Starter Problems??? - PeachParts Mercedes-Benz Forum

leathermang · #1 07-02-2006, 09:26 AM

I don't know of any parts houses these days that won't do a free proper test of a starter or alternator or generator....

Bens lover · #2 07-02-2006, 11:45 PM

Ok guy's this is the result of my bench test.
I connected a cable from the small screw on the selenoid and put the other end on the positive of the battery,the other cable was a ground.What happend was the small wheel with teeth on them in the starter came out and went back in when i would remove the cable...Is this what is suppose to happen?I was expecting the stater to kick more then that...Someone help me here im only a novice at this.
regards
Dan

1985 300SD Sady · #3 07-02-2006, 11:55 PM

Quote:

Originally Posted by Bens lover

Ok guy's this is the result of my bench test.
I connected a cable from the small screw on the selenoid and put the other end on the positive of the battery,the other cable was a ground.What happend was the small wheel with teeth on them in the starter came out and went back in when i would remove the cable...Is this what is suppose to happen?I was expecting the stater to kick more then that...Someone help me here im only a novice at this.
regards
Dan

that is what is supposed to happen for what you did, although all you did was tested the solenoid. This means you know now that the solenoid is good.

Now you need to test the actual starter motor... to do this you need some heavy cable to go from the back of solenoid (large screw terminals) and still the smaller wire to trip the solenoid and test the starter.

Bens lover · #4 07-03-2006, 12:08 AM

Kool
give me a few moments and Ill be right back with the results!

Bens lover · #5 07-03-2006, 12:15 AM

Ok
I did exactly what you said and the starter motor engaged and was spinning very fast.So i guess now my problems is somewhere else...What about the nutral switch? Could this be the problem and if so where is it located?

1985 300SD Sady · #6 07-03-2006, 10:11 AM

Quote:

Originally Posted by Bens lover

Ok
I did exactly what you said and the starter motor engaged and was spinning very fast.So i guess now my problems is somewhere else...What about the nutral switch? Could this be the problem and if so where is it located?

well, you have got to make sure all your connections are clean when you put the starter back on.

Your right... if your not hearing clicking or anything the NSS could be the culprit.

I agree with motorhead about the wiring may be so old that it can not flow enough amperage to operate the solenoid.

Put the starter back on and report back.

Endust · #7 07-03-2006, 10:29 AM

Im not 100% sure this applies to the MB starter as I have never taken one apart. However, often times the current is applied to the starter motor itself as a result of the solenoid coming forward. There are heavy contacts in the back of the solenoid that close then the solenoid goes out. It sounds to be line the solenoid is working ok, and the motor is working ok, but those contacts in the back of the solenoid are broken. You'll know for sure when you reinstall it I guess, but i bet thats whats busted. I have seen it happen many times on 6.2 diesels.