M1009 won't start

[mightybaldone]

My 86 M1009 has died twice on me now. Turn the key, glow plugs warm up, turn to start, starter relay clicks, but no starter.

Batteries are good, tested at auto shop, 900 CCA each,

Voltage at the starter when key in start. Still 24 volt starter.

Engine ground cleaned, even ran jumper from front neg post to starter case.

Installed new starter and truck started.

Month later same thing. Pulled starter, tested fine, reinstalled and truck started.

Ohmed purple wire from starter to starter relay and wire is good.

Ideas please. Been stranded twice now,

 

[dependable]

Check wire by starter heat shield for worn insulation. Arcing can cause this and premature solenoid failure. Look at top of forum at Doghead starter relay sticky, if has not been done, do that.

If you have one of the cheep import starters, you might want to carry an extra one (and tools) or at least a replacement solenoid.

 

[mightybaldone]

Doghead mod had already been done. Wire is in good shape. Both the original starter and the new starter still work. After I replaced the starter the truck would start. Pulled a M151 about 278 miles and it would start for about 3 weeks no problem. Then no start. Pull the starter and put it right back in and truck starts. Flywheel teeth show no signs of damage.

 

[AECS]

Do you have the right braket on the starter? Shims needed? It sounds like the starter if twisting a bit and jamming up. When you remove it and re-install, it is aligning back up for a little bit.

 

[irishvin]

Do you have the right braket on the starter? Shims needed? It sounds like the starter if twisting a bit and jamming up. When you remove it and re-install, it is aligning back up for a little bit.

Exactly what happened with mine power every were but nothing check the starter for the bracket give it 90% Thats the problem

 

[mightybaldone]

My starter has the heat shield and starter bracket missing. Anyone have an idea where I might find them. I guess I'll carry around a rubber hammer if I get broke down again. Thanks for the responses.

 

[AECS]

Direct deive or gear reduction? Gear rduction st a GM dealer and direct drive at a wrecking yard or ebay...

 

[cpf240]

I would suggest Hillbillywizard here on SS for those parts...

 

[mightybaldone]

Thanks I will PM him.

 

[sierrajcharlie]

Try turning the motor over by hand with a bar and a 15/16" socket. Mine will do the same thing once in awhile but I've got the bracket in place. I don't know why it does it, only that it does it at the worst possible time. Maybe that will get you going for now.

 

[Howlin Mad Murdock]

Don't know if this will help, but, you said the starter relay is clicking, is the starter solenoid clicking as well? This may be a useless tidbit but information none the less.

 

[mightybaldone]

Yes the solenoid clicks to. Have a bracket ordered and see what happens but will carry a bar and socket and a hammer with me till I know it's fixed. Thank goodness for the free towing on the insurance. Thanks all for your help.

 

[tgtaylor64]

Same exact thing with a friends M1008. Test the lead on the starter relay under the dash (i.e., the Doghead mod). Mine was clicking but for whatever reason, not sending the 24V to the relay on the starter. The red wire will have 24V all the time (be careful)! The other fat wire (purple) will only have 24V when the key is in the start position. If not, replace the Doghead relay with a new one and fire that puppy off!