Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

C-15 weak jake

Discussion in 'Trucks [ Eighteen Wheelers ]' started by T2416, Dec 3, 2008.

Page 1 of 7
  1. Dec 3, 2008 #1
    T2416

    T2416 Bobtail Member

    5
    0
    Oct 5, 2008
    Laramie, WY
    0
    Ok, is there anything that can be done to get decent jake brake perfomance out of the cat motors, that even compares to the ISX? :biggrin_255: I was reading the jakebrake FAQ the other night, and they state it's not advisable to try and up the manifold pressure... my question is, why is there such a disparity between manifold pressure seen on the ISX's vs the cat engines? For that matter, why are the jake brakes on the cats so weak in comparison to the ISX engines?

    I'm dropping 6-7 miles of 7% every day... I'd really like to get it done faster, w/o smoking the brakes or having to crawl down it in 10th (18 speed).
     
    T2416, Dec 3, 2008
    T2416, Dec 3, 2008
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Dec 3, 2008 #2
    DDS

    DDS Medium Load Member

    519
    177
    May 20, 2008
    Toronto
    0
    Need your engine serial number to give you more information, have you had the top-end set?
     
    DDS, Dec 3, 2008
    DDS, Dec 3, 2008
    #2
  4. Dec 3, 2008 #3
    550hpW900L

    550hpW900L Road Train Member

    1,874
    1,090
    Jan 29, 2008
    norcal
    0
    They probably need to be set, i found the 3406E and C15/16 brake better than any cummins i ever drove.

    I noticed i lost some braking with my big turbine housing and B manifold but not enough to not out brake any N14 or ISX i know of. Have a friend with a ISX that complains of the same thing as you.
     
    550hpW900L, Dec 3, 2008
    550hpW900L, Dec 3, 2008
    #3
  5. Dec 3, 2008 #4
    CaterpillarWrench

    CaterpillarWrench Light Load Member

    188
    49
    Nov 11, 2008
    Wrenching feverishly
    0
    Get the top end adjusted.
     
    CaterpillarWrench, Dec 3, 2008
    CaterpillarWrench, Dec 3, 2008
    #4
  7. Dec 4, 2008 #5
    T2416

    T2416 Bobtail Member

    5
    0
    Oct 5, 2008
    Laramie, WY
    0
    Done. Supposedly. Cat dealer in Cheyenne. Was in for new injectors about 2 1/2 months ago, then back in about a week ago when the jake went on the fritz. I let them know the jake performance was lacking, but they didn't have much to offer for an answer.

    MFG date on the truck is 08/03. Set at 525. MBN- everyone's fav. With 3.90 gears, btw. I have yet to drive a cat that comes close to any ISX I've driven, as far as jake performance goes. Seriously. The ISX guys are blowing my doors off down the hills. I'm beginning to miss the red motor, but it's not my choice to make. Might not matter much once the snow and ice become a daily PITA, but that won't last forever.

    ?

    I can probably have someone else check the top end, but I'm wondering what other avenues exist... it really is lack-luster.
     
    T2416, Dec 4, 2008
    T2416, Dec 4, 2008
    #5
  8. Dec 4, 2008 #6
    C16KIWI

    C16KIWI Medium Load Member

    575
    142
    Jun 14, 2008
    New Zealand
    0
    I drove a C-15 in a KW while mine was in the shop 3 weeks ago and the jakes on that were weak they made all the right sounds but just weak.
    Over here CAT jakes arent even on the same page as ISX jakes thats why I have a brakesaver as well combined with jakes they will blow away a ISX easy down hill.
     
    C16KIWI, Dec 4, 2008
    C16KIWI, Dec 4, 2008
    #6
  9. Dec 4, 2008 #7
    DDS

    DDS Medium Load Member

    519
    177
    May 20, 2008
    Toronto
    0
    then back in about a week ago when the jake went on the fritz\

    Has the jake power changed since you owned it??? I need a engine serial number to check to see if you have jake brake or pac brake. If is a pac brake, you may have a cracked housing or worn slave bores. The jake brakes can also move resulting the settings going out.
     
    DDS, Dec 4, 2008
    DDS, Dec 4, 2008
    #7
  10. Dec 4, 2008 #8
    WallyGator

    WallyGator Medium Load Member

    333
    83
    Apr 6, 2008
    Clearwater,Florida
    0
    I have the same problem with my 3406E ser#5ek39064 lots of sound but not much more. my 60series was 10times better at slowing you down but not much noise:biggrin_2554:
     
    WallyGator, Dec 4, 2008
    WallyGator, Dec 4, 2008
    #8
  11. Dec 5, 2008 #9
    Truck Driver

    Truck Driver Medium Load Member

    330
    136
    Dec 5, 2007
    Sacramento, CA
    0
    The jake on the 430, series 60 detroit i'm driving is deafining but dosen't slow the truck even bobtail while the jake on the 365, 3176 cat i drove could lock up the drives and was barely audiable in comparison.
     
    Truck Driver, Dec 5, 2008
    Truck Driver, Dec 5, 2008
    #9
  12. Dec 6, 2008 #10
    rockrawlin

    rockrawlin Bobtail Member

    47
    20
    Sep 5, 2008
    Chico, CA
    0
    I love the Jake in my 1LW Cat. I can come down a 6% grade fully loaded at 55mph and never touch the brakes. It builds upwards of 24-25 psi manifold pressure.
    Not even in the same ballpark as the old Series 60 or Cummins.
     
    rockrawlin, Dec 6, 2008
    rockrawlin, Dec 6, 2008
    #10
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

    • Page 1 of 7