Remove/install rocker arm assembly

AR05.00-W-5521D

13.3.01

ENGINE 457.9 in MODEL 374, 375, 940, 942, 943, 944, 958

W05.00-1014-11

Illustrated on model 944

1 Bolt

2 Rocker arm assembly

3 Valve bridges

L Shank length

Modification notes

11.8.04

Measure shank length of bolts - added

Step 4

 	Remove/install
1	Remove cylinder head cover	 Installation: Only install cylinder head cover after the valve clearance has been adjusted.	AR01.20-W-5014C
2	Remove rocker arm assembly (2)	 Installation: Check rocker arm assembly (2) for wear and if necessary: 
		Disassemble the rocker arm assembly (2) and replace worn parts	AR05.00-W-5541B
		Lubricate tappet rods with engine oil and ensure they are correctly located in the roller tappets.
			*BA05.00-N-1001-01J
3	Take off valve bridges (3).	 Installation: Check valve bridges (3) for wear; replace if necessary.
4	Measure shank length (L) of the bolts (1)	Replace the bolt (1) in question if the maximum shank length (L) was exceeded.	*BE05.30-N-1001-04I
5	Install in the reverse order
6	Check valve clearance, set if necessary
	Set valve clearance		AP05.30-W-0560C

Test values for valve timing

Number	Designation			Engine 457.9


BE05.30-N-1001-04I	Bolt connecting rocker arm bearing bracket to cylinder head	Thread diameter	M	10
		Permissible shank length	mm	91

 Engine timing - general

Number	Designation			Engine 457


BA05.00-N-1001-01J	Bolt connecting rocker arm bracket to cylinder head	Stage 1	Nm	60
		Stage 2	°	90