Hello,

I had removed the starter motor into pices, the cranking speed was very low and the battery runs out after 4 to 5 cranks, this is a 100 AMP cold cranking battery, the bottom of the armature is damaged: the wires from the armature's coil at the bottom are exposed and the coating had come off, the copper had got slightly brittle too where the coating had come off (note this is at the bottom not where the commutator is, you can see this if you look under the armature " at the bottom " ) I hope you know where I'm describing to you my question is this: Would you recommend having the armature rewraped ?, the field coil is new. My guess is this happened because there was this stupid mechanic and he had been connecting up to four batteries together! to get the car started because there was a staring problem WTF?????? obviously it was some other problem I dono may be IP timing or some fuel block or some other issue and I'm sure if that was sorted it would have started, what they do is they keep cranking and cranking with so many batteries until it finally starts sometimes.
I was not alive when this had been happening and my father just told me when I had pulled the motor out and my father is not much of a mechanic, but then the IP timing had been set and set again by me and it starts ok and no smoke unlike earlier, belting grey smoke, the problem is the cranking now, all help is appreciated oh and the solenoid is good too

Just get a starter from a wrecking yard and pull it's armature if you do not want to recondition that starter . You know have the commutator trued,new bearings if any appreciable slop and good brushes.

Much cheaper than any attempt to rewind the armature I would imagine.If the wrecker wants too much just look up one of the california firms selling good rebuilt starters fairly cheap as a price levering device with the wrecker.A lot of the time the have no clue on prices.

Now, when you describe 4 or 5 cranks, we need to know the duration of each crank. It is not recommended to crank the starter more than 35-45 seconds at a time, with 4-5 minutes between cranks, so that the starter does not overheat. From what you describe regarding the mechanic using 4 batteries, it looks like they may have overheated the starter to the point of breaking down the insulation, and causing the the copper wires to become brittle. If that is the case, I would recommend having the armature checked at a competent re builder to see if it can be salvaged. If not, you may have to replace it with a new or rebuilt one. Good luck

__________________
96 E300d

I have spoken with the Poster before and I believe he said he was in Shirlanka. Do not know if they have Junk Yards like here to pull from.

__________________
84 300D, 82 Volvo 244Gl Diesel

Hello,
nope no junk yard here but they are a few places that recondition them I think we have to keep looking for a place, thanks for posting

HI,

Well me and my dad dont crank over say 10 seconds the most, usually its just 6 second each crank but I am not sure for how long the mechanic had cranked it had to be for a long time I understand he was very persistent with it though, some people are just retarded.

Thanks for posting

Sounds like the armature was dragging against the field coil shoes. This usually is caused by worn bushings allowing the armature to contact the shoes when cranking power is applied which causes a magnetic attraction of the armature to the field coils. The clearances are pretty tight and worn bushings will allow the armature to run off center. Be sure to install new bushings or it'll happen again.

__________________
82 300SD 202K
82 300SD 233K
83 300TD 340K
82 300TD 98k euro (parts on the hoof)
85 300TD 282K
83 300TD 197K

Well the mechanic tells my dad the armature is perfect I think that's bull but my dad seems to believe him and not me and my dad wants to put it back the way it was (makes no sense) these mechanics in srilanka suck

Thanks for the posts
Jeremy Brett

Connecting several batteries together ( in parallel, I assume) will supply more current to the starting system. This would overcome high resistance in the circuit, causing the starter to turn normally. I think you might have faulty battery/starter cables or loose or dirty connections.

Also, have you load-tested the battery you are currently using to determine it is OK?

If you are concerned about the coating loss on the armature windings, you can use some insulating lacquer on them, it comes in a small bottle with a brush.

Hmm

do you think having a new coil in the armature will make the crank more dynamic and do you think over time the conductivity or the magnetism of the metal reduces ? that made a light go on

You're stretching,there.

New Brushes,Bushings and Bearings and the thing'll be as new.

__________________
'84 300SD sold
124.128