Inspect cooling system for leaks

AR20.00-P-1010SXD

Inspect cooling system for leaks

05.12.2018

Engine

629 in model 221

Shown on engine 273

1

2-stage cap

2

Expansion reservoir

3

Tester cap

4

Pressure pump

 

Remove/install

 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

1

Open 2-stage cap (1) on expansion reservoir (2)

2

Set heater switches to maximum heat output



Check

3

Check coolant level and correct if necessary

AR20.00-P-1142SXD

Topical note

Notes on coolant

AH20.00-N-2080-01A

Notes on coolant level

AH20.00-P-1142-01CW

 If it does not contain enough antifreeze, replace coolant after obtaining a special work order:


4

Mount tester cap (3) on the expansion reservoir

 Test cap

*210589009100

5

Connect pressure pump (4)

 Pressure pump

*124589242100

6

Apply pressure to cooling system and check leak tightness of the cooling system

Test pressure for pressure-testing the engine cooling system

*BE20.30-P-1005-01A

7

Check cooling and heating hoses and their connections for proper condition and coolant loss; replace coolant hoses if necessary

8

Check hose clamps for proper condition and seating

 Retighten hose clamps if necessary; replace if applicable.

9

Install in the reverse order

Radiator or expansion reservoir cap

Number

Designation

1-stage cover latch

Engine 100, 102, 103, 104, 110, 111, 112, 113, 114, 115, 116, 117, 119, 120, 121, 123, 127, 129, 130, 133, 137, 139, 152, 155, 156, 157, 159, 166, 180, 256, 260, 264, 266, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 282, 285
2-stage latch cover
Engine 601, 602, 603, 604, 605, 606, 607, 608, 611, 612, 613, 615, 616, 617, 621, 626, 628, 629, 640, 642, 646, 648, 651, 654, 656, 668
2-stage latch cover

BE20.30-P-1005-01A

Test pressure for pressure-testing the engine cooling system

Overpressure

bar

1,4

1,4