W83.20-1017-06
1 heater housing
2 Front air duct
3 Center air duct
4 Rear air duct
5 Coolant lines
6 Condensation hose
7 Air duct on right side of windshield
A13/X1 Heater housing connector
A13/X2 Heater housing connector
W83.20-1018-11
9 Cup seal
10 High pressure line (only with air conditioning)
11 Low pressure line (only with air conditioning)
12 Cover
13 Dust filter
14 Air filter housing
15 Clip nuts
| Remove/install | ||
Danger! | Risk of explosion caused by escaping oxyhydrogen gas. Risk of injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries caused by short circuit. Risk of poisoning caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices | No fire, sparks, open flames or smoking. Wear acid-resistant gloves and clothing and safety glasses with side guards. Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground. Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers. | |
1 | Disconnect ground lead from battery | Ensure that there is no unintentional contact between ground cable and negative terminal of battery. | |
| Notes on battery | ||
Danger! | Risk of explosion from welding or soldering work on closed air conditioning system. Risk of poisoning from inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with liquid refrigerant. | Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated areas. Carry out repair work on the air conditioning system circuit only after the system has been discharged. | |
2 | Discharge air conditioning system | Only with code H03. | |
| Notes on handling refrigerant R134a | All models with R134a refrigerant | |
| Conduct if air conditioning system is damaged or leaking | ||
| Protect air conditioning circuit and components from moisture when carrying out repair work | All models fitted with air conditioning | |
Danger! | Risk of injury to skin and eyes caused by 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. | |
3 | Drain coolant partially | Collect coolant | |
| Notes on coolant | ||
4 | Remove dashboard | ||
5 | Remove front air duct (2) | ||
6 | Remove center air duct (3) | ||
7 | Remove rear air duct (4) | ||
8 | Remove coolant lines (5) from heat exchanger | Installation: Replace oil seals | |
9 | Disconnect connectors (A13/X1, A13/X2) from heater housing (1) | ||
10 | Detach condensate hose (6) from heater housing (1) | ||
11 | Remove front right corner part | ||
12 | Remove cover (12) from dust filter housing | ||
13 | Remove dust filter (13) | ||
14 | Remove dust filter housing (14) from cab | ||
15 | Remove clip nuts (15) | ||
Danger! | Risk of injury caused by being caught or pinched as cab is tilted | Ensure that no one is within the tilting range of the cab as it is being tilted. Always tilt the cab all the way to the end position and secure with the safety strut. | |
16 | Tilt cab | Open front flap and release steering wheel adjustment. | |
| Notes on tilting the cab | ||
17 | Disconnect low-pressure line (11) at the radiator tunnel connecting point | | |
18 | Disconnect high pressure line (10) at the radiator tunnel connecting point | | |
19 | Lower cab | ||
20 | Release seal boot (9) from the radiator tunnel cable duct | Only with code H03. | |
21 | Release air duct for right side of windshield (7) | ||
22 | Unscrew screws (8) and remove heater housing (1) | ||
23 | Install in the reverse order | ||
24 | Evacuate air conditioning system, fill and carry out leak test | Only with code H03. | |
25 | Check coolant level, adjust to correct level | ||
26 | Check leaktightness of coolant lines | Bring engine to normal operating temperature and switch on heater. | |
27 | Perform a function test |
Refrigerant lines
Number | Designation | Model 957 with code H03 | ||
BA83.30-N-1002-02B | Union nut, high pressure refrigerant line to evaporator | WAF 19 | Nm | 20 |
BA83.30-N-1003-02B | Union nut, low pressure refrigerant line from evaporator | WAF 27 | Nm | 35 |
Engine cooling system
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