I replaced the starter solenoid on my Case 300. It has 3 posts (1 for battery cable, 1 for starter cable, and 1 for ignition switch cable.) I get an arc when I try to hook up the cables at the battery. It still arcs with the switch cable disconnected from the solenoid. The posts on the solenoid are not grounded to the body of the solenoid. However, with the ohm meter I get a circuit from battery cable post to starter cable post on the solenoid. This would mean that power would run through the solenoid to starter with the ignition off. Is this correct or do I have a bad solenoid?
- Thread starter C.Amick
- Start date
old
Well-known Member
- Location
- Camdenton Missouri
bad or stuck closed
i agree with the terminals turning in relation to the body. I had that happen to a switch on a 2 cyl JD. The switch was brand new and once the terminal had 'turned' it would not release the short-to-body regardless of the terminal position. The new switch had come from vendor 'S'.
Low voltage from the battery will ruin a solenoid contact ring in short order, the innards are toast in about 6 starting attempts and then it's all downhill. ( low voltage = high amperage). Any loose connections will cause this also. It's known that there some lousy, cheap and inferior solenoids coming from other than the USA. The electro-magnet part of the device hardly ever goes bad. It's the contact ring inside the connection end which is ruined. New high quality solenoid and solid & clean connections and you should be good to go.
A buddy of mine will disassemble a solenoid and clean/buff/polish any carbon or pitting on the contacts, rotate them for a new point of contact, reassemble them and they are good to go .......Indeed a weak battery or bad cable or grounds and low voltage can cause starter relay contacts to stick n burn n carbon up and weld together, been there done that when the starter keeps grinding away and you have to remove a (often HOT be careful) battery cable grrrrrrrrrrr
Nice chatting with you best wishes
John T
Nice chatting with you best wishes
John T
Determined
Well-known Member
I would agree it does sound like your problem is with the solenoid.
Is it possible that you hooked it all up originally and attempted to start it with a low battery.
The high amp draw can cause the contacts to arc and weld together inside the solenoid.
Sometimes lightly tapping it is enough to release the contacts from each other.
If this is the case them you will weld solenoids together all day long until you correct the low battery issue.
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