Shown on model 447.8 |
1 | Expansion rivet |
2 | Cover |
S54.35-4511-06
Shown on model 447.7 |
3 | Quick-release coupling |
4 | Right support brace |
5 | Quick-release coupling |
6 | Left support brace |
S83.30-A052-76
S83.30-A053-79
Shown on model 447.7 |
7 | Right air duct segment | 9.1 | Screw plug | 9.3 | Plug | ||
8 | Refrigerant condenser | 9.2 | Retaining ring | 9.4 | Desiccant cartridge |
Danger | Risk of fire due to ignition of R1234yf refrigerant on hot components. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with escaped R1234yf refrigerant and when working on pressurized parts. Risk of explosion due to formation of ignitable refrigerant/air mixtures | 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 rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated. | |
Warning | Risk of poisoning caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts | 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 rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated. | |
Topical note | Protect air conditioning circuit and components from moisture when carrying out repair work | ||
Notes on handling refrigerant R1234yf | |||
Notes on handling refrigerant R134a | |||
| Remove/install | ||
1 | Discharge air conditioning system. |
| |
Model 447 except code HX1 (R-1234yf refrigerant) | |||
2 | Remove expansion rivets (1) and remove trim (2). | ||
3 | Open quick-release fastener (3). | ||
4 | Unclip catch hook (arrow A) and remove right support (4). | ||
5 | Open quick-release fastener (5). | ||
6 | Unclip catch hook (arrow B) and remove left support (6). | ||
7 | Release right air duct segment (7) in upper area from cooler and push to one side. | ||
8 | Unscrew screw plug (9.1) from refrigerant condenser (8). | Installation: Replace screw plug (9.1). | |
9 | Remove retaining ring (9.2) from refrigerant condenser (8). | Installation: Replace retaining ring (9.2). | |
10 | Remove stop plug (9.3) and receiver drier (9.4) from refrigerant condenser (8). | ||
| Compressor oils (specification 362.1) | ||
Installation: Replace stop plug (9.3) and receiver drier (9.4). | |||
11 | Install in the reverse order. |