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Home >> Mercedes Benz >> 2017 >> GT AMG >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System (2 Of 2) -- 190 Chassis >> Testing & Repair >> Check Evaporator For Leaks - AR83.30-P-5550NKB

Check Evaporator For Leaks - AR83.30-P-5550NKB

Model 117, 156, 172, 176, 190, 231, 242, 246 

MODIFICATION NOTES

05.10.2016 Safety note added AS83.00-Z-0006-01A  
26.09.2016 Safety note added AS83.00-Z-0007-01A  
26.09.2016 General note added AH83.30-P-0003-02A  
G16685816Courtesy of MERCEDES-BENZ USA
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.
Model 117, 156, 172, 176, 190, 231, 242, 246 with code 2U8 (Alternative refrigerant)		 AS83.00-Z-0007-01A
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.
Model 117, 156, 172, 176, 190, 231, 242, 246 except code 2U8 (Alternative refrigerant)		 AS83.00-Z-0006-01A
Notice  Protect air conditioning circuit and components from moisture when carrying out repair work   AH83.30-P-0005-01KOA
Notice  Procedure for a damaged or leaky air conditioning system   AH83.30-P-0004-01KOA
  Notes on handling refrigerant R134a Model 117, 156, 172, 176, 190, 231, 242, 246 except code 2U8 (Alternative refrigerant) AH83.30-P-0003-01KOA
  Notes on handling refrigerant R1234yf Model 117, 156, 172, 176, 190, 231, 242, 246 with code 2U8 (Alternative refrigerant) AH83.30-P-0003-02A
INSPECT Check     
1 Remove expansion valve Model 172.4 AR83.30-P-5520V
    with code 580 (Air-conditioning system)
Model 172.4
with code 581 (Automatic climate control)		  
    Model 190 AR83.30-P-5520RQ 
    Model 231 AR83.30-P-5520RK
    Model 117, 156, 176, 242, 246 AR83.30-P-5520NKB
2.1 Install adapter (1) in place of expansion valve with new sealing rings (2, 6) Model 117, 156, 176, 242, 246  
    TORQUE SPECIFICATION Bolt, expansion valve *BA83.30-P-1001-01G 
    SPECIAL TOOL Adapter Fig 2
2.2 Install adapter (1) with adapter hose in place of expansion valve with new sealing rings (2, 6) Model 172, 190, 231  
    TORQUE SPECIFICATION Model 190
Nut on expansion valve		 *BA83.30-P-1009-01M 
    TORQUE SPECIFICATION Model 172
Bolt, expansion valve		 *BA83.30-P-1002-01D 
    TORQUE SPECIFICATION Model 231
Screw/bolt on expansion valve		 *BA83.30-P-1002-01A 
    SPECIAL TOOL Adapter Fig 1
    SPECIAL TOOL Adapter hose Fig 3
3 Connect leak tester to adapter (1)    
REFER TO SPECIAL TOOLS 000 588 37 21 00 Leak tester   WS83.00-P-0067B 
4 Check evaporator for leaks using forming gas Model 117, 156, 172, 176, 190, 231, 242, 246  
    IMPORTANT The system pressure must be maintained for at least 4 h.
IMPORTANT The leak tester operator's manual must be observed.
IMPORTANT Temperature changes during the pressure test can cause pressure surges, e. g. due to weather changes, transition from day to night, cooling down of engine compartment. Ensure that the ambient conditions are identical.
If a pressure drop is determined
↓
Replace evaporator		  
    Model 117, 156, 176, 242, 246 AR83.30-P-5540NKB
    Model 172.4
with code 580 (Air-conditioning system)
Model 172.4
with code 581 (Automatic climate control)		 AR83.30-P-5540W
    Model 231 AR83.30-P-5540RK
5 Disconnect leak tester from adapter (1)    
6.1 Remove adapter (1) Model 117, 156, 176, 242, 246  
    SPECIAL TOOL Adapter Fig 2
6.2 Remove adapter (1) and adapter hose Model 172, 190, 231  
    SPECIAL TOOL Adapter Fig 1
    SPECIAL TOOL Adapter hose Fig 3
7 Install expansion valve   AR83.30-P-5520RQ 
    Model 190  
    Model 172.4
with code 580 (Air-conditioning system)		 AR83.30-P-5520V
    Model 172.4
with code 581 (Automatic climate control)		  
    Model 231 AR83.30-P-5520RK
    Model 117, 156, 176, 242, 246
IMPORTANT expansion valve must be installed with new sealing rings (2, 6).		 AR83.30-P-5520NKB
AIR CONDITIONING

Number Designation Model 117 Model 156
BA83.30-P-1001-01G Bolt, expansion valve Nm 3, 5 3, 5
AIR CONDITIONING

Number Designation Model 176, 246 Model 242
BA83.30-P-1001-01G Bolt, expansion valve Nm 3, 5 3, 5
AIR CONDITIONING

Number Designation Model 231
BA83.30-P-1002-01A Screw/bolt on expansion valve Nm 5, 5
AIR CONDITIONING

Number Designation Model 172
BA83.30-P-1002-01D Bolt, expansion valve Nm 5
AIR CONDITIONING

Number Designation Model 190
BA83.30-P-1009-01M Nut on expansion valve Nm 8
Fig 1: Identifying Adapter (463 589 01 63 00)
G09977794Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Adapter (246 589 02 63 00)
G10250733Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Adapter Hose (140 589 51 63 01)
G09977795Courtesy of MERCEDES-BENZ USA
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