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Remove/Install Belt-Driven Starter-Alternator Coolant Pump - AR20.10-P-1282MRI

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Engine 264 in model 205, 253 

with code B01 (48V technology) 

MODIFICATION NOTES

17.05.2019 Special tool updated. Operation step 6.  
17.05.2019 Basic data object updated. Operation steps 2, 5 and 8.  
Fig 1: Belt-Driven Starter-Alternator Coolant Pump Components Location - Engine 264 In Model 253 With Code B01 (Shown On Model 205)
G14470834Courtesy of MERCEDES-BENZ USA

Shown on model 205 with code B01 (48V technology) 

WARNING Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray. 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 
Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Drain off coolant.   AR20.00-P-1142MRI 
2 Remove screw (5). TORQUE SPECIFICATION Screw, coolant line to coolant pump holder *BA20.20-P-1003-02B 
3 Unclip electric line (4) from bracket (7).    
4 Release and disconnect electrical connection (3).    
5 Remove screw/bolts (6). TORQUE SPECIFICATION Bolt, bracket to engine support *BA22.10-P-1004-02D 
6 Remove coolant hoses (1, 2) from starter-alternator coolant pump (M43/4) and electric coolant pump 2 (M43/1) and seal with suitable protective covers.   AR20.20-P-7441-01RQ 
    SPECIAL TOOL Set of protective caps Fig 2
7 Remove starter-alternator coolant pump (M43/4) and electric coolant pump 2 (M43/1) with the bracket (7).    
8 Remove starter-alternator coolant pump (M43/4) and electric coolant pump 2 (M43/1) from bracket (7). When installing a new starter-alternator coolant pump (M43/4) or electric coolant pump 2 (M43/1).  
    TORQUE SPECIFICATION Screw, coolant pump holder to engine carrier *BA20.20-P-1004-02B 
9 Install in the reverse order.    
ENGINE RADIATOR, COOLANT HOSES AND LINES

Number Designation Engine 264
BA20.20-P-1003-02B Screw, coolant line to coolant pump holder M6 Nm 8
ENGINE RADIATOR, COOLANT HOSES AND LINES

Number Designation Engine 264
BA20.20-P-1004-02B Screw, coolant pump holder to engine carrier M6 Nm 8
ENGINE SUPPORT (ENGINE SIDE)

Number Designation Engine 264
BA22.10-P-1004-02D Bolt, bracket to engine support M6 Nm 8
Fig 2: Identifying Set Of Protective Caps (001 589 00 91 00)
G12079434Courtesy of MERCEDES-BENZ USA