Peterbilt 379 Fan clutch Squeak when engaging.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Don379, Apr 29, 2021.

  1. Dino soar

    Dino soar Road Train Member

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    I used them for my Kysor also.

    There was something that happened with the kit like the Box didn't have a number on it or didn't have the right number or something and when I called them their customer service was awesome. They stayed right on the phone with me and they tracked everything down until we were one hundred percent certain that I had the right kit.

    I would highly recommend them.
     
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  3. Don379

    Don379 Medium Load Member

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    I don’t want to hear a bunch of fan roar while going up in rpm and rowing through the gears. Are these kit masters still quiet while fan is on speed one? Pretty quiet?
     
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  4. God prefers Diesels

    God prefers Diesels Road Train Member

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    Mine is a single speed setup. I was just vouching for Kit Masters doing me right as a company.
     
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  5. Dino soar

    Dino soar Road Train Member

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    Me too.
     
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  6. Smellfunny

    Smellfunny Road Train Member

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    I have always had superior customer service from Kit Masters. Their products are top notch.
     
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  7. Don379

    Don379 Medium Load Member

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    Well i was back and forth with a salesman from kitmasters that was quick to respond on email. I called him on the phone and sold the product even better. i went ahead and ordered a new 2 speed fan clutch from kitmasters. Direct drop in replacement. Im interested to see how this works for my application. ill let you all know when i get it
    Superior customer service just like you guys said. how could you say no
     
  8. Don379

    Don379 Medium Load Member

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    installed the new 2 speed on Saturday. Today it got its evaluation. 85 degrees and humid. Made 3 two hour round trip loads in stop and go traffic and up hill with 23 tons. 85 degrees and humid. The coolant stayed at 185 degrrees 85 percent of the day while doing pulls and sitting at lights. Buy late afternoon when the sun was high, it hit 190 degrees. The fan clutch never engaged once even with the a/c on full blast. Kinda weird not hearing that thing cycle and roaring. Last load of the day, i hit 2 long steep grades with motor wound up and loaded to the max. Fan clutch engaged for the first time and cycled off and stayed off. With the one speed hornton, the dam fan clutch always came on to cool the radiator and the dam a/c. Roaring fan and hp loss
    The brochure, says that the fan will be spinning at 300 rpm while disengaged and on speed 1. vs 1800 rpm while at 1800rpm on the motor. That 300 rpm spin is just enough to keep the a/c condenser cooled and pressures down as well as enough air to keep radiator cool to keep the fan clutch from constantly cycling in stop and go traffic. They claim no hp loss and i agree. The fan is quiet and you cannot hear it spinning at all with windows down and on speed 1. I highly recommend this product even for otr guys looking to get rid of a/c fan clutch cycling. Unbelievable product. Thanks to all you for recommending this
     
  9. lester

    lester Road Train Member

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    That sounds like something that would be perfect for my operation. Spend most of my night at 1450rpm and 14 percent engine load while unloading and have to run the fan manually to keep temp from getting to the 217 degree auto fan engagement.

    Thank you for the follow-up.

    I have a few questions but I'm to dang tired to think about it now
     
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  10. Don379

    Don379 Medium Load Member

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    Let me. I’ll try and get some video of the fan operation in both speeds tomorrow
     
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