating temperature = 95C (203F)Table 1a general Technical Information for MBE 900 EGR Engines(Rev.)

10 3/03)All information subject to change without From Bulletin 3-MBE900-04 6SE414 0303 Copyright 2004 DETROIT DIESEL CORPORATIONMBE900 SERVICE MANUALIDENTIFICATIONE ngine Identification NumberThe engine identification number is lasered in large font onto an enlarged labeling surface onthe rear right block. See Figure 5. The etched identification number contains the type referencefollowed by a sequential manufacturing number. See Figure 5 Location of engine Identification NumbersAll information subject to change without notice.(Rev. 3/03)6SE414 0303 Copyright 2004 DETROIT DIESEL CORPORATION From Bulletin 3-MBE900-04 10gThis pageintentionally left blank.