Remove/install compressor · ar1330w5510c · Mercedes-Benz WIS

AR13.30-W-5510C

Remove/install compressor

04.12.2019

Engine	457.9 in model 374, 375, 940, 942, 943, 944, 958
	with code MZ7 (Air compressor, 1-cylinder, regulated)

W13.30-1086-09

Shown on model 944

1	Power steering pump	5	Suction pipe	9	Screw
2	Coolant line (return flow)	6	Oil separator	10	Sealing ring
3	Compressed-air line	7	Control line	11	Coolant line (feed)
4	Resonator	8	Compressor

Shown on model 944

1	Power steering pump
2	Coolant line (return flow)
4	Resonator
5	Suction pipe
6	Oil separator
7	Control line
8	Compressor
12	Cross plate
13	Sealing rings
14	Sealing ring
15	Drive gear

W13.30-1087-06

 Warning	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
 Warning	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
 Warning	Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.	Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
 Caution	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
Topical note	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
Topical note	Notes on coolant		AH20.00-N-2080-01A
	Note on calculation of tightening torque when using insertion or socket tools with various effective lengths		AH00.00-P-0015-01CW
	Notes on engine oil		AH18.00-N-0101-01HA
 	Remove/install
1	Remove oil separator (6)	Model 375, 944 with engine 457.9 up to engine end number 036947	AR01.20-W-9750C
		Model 374, 940, 942, 943; Model 375, 944 with engine 457.9 as of engine end number 036948	AR01.20-W-9750CA
		 Model 958 Work instructions have not been created for these vehicles.
2	Partially drain coolant at radiator		AR20.00-W-1142B
		 Collect escaping coolant in a clean vessel.
3	Disconnect suction line (5) on resonator (4)	 Installation: Check sealing ring of suction line (5) for damage.
		If sealing ring is damaged.
		
		Replace suction line (5).
4	Remove screw (9) and remove resonator box (4)	 Installation: Replace sealing ring (10).
5	Remove coolant line (2) from compressor (8)	 Collect the escaping coolant in a suitable container.
		 Installation: Install new sealing rings.
		 Banjo bolt, coolant line to compressor	*BA13.30-N-1002-01L
6	Remove coolant line (11) from compressor (8)	 Counterhold fitting on compressor (8) and catch escaping coolant.
		 Banjo bolt, coolant line to compressor	*BA13.30-N-1002-01L
7	Disconnect compressed air line (3) at connecting point and remove at holder
8	Remove compressed-air line (3) from compressor (8) and check for carbonization	 Counterhold fitting on compressor (8).
		If compressed-air line (3) carbonized.
		
		Replace air line (3). In addition, check compressed-air lines between compressor (8), compressed-air drier and four-circuit protection valve.
		If the compressed-air lines between the compressor (8), the compressed-air drier or the four-circuit protection valve are carbonized.
		
		Replace respective compressed-air line.
9	Remove control line (7) on compressor (8)	 Installation: Install new sealing rings.
		 Banjo bolt, control line to compressor	*BA13.30-N-1006-01L
10	Remove power-steering pump (1) on compressor (8)	 Do not disconnect steering gear oil lines.
		 Installation: Replace sealing ring on power-steering pump (1).
		 Bolt, power steering pump to compressor	*BA46.30-N-1001-01R
11	Remove cross plate (12) on power steering pump (1) or on compressor (8)	 Installation: Insert cross plate (12) into compressor (8) and secure against slipping with high-temperature grease.
		High-temperature grease	*BR00.45-Z-1051-06A
12	Remove compressor (8) from timing case	 Collect escaping engine oil.
		 Installation: Turn drive gear (15), if necessary.
		 Bolt, compressor to crankcase	*BA13.30-N-1001-01L
13	Check drive gear (15) and drive gear on the camshaft for damage	 Visual inspection.
		If the drive gear (15) on the compressor (8) is damaged.
		
		replace drive gear (15).
			AR13.30-W-7043C
		If the drive gear on the camshaft is damaged.
		
		Replace drive wheel or camshaft.
		Remove/install camshaft	AR05.20-W-6292C
14	Remove sealing rings (13, 14) on compressor (8)	 Installation: Replace sealing rings (13, 14).
15	Remove fitting of compressed-air line (3) and the fitting to which the resonator box (4) is mounted	Only if compressor (8) was replaced or fitting is leaky.
		 Installation: Install new sealing rings.
		 Fitting, compressed air line to compressor	*BA13.30-N-1004-01L
		 Fitting, suction line to compressor	*BA13.30-N-1005-01L
16	Remove fitting of the coolant line (2) from the compressor (8)	Only up to engine end number 029766 If compressor (8) is to be replaced or if fitting is leaky.
		 Installation: Replace sealing ring.
		 Fitting, coolant line to compressor	*BA13.30-N-1008-01L
17	Unscrew fitting of coolant line (11) on compressor (8)	Only if compressor (8) is to be replaced or if fitting is leaky.
		 Installation: Replace sealing ring.
		 Fitting, coolant line to compressor	*BA13.30-N-1008-01L
18	Install in the reverse order
19	Check engine oil level with oil dipstick or on display, add oil if necessary	 Observe engine oil quality set in maintenance system or Specifications for Operating Fluids.
20	Fill in coolant		AR20.00-W-1142B
21	Start engine and perform an engine test run
22	Check compressed air line (3) for leakage	 Visual inspection.
23	Turn off engine and check near compressor (8) for leak tightness	 Visual inspection.