JD 450C no crank
Re: JD 450C no crank
This is assuming you have checked the battery voltage and condition. The solenoid may be bad internally. Make sure your machine is in neutral and try using a jumper wire between the battery terminal of the solenoid and the start wire terminal. If that makes it crank it can be an indication of too little current getting through the ignition switch and wire to the solenoid. A possible fix for that is to add a remote solenoid or a relay activated by the switch but getting power for the solenoid start terminal from the battery post on the solenoid. That has been don on many applications. If it does not crank with the jumper wire use a booster cable or some other heavy conductor to jump between the large posts of the solenoid. The starter likely won't engage but it should spin right up. If it spins up it is likely a solenoid problem. If it doesn't spin the starter is either locked in the ring gear or more likely has an internal problem.
Re: JD 450C no crank
I was jumping it between the battery terminal of the solenoid and the start wire terminal and the solenoid would just click and no starter crank at all.
i will drag some heavy jumper cables out to the dozer and try jumping the solenoid posts.
i will drag some heavy jumper cables out to the dozer and try jumping the solenoid posts.
Re: JD 450C no crank
Tried jumping the two large solenoid terminals and turning the key but got nothing from the starter so I am guessing that the starter will have to come out
Would dropping the belly pan give any more access to the starter bolts?
Would dropping the belly pan give any more access to the starter bolts?
Re: JD 450C no crank
I don't think the effort of getting the belly pan off and back on will be a gain in the end, they are no fun to wrestle with.
Re: JD 450C no crank
I was not looking forward to dropping it. Thanks for the heads up.
Re: JD 450C no crank
For safety reasons this is an excellent time to clean the belly pans. When was the last time they were cleaned?. Anyone ever seen a dozer/loader belly pan fire?
Re: JD 450C no crank
Did some more troubleshooting and decided I need to pull the starter.
I have 2 spare starters so will be going in as soon as weather permits.
Finally getting some rain here after all the very hot dry days we have had all sunmmer.
I have 2 spare starters so will be going in as soon as weather permits.
Finally getting some rain here after all the very hot dry days we have had all sunmmer.
Re: JD 450C no crank
Woohoo starter is out, was not as hard as I imagined.
Raising the blade and removing the fuel filter give more room to see and swing a wrench.
Not enough room to get a socket on the lower bolt and only small amount of room to use socket [at an angle ] on the top nut.
Bench tested both spare starters and one works so that is going in
Raising the blade and removing the fuel filter give more room to see and swing a wrench.
Not enough room to get a socket on the lower bolt and only small amount of room to use socket [at an angle ] on the top nut.
Bench tested both spare starters and one works so that is going in
Re: JD 450C no crank
Starter is back in but I celebrated too soon.
There was no response from the solenoid or the starter when powered up.
I did not have my DMM with me so I could not check for voltage but will return when this rain shower passes.
Unfortunately, my electrical knowledge leave much to be desired.
There was no response from the solenoid or the starter when powered up.
I did not have my DMM with me so I could not check for voltage but will return when this rain shower passes.
Unfortunately, my electrical knowledge leave much to be desired.
Re: JD 450C no crank
Try bypassing the master switch. I have seen them go bad. Hook all the wires to one terminal on the master switch and try it.
Re: JD 450C no crank
First thing I did was bypass the master, no change at all
Re: JD 450C no crank
Good the master switch has been eliminated as the problem. When you get your meter on it watch the battery voltage at the solenoid when trying to crank the starter
Re: JD 450C no crank
Got the meter out and check voltages and weirdly, the start circuit reads 12.5 volts without having to push the start button!
What would that indicate? Like I said earlier, I am electrically ignorant.
What would that indicate? Like I said earlier, I am electrically ignorant.
Re: JD 450C no crank
Are you saying the small wire on the solenoid, coming from the ignition switch/ safety switch, has 12.5 volts on it all the time? That would indicate a bad ignition/start switch, but the starter should be turning if that is the case.
Re: JD 450C no crank
Maybe I have hooked something up wrong. I will check it in the morning, something is not right.
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