MBE 4000

Fuel Injectors

Additional Information

SPECIFICATIONS

This section contains the specifications for servicing the engine.‪

Fuel Injectors

The fuel injection system torque values are listed in Table "Fuel Injection System Torque Values" . The torque values for the injector lines are listed in Table "Injector Lines Torque Values" .‪

Fastener Type‪

N·m (lb·ft)‪

Fuel Filter Cap Nut‪

25 (18)‪

Fuel Return Line Fittings (at fuel gallery inlet)‪

50 (37)‪

Hollow-Core Banjo Bolts‪

40-50 (30-37)‪

Pressure Limiting Valve (at fuel gallery outlet)‪

50 (37)‪

Protective Sleeve‪

45 (33)‪

Tensioning Arm Retaining Bolt‪

50 (37)‪

Unit Pump Mounting Bolts‪

65 (48)‪

Table 1. Fuel Injection System Torque Values

Fastener Type‪

N·m (lb·ft)‪

Using a 12-in. torque wrench‪

Using a 24-in. torque wrench‪

Required Torque on Fastener‪

Injector Line Nuts‪

27 (20)‪

25 (18)‪

30 (22)‪

Transfer Tube Thrust Bolt‪

40 (30)‪

36 (27)‪

45 (33)‪

Table 2. Injector Lines Torque Values

Engine Brake Harness

The former 8-pin Engine Harness Connector is identified with part number A460 150 00 33, and it is used in the engines that have one solenoid air valve for the engine brakes. Beginning with the engine serial number 739080, these current engines will have an 8-pin Engine Harness Connector with part number A460 150 01 33. The changes in the harness connections between the former and current 8-pin harness connector are Listed in Table "Former Harness Connector A460 150 00 33" and listed in Table "Current Harness Connector A460 150 01 33" .‪

Description‪

8-Pin Engine Harness Connector‪

DDEC-ECU 55-Pin Connector‪

Fan Control 1, switch to Bat- (PV3)‪

A‪

41‪

Fan Control 2, switch to Bat- (PV4)‪

B‪

43‪

Output Ground (PV)‪

C‪

11‪

Fan and Wastegate/E-Flap Voltage Supply (PV1, 3, 4)‪

D‪

12‪

Exhaust Flap/Wastegate Control, switch to Bat- (PV1)‪

E‪

51‪

Fan and Wastegate/E-Flap Voltage Supply (PV1, 3, 4)‪

F‪

12‪

Turbo Brake Control, switch to Bat- (PV6)‪

G‪

40‪

Turbo Brake Voltage Supply (PV6)‪

H‪

42‪

Table 3. Former Harness Connector A460 150 00 33

Description‪

8-Pin Engine Harness Connector‪

DDEC-ECU 55-Pin Connector‪

Fan Control #1, switch to Bat- (PV3)‪

A‪

41‪

Fan Control #2, switch to Bat- (PV4)‪

B‪

43‪

Compression Brake Control, switch to Bat- (PV2)‪

C‪

50‪

Fan and Wastegate/E-Flap Voltage Supply (PV1, 3, 4)‪

D‪

12‪

Exhaust Flap/Wastegate Control, switch to Bat- (PV1)‪

E‪

51‪

Compression Brake Voltage Supply (PV2)‪

F‪

52‪

Turbo Brake Control, switch to Bat- (PV6)‪

G‪

40‪

Turbo Brake Voltage Supply (PV6)‪

H‪

42‪

Table 4. Current Harness Connector A460 150 01 33

Fuel and Fuel Control

The fuel control torque values are listed in Table "Fuel Control Torque Values" . Listed in Table "Fuel System Torque Values" and listed in Table "Fuel System Torque Values" are the fuel system torque values. For a detailed wiring diagram of the 55-pin connector for the EPA98 (non-EGR)  engine, see Figure "55-Pin Connector Wiring Diagram for EPA98 Engine" and for a wiring diagram of the EPA04 EGR engine, see Figure "55-Pin Connector Wiring Diagram for EPA04 (EGR) Engine" .‪

Fastener Type‪

N·m (lb·ft)‪

Fuel Heat Exchanger Mounting Bolts‪

8 (6)‪

Fuel Lines‪

50 (37)‪

DDEC-ECU Control Unit Mounting Bolts‪

15 (11)‪

Table 5. Fuel Control Torque Values

Fastener‪

Torque Value, N·m (lb·ft)‪

Fuel Filter Cap‪

25 (18)‪

Fuel Line Banjo Bolts‪

50 (37)‪

Fuel Line Pipe Fittings‪

50 (37)‪

High-Pressure Fuel Lines‪

30 (22)‪

Fuel/Water Separator Mounting Nuts‪

50 (37)‪

Fuel Filter Housing Mounting Bolts‪

25 (18)‪

Fuel Pump Mounting Bolts‪

25 (18)‪

Table 6. Fuel System Torque Values

Fastener‪

Torque Value, N·m (lb·ft)‪

Fuel Spill Line Banjo Bolt‪

15 (11)‪

Fuel Pump Driven Gear Bolt‪

30 (22)‪

Fuel Temperature Sensor to Engine Block‪

30 (22)‪

Table 7. Fuel System Torque Values
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Figure 1. 55-Pin Connector Wiring Diagram for EPA98 Engine

Click to see this graphic in a separate window

Figure 2. 55-Pin Connector Wiring Diagram for EPA04 (EGR) Engine

Fuel System Inspection

The torque specifications for fuel line nuts are listed in Table "Torque Specifications for Fuel Line Nuts" . The fuel system specifications for pressure are listed in Table "Fuel System Specifications for Pressure" .‪

Component‪

Torque – N·m (lb·ft)‪

Transfer Tube Nut‪

45 (33)‪

High Pressure Line Nuts‪

30 (22)‪

Table 8. Torque Specifications for Fuel Line Nuts

Speed‪

Pressure – bar (psi)‪

Fuel Pressure Test at idle rpm‪

2.0 (29) – minimum‪

Fuel Pressure Test at rated rpm‪

5.5 – 6.5 (80 – 94)‪

Maximum difference between fuel filter housing inlet and outlet pressure‪

0.3 (4.0)‪

Table 9. Fuel System Specifications for Pressure


MBE 4000 Service Manual - 6SE412
Generated on 10-13-2008

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