Farm Pro 2420 starting issue

[parksfamilyranch]

 

[parksfamilyranch]

This was shared on another forum so I am going to try it out.

"watching your video shows the solenoid is working ok, the bendix drive is extending and the armature is spinning as it should, now there is one more test you can do before you spend your money on a new starter and that is to lock the starter in a good vice and hook up the power cables and spin the starter, -- and with a piece of hardwood about 2x2 size, load up the bendix drive teeth with the wood, there is a one way clutch in the bendix that allows the armature to not over spin when the engine fires up, by loading the bendix, this tests the one way clutch to see if the clutch is holding, after time, they do slip.

If the bendix clutch is slipping, then the bendix can be replaced instead of the whole starter motor."

 

[parksfamilyranch]

While you have it off, Take the end off of the starter(opposite the gear end) and clean the carbon out of the brushes and off of the commutator where the brushes transfer current to the rotor. Shorted/messed up brushes, and or a weak connection to the starter could also cause stuttering/chattering. Voltage is good, you turn key to start, solenoid tries to engage, short or bad connection causes voltage drop, solenoid disengages, voltge surges, solenoid re-engages, repeat...

I will try that too thank you for the idea

 

[parksfamilyranch]

So I took it apart as advised cleaned every connection I could find, used a dang dremel wire wheel and shined all connections up. And here is new starter test.

Haven't tried testing with block of wood yet

 

[parksfamilyranch]

So before i forgot i wanted to share a few videos so future people can look and maybe it'll help them out with the starter. Take them with a grain of salt, tractor is in the field and I don't have a pretty shop lol.

Video 1 of 5

 

[parksfamilyranch]

Video 2 of 5

 

[parksfamilyranch]

Video 3 of 5

 

[parksfamilyranch]

Video 4 of 5

 

[parksfamilyranch]

Video 5 of 5

 

[jacques54]

On the video of the starter free spinning, the bendix clutch should extend all the way out and almost contact the end collar. You have an issue there, bad solenoid, bend or reversed fork solenoid.
To make this try spin, jump the small connection to the big nut where the battery cable go. This make the solenoid extend. If it is what you are already do, you are ok.
The starter motor itself sound good.