Check basic position of camshafts

AR05.20-D-6010SF

17.05.2018

Engine	642 in model 470, 471
Engine	642.896/898/992/993 in model 906

Shown on model 906

1	Camshafts
2	Camshaft bracket
3	Hold-down tool

D05.20-1126-03

D05.20-1125-09

1	Camshafts		5	Markings		7	Timing case cover
4	Markings		6	Vibration damper

	Remove
1.1	Remove viscous fan clutch	Model 906
			AR20.40-D-5660SF
1.2	Remove fan unit.	Model 470, 471
			AR20.40-S-5050PS
2	Remove right cylinder head cover.	Model 470, 471	AR01.20-S-5012PS
		Model 906	AR01.20-D-5012SF
3	Remove left cylinder head cover.	Model 470, 471	AR01.20-S-5013PS
		Model 906	AR01.20-D-5013SF
	Check
Topical note	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
4	Attach hold-down tool (3) to middle bearing positions of the cylinder heads	 The  hold-down tool (3) assume function of camshaft bearings and relieve the load on camshaft brackets (2).
		 Holddown device kit	*642589003100
5	Turn the engine on the top dead center (TDC) on the 1st cylinder (ignition dead center) and check the markings (4, 5) of the camshafts (1) as well as the TDC marking of the vibration damper (6).	Model 470, 471	AR01.00-S-0100PS
		Model 906	AR01.00-D-0100SF
		 The markings (5) on the camshafts (1) must be aligned with each other and the markings (4) on camshafts must, seen in the direction of travel, be aligned with the upper edge of the cylinder head and lie on the left-hand side. The TDC marking (arrow) on vibration damper (6) must be aligned with stay on timing case cover (7).
		If the basic position of the camshafts (1) is incorrect,
		
		check the timing chain for damage or chain elongation.
			AR05.10-D-7600M
6	Remove the hold-down tool (3) from the center bearing positions of the cylinder heads.
	Install
7	Install left cylinder head cover.	Model 470, 471	AR01.20-S-5013PS
		Model 906	AR01.20-D-5013SF
8	Install right cylinder head cover.	Model 470, 471	AR01.20-S-5012PS
		Model 906	AR01.20-D-5012SF
9.1	Install viscous fan clutch.	Model 906
			AR20.40-D-5660SF
9.2	Install fan unit.	Model 470, 471
			AR20.40-S-5050PS

642 589 00 31 00

Holddown device kit

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