Well, the starter turns anyway. It doesn't sound like it is engaging the flywheel. Would there be a distinct "engagement" sound or feel? Steve Vogt
- posted
16 years ago
Well, the starter turns anyway. It doesn't sound like it is engaging the flywheel. Would there be a distinct "engagement" sound or feel? Steve Vogt
jumping it off a battery charger for instance MIGHT NOT get it enough speed to throw the bendix out to engagte, ONCE engaged, the current draw flies thru the roof.
it COULD have a stuck bendix too.
--Shiva--
Sounds like a stuck Bendix. If you can spin the starter motor it should be enough to engage the bendix. It could be broken but is probably just stuck. Pull the starter and clean it up and it will work fine. I never know which way to go with these. If you lube them well they collect debris and stick. If you don't lube them they collect rust and stick. The good news is it is not much of a problem to pull the starter every couple years and clean it.
Dumb question... is the starter spinning in the correct direction? You mention positive ground. If the starter is from a later negative ground application, wouldn't it spin backwards? If you have the starter out, try hooking it up to a battery both ways, see if the bendix throws with positive on ground, or negative on ground.
The starter will spin in the same direction regardless of polarity.
JT
Jim Bradley wrote:
That's interesting. Most DC motors change the direction of rotation by changing polarity. Anyone know what the difference is in the design of the starter that would cause it to rotate in the same direction regardless of polarity?
Jim Bradley
'64 Dayt> The starter will spin in the same direction regardless of polarity. > > JT
shhhh, it's very stupid so don't tell it that it is supposed to reverse rotate. did you know alternators charge in either direction? you can actually mount one mirror imaged to a crankshaft if needed be (remember charging rates depend on rpm's).
Permanent magnet DC motors will reverse with a polarity change because the direction of the field generated in the rotor reverses with respect to the field generated by the magnets. Normal shunt and series wound motors will not reverse because both fields reverse at the same time. You have to cross wire the field or the armature to reverse one of these. Most modern small motors are permanent magnet, but the older ones like those in Studebakers are not.
It has to do with whether the motor uses permanent magnets or a field winding. The starter uses a field winding, so the magnetic field that the stator goes through also changes direction with polarity.
Joel
Jim Bradley wrote:
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