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    Hydraulic Pump coupler R&R komatsu PC40-7

    Am looking for repair manual/ info regarding hydraulic coupler replacement. Installed new starter recently and noted buildup of powdery rubber on old stater housing internal to flywheel. Material looked similar to the pile of rubber under my washing machine when the coupler failed. With 6500 hrs...
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    Diagnostic procedure for fuel/ temp / and alarm buzzer on Komatsu PC40-7

    As posted earlier I had a short in my wiring harness that required me to remove and repair the harness. All functions now work correctly with the exception of my temp , fuel gauge and warning/start up buzzer. I have verified that each item is receiving power to from the harness yet they do not...
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    PC40-7 Wiring harness fried

    I am a new member here that found this site while searching for some info on my excavator. This is my first post. I am hoping to learn more about repair and maint of my equipment, and now I have a little issue that I need to resolve. I have a 96 Komatsu PC40-7 excavator I use on my property. My...
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