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George, Even if an electrical solenoid is getting energy and pulling in (you said it moves, so I assume its getting power when you press start), it can still be bad, however, due to carbon build up or other problems which can cause the starter to not receive sufficient current to operate, even if a voltmeter reads the correct voltage present. If you have a 12 volt electric start gas tractor, that solenoid can be easily checked by by-passing around it with jumper or battery cables, thereby applying 12 volts battery voltage direct to the starter to see if she then cranks. CAUTION you have to make good quick heavy solid contact when you try and jumper cable around a solenoid or direct to the starters input to avoid arcing, heat and carbon. However, if this is a 24 volt electric start diesel, those large heavy solenoids and connections arent quite as simple and safe and easy to test. When you say it moves??? that sounds like you may indeed be talkign about a large 24 volt heavy solenoid and not the small light ones used on 12 volt gas tractors??? Often when one suspects a starter is bad and if the solenoid is good and by passing it still doesnt crank her over, there can still be a bad or loose or carboned up battery cable or terminal or ground connection somewhere assuming the battery(s) are in top shape. A loose or weak or carboned up terminal or connection or ground can yield the same result (non cranking) as a bad starter, so check and tighten and clean ALL battery terminal and ground connections and cable ends first. Also, if it a 24 volt system, even if only one of the (2 or 4 ?) batterys is bad, it can cause poor or no starter performance. So, be sure all connections and cable ends and terminals and grounds are clean and tight and all batterys are charged and the starter is well grounded (if a 12 volt) and by pass (if a 12 volt) the solenoid before finally suspecting a bad starter. A starter shop can check it out for you and they often just need a new set of brushes and a good cleanign up and servicing the commutator to get them going. PS I was thinking by 730ES its a 24 volt electric start diesel is that right??? If so, all the battery and connections and grounds and cable tips above hold true, but I dont like to try any by pass test on those solenloids like on the light simple 12 volt single terminal ones, and you might take the starter and solenoid to a shop for a laod test if all other tips fail. Also be sure the solenoid is getting sufficient power even if its a 24 volt system, but since you say it moves, I suspect it is. Good Luck n God Bless the USA Please pray for our troops. Ol John T Nordhoff in Indiana
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