0010 - Function of the injection system B. Fuel circuit (note deviations for off-road vehicles) Engines 601, 602.91, 603.91

73a

Choke orifice in fuel filter upper part 0.8 mm diameter

86

Fuel thermostat open, position up to +8 °C, fuel is preheated

86a

Fuel thermostat closed, as of +25 °C, fuel is no longer preheated

87

Supply line - cold fuel

87a

Return line - preheated fuel

148

Heater supply pipe with fuel heat exchanger

1

Injection pump

3

Fuel pump

15

Overflow valve with choke dia. 1.5 mm

30

Injection nozzles

43

Fuel prefilter

50

Leak-off fuel hose

54

Injection line cylinder 1

63

Fuel tank

73

Fuel filter upper part

79

Banjo fitting

80

Return line

81

Hose return

82

Supply fuel filter

83

Supply injection pump

84

Hose clamp

86

Fuel thermostat

87

Supply line fuel heat exchanger

87a

Return line fuel heat exchanger

88

Supply fuel thermostat

89

Suction line fuel pump

131

Fuel holder

148

Heater supply pipe with fuel heat exchanger

1

Injection pump

3

Fuel pump

15

Overflow valve with choke dia. 1.5 mm

27

Hollow screw

42

Fuel filter

43

Fuel prefilter

50

Leak-off fuel hose

51

Hose clamp

52

Screw plug

73

Fuel filter upper part

74

Hollow screw fuel filter

76

O-ring

77

Seal fuel filter

78

Sealing ring

A

Supply from fuel tank

B

Line to fuel pump

C

Feed to heat exchanger

D

Return from heat exchanger

E

Coolant inlet

F

Coolant outlet

1

Injection pump

3

Fuel pump

15

Overflow valve

27

Hollow screw

30

Injection nozzles

43

Fuel prefilter

50

Leak-off fuel hose

57

Injection line

52

Screw plug

63

Fuel tank

73a

Throttle drilling in top part of fuel filter

86

Fuel thermostat closed
Fuel is not preheated

89

Cut-off with central attachment

148

Fuel heat exchanger

64

Holder, cylinder 4, nozzle side

64a

Holder, cylinder 4, pump side

64b

Screw

66

Holder, lines

68

Plastic clip

68a

Plastic clip

69

Rubber backing

70

Plastic holder for 3 lines

71

Plastic holder for 2 lines

1

Injection pump

30

Injection nozzle complete

52

Screw plug

53

Nozzle plate

54

Injection line 1

55

Injection line 2

56

Injection line 3

57

Injection line 4

58

Injection line 5

59

Injection line 6