Toro lawn tractor dies when blades engaged.

736 Views 5 Replies 3 Participants Last post by NMRawker, 9 mo ago

PEIBlue

Discussion Starter · 9 mo ago

I have a Toro LX500. New starter motor, new battery.
The mower starts great and the engine is solid.
Problem is, when I engage the blades it dies immediately.

Any ideas on how to fix? I don't know the schematics but I tried to bypass the seat switch by tying the wires. All that did was cause it to stall any time the brake was released and the blades wouldn't even try to engage.
When I leave the wires separated the mower stalls when the blades try to engage.

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laser3kw

· #2 · 9 mo ago

I attached a sample LX500 wiring diagram, it may not be the same as yours! Post your model / serial for confirmation.
look for the y/blk (yellow / black) wire off the PTO switch or the module, or w/blk (white black) wire on either the PTO switch or the relay and unhook it. If that fixes your problem , I would change the relay as it may be bad. Keep us posted (ps - re-configure you seat switch wires to previous working order)

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PEIBlue

Discussion Starter · #3 · 9 mo ago

Sorry for the late reply and thank you for your response laser3kw.
This was a mower I picked up pretty cheap. Turns out the issue is with the blades/spindles rather than an electrical issue. Having a heck of a time trying to get the deck off to fix it. The pull out spring bolts on the back of the deck feel like they are welded on.

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laser3kw

· #4 · 9 mo ago

PEIBlue said:
The pull out spring bolts on the back of the deck feel like they are welded on.

Sounds like my deck configuration. I found if I rest the deck on 2x4's and lower the deck height adjustment / cut height down to the lowest height, that takes all the tension off the mounting points.

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PEIBlue

Discussion Starter · #5 · 9 mo ago

laser3kw said:
Sounds like my deck configuration. I found if I rest the deck on 2x4's and lower the deck height adjustment / cut height down to the lowest height, that takes all the tension off the mounting points.

I will try that, thanks.

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NMRawker

· #6 · 9 mo ago

PEIBlue said:
I have a Toro LX500. New starter motor, new battery.
The mower starts great and the engine is solid.
Problem is, when I engage the blades it dies immediately.

Any ideas on how to fix? I don't know the schematics but I tried to bypass the seat switch by tying the wires. All that did was cause it to stall any time the brake was released and the blades wouldn't even try to engage.
When I leave the wires separated the mower stalls when the blades try to engage. View attachment 62769
View attachment 62768

My John Deere LX178 does this occasionally. I found that the gas in the tank was old. That seemed to help stop this from occurring. I also have shook the fuel line to ensure there isn't a potential air bubble in it.

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