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  1. T

    PC40-7 Wiring harness fried

    Does anyone know where I might get a junkyard controller for Komatsu pc40 r-8 its a Hitachi AST1-11 the Komatsu part # is YM129136-77100 its common among yanmar powered equip
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    PC40-7 Wiring harness fried

    It wont start with keyswitch. Ive checked the switch and the starter both are good . the what they call safety relay is not sending juice and I'm pretty sure I've zeroed in as being one of the problems, but its 400 bucks. can I retro fit some thing else? . its got some kind of sealed box with 4...
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    PC40-7 Wiring harness fried

    I know this is 9 years old but its the only discussion relative to what im dealing with. I got a wire that must have either gotten short to ground because of mice nesting under the seat or I shorted to ground one time a few years ago when I goldberged an aftermarket fuel pump in because dealer...
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    Komatsu PC 40-8 1997

    no I dont think so. I was able to get it out for inspection. Mice got into it. looks like one wire in the harness thats hot when the key is in on position got hot enough to burn the insulation , the tape and the loom tubing for a good length of the run. got to find out why. The starter is not...
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    Komatsu PC 40-8 1997

    yeah the seat I took it out and I can get a little closer to that back corner im thinking that all the buzzer ,relay and a few other gizmos are mounted on a plate that installs from the back of the toolbox but I cant see any bolts that I can undo it with service manual has no detail about it at...
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    Komatsu PC 40-8 1997

    Hello I need to gain access to the saftey relay in the backright hand side of the toolbox under the seat. Has anyone else ever had to do this I cant figure out for the life of me how to get access to that seemingly secrer compartment??
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    komatsu pc40-r8 blows #5 fuse 30 amp when ign switched to "on"

    I ohmed the load side of the fuse and its a short. could it be a diode? Under the seat is the glove-box and in the back right hand corner is a compartment that houses a relay and a timer associated with the circuit but I cannot figure out how to access the compartment ? has anyone ever gotten...
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    Cat 508 skidder

    thanks lg but is there any way to verify that the shop manual makes no refrence to it. theres a tag on top but i cant see anything on it cause the hydraulic tank is about 1 inch above it
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    Cat 508 skidder

    Hello I have a cat 508 skidder and i found that there maybe some small dia copper lines from the transmission valve to various places on the bellhousing are disconnected. I just replaced the charge pump because it failed and i would like to return the machine to its original configuration. The...
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