Remove/Install Vacuum Pump - AR43.05-P-1320LWA

Engine 274.9 in model 205 

Engine 274.9 in model 253 

Fig 1: Vacuum Pump for Brakes Components Location - Engine 274.9 in model 205

Courtesy of MERCEDES-BENZ USA

	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
	Risk of injury.  Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating area of mechanical components when moving components.	AS00.00-Z-0009-01A
	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
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Remove/install
1	Perform disable for high-voltage on-board electrical system	Engine 274.9 in model 205.047/147/247 Engine 274.9 in model 253.354/954
		Engine 274.9 in model 253.354/954	AR54.10-P-1150LVH
		Engine 274.9 in model 205.047/147/247	AR54.10-P-1150LW
2	Remove upper engine cover	: Do not install the upper engine cover until the leak check has been performed.
3	Remove engine air intake duct upstream of air filter
4	Unfasten rear engine mount from rear engine cross member, lift transmission and support		AR22.10-P-1160LWB
		To support the rear engine mount it is possible, for example, to use a 50x50 mm hard wood block.
5	Detach vacuum hose (4) from vacuum pump (1)
6	Detach vacuum line to brake booster from vacuum pump (1)
7	Unscrew bolts (3) and remove vacuum pump	: Install a new seal (2). Observe position of vacuum pump (1) driver.
		Bolt, vacuum pump to cylinder head/cylinder head cover	*BA43.05-P-1001-01K
8	Install in the reverse order
	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 buttoned-up and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
9	Perform an engine test run and check engine for proper operation and leak tightness
10	Install upper engine cover