Fuel supply system - natural gas engines

Chapter overview

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety precautions when working on vehicles with a gas system
  1
• 1.2 Safety regulations for working on fuel supply
  3
• 1.3 Safety measures when working on vehicles with start/stop system
  4
• 1.5 Safety precautions when working on exhaust system
  5
• 2 Identification
  6
• 2.1 Engine number/engine data
  6
• 3 General information
  7
• 4 Repair notes
  8
• 4.1 Rules for cleanliness
  8
• 4.2 General information
  8
• 4.3 General repair instructions
  9
• 4.4 Foreign objects in engine
  10
• 4.5 Contact corrosion
  10
• 4.6 Routing and attachment of lines
  10
• 4.7 Fitting radiator and condensers
  10
• 4.8 Checking vacuum system
  10
• 5 Checking gas system
  12
• 5.1 Checking gas system for leaks
  12
• Fuel supply system
  19
• 1 Fuel system
  19
• 1.1 Overview of fitting locations - fuel system
  19
• 2 Fuel
  23
• 2.1 Assembly overview - fuel tank
  23
• 2.2 Assembly overview - protective covers
  30
• 2.3 Assembly overview - fuel tank shut-off valve
  32
• 2.4 Emptying fuel tank
  35
• 2.5 Removing and installing fuel tank
  50
• 2.6 Removing and installing fuel tank shut-off valve
  66
• 2.7 Releasing high pressure in fuel system
  78
• 2.8 Removing and installing filling connection
  79
• 2.9 Determining residual pressure in natural gas fuel tank
  82
• 3 Fuel delivery unit, fuel gauge sender
  104
• 3.1 Assembly overview - fuel delivery unit/fuel gauge sender
  104
• 3.2 Removing and installing fuel delivery unit, fuel gauge sender
  105
• 3.3 Removing and installing fuel gauge sender G
  107
• 4 Plug-in connectors
  108
• 4.1 Separating plug-in connectors
  108
• 5 Fuel filter
  113
• 5.1 Assembly overview - fuel filter
  113
• 5.2 Removing and installing fuel filter
  113
• 6 Activated charcoal filter system
  116
• 6.1 Assembly overview - activated charcoal filter system
  116
• 6.2 Checking fuel tank breather
  116
• 7 Accelerator pedal
  118
• 7.1 Assembly overview - accelerator module
  118
• 7.2 Removing and installing accelerator module with accelerator position sender G79 / G185
  118
• 8 Fuel pump
  121
• 8.1 Checking fuel system pressurisation pump G6
  121