BenzWorld Senior Member
Date registered: Jun 2004
Mentioned: 0 Post(s)
Quoted: 17 Post(s)
RE: '62 190D Fuel injector Lubrication question!!!
I think what you are referring to is the red breather cap at the top rear of the injection pump, not injectors (which are screwed into the cylinder head). This is also the fill plug for pump oil. On the side of the pump, opposite the engine, toward the bottom and rear is a check plug. I believe it takes a 15mm socket. You fill the pump with engine oil through the breather hole until it runs out of the check plug. Some diesel may run out, but filling with oil will purge it. Then install the check plug and breather cap. The pump is not filled any further than the level of the check plug. This oil level should be checked regularly as fuel can seep into the pump and must be drained so only oil is present.