Remove/install power steering pump - AR46.30-P-0500MMI

MODEL 172 with ENGINE 152 

Fig 1: Identifying Power Steering Pump Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury  to skin or eyes caused by hydraulic fluid spraying out under high pressure. Risk of poisoning  caused by swallowing hydraulic fluid	Depressurize hydraulic system completely before starting any work on system. Wear protective clothing and safety glasses.	AS00.00-Z-0013-01A
1	Remove poly-V belt		AR13.20-P-0001MMI
2	Suction off oil from expansion reservoir (1) of power steering	The area surrounding the separation point should be cleaned thoroughly before opening the hydraulic system. Even the smallest dirt particles, introduced into the hydraulic components, can lead to malfunctions and a total failure of the hydraulic system.
			Figure
3	Detach return line (2) at power steering expansion reservoir (1)	Collect escaping oil with a rag and plug line connections.
			Figure
4	Unscrew bolt (3) and pull pressure line (4) out of power steering pump (5)	Collect escaping oil with a rag and plug line connections.
		Replace sealing ring.	Figure
			*BA46.30-P-1004-01R
5	Disconnect electrical connector (6) from power steering pump quantity control valve
6	Detach vacuum line (7) at intake manifold
7	Remove bolt (8) securing coolant line to power steering pump (5)
8	Remove bolts (9) from power steering expansion reservoir (1)		*BA46.30-P-1003-01R
9	Remove bolts (10) of power steering pump (5)		*BA46.30-P-1020-01R
			*BA46.30-P-1021-01R
10	Remove power steering pump (5) with power steering expansion reservoir (1) from timing case cover and take out of engine compartment
11	Undo hose clamp and remove power steering expansion reservoir (1) from power steering pump (5)	If necessary
12	Install in the reverse order
13	Fill and bleed power steering pump (5).		AR46.30-P-0010V
14	Power steering - checking and correcting oil level		AP46.00-P-4611V

POWER STEERING PUMP

Number	Designation			Model 172 with engine 152
BA46.30-P-1003-01R	Expansion reservoir bolt		Nm	9
BA46.30-P-1004-01R	Attachment, high pressure expansion hose of rack-and-pinion steering to power steering pump or tandem pump	Union nut	Nm	-
		Banjo bolt	Nm	-
		Bolt M8	Nm	18
BA46.30-P-1020-01R	Bolt, power steering pump to water pump		Nm	20
BA46.30-P-1021-01R	Bolt, bracket for power steering pump to lower bracket		Nm	20

Fig 2: Identifying Set Of Stop Plugs (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Hand Pump (210 589 00 71 00)

Courtesy of MERCEDES-BENZ USA