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Low/Dead Battery affect PTO operation?

22K views 7 replies 7 participants last post by  craigps 
#1 ·
Does a low/dead battery affect the front PTO operation? For some reason, I had to jumpstart my GT20 for the first time. I mowed for an hour and a half or so, and all of a sudden the PTO shut off. Working the switch didn't make any difference, I couldn't get it going again. I just set the air gaps a short time ago. I can hear the click when I pull the switch. I'm not familiar with an electric clutch, but does it need power from the battery to work the magnets or whatever kicks the PTO in?
 
#2 ·
I needs a certain amount of voltage to work if you have a voltmeter you can check it and see hat it is. or just put the jumpers on it and see if it works.
 
#3 ·
I'm not familiar with an electric clutch, but does it need power from the battery to work the magnets or whatever kicks the PTO in?
An electromagnet needs sufficient current to operate, yes.

Small machines don't put out a lot of current from the charging systems. If the battery is low, the system can't keep up with the demand of charging the battery and keeping the magnet energized.

I had almost the exact same situation this past week with my PYT9000. After putting it on a battery charger overnight, it worked fine the next day.
 
#5 ·
How you coming with this?
The charging system is quite capable of supplying pto voltage. My GT20 charges at idle 13.7 volts and regulated at 20 amp. The PTO uses less than 4 amp when working properly.
I can also mow for a few hours on a fully charged battery if needed. So dont see activating the pto a problem with the tractor shut off and good battery.
Before attacking the pto clutch make sure everything is working properly in the PTO circuit.
Selector and seat switches activating.
Battery volage at red wire on time delay.
PTO light on at console illuminates switches being bad.
I was having problems with mine Saturday. Replacing the PTO relay that would not stay activated solved the problem.
 
#6 ·
After 1-1/2 hours of mowing, your battery should have been well charged.
If the engine won't crank, your charging system isn't charging.
You probably still had enough capacity to run the PRO/relays etc. for 1-1/2 hrs.before the voltage dropped too low to keep the PTO engaged.
 
#8 ·
Same here... I had a bad battery on my JD Hydro 165. Failed to take a charge, but I was able to jump start it from my car. Probelm solved? No. I soon discovered that the mowing unit would not turn on. Cleaning the contacts did not help. Upon reading the above thread, I decided to install a new battery and see if that solved BOTH issues. YES! It now starts right up and the mowing unit turns on when the switch is flipped. Thanks for all the suggestions. This forum has helped me several times.
 
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