383.0   Preservation instructions Unimog

Select Sheet 
Overview  

With this information we would like to inform you about the procedure involved in immobilizing or recommissioning a vehicle.

Vehicle immobilization means that the vehicle is out of service for more than 2 months.

The following list of measures serves to keep the vehicle in an excellent condition.

If the measures specified here are not observed, material damage and personal injury may occur as a result of malfunctions in the brake and clutch system.

The work to be performed is available in the maintenance documents (AP information type).

Measures during the temporary storage of vehicles

  1. Thoroughly clean vehicle, engine and transmission.

  2. Empty fuel tank and fill with enough diesel fuel to enable the engine to be turned on for 10 min once a month over the entire temporary storage period.

    Only for vehicles that were operated with biodiesel or vegetable oil.

  3. Start engine and let run for 15 to 30 minutes with an engine speed of roughly 900 rpm.

    In vehicles that were operated with biodiesel or vegetable oil, the fuel system or the fuel injection system is rinsed with diesel fuel in the process. In vehicles with code (F43) Auxiliary heater with engine preheating the auxiliary heater has to be switched on when flushing it.

  4. Remove rust spots and paint damage at vehicle.

  5. Remove rust spots from engine.

  6. Whenever possible, park vehicle in a sheltered area.

  7. Secure vehicle using chocks.

    In the event of an immobilization lasting longer than 3 months, jack up the vehicle on jack stands.

  8. Manually release combination brake cylinder or spring brake cylinder to prevent the brake pads from rusting.

  9. Cover all vehicle windows so that the plastic parts and seat covers do not fade.

  10. Drain compressed air system at compressed air reservoirs.

  11. Remove compressed air desiccant cartridge.

  12. Check the area below the compressed air desiccant cartridge for dirt, and clean if necessary.

  13. Install compressed air desiccant cartridge again.

  14. Apply prescribed lubricant to all lubrication points.

    See maintenance sheet.

  15. Increase tire pressure to avoid any flat spots on the tires, or jack up vehicle to relieve the load on the tires.

    The maximum pressure as specified by the tire manufacturer must not be exceeded.

  16. Cover tires to protect against solar radiation.

  17. Change engine oil and oil filter.

    If the engine oil has been in the engine for more than 800 operating hours or 20,000 km or is older than 12 months.

  18. Disconnect the ground line at the battery to prevent discharging by no-load current consumers.

  19. Fully charge batteries individually.

    The fluid level in the batteries is to be checked and supplemented, if necessary, before and after charging.

  20. Check antifreeze portion in coolant as well as coolant level and correct, if necessary, or change coolant.

  21. Check antifreeze portion and washer fluid level in the windshield washer system and correct if necessary.

  22. Completely fill AdBlue® tank so that the AdBlue® cannot crystallize out.

    Only in vehicles with code (MS4) BlueTEC 4 or code (MS5) BlueTEC 5.

  23. Drain water from water separator of fuel system.

    Only in vehicles with code (M55) Fuel preheating with water separator or with code (M61) Fuel prefilter with water separator.

  24. In vehicles with code (G48) Electronic Automated Gearshift (EAS) always fold out the clutch pedal.

Measures during temporary storage

  • The engine must be allowed to run every month for approx. 10 minutes with max. 900 rpm with the air conditioning switched on and the auxiliary heater switched on (depending on the vehicle equipment).
    The engine oil level and the coolant level absolutely must be checked before starting. In vehicles with code (M55) Fuel preheating with water separator or with code (M61) Fuel prefilter with water separator, drain the water separator if necessary.
    The oil pressure as well as the coolant and oil temperature must be kept in mind when starting the engine or while it is running. During this time, all gears that can be engaged at a standstill should be shifted through.
    Before shifting the gears, operate the clutch pedal approx. 6 to 8 times to release any air pocket that may be present in the clutch hydraulics again. In vehicles with code (G48) Electronic Automated Gearshift (EAS) the clutch pedal has to be folded out first.
    The compressed air drier must also be regenerated. Lower the pressure in the compressed air system below the cut-in pressure for this, for example by repeatedly actuating the service brake, and then allow the engine to run until the shutoff pressure is reached.
  • The batteries are to be recharged individually every 3 months. The fluid level in the batteries is to be checked and supplemented, if necessary, before and after recharging.
  • Turn through the axles every 3 months to lubricate the components that are not constantly covered with oil.
  • Crank steering from the left to the right several times every 3 months with the engine running.
  • The engine oil and oil filter must be changed every 24 months.

Measures during the recommissioning of vehicles

  1. Check hoses and lines for cracks.

  2. Empty fuel tank and fill with new fuel.

  3. Replace filter insert of water separator of fuel system.

    Only in vehicles with code (M55) Fuel preheating with water separator.

  4. Replace fuel filter insert.

  5. Install new air filter element.

  6. Change engine oil and oil filter.

  7. Check coolant level.

    If coolant must be refilled, check antifreeze portion in coolant and correct if necessary.

  8. Check washer fluid level in windshield washer system.

    If washer fluid must be refilled, check antifreeze portion in washer fluid and correct if necessary.

  9. Mechanically clamp combination brake cylinder or spring brake cylinder.

    In vehicles with code (B28) Mechanical quick release mechanism for spring brake cylinder, check function of quick release mechanism.

  10. Correct tire inflation pressure.

  11. Lower vehicle and secure with chocks.

    Only if the vehicle was jacked up.

  12. Check charge level of batteries, recharge batteries individually if necessary.

    The fluid level in the batteries is to be checked and supplemented, if necessary, before and after recharging.

  13. Connect ground line to battery.

  14. Decode radio.

  15. Check time on instrument cluster, set if required.

  16. Set the time at timer of the auxiliary heater.

    Only in vehicles with code (F43) Auxiliary heater with engine preheating. Refer to the operator's manual for the procedure.

  17. Synchronize time between tachograph disk and display

    See owner's manual.

  18. Check operation of electrical system.

  19. Rinse fuel system or fuel injection system.

    To do so, start engine and let run for 15 to 30 minutes with an engine speed of roughly 900 rpm. In the process, monitor the oil pressure as well as the coolant and oil temperature. In vehicles with code (F43) Auxiliary heater with engine preheating the auxiliary heater has to be switched on when flushing it.

  20. Before shifting the gears, operate the clutch pedal approx. 6 to 8 times to release any air pocket that may be present in the clutch hydraulics again. In vehicles with code (G48) Electronic Automated Gearshift (EAS) the clutch pedal has to be folded out first.

  21. Replace brake fluid in clutch operating system.

    The brake fluid in the clutch operating system must be replaced every 3 years.

  22. Replace brake system brake fluid.

    In vehicles with hydraulic disk brake.

  23. Replace compressed air desiccant cartridge.

    Only if the maintenance interval has been reached or the compressed air desiccant cartridge is older than 24 months.

  24. Check oil level in steering system, engine, transmission, drive axles and hydraulic system.

  25. Thoroughly clean vehicle, engine and transmission.

  26. Check function of steering and brake system during a test drive.

    Repeated braking will also remedy any corrosion residues on the brake disks, among other things.

  27. Check compressed air system noise damper.

  28. Conform all conducted maintenance operations in the maintenance booklet.