Inspect Cooling System For Leaks - AR20.00-P-1010W
Engine 152, 276 in model 172
Shown on model 172 with engine 276.9
| Risk of injury to skin and eyes suffering scalding from contact with hot coolant spray. 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 | |
| Notes on coolant level | AH20.00-P-1142-01CW | ||
| Remove | |||
| 1 | Switch on ignition | ||
| 2 | Adjust heater to maximum heat output | ||
| 3 | Remove lower engine compartment paneling | AR61.20-P-1105W | |
| 4 | Unscrew cap (1) on expansion reservoir (2) slowly | ||
| 5 | Check coolant level and antifreeze content of coolant; correct if necessary | *BF20.00-P-1001-06C | |
Engine 276.9 in model 172 Cooling system |
*BF20.00-P-1001-02BA | ||
| 6 | Mount tester cap (3) onto expansion reservoir (2) | Fig 1 | |
| 7 | Connect pressure pump (4) at tester cap (3) | Fig 2 | |
| 8 | Apply a test pressure to the engine cooling system for 2 minutes | Do not exceed the specified test pressure. Damage can occur on the engine cooling system otherwise. |
|
| Test pressure for pressure-testing the engine cooling system | *BE20.30-P-1005-01A | ||
| Check | |||
| 9 | Check all coolant carrying assembly parts and connection for coolant loss | In the event of pressure loss. There is no visible coolant loss recognizable. ↓ Check coolant carrying assembly parts for inner leak tightness. |
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| Install | |||
| 10 | Drain off overpressure over valve at pressure pump (4) | ||
| 11 | Detach pressure pump (4) from tester cap (3) | ||
| 12 | Detach tester cap (3) on expansion reservoir (2) | ||
| 13 | Switch off ignition | ||
| 14 | Check coolant level and antifreeze content of coolant; correct if necessary | *BF20.00-P-1001-06C | |
Engine 276.9 in model 172 Cooling system |
*BF20.00-P-1001-02BA | ||
| 15 | Screw cap (1) onto expansion reservoir (2) | ||
| 16 | Install lower engine compartment paneling | AR61.20-P-1105W |
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 |
COOLING SYSTEM
| Number | Designation | Engine 276.8 in model 172 | Engine 276.9 in model 172 | |||
|---|---|---|---|---|---|---|
| BF20.00-P-1001-02BA | Cooling system | Workshop replacement amount | Main circuit | L | ≈ 10, 4 | ≈ 10, 4 |
| Low-temperature circuit | L | ≈ 3, 4 | - | |||
| Antifreeze/water | Up to -37°C | % | 50/50 | 50/50 | ||
| As of -38°C | % | 55/45 | 55/45 | |||
| Specifications for Operating Fluids | BB00.40-P-0310-01A | BB00.40-P-0310-01A | ||||
| Specifications for Operating Fluids | BB00.40-P-0325-06A | BB00.40-P-0325-00A | ||||
| Specifications for Operating Fluids | BB00.40-P-0326-06A | BB00.40-P-0326-00A | ||||
COOLING SYSTEM
| Number | Designation | Engine 152 in model 172 | |||
|---|---|---|---|---|---|
| BF20.00-P-1001-06C | Cooling system | Workshop replacement amount | Liter | ≈ 9, 5 | |
| Antifreeze/water | Down to -37°C | % | 50/50 | ||
| -38°C and below | % | 55/45 | |||
| Specifications for Operating Fluids | BB00.40-P-0310-01A | ||||
| Specifications for Operating Fluids | BB00.40-P-0325-00A | ||||
| Specifications for Operating Fluids | BB00.40-P-0326-00A | ||||