| Check | ||
Warning | Risk of injury caused by body parts being pinched or crushed as cab is tilted | Ensure that no one is within the tilting range of the cab as it is being tilted. Always tilt the cab all the way to the end position and secure it with the safety strut. | |
Danger | Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel. | No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. | |
Warning | Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | |
Warning | Risk of injury caused by pinching and crushing when opening and closing engine hood | No one should be within the swivel range of the engine hood as it is being opened or closed. Always open engine hood all the way to the end position until this engages in the front locks. | |
1 | Tilt the cab | Type 958.4, 934, 963 | |
Topical note | Notes on tilting the cab | ||
2 | Tilt the hood | Type 695.023/053 | |
3 | Remove the left acoustic encapsulation | ||
4 | Perform a visual inspection on all the fuel pipes, joints, threaded joints and other components | In case of dirty components, clean and dry them. Let the engine run for approximately 2 to 3 minutes at adjustment speed. | |
In case of damage or leakages: replace the corresponding component, seal the joint and tighten the threaded joint to the prescribed tightening torque. | |||
5 | Open the fuel tank cap | ||
6 | Check the fuel filtering element and, if necessary, replace it | ||
| Type 695.023/053 | ||
| Type 958.4, 963 | ||
Collect properly the drained fuel. | |||
7 | Start the engine and let it run until it reaches operating temperature, then turn off the engine | Fuel temperature in the fuel reservoir must be 40 °C. | |
8 | Check for low pressure fuel circuit tightness | ||
Notes on possible sources of fault in the low-pressure fuel circuit | Motor 457.9 | ||
Fuel line hollow screw in the electromagnetic valve in the flame system and in the filter housing | |||
.Fuel line hollow screw in the heat exchanger | |||
.Fuel line hollow screw in the fuel housing | |||
.Pressure drop in the low pressure fuel circuit | |||
Adaptation parts | |||
Tester | |||
High-pressure hose | |||
9 | Measure fuel pressure downstream of fuel filter |
| |
Perform the test only on vehicles with poor engine performance. | |||
If the fuel pressure is within the tolerance range, further testing on the low pressure fuel circuit is not required. | |||
.Fuel pressure after the fuel filter | |||
.Fuel line hollow screw in the fuel housing | |||
.Fuel line hollow screw in the electromagnetic valve in the flame system and in the filter housing | |||
.Fuel return volume in the fuel tank | |||
.Fuel suction pressure before the fuel pump | |||
.Fuel line hollow screw in the heat exchanger | |||
High-pressure hose | |||
Tester | |||
Adaptation parts | |||
Tester | |||
Clamp | |||
Adaptation parts | |||
If the fuel pressure is high after the fuel pressure measurement: | |||
| |||
Measure the fuel return volume in the fuel tank. | |||
Measure fuel return quantity at the fuel tank | |||
If the fuel pressure is low after the fuel pressure measurement: | |||
| |||
Measure the fuel inlet pressure upstream of fuel pump. | |||
Measure fuel intake pressure upstream of fuel pump | |||
10 | Close the fuel tank cap | ||
11 | Actuate the engine start-up and bleed the fuel system | The fuel system bleeds automatically. Run engine for approximately 1 minute. | |
If engine does not start or run for a short period only: | |||
| |||
Bleed fuel system | |||
12 | Stop the engine | ||
13 | Install the left acoustic cover | ||
14 | Return the cabin to its position |
123 589 04 21 18
High-pressure hose
541 589 00 91 00
Adaptation parts
617 589 04 21 00
Tester
000 589 40 37 00
Clamp
541 589 02 21 00
Tester
Referenced documents
- ah0715n100002c Notes on possible sources of fault in the low-pressure fuel circuit
- ah0715n100002c
- ah6080n000301a Notes on tilting the cab
- ap4720b0780d Replace fuel filter
- ap4720b0780tga Replace fuel filter
- ar0715b200002tc Measure fuel pressure downstream of fuel filter
- ar0715b200003tc Measure fuel return quantity at the fuel tank
- ar0715b200005tc Measure fuel intake pressure upstream of fuel pump
- ar4700b1720tc Bleed fuel system
- as0000z000501a Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.
- as4700z000101a Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel.
- as6080z000101a Risk of injury caused by body parts being pinched or crushed as cab is tilted
- as8840z000101a Risk of injury caused by pinching and crushing when opening and closing engine hood