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Author Topic: H bridge replacement on a lt40  (Read 410 times)

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Offline richard lane

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H bridge replacement on a lt40
« on: September 11, 2019, 08:38:34 AM »
Greetings. Has anyone out there replaced the motherboard on a lt40 with a new H bridge?
Thanks in advance. Richard

Offline logbyr

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Re: H bridge replacement on a lt40
« Reply #1 on: September 11, 2019, 03:03:57 PM »
Richard

I did this last summer.   Probably spent total of 3 hrs on phone with woodmizer but we got it done.    Their electrical service people are very good at speaking on novice level even though they are far above it.

Offline PAmizerman

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Re: H bridge replacement on a lt40
« Reply #2 on: September 11, 2019, 08:31:56 PM »
I did it when I upgraded to accuset 2.
It wasn't bad. Just need to take your time and follow the steps. I used masking tape and labeled everything before I started.

If you look closely all the wires should be labeled in white writing.
Woodmizer lt40 super remote 42hp Kubota diesel. Accuset II
Hydraulics everywhere
Woodmizer edger 26hp cat diesel
Traverse 6035 telehandler
Case 95xt skidloader
byrnemillwork.com
WM bms250 sharpener
WM bmt250 setter
and a lot of back breaking work!!

Offline richard lane

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Re: H bridge replacement on a lt40
« Reply #3 on: September 12, 2019, 10:23:13 AM »
Thanks for the reply PAmizerman and Logbyr..some great suggestions! One more question. Did you both do the pre-installation inspection? There are 14 connections to check before proceeding to the H-bridge replacement.
Many thanks,
Richard

Offline logbyr

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Re: H bridge replacement on a lt40
« Reply #4 on: September 12, 2019, 07:59:29 PM »
I had an issue pop up during my annual tune up with the factory service guys.  They diagnosed the h bridge issue.   They said I had 2 options
1) take it to dealer for install 
2) call indy and have them walk me through it.

I chose option 2.     There were a few things we found during install that were not quite what book said it should be so having them coach me through it was a big help.   I don't have a ton of electrical competance.  

Offline PAmizerman

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Re: H bridge replacement on a lt40
« Reply #5 on: September 12, 2019, 08:40:42 PM »
Yes I followed the pre installation inspections
Woodmizer lt40 super remote 42hp Kubota diesel. Accuset II
Hydraulics everywhere
Woodmizer edger 26hp cat diesel
Traverse 6035 telehandler
Case 95xt skidloader
byrnemillwork.com
WM bms250 sharpener
WM bmt250 setter
and a lot of back breaking work!!

Offline derhntr

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Re: H bridge replacement on a lt40
« Reply #6 on: September 12, 2019, 08:46:38 PM »
Yep had to do the inspection and cleaned up several grounds and had to remove the paint on other ground connections when I installed the new Auccset 2 
2006 Woodmizer LT40HDG28 with command control (I hate walking in sawdust)
US Army National Guard (RET) SFC


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