Removing and installing oil pressure relief valve - AR18.10-P-5031HA

ENGINES 602.982 /983, 604.910 #0 up to 117451, 604.910 #2 up to 025224, 604.912 #0 up to 040685, 604.912 #2 up to 013119, 604.915 #0 up to 000740, 604.915 #2 up to 000044, 604.917 #0 up to 000589, 604.917 #2 up to 000039, 605, 606 / 

Fig 1: Identifying Oil Pressure Relief Valve Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Removing, installing
1	Remove oil pan (10)	Engines 604, 605 in model 202, engines 605, 606 in model 124	AR01.45-P-7500HA
		Engine 602.982 in model 210	AR01.45-P-7500HW
		Engines 605, 606 in model 210	AR01.45-P-7500C
		Engine 604 in model 210	AR01.45-P-7500D
		Engines 606.964 in model 463 and 602.983 in model 461	AR01.45-P-7500GG
2	Remove screw plug (1)	Screw plug (1) is under pressure because of spring (2). Screw plug (1) seals with tapered seat (arrow).
		Engines 604, 605, 606	*BA18.10-P-1003-01A
		Engines 602.982/983	*BA18.10-N-1003-01A
	Oil pump with pressed on oil-pump gear wheel		BT18.10-P-0001-01A
3	Remove spring (2), filler pin(3) and control plunger (4)	Inspect for signs of wear. The control plunger (4) must be capable of slight movement in the oil-pump's hole.
4	Install in the reverse order

Oil pump

Oil pump