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Light trucks, gotten so sad

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Joined: 23 Dec 2020
Location: Utopia
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 01 Feb 2026 at 6:18pm
Put a few mile on and no problems at all. Topped up the cooling system again and then ran after a skid steer with my trailer hauling it back to the shop. All good so far.



Truck even has a starter dispenser I wasn't aware of:






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Joined: 23 Dec 2020
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 01 Feb 2026 at 7:51pm
Forgot the load photo. Skid steer runs but has rodent/wiring issues so cannot unlock the foot pedals to drop boom. Hauled it about 16 miles like this but no issues:

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 10 hours 39 minutes ago at 3:11am
Broke into this machine yesterday and it's a retirement community for rodents, beetles, and other small animals. The belly pan is almost full of rodent nest which explains why there are electrical problems with the machine. The electronic instrument cluster, (EIC) is an absolute mess having a large rodent nest built against it for several years the machine has sat disused in a barn. The panel does not illuminate at all and this is the soft and hardware interface between human, and machine. Basically it has it's skinners into everything and needs to work for the machine to operate. Here are some quick shots after pulling the panel down:







Rodent nest around hydrostatic drive units. This is not the worst of it:



Not a single fuse is blown in the machine but very little actually works. There is a maintenance bypass switch incorporated that bypasses many of the incorporated safety circuits but this when selected locks out boom and bucket functions. 

That instrument cluster is long obsolete and I've found nothing used to substitute. I'm going to work with this one a bit later today but in all likelihood, will be reverting to "relay logic" to get the machine back into service. Thinking I can retain many, (if not all) safety and monitoring features this panel provided. A small digital totalizer, ammeter, fuel, and temperature gauges would be incorporated, but will climb that mountain once at it's foot. 

Tomorrow, (Thursday) is supposed to be above freezing so will get the machine outside and give it a good bath with the steam cleaner. Not really dirty or greasy, but a lot of dried dust and of course rodent remains/nest. This should all break up easily with the water stream and the very hot water will kill anything still living, or run it off..... 

I installed a new injector pump as the old one was frozen stiff from biodiesel and setting several years and the engine runs well. I can drive it easy enough, but with that EIC inoperable, nothing electrical can be enabled including the boom and bucket functions.

Another adventure begins as they say.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 10 hours 17 minutes ago at 3:33am
Found a manual for the machine online and got it downloaded. Looking into the manual this instrument cluster should come to life as soon as a body sits in the seat. This starts the self test routine and once that completes, the keyswitch will start the glowplug cycle and the engine can be started. This instrument cluster does not come to life at all so nothing works with the bypass switch in the "run" position. Nothing works when this switch is in maintenance but the engine can be started without glow plug assist. 

Looking through an electrical print I see where the 12VDC interlock "Daisy Chaining" takes place and after physically removing the seat to check for voltage at the seat weight sensing switch(s) connectors, it is found to be present. However, the rear switch does not have continuity when depressed. Jumpering the plug to bypass both seat switches gains nothing. Next in line is the parking brake switch which has to be engaged to pass interlock voltage to the instrument cluster. It is present and that 12VDC interlock voltage seemingly runs up to the instrument cluster as it should. This is when I pulled the instrument cluster down and found the mounting cavity a solid nest. I did not check for a compromised wire and stopped there. 

Hope to gain on it shortly.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 10 hours 13 minutes ago at 3:37am
Geez, wasn't paying much attention to what thread I was posting to. Feel free to move it to the Construction Equipment field if desired.

Don't like hijacking threads much myself so feel free to either move or delete if wanted.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 9 hours 6 minutes ago at 4:44am
Is as pertinent on here as HE Codger. All these fast to obsolete electronics controls set these machines on a date for scrap. Intentional.

The manufacturers not only want faster to build but faster to throw away so will buy more. Was nothing wrong of all mechanically controlled hydraulics or operator systems, just too easily field repaired and less bells or whistles.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 2 hours 7 minutes ago at 11:43am
After cleaning up the board and finding a compromised prior repair to capacitor landings/terminations, I have a couple of lights present that should not be. That said however, I did find a control fuse in the engine compartment blown that is in series with this board so now have all five 12VDC power supply inputs present. Have a single ground present on a termination, but only six of 10 retention fasteners were present mounting the board to it's support structure in the machine. These fastener points were rusty and corroded so they were chased with a 6-32tpi tap and pads on board cleaned with isopropyl and a new, stiff poly brush. Much of the crap has been scrubbed and washed away leaving a clean surface. Have not found any compromised solder runs, nor microchip legs so hopefully a couple of ground wires running to the back of the machine, or their respective terminations are culprit. There seems to be gain had with this project.

I put a call into the dealer I help out with the board serial, model, and revision numbers which were perfectly legible after cleaning. I've asked for a print of the board circuitry so hopefully if they'll respond I can repair this long obsolete thing. A replacement type is over $1K in price so have some room to fiddle and this is kind of different and relaxing to me. 
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Joined: 12 Sep 2009
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 7 minutes ago at 12:43pm
GREAT to hear PROGRESS !! Used to dread fixing  PC that mice had 'relocated to'.... Used to 'brushcut' 1" paint brushes for  PCB cleaning detail. Once 'clean' would use heat gun(aka hair dryer) to be dry it off, then do it again and once more.
Hopefully you've got real good pictures of the PCB, both sides as well as 'part numbers' on the it. For giggles, toss those number into Google, you might be surprised what comes up.
If the part numbers on the actual chips are easy to read,it'll help if you decide to 'reverse engineer' that board . Having actual wiring diagram of HOW it connects is vital to getting it up and running.
3 D-14s,A-C forklift, B-112
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 26 minutes ago at 1:24pm
I did try google and found a few still available but in the stratosphere as far as pricing. Also found two places on the internet that state they can repair this but both are $1400+ for the servicem, so not really a contender.

Talked to the owner and they are alright with me incorporating relays, enable buttons, annuciator lamps, and digital/analog gauges in a new aluminum faceplate I can fashion. Don't think I'd have a hundred bucks in the job but do want to see if I can get this original board working first. Going to be ringing out a couple of harnesses that run throughout the ROPS roof that has had prior rodent damage this afternoon. Hopefully a compromised ground wire is all.
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