Check Basic Position Of Camshafts - Ar05.20-D-6010TSC

Engine 274 in model 907 

View from rear 

View from front 

	Risk of injury  . Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
	Risk of injury  to skin and eyes due to handling of engine oil. Risk of poisoning  caused by swallowing engine oil	Wear protective gloves, protective clothing and safety glasses. Do not fill engine oil into beverage containers.	AS18.00-Z-0001-01A
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Remove
1	Remove both position sensors of camshafts.	Position sensor of intake camshaft	AR07.04-D-0056TSC
		Position sensor of the exhaust camshaft	AR07.04-D-0057TSC
2	Rotate the engine at crankshaft center bolt in direction of engine rotation with the aid of a telescope mirror (4) to ignition TDC on cylinder 1.	The TDC marking (05) on the belt pulley must align with the positioning edge on the timing case cover (06). WIS Service Media wsm://04  201900_31 Operation step 2 is shown. Commercially available devices/tools  Telescope mirror (4)
		Socket wrench bit	Fig 1
	Check
3	Check basic position of camshafts.	The basic position of the camshafts is checked by a visual inspection over the bores of the position sensors of the camshafts on cylinder head cover (3). The basic position of the exhaust camshaft is correct when the edge (1a) of the partial segment of the segmented disc (1) is visibly in the center in the bore. The basic position of the intake camshaft is correct when the edge marking (2a) of the segmented disc (2) is visibly in the center in the bore. If basic position is not correct, ↓ set basic position of camshafts.
			AR05.20-D-6020TSC
	Install
4	Install position sensors of camshafts.	Position sensor of the exhaust camshaft	AR07.04-D-0057TSC
		Position sensor of intake camshaft	AR07.04-D-0056TSC

Fig 1: Socket Wrench Bit (001 589 65 09 00)