Checking oil pressure of power steering pump - AR46.30-P-0100VA

MODELS 171.454 with Engine 272.942 

MODELS 171.456 with ENGINE 272.963 

MODELS 171.473 with ENGINE 113.989 

Fig 1: Identifying Power Steering Pump Components - Shown On Engine 272.963 (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Shown on engine 272.963 

Shown on engine 272.963 

Fig 2: Identifying Power Steering Pump Components - Shown On Engine 272.963 (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Remove
	Risk of injury  to skin or eyes from hydraulic fluid spraying out under pressure. Risk of poisoning  caused by swallowing hydraulic fluid.	Depressurize the hydraulic system completely before starting any work on the system. Wear protective clothing and safety glasses.	-
	Risk of injury  caused by fingers being jammed or pinched  when removing, installing or aligning hoods, doors, trunk lid/ rear-end door or sliding roof.	When moving components, ensure that no body parts or limbs are within the operating range of moving parts.	-
1	Open engine hood		AR88.40-P-1000V
2	Remove left intake air duct (1)
3	Remove the front engine cover (2).
4	Suction off oil from expansion reservoir (3) of power steering	Before opening the hydraulic system the area surrounding the separation point should be cleaned thoroughly. Even the smallest dirt particles, introduced into the hydraulic components, can lead to malfunctions and a total failure of the hydraulic system.
		Hand pump	Figure
5	Loosen hose clamp (4) and detach hydraulic line (30f) from power steering expansion reservoir (3)	Collect escaping hydraulic oil in a suitable container and seal off line connections with plugs.
		Set of plugs	Figure
6	Detach high pressure expansion hose (30i) from the power steering pump
7	Mount connection fitting (040a) on the high pressure expansion hose (30i)	Connecting fitting	Fig 6
8	Mount connection hose (040c) to power steering pump	Connecting hose	Fig 6
9	Connect tester (039) between connecting fitting (040a) and connecting hose (040c)	Tester	Fig 3
10	Insert hydraulic line (30f) on power steering reservoir (3) and fasten with hose clamp (4)		*BA46.30-P-1004-01F
11	Fill power steering pump and bleed		AR46.30-P-0010V
	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury from bruises and burns if you hold your hand into engine when it is started or when it is running.	Secure vehicle to prevent it moving off. Wear closed and snug-fitting work clothes. Do not grasp hot or rotating parts.	-
12	Start engine	Keep engine speed at approx. 1, 000 RPM.
	Check
13	Close throttle valve (039a) on tester (039) and check maximum operating pressure	Only carry out the test briefly so that the oil temperature does not rise unacceptably.
		Pressure in power steering pump	*BE46.30-P-1001-01C
14	Turn off engine
15	Suction off oil from expansion reservoir (3) of power steering	Hand pump	Figure
16	Detach tester (039)
17	Loosen hose clamp (4) and detach hydraulic line (30f) from power steering expansion reservoir (3)	Collect escaping hydraulic oil in a suitable container and seal off line connections with plugs.
		Set of plugs	Figure
18	Detach connecting fitting (040a) and connecting hose (040c)
	Install
19	Mount high pressure stretch hose (30i) on power steering pump	Replace O-ring of high pressure expansion hose (30i).
			*BA46.30-P-1002-01F
20	Insert hydraulic line (30f) on power steering reservoir (3) and fasten with hose clamp (4)		*BA46.30-P-1004-01F
2	Fill power steering pump and bleed		AR46.30-P-0010V
22	Install front engine cover (2)
23	Install left intake air duct (1)
	Check
24	Inspect power-steering pump for leaks
25	Close engine hood		AR88.40-P-1000V

Fig 3: Identifying Tester (124 589 06 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Set Of Plugs (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Hand Pump (210 589 00 71 00)

Courtesy of MERCEDES-BENZ USA

Fig 6: Identifying Connecting Pipe (215 589 01 63 00)

Courtesy of MERCEDES-BENZ USA