Remove/install belt drive components - AR13.20-P-0001GQ

ENGINE 276.9 in MODEL 166 

Fig 1: Identifying Belt Drive Components Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury  caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.	No parts of the body or limbs should be within the operating area when the components are moving.	AS00.00-Z-0011-01A
1	Remove front engine cover
2	Slacken poly-V belt and remove	Routing diagram for poly-V belt Do not use belt wax or similar products. This leads to slipping of the poly-V belt. To do so, swivel clamping device (1) at hexagon (4) counterclockwise, remove poly-V belt and tension clamping device (1). Observe poly-V belt routing plan.	AR13.22-P-3902-02MM
	Check
3	Inspect belt pulley sections, clamping device (1) and guide pulleys (2, 3)	Check for damage, wear and dirt; replace if necessary.
4	Check poly-V belt
			AP13.22-P-1352EW
		Check for damage, wear and dirt; replace if necessary.
	Only perform steps 5 through 8 for remove/install of clamping device (1)
5	Lock clamping device (1)	Swivel clamping device (1) at hexagon (4) counterclockwise and lock in place using drift (5).
6	Remove screw/bolts on clamping device (1)	Screw/bolt, poly-V belt tensioning device to timing case cover	*BA13.25-P-1001-01X
7	Remove clamping device (1) upwards
8	Slacken clamping device (1)	When replacing the clamping device (1) Clamp clamping device (1) in a vise, swivel at hexagon (4) in a clockwise direction, pull out drift (5) and slacken clamping device (1). The clamping device (1) can only be installed when locked.
	Only perform operation steps 9 and 10 for removal/installation of guide pulleys (2, 3)
9	Remove bolts for guide pulleys (2, 3)	Screw/bolt, guide pulley to carrier	*BA13.25-P-1003-01X
		Screw/bolt, guide pulley to coolant pump	*BA13.25-P-1004-01X
10	Remove guide pulleys (2, 3)
11	Install in the reverse order

BELT TENSIONING DEVICE

Number	Designation		ENGINE 276
BA13.25-P-1001-01X	Screw/bolt, poly-V belt tensioning device to timing case cover	Nm	20

BELT TENSIONING DEVICE

Number	Designation		ENGINE 276
BA13.25-P-1003-01X	Screw/bolt, guide pulley to carrier	Nm	25

BELT TENSIONING DEVICE

Number	Designation		ENGINE 276
BA13.25-P-1004-01X	Screw/bolt, guide pulley to coolant pump	Nm	35