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    Hillman Power Systems

    5.0 (1 review)
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    Updated 3 months ago

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    Services - Hillman Power Systems

    Circuit breaker installation

    Circuit breaker repair

    Doorbell installation

    18 More Services

    Doorbell repair

    Electric installation or replacement

    Electric panel installation

    Electric panel repair

    Electric repair

    Wire installation

    Wire repair

    Electric vehicle charging station installation

    Electric vehicle charging station repair

    Generator installation

    Generator repair

    Light fixture installation

    Light fixture repair

    Outdoor lighting installation

    Outlet installation

    Outlet repair

    Switch installation

    Switch repair

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    Ask the Community - Hillman Power Systems

    Alpine SOS & H & H Diesel

    Alpine SOS & H & H Diesel

    4.0
    (3 reviews)

    H & H Diesel came highly recommended from several friends at the office. I took a used RV (new to…read moreme) to them for service; engine, transmission and chasse. The bill was just under $1000. They charged me for 10 gal of transmission fluid at over $50 per gallon. The owner's manual indicated that the transmission requires 19 quarts plus some for hoses and cooler. After checking the fluid level I discovered that the transmission was 3 to 4 gallons over filled. I then checked the engine oil level and found it too was over filled. H & H agreed to come to the RV and adjust the transmission fluid and provide a refund for the overcharge. I concluded that it was an honest mistake. I then got the transmission fluid analysis results which indicated "Particle level is too high to determine accurate amount of particulates." The Allison authorized representative, indicated that the analysis results were consistent with a transmission failure and that a replacement would be about $10,000. Further discussions with the representative identified several performance characteristics that should be accompanying a failed transmission, which I had none. H & H agreed to rerun the analysis, on the fresh transmission fluid (if the transmission is failing the new fluid should be contaminated.) The second analysis was within specification. This may have been an honest mistake, which was very disturbing and which made me question everything H & H had done to the RV. My low rating is associated with the fact that H & H did not demonstrate competence to work on complicated and expensive large equipment.

    I used H&H diesel roadside service. My rig was disabled and I was 150 miles from my location. They…read morewere able to do the repair without towing it in. I was on my way in less then an hour. 2 Honest Harding working guys

    Hillman Power Systems - generatorinstallrepair - Updated June 2026

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