Remove/Install Poly-V Belt - AR13.22-S-1202EG

Model 447, 448 With Engine 274 

Fig 1: Poly-V Belt Routing - Model 447 With Engine 274

Courtesy of MERCEDES-BENZ USA

	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Remove/install
1	Remove lower engine compartment paneling		AR61.20-S-1105E
2	Loosen poly-V belt (1)	: After assembly of the poly-V belt (1) the clamping device (2) must be pushed back on the serration (3) with torque clockwise. Noises and damage on the belt drive can occur otherwise. To do this, swivel tensioning device (2) on serration (3) in an counterclockwise direction (arrow). Pretension for poly-V belts on multi-tooth clamping device	*BA13.25-Z-1003-01KEG
3	Lock tensioning device (2)
	Pin for locking poly-V belt tensioning device	To do this bring bores (4) to the cover and lock clamping device (2) with pin.	WF58.50-S-1325-02S
4	Remove poly-V belt (1)	: Do not use belt wax or similar products. This avoids malfunctions.
		Relieve the clamping device (2) for any further work. : Observe routing diagram of poly-V belt (1).
	Check
5	Check belt pulley profiles, guide pulleys and clamping device (2) for damage and soiling; inspect and, if necessary, replace
6	Install in the reverse order

BELT TENSIONING DEVICE

Number	Designation		Engine 274 in model 447, 448
BA13.25-Z-1003-01KEG	Pretension for poly-V belts on multi-tooth clamping device	Nm	55