Return to the Tractors Forum
| Post a Follow-Up
John Deere LX176 PTO problem
| | |
Posted by
tommyp z5ohio (
My Page) on
Sat, Apr 24, 10 at 16:54
The mower keeps cutting off but if I turn the PTO switch on and off it will go back on for a short time and go off again. I disconnected the wires from the switch to the clutch and applied power to the clutch direct from the battery. I can hear the clutch engage. I cannot get an ohm reading from the clutch. It appears to have no resistance. I turn on the key and turn on the PTO switch with the mower off and some one in the seat and I can get 12 volts coming out of the switch. When I connect the meter to the wires coming out of the switch with the key off and the switch on I can not get continuity thru the switch.
I am confused and I don't want to buy a clutch if it is only the switch. Is there a better way to check the switch in the mower because it would take some doing to get it out.
Thanks |
Follow-Up Postings:
RE: John Deere LX176 PTO problem
| | |
| If the clutch engages when you apply 12 v directly to it,sounds like it is working ok. Maybe the resistance of the clutch is higher than the scale on your meter and you should try it on a higher scale. If the clutch engages,it has to have a resistance. May be one of the other interlocks. Am sure others on the board can help you a lot more. |
RE: John Deere LX176 PTO problem
| | |
| What do you mean by "cannot get an ohm reading from the clutch"? I'm guessing the clutch should draw 2 or 3 amps which suggests the resistance reading should be somewhere around 5 ohms (Ohm's law). Are you saying there is no resistance? |
RE: John Deere LX176 PTO problem
| | |
| With the tractor switch off I connect the ohm meter to the wires from the clutch and it reads 0.00 This is the same reading I get when the meter is turned on and the probes are touched together / no resistance. |
RE: John Deere LX176 PTO problem
| | |
| Try reversing the leads of the meter to see if it shows "no resistance" no matter which way the leads are connected. Some of these PTO clutches feature a diode in the clutch wiring. The diode (if present) is to shunt high voltage "spikes" to ground. If a diode is part of the clutch, and the clutch is GOOD, you will read "no resistance" connecting the meter leads in one configuration, and when you switch the leads (polarity reversal), you will read the true Ohms value of the clutch coil windings. The Ohms value seen should be near the range of 2.4 Ohm and 2.9 Ohm. Anything much greater than 2.9 implies poor continuity through the windings. Anything much less than 2.4 implies "a short" to ground. If a diode is featured in the clutch, and the diode "shorts out", it will give the same Ohm reading (no resistance) as a shorted coil winding. Are you disconnecting the clutch wires from the chassis harness to access the terminals of the connector? Simply slipping the meter probes into the connector while it is still plugged to the chassis side harness will give a false reading. |
RE: John Deere LX176 PTO problem
| | |
| When I engage the pto on my John Deere nothing happens. I can hook jumper cables off my jeep up to it and the pto will work but as soon as I take one of the cables off the pto quits working. |
Post a Follow-Up
Please Note: Only registered members are able to post messages to this forum. If you are a member, please log in.
If you aren't yet a member, join now!
Return to the Tractors Forum
Instructions
- You must be a registered member and logged in to post messages on our forums.
- Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review the contents and make changes.
- After posting your message, you may need to refresh the forum page in order to see it.
- It is illegal to post copyrighted material without the owner's consent.
- HTML codes are allowed in the message field only.
- No advertising is allowed in any of the forums.
- If you would like to practice posting or uploading photos, please visit our Test forum.
- If you need assistance, please Contact Us and we will be happy to help.
