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LT35HD Hydraulic Electrical Connection

Started by Rhodemont, August 06, 2018, 11:25:53 AM

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Rhodemont

This weekend my hydraulics did not always make electrical connection when I returned the head to home to use them.  Many times I had to jog forward or back a couple inches and they would start working.  Wiped of the copper bus bar which looks tarnished but no dust or crude on it. This seemed to help some but still needed to jog some times after that. Do I need to go in and clean up the contact in the carriage and how do you do that? Should I be doing some PM regularly that I am missing? 
Woodmizer LT35HD    JD4720 with Norse350 winch
Stihl 362, 039, Echo CS-2511T and now a CS-361P

Chuck White

I don't know all that much about the LT35, my mill is an LT40!

On my mill there is a spring-loaded ground contact that rides along on the bottom rail, maybe it needs to be cleaned up a little!  That spring-loaded contact is only for the hydraulics!

It could just have a little sawdust in there that interferes with the ground! 

~Chuck~  Cooks Cat Claw sharpener and single tooth setter.  2018 Chevy Silverado and 2021 Subaru Ascent.
With basic mechanical skills and the ability to read you can maintain a Woodmizer  LT40!

taylorsmissbeehaven

I clean mine every so often with a light sand paper or emory cloth and wipe down with ATF. That having to jog about is annoying! Brian
Opportunity is missed by most because it shows up wearing bib overalls and looks like work.

WV Sawmiller

   Pretty common problem. Last time it happened to me WM said tighten the little spring connector. I did and has worked fine ever since. May even be a slight bow in the copper bar allowing better or worse connections at different spot.
Howard Green
WM LT35HDG25(2015) , 2011 4WD F150 Ford Lariat PU, Kawasaki 650 ATV, Stihl 440 Chainsaw, homemade logging arch (w/custom built rear log dolly), JD 750 w/4' wide Bushhog brand FEL

Dad always said "You can shear a sheep a bunch of times but you can only skin him once

John S

Yes, if the 35"s have the same spring loaded arm that contacts the strip, you may have to move slightly closer to the strip.  I have had this situation with both LT40's that I have owned.
2018 LT40HDG38 Wide

Rhodemont

I will clean the copper strip with some fine steel wool, coat with ATF and tighten the spring loaded contact.
Woodmizer LT35HD    JD4720 with Norse350 winch
Stihl 362, 039, Echo CS-2511T and now a CS-361P

SawyerTed

If it was all hydraulics that didn't work then suspect the copper strip and contacts there.  If it was just individual circuits, there is a micro switch on each valve that needs to be adjusted. The manual explains how. The micro switch activates the pump to power that circuit. 
Woodmizer LT50, WM BMS 250, WM BMT 250, Kubota MX5100, IH McCormick Farmall 140, Husqvarna 372XP, Husqvarna 455 Rancher

PAmizerman

Pretty good chance it's the micro switch.
I've been through 3 already. I always keep a spare on hand
Woodmizer lt40 super remote 42hp Kubota diesel. Accuset II
Hydraulics everywhere
Woodmizer edger 26hp cat diesel
Traverse 6035 telehandler
Case 95xt skidloader
http://byrnemillwork.com/
WM bms250 sharpener
WM bmt250 setter
and a lot of back breaking work!!

Rhodemont

Take Two:  Was milling yesterday morning and the hydraulics shutdown.  Shut the mill down, had a cup of coffee and it clicked... hey...been here before.  Cleaned up the bus bar and everything running fine.  I keep a piece of scotchbrite in my tool box to clean the copper but had neglected to do it for a while.
Woodmizer LT35HD    JD4720 with Norse350 winch
Stihl 362, 039, Echo CS-2511T and now a CS-361P

GAB

On my first outing this year, at one point I lost all hydraulics on my LT40.  Bummer!
Part of the contact shoe assembly consists of a white plastic block, That had taken a set and was keeping the contact shoe from making contact.  By pushing on the contact shoe I was able to make it work to pack up and go home for analysis and repair.
I would suggest that you remove the entire contact shoe assembly, clean it, make sure the springs are functioning properly, lube as needed and reassemble.
In my sawmill tool box I now have a spare contact shoe, and a white plastic block.  When you have spare parts it seems like the machine knows it and you do not need them.
GAB
W-M LT40HDD34, SLR, JD 420, JD 950w/loader and Woods backhoe, V3507 Fransguard winch, Cordwood Saw, 18' flat bed trailer, and other toys.

Bandmill Bandit

Get yourself a couple of cans of DE-OX-IT spray. Every time you clean/lube the felt, spray the copper strip and the contact shoe. Pretty much eliminates the problem. that way you only need to do a polish job once a year. at least thaths how its working for me.

Just picked up a can of the CRC Electronic Contact Cleaner but have not used it yet. supposed to be a better product as it leaves an anti corosion film so you technically could use less. We'll see, but I will always use a similar product for the head aches it saves.   
Skilled Master Sawyer. "Skilled labour don't come cheap. Cheap labour dont come skilled!
2018 F150 FX4, Husqvarna 340, 2 Logright 36 inch cant hooks and a bunch of stuff I built myself

Stephen1

I find a kick with the toe of my boot will help jog it loose and keep me sawing for the day. I adjust it the next morning before I start sawing. 
IDRY Vacum Kiln, LT40HDWide, BMS250 sharpener/setter 742b Bobcat, TCM forklift, Sthil 026,038, 461. 1952 TEA Fergusan Tractor

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