Remove/install rocker arms - AR05.20-P-2340AU

ENGINE 112 

ENGINE 113 except CODE (479) Cylinder shutoff 

ENGINE 112.945 in MODELS 463.209 /232 /233 /244 /245 /250 

ENGINE 113.962 in MODELS 463.206 /240 /241 /247 /248 /249 /254 

ENGINE 113.982 in MODELS 463.243 /246 

Shown on engine 112 

Fig 1: Identifying Rocker Arm Components - Shown On Engine 112

	Removing
1	Remove camshaft bearing bridge	Pay attention to slackening diagram.
		All models except 171.473, 164.175, 251.075/175, 219.375/376	AR05.20-P-7103AU
		Model 164.175	AR05.20-P-7103GZ
		Models 251.075/175	AR05.20-P-7103RT
		Models 219.375/376	AR05.20-P-7103TY
		Model 171.473	AR05.20-P-7103VT
	Risk of injury  to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
2	Remove the rocker arm spindles (3)	If the rocker arm spindle (3) is not able to move easily in its bearings (clamps), the camshaft bearing bridge must be warmed up: ↓
		Warm up camshaft bearing bridge	AR05.20-P-2350AU
		Drift punch	Fig 2
		Support plate	Fig 5
		Recirculated air warming cabinet	*WH58.30-Z-1001-28A
		Heating oven	*WH58.30-Z-1003-28A
3	Remove rocker arm (2)	Take out 15 mm dia. drift (1).
	Install
4	Check bearing surfaces of rocker arm (2) for damage	Pay attention to any long score marks caused by the removal of the rocker arm spindles (3). If damage is present ↓ Replace rocker arms (2).
5	Introduce guide shaft into camshaft bearing bridge	At the same time preassemble the rocker arms (2) on the guide shaft.
		16 mm dia. guide shaft	Fig 3
		18 mm dia. guide shaft	Fig 4
	Risk of injury  to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
6	Install the rocker arm spindles (3)	If the rocker arm spindle (3) cannot be easily introduced into its bearings (clamps), the camshaft bearing bridge must be warmed up: ↓
		Heat the camshaft bearing bridge and drive out the guide shaft with the rocker arm spindle (3).	AR05.20-P-2350AU
		Ensure that the rocker arms (2) do not get jammed.
		Recirculated air warming cabinet	*WH58.30-Z-1001-28A
		Heating oven	*WH58.30-Z-1003-28A
7	Install camshaft bearing bridge	Observe tightening pattern.
		All models except 171.473, 164.175, 251.075/175, 219.375/376	AR05.20-P-7103AU
		Model 164.175	AR05.20-P-7103GZ
		Models 251.075/175	AR05.20-P-7103RT
		Models 219.375/376	AR05.20-P-7103TY
		Model 171.473	AR05.20-P-7103VT
			*BA05.20-P-1002-01B
			*BA05.20-P-1004-01B

CAMSHAFT

CAMSHAFT

CAMSHAFT

Fig 2: Identifying Extraction Drift (112 589 00 15 00)

Fig 3: Identifying Guide Shaft (112 589 02 31 00)

Fig 4: Identifying Guide Shaft (112 589 03 31 00)

Fig 5: Identifying Board (112 589 10 59 00)