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## 20 Cooling System - OM606

> Maintenance Jobs

- 2010 - Checking coolant level/antifreeze protection
- 2080 - Replacing coolant

  Service

- 20.1 - Installation Instructions, Coolant Pre-heater, Model 124

> Additional Information

- Cooling System Diagnostic
- Oil in cooling system? After repair, use Alkaline cleaner, Disodium trioxosilicate, pentahydrate.
  - Part number is 001 986 21 71 (500 grams)
- Scale in cooling system? Use Citric Acid at 100 grams per liter.
  - Part number is 000 989 10 25 (500 grams)

> Cooling system

- 20-1000A - Coolant circuit function
- 20-1010HA - Checking cooling system for leaks
- 20-1142HW - Draining, filling system with engine coolant
- 20-1250A - Removing oil in cooling and heating system

> Cooling pump

- 20-1270HA - Removing and installing coolant pump housing
- 20-1271HA - Removing and installing coolant pump

> Cooling thermostat

- 20-2460HA - Removing and installing coolant thermostat

> Radiator

- 20-3865HA - Removing and installing radiator
- 20-3865HB - Removing and installing radiator
- 20-4300HA - Testing cooling system cap
- 20-4540A - Removing, installing overflow reservoir

> Fan couplings

- 20-5660HA - Removing, installing viscous fan coupling
- 20-5660HB - Removing, installing viscous fan coupling
- 20-6800HA - Removing, installing fan shroud

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