Check main circuit coolant level

AP20.30-P-2050T

Check main circuit coolant level

14.02.2020

Engine

139 in model 118, 177, 247

Shown on engine 139 in model 177.053

1

Cap

2

Coolant expansion reservoir

Shown on engine 139 in model 118.354

1

Cap

2

Coolant expansion reservoir

Shown on engine 139 in model 118.354

1

Cap

2

Coolant expansion reservoir

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

Topical note

Notes on coolant

AH20.00-N-2080-01A



Check

1

Check coolant level in upper area of coolant expansion reservoir (2).

 The coolant level at a coolant temperature >  20 °C must reach exactly up to the marking (arrow A).

If the coolant level matches the conditions,



coolant level correct, check complete, no further operations steps necessary.

If the coolant level does not match the conditions,



correct coolant level in coolant expansion reservoir (2), continue with operation step 2.



Remove

2

Unscrew the cap (1) of the coolant expansion reservoir (2).


Open cap (1) only at a coolant temperature of < 40 °C.
Coolant can otherwise escape.



Check

3

Correct coolant level.

 At coolant temperature and engine compartment temperature of 20 °C, the coolant level must reach up to the marking (arrow B) in the coolant expansion reservoir (2).

If the coolant level is too low,



Check cooling system for leak tightness and coolant for antifreeze content.



Coolant specifications

BB00.40-P-0310-01A

 After obtaining special order.



Install

4

Seal coolant expansion reservoir (2) with cap (1).