500SEL (126.037) V8-5.0L (117.963) (1984)
3
Remove shutoff piston (21) together with compression spring (24), spring plate (25) and ball (26) from pump housing (20).
Installation Note
Check 0-ring (29) and teflon rings shutoff piston (30) and (31) for damage and replace, if necessary. Place 0-ring (29) into pump housing. Insert teflon
rings (30) and (31) into shutoff piston (21).