b615rich Posted March 27, 2015 Author Share Posted March 27, 2015 The starter has a solenoid on it and I assume an integrated relay like most Delco's ..or am I wrong? When you say kicker solenoid something else or? I will try to trace the wires back. I m pretty sure the clunk comes from the solenoid on the motor but I ll check. Thought brushes may be hung up or a bad winding. Quote Link to comment Share on other sites More sharing options...
chief doug Posted March 28, 2015 Share Posted March 28, 2015 if the solenoid is cluncking take a test light and see if power is going thru to the motor . if it is the starter needs attention if not the contact washer "the flip washer" in the solenoid needs to be cleaned or flipped and the contacts cleaned. common problem, will cause a hit or miss start 1 Quote Link to comment Share on other sites More sharing options...
b615rich Posted March 28, 2015 Author Share Posted March 28, 2015 Thanks Doug. I am pretty good with electrical, but wondering. When you say going thru ? Pretty sure the motor has the negative battery cables on one side and the relay completes the circuit from the pos side of the batteries. So where can you check or did you mean on the bench. Is there a way in the truck? Warm day today (40) so I'll be poking around out there. Thought about just changing the solenoid (relay is part of the solenoid right? ). I used to rebuild starters, alternators, etc., but mostly cars. Just a little rusty (aka getting old). Thanks again. Quote Link to comment Share on other sites More sharing options...
chief doug Posted March 28, 2015 Share Posted March 28, 2015 have someone turn the key to start, power should be on the little wire, that's the exciter wire. at the same time power should go thru the solenoid to the motor, check for power on the l shaped piece going from the lower lug to the motor. that will tell you if its the starter thats bad or the solenoid. if it's not going thru, you can take the back of the solenoid off by taking the 4 bolts off cover and clean the contacts and the flip washer. it will make sense when you see it Quote Link to comment Share on other sites More sharing options...
b615rich Posted March 29, 2015 Author Share Posted March 29, 2015 Um, duh. Of course. I hadn't even looked that close, now I remember there is that strap on the outside. I'll check it out tomorrow. Thanks! Quote Link to comment Share on other sites More sharing options...
b615rich Posted March 29, 2015 Author Share Posted March 29, 2015 Yes. The switch hits the exciter terminal. Nothing is coming out to the starter. I took off all the cables, and two screws holding the cap on. It is definitely loose, but the plastic piece won't separate from the solenoid body. Again, it's pretty loose and moves around pretty good but won,t let go.. Any ideas? I hate to ask but checked on line and couldn't find anything on just the contact disc... If I was to remove the whole solenoid is it just the three screws to the motor housing or is there something holding it inside? I'd probably consider replacing the whole thing while its all apart, but would like to get her started ASAP. Thanks again. Quote Link to comment Share on other sites More sharing options...
Macktech689 Posted March 29, 2015 Share Posted March 29, 2015 The cover wont come off because of the wiring going to the windings inside the solenoid. You can replace the solenoid seperately by removing the three screws you mentioned, it slides right off. Quote Link to comment Share on other sites More sharing options...
chief doug Posted March 29, 2015 Share Posted March 29, 2015 yeah, what he said Quote Link to comment Share on other sites More sharing options...
b615rich Posted March 29, 2015 Author Share Posted March 29, 2015 Thank you both! When you said to flip the disc I thought that was right under the plastic cover, but I guess you pull it out from the back. Thanks again. And nice truck Machtech689, Mack should pay you royalties!! Quote Link to comment Share on other sites More sharing options...
b615rich Posted April 13, 2015 Author Share Posted April 13, 2015 Well, tried the three screws and although the starters not too rusty two of the screws were frozen tight. No room so I pulled the starter. Yes, it's heavy. So, first looks like the spacer between the starter and block is cracked (the ring or sleeve is separated from the three hole flange). A Cummins part I assume. To get the solenoid off I had to remove the nut holding it on the lever. It doesn't seem to pull apart (the plunger is held in the solenoid). Is there further disassembly to get to the contacts? I see a tiny snap ring on the shaft O&G the plunger. Or? Thanks again, first I have to get the OEM spacer so I've got a little time. Quote Link to comment Share on other sites More sharing options...
slingblade Posted April 21, 2015 Share Posted April 21, 2015 ive got a similar motor in my 85superliner,mines a NTC 475 twin turbo, Quote Link to comment Share on other sites More sharing options...
chief doug Posted April 21, 2015 Share Posted April 21, 2015 can you post a picture of it Quote Link to comment Share on other sites More sharing options...
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