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Home >> Mercedes Benz >> 2017 >> GLS550 >> Repair and Diagnosis >> Engine Mechanical >> Accessory Drive Belts >> Air Compressor, Belt Drives - 166 Chassis >> Testing & Repair >> Remove/Install Belt Drive Components >> Remove/Install Belt Drive Components - AR13.20-P-0001OGR

Remove/Install Belt Drive Components - AR13.20-P-0001OGR

Engine 642 in model 166, 292 

G14134241Courtesy of MERCEDES-BENZ USA
WARNING Risk of injury  . Moving parts can pinch, crush or, in extreme cases even sever extremities. No parts of the body or limbs should be within the operating area of mechanical components when moving components. AS00.00-Z-0009-01A
REMOVING Remove     
1 Remove engine charge air duct upstream of charge air cooler   AR09.41-P-8623OGR
2 Remove bracket for impact plate at timing case cover    
3 Loosen poly-V belt (1) and remove    
REFER TO SHOP-MADE TOOLS     WF58.50-P-1325-02A
    IMPORTANT Turn tensioning device (2) in direction "RELEASE" and lock in place with a drift.
INSTALLATION IMPORTANT
Do not use belt wax or similar products. This leads to slipping of the poly-V belt (1).
 
4 Remove screw/bolts (3) of tensioning device (2) When removing the clamping device (2)  
5 Remove tensioning device (2) When removing the clamping device (2)  
6 Remove pin and detention tensioning device (2) When replacing the clamping device (2)  
7 Remove guide pulleys (4) When removing the guide pulley (4)
IMPORTANT To do this remove cover on the guide pulley (4) and remove underlying screw/bolt.
 
INSPECT Check     
8 Check profile of belt pulley, tensioning device (2) and guide pulleys (4) for damage and soiling and replace if necessary    
9 Check poly-V belt (1) for wear and damage and replace if necessary    
REFER TO MAINTENANCE     AP13.22-P-1352CW 
INSTALLING Install     
10 Install guide pulleys (4) When installation the guide pulleys (4)  
    TORQUE SPECIFICATION Screw/bolt, tensioning device to oil pan *BA13.25-P-1002-01T 
11 Place clamping device (2) on engine with screw/bolt (3) When installing the clamping device (2)  
12 Tighten screw/bolt (3) When installing the clamping device (2)  
    TORQUE SPECIFICATION Screw/bolt, tensioning device to crankcase *BA13.25-P-1001-01T 
13 Tighten tensioning device (2) and lock in place with a pin When replacing the clamping device (2)  
14 Fit on poly V-belt (1) Routing diagram for poly-V belt
IMPORTANT Observe poly-V belt routing diagram.
AR13.22-P-3902-02TI 
15 Pull pin out of clamping device (2) and release clamping device    
16 Install bracket for impact plate at timing case cover    
17 Install engine charge air duct upstream of charge air cooler   AR09.41-P-8623OGR
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. AS00.00-Z-0005-01A
18 Carry out an engine test run    
BELT TENSIONING DEVICE

Number Designation Engine 642
BA13.25-P-1001-01T Screw/bolt, tensioning device to crankcase Nm 58
BELT TENSIONING DEVICE

Number Designation Engine 642
BA13.25-P-1002-01T Screw/bolt, tensioning device to oil pan Nm 30