Test the turbocharger

AR09.40-W-5910A

19.9.06

ENGINE 902.9 in MODEL 957 with CODE (MS8) Natural gas engine

ENGINE 904.9 in MODEL 374, 375, 673, 674, 676, 958, 970, 972, 975, 976

ENGINE 906.9 in MODEL 374, 958, 970, 972, 974, 975, 976

ENGINE 906.9 in MODEL 374, 375, 950, 952, 953, 954, 957, 958

W09.40-0012-06

Shown on engine 904.9 with boost pressure control (wastegate valve)

1 Turbocharger

3 Rotor shaft

4 Control flap (only with boost pressure control with wastegate valve)

5 Control flap shaft (only with boost pressure control with wastegate valve)

6 Control canister (only with boost pressure control with wastegate valve)

Modification notes

16.3.05	Inspect turbocharger and intake hose for oil deposits	Step 3
16.3.05	Check position of control flap	Step 5

	Checking
1.1	Remove engine brake flap connection	Engine 904.9	AR14.15-W-6302A
		Engine 906.9 without code (MS8) natural gas engine	AR14.15-W-6302F
1.2	Remove exhaust connection between turbocharger and exhaust pipe	Engine 902.9, 906.9 with code (MS8) natural gas engine  No removal/installation instructions have been prepared for this model.
2.1	Remove intake hose	Model 374, 375, 950, 952, 953, 954, 958, 970, 972, 974, 975, 976
2.2	Remove air intake pipe	Model 957 without code (MS8) Natural gas engine	AR09.10-W-8131B
		Model 957 with code (MS8) Natural gas engine	AR09.10-W-8131H
3	Check turbocharger (1) and intake hose for oil deposits
	Notes for evaluation of turbocharger in the event of engine blue smoke.		AH09.40-N-0001-01A
4	Inspect axial play and radial play at rotor shaft (3)	 If the rotor shaft (3) does not scrape on the turbocharger housing on both sides then the axial play and radial play is OK.	AR09.40-W-5910-01A
		If the rotor shaft (3) scrapes on the turbocharger housing, replace turbocharger (1):
		
		Engine 904, 906 without code (MS8) natural gas engine	AR09.40-W-6020A
		Engine 902, 906 with code (MS8) natural gas engine	AR09.40-W-6020H
5	Check position of control flap (4) to turbocharger housing	 Only with boost pressure control with wastegate valve.
		In closed position, control flap (4) must lie adjacent to turbocharger housing with a preload. If the control flap (4) does not fit, replace the turbocharger (1): 
		Engine 904, 906 without code (MS8) natural gas engine	AR09.40-W-6020A
		Engine 902, 906 with code (MS8) natural gas engine	AR09.40-W-6020H
6	Check control flap (4) and control flap shaft (5) for damage and wear in turbocharger housing.	 Only with boost pressure control with wastegate valve. Replace turbocharger (1) if necessary: 
		Engine 904, engine 906 without code (MS8) natural gas engine	AR09.40-W-6020A
		Engine 902, 906 with code (MS8) natural gas engine	AR09.40-W-6020H
7	Check control canister (6)	 Only with boost pressure control with wastegate valve.	AR09.40-W-5910-02A
			*124589152100
		In the case of loss of pressure replace turbocharger (1): 
		Engine 904, engine 906 without code (MS8) natural gas engine	AR09.40-W-6020A
		Engine 902, 906 with code (MS8) natural gas engine	AR09.40-W-6020H
8.1	Install intake hose	Model 374, 375, 950, 952, 953, 954, 958, 970, 972, 974, 975, 976
8.2	Install air intake pipe	Model 957 without code (MS8) Natural gas engine	AR09.10-W-8131B
		Model 957 with code (MS8) Natural gas engine	AR09.10-W-8131H
9.1	Install engine brake flap connection	Engine 904.9	AR14.15-W-6302A
		Engine 906.9 without code (MS8) natural gas engine	AR14.15-W-6302F
9.2	Remove exhaust connection between turbocharger and exhaust pipe	Engine 902.9, 906.9 with code (MS8) natural gas engine  No installation instructions have been prepared for this model.

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Testing unit

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