1 | Pressure-side testing and filling valve |
2 | Pressure gage |
3 | Suction side testing and filling valve |
T83.30-0081-11
4 | Protective cap |
5 | Filter dryer manual shutoff valve |
6 | Condenser fan electrical connector |
T83.30-0083-11
7 | Clutch hub |
T83.30-0084-01
| Remove | ||
Warning | Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | |
Danger | Risk of explosion caused by welding or soldering work on closed air conditioning system. Risk of poisoning caused by 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 drained. | |
Danger | Risk of death caused by falling from vehicle roof. Risk of injury to other persons caused by falling objects during work in roof area. | ||
Topical note | Protect air conditioning circuit and components from moisture when carrying out repair work | ||
Topical note | Procedure for a damaged or leaky air conditioning system | ||
Notes on handling refrigerant R134a | |||
1 | Unscrew plugs over pressure side test and filling valve (1) and intake side test and filling valve (3) | ||
2 | Connect air conditioning vacuum and recycling unit to pressure side test and filling valve (1) and to intake side test and filling valve (3) | Observe operating instructions for air conditioning vacuum and recycling unit. | |
3 | Remove paneling of condenser unit | ||
4 | Open left trim of evaporator unit | ||
Only perform operation steps for opening. | |||
5 | Start engine | ||
6 | Switch on air conditioning | See air conditioning system operating instructions | |
Check high-pressure switch | |||
7 | Disconnect fan electrical connector (6) with aid of helper | ||
8 | Observe pressure display on manometer (2) | | |
If high-pressure switch shutoff pressure is exceeded and the coupling hub (7) rotates, | |||
the high-pressure switch must be replaced: | |||
| |||
Remove/install the air conditioning's high-pressure switch (roof equipment) | |||
High-pressure switch shutoff pressure | |||
9 | Connect fan electrical connector (6) | ||
10 | Observe pressure display on manometer (2) | If high-pressure switch cut-in pressure is undershot and the coupling hub (7) does not rotate, | |
the high-pressure switch must be replaced: | |||
| |||
Remove/install the air conditioning's high-pressure switch (roof equipment) | |||
High-pressure switch cut-in pressure | |||
Check low-pressure switch | |||
11 | Unscrew cover cap (4) | ||
12 | Slowly close filter dryer manual shutoff valve (5) until the low-pressure switch shutoff pressure is reached on the manometer (2) | | |
If the low-pressure switch shutoff pressure is undershot and the coupling hub (7) rotates, | |||
the low-pressure switch must be replaced: | |||
| |||
Remove/install the air conditioning's low pressure switch (roof equipment) | |||
Low-pressure switch shutoff pressure | |||
13 | Slowly open filter dryer manual shutoff valve (5) until the low-pressure switch cut-in pressure is reached on the manometer (2) | If the low-pressure switch cut-in pressure is exceeded and the coupling hub (7) does not turn, | |
the low-pressure switch must be replaced: | |||
| |||
Remove/install the air conditioning's low pressure switch (roof equipment) | |||
Low-pressure switch cut-in pressure | |||
| Install | ||
14 | Switch off the air conditioning | ||
15 | Turn off engine | ||
16 | Open filter dryer manual shutoff valve (5) fully | ||
17 | Screw on cover cap (4) | ||
18 | Close left trim of evaporator unit | ||
19 | Install condenser unit paneling | ||
20 | Remove air conditioning vacuum and recycling unit | ||
21 | Screw on plugs over pressure side test and filling valve (1) and intake side test and filling valve (3) |