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Author Topic: timber harvester sawmill ht3025  (Read 605 times)

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Offline willy54

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timber harvester sawmill ht3025
« on: December 04, 2020, 12:23:53 PM »
Hey all - I'm new to this forum even though I've tapped into a few of the discussions over past few months. I'm a wood-aholic but most of my work has been using old barn timbers to make furniture. Last year I picked up a timber harvester bandsaw that had been sitting in a field for 10 years!! So far I've rebuilt, rewired and refurbished about everything. I have everything functioning but the hold down dogs won't work. All the other hydraulics are functioning. So without a schematic of electrical and hydraulics I'm stymied. The dogs move up and down using 4 hydraulic motors and none of them will work. all the functions work off a single manual flow directional box. I'm getting pressure to them so my guess it is in the return somehow. But the hoses run through the frame so kind of hard to track back. So if anyone has any advice - and especially if anyone knows where I can get my hands on a manual and set of schematics that would be great!!! 

Offline moodnacreek

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Re: timber harvester sawmill ht3025
« Reply #1 on: December 04, 2020, 08:35:09 PM »
If it sat a long time perhaps a relief valve stuck. I really don't know anything about your machine but the hyd. control valve will have at least one. It should be a hex nut insert.

Offline willy54

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Re: timber harvester sawmill ht3025
« Reply #2 on: December 08, 2020, 07:27:05 PM »
ill take a look around for that - does each directional control valve have a relief valve or is it a system valve?

Offline tylerltr450

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Re: timber harvester sawmill ht3025
« Reply #3 on: December 11, 2020, 10:18:36 AM »
if you want someone to look at clousers farm can help you out.

Ashame your so far away or I could lend a hand.

hydraulics are simple and this system on the TH is very simple the only thing to keep in mind is the loop and what is over electric.

Either the return is not working or something in the valve. Relief valve could be acting up however if your relief valve is stuck closed your in trouble that is one scary situation. The motors to move the dogs could be messed up and not moving the motor itself. Much to review pics help also.
Timber Harvester 36HTD25 fully loaded
2006 Dodge 2500 first Auto to NV5600 swap, EFI Live Tune by me
John Deere Tractor
Massey Ferguson 711B SkidSteer

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