GT52XLSi PTO won't engage - Lawn Mower Forums : Lawnmower Reviews, Repair, Pricing and Discussion Forum
 
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post #1 of 9 (permalink) Old 05-21-2020, 03:05 PM Thread Starter
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GT52XLSi PTO won't engage

PTO won't engage on a 5 year old gt52xlsi with 95 hours. the clutch shows 3.3 ohms. good continuity on and off at the switch itself, changing active terminals as expected. when i start the mower with the switch off, sometimes the PTO warning light comes on immediately, other times it only comes on once i pull the switch to try to engage the PTO. in either case it then stays on even when the switch is then turned off... all of which makes me wonder about the seat switch.

i don't really know how to trouble shoot the seat switch, and those are the only components i can point to as possible problems. i had noticed that over time the PTO engagement became more and more labored and hesitant, like it really wasn't happy about spinning up but then would run well enough. it also gave me a final warning when it failed to engage one day, then worked again, then stopped altogether.

hopefully it's something embarrassingly simple....

for those not familiar with the XLSi, the attached photo shows you what the "i" means. the ignition is an electronic keypad switch rather than a key.
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post #2 of 9 (permalink) Old 05-22-2020, 01:40 AM
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This might be something to look into:


https://ogura-clutch.com/air-gap-adjustment.php

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post #3 of 9 (permalink) Old 05-22-2020, 07:56 AM Thread Starter
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thanks, i'll try that. i assumed the resistance being in spec reflected a proper gap, but i'll try adjusting it and see if that makes a difference.
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post #4 of 9 (permalink) Old 05-22-2020, 10:44 AM
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The resistance only indicates whether the coil has a shorted winding or if it has opened up completely. I suppose another possibility if the gap is okay would be the coil is not getting full voltage supplied to it. That could be caused by anything from a bad ground to the pto switch itself again being suspect.


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post #5 of 9 (permalink) Old 05-23-2020, 07:19 AM
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Welcome from Gettysburg address

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post #6 of 9 (permalink) Old 05-24-2020, 02:54 PM Thread Starter
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thanks!

fyi, i haven't wandered off, i just got stuck. i can't find my impact driver and haven't figured out how to remove the clutch without it.
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post #7 of 9 (permalink) Old 05-25-2020, 01:32 PM Thread Starter
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looks like i have what Ogura refers to as a one-piece design - no adjustment required. or possible.
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post #8 of 9 (permalink) Old 05-25-2020, 01:42 PM Thread Starter
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apparently the only next step on the clutch is to put power to it and see if it clicks.
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post #9 of 9 (permalink) Old 05-25-2020, 02:17 PM Thread Starter
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doesn't appear to be the clutch. bench test shows a nice, big "click" activation.

swapped out a new aftermarket PTO switch, so it doesn't appear to be that either.

i don't know how to test the seat switch. it seems to work as far as recognizing whether i'm sitting on it or not for the purpose of starting the mower, but i don't know how to test for its emergency PTO kill function - which seems like a possible culprit given the fact that it's showing me the blinking PTO light as soon as i start the engine, regardless of the position of the main PTO switch.

other possibilities:

a short somewhere in the wiring to either the seat or the clutch

something in the central XLS*i* switch panel, shown in the first post above.

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