M1088 aux starter solenoid

[Sweep]

I'm looking for a replacement aux starter solenoid. Is there an aftermarket one available? Perhaps an old fashion solenoid at the parts store?

 

[Suprman]

Is yours bad? Not a high failure part.

 

[Sweep]

Is yours bad? Not a high failure part.

Im having intermitmant starting issues. No thermal protector on the starter. Looking to have an aux solenoid on hand even if it's not bad. I've swapped some of the relays out. Going to change the starting related maxi cb's to fuses. It will end up staring when troubleshooting. So it's been hard to narrow it down. I have the TM's. I'm trying to start small with the trouble shooting. The truck is a 1088 my Fire Dept is building into a tanker.

 

[Suprman]

When the truck won't start, take a screwdriver and jump the 2 big terminals on the solenoid. If it still won't start, go to the starter the post closest to the block on the solenoid is the positive. Get a clip lead on there and touch the other end to 24v. Most intermittent start issues are starter, battery or connections at either or both related.

 

[Sweep]

When the truck won't start, take a screwdriver and jump the 2 big terminals on the solenoid. If it still won't start, go to the starter the post closest to the block on the solenoid is the positive. Get a clip lead on there and touch the other end to 24v. Most intermittent start issues are starter, battery or connections at either or both related.

Thanks I'll check that out. Anybody know what purpose the aux solenoid serves? Is it redundant?

 

[Suprman]

Its part of the thermal cutout design. With the thermal protection on the starter when it went into overtemp, the aux solenoid coils ground would be disrupted.

 

[Sweep]

I do not have a thermal cutout on my starter. Does this mean it's not needed?

 

[Suprman]

Its part of the trucks design. I have never seen one fail. I would leave it the way it is.

 

[wandering neurons]

Starter has a flat spot from non-use. Most of the time the starter is on a good spot to fire off, but occasionally it stops rotating on the bad spot. And when on the bad spot, no start.
The 8.3L Cummins in my RV had intermittent start issues. Pulled the starter, had a local Mennonite shop rebuild it. There was a spot in the starter where it wouldn't make contact with the brushes. The RV had only 50K miles and very few starts. But it had sat a lot and developed a bad spot. Rebuilt starter hasn't failed me (yet).
Lots of electrical stuff doesn't like to sit idle. Just my $0.02...

 

[Sweep]

Starter has a flat spot from non-use. Most of the time the starter is on a good spot to fire off, but occasionally it stops rotating on the bad spot. And when on the bad spot, no start.
The 8.3L Cummins in my RV had intermittent start issues. Pulled the starter, had a local Mennonite shop rebuild it. There was a spot in the starter where it wouldn't make contact with the brushes. The RV had only 50K miles and very few starts. But it had sat a lot and developed a bad spot. Rebuilt starter hasn't failed me (yet).
Lots of electrical stuff doesn't like to sit idle. Just my $0.02...

That's something to consider. I have not thought of that. Thank you sir.