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Author Topic: LT40 Hydraulic Microswitch  (Read 406 times)

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Offline Sixacresand

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LT40 Hydraulic Microswitch
« on: January 17, 2019, 07:57:50 PM »
Just like that, the hydraulic pump would not run.  I checked everything I could do without tools.  Removed the cover from the hydraulic cavity, hot wired the sylenoid with screwdriver and the pump came to life.   Stripped a little insulation from both microswitch leads, touched and the pump fired up.  Next step, called WM and ordered a new one.  The WM tech suggested I mount a external toggle switch to activate the pump so I could run while waiting on the part.  And I did and got to finish the day.   

I did a forum search on this switch problem and found good information and tips from a thread started 8 or 9 years ago.  Good deal.  

Offline terrifictimbersllc

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Re: LT40 Hydraulic Microswitch
« Reply #1 on: January 17, 2019, 08:08:46 PM »
I dont like changing that switch.
DJ Hoover, Terrific Timbers LLC,  Mystic CT Woodmizer Million Board Foot Club member. 2019 LT70 Super Wide,  Logrite fetching arch, WM BMS250 sharpener/BMT250 setter.  2001 F350 7.3L PSD 6 spd manual ZF 4x4 Crew Cab Long Bed

Offline Chuck White

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Re: LT40 Hydraulic Microswitch
« Reply #2 on: January 17, 2019, 09:02:28 PM »
That microswitch is very sensitive and has a really small area of operation!

Lot of fussing to get it right, just be patient and you'll get it set right!
~Chuck~
Retired USAF 1989, Retired School Bus Driver 2012, now semi-retired Mobile Sawyer
1995 Wood-Mizer LT40HDG25 Kohler - Shingle & LapSider, Cooks Cat Claw Sharpener and single-tooth setter, 4-foot Logrite cant hook.
Basic mechanical skills are all that's required to maintain a Wood-Mizer

Offline Dave Shepard

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Re: LT40 Hydraulic Microswitch
« Reply #3 on: January 17, 2019, 09:32:28 PM »
I have a toggle switch in the front of thre hydraulics box, I think where the switch for the live deck goes. I unhooked it when I put the new micro switch in, but it wouldn't take more than a couple minutes to hook it back up. It could easily be left in for an emergency. Yes, the micro switch is a bit fiddly for big hands to install. I think I took the valve bank off completely. A mechanic friend once told me if something is in your way, take it off and toss it on the bench, air conditioning lines excluded, of course.  :D
Wood-Mizer LT40HDD51-WR Wireless, Kubota L48, Honda Rincon 650, TJ208 G-S, and a 60"Logrite!

Offline woodworker9

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Re: LT40 Hydraulic Microswitch
« Reply #4 on: January 18, 2019, 12:27:13 AM »
Changed mine, along with the solenoid, 2 weeks ago.  PITA.
03' LT40HD25 Kohler hydraulic w/ accuset
MS 441, MS 290, New Holland L185

Offline Sixacresand

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Re: LT40 Hydraulic Microswitch
« Reply #5 on: January 18, 2019, 07:24:45 AM »
One tip I read on the forum was to put the bolt nuts on the switch side, which I think I will do.  

Dave Shepard,  I think I will also leave the backup switch mounted.    

I know this is a minor problem for most of you, but thanks to everyone for your input.  

BTW, the part will probably be delivered today


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