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1997 Volvo w/Volvo Engine, compression brake is always on and in the low position

Discussion in 'Trucks [ Eighteen Wheelers ]' started by midwestconnection, Jul 4, 2011.

Page 1 of 2
  1. Jul 4, 2011 #1
    midwestconnection

    midwestconnection Bobtail Member

    39
    1
    Jun 23, 2011
    Detroit Lakes, Minnesota
    0
    14 speed Volvo Transmission and Eaten 264 Rears.

    It doesn't turn off and on with the switch that's on the dash.

    I'm thinking about pulling the fuse.

    I just bought the truck and drove it only five miles bobtail to the shop when I noticed this.

    Were they trying to save brakes?

    It is much harder to downshift with that brake on, I can hardly do it.

    Is it hard on my old motor too?

    I know it saves on my brakes and I like that but I like to use the switch on the dash and use it gently and sparingly so I don't hurt the motor or other parts.
     
    midwestconnection, Jul 4, 2011
    midwestconnection, Jul 4, 2011
    #1
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  3. Jul 4, 2011 #2
    Jumbo

    Jumbo Road Train Member

    3,669
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    Sep 4, 2009
    Appleton, Wisconsin
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    Maybe the on/off switch doesnt work?
     
    Jumbo, Jul 4, 2011
    Jumbo, Jul 4, 2011
    #2
  4. Jul 4, 2011 #3
    midwestconnection

    midwestconnection Bobtail Member

    39
    1
    Jun 23, 2011
    Detroit Lakes, Minnesota
    0
    It doesn't. I'm not sure if it has been disabled or what?
     
    midwestconnection, Jul 4, 2011
    midwestconnection, Jul 4, 2011
    #3
  5. Jul 4, 2011 #4
    Pablo-UA

    Pablo-UA Road Train Member

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    Oct 11, 2010
    Borispol, Ukraine
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    some quations about truck. Is it '98 Model year with D12C, ore old rig with D12A / D12B?

    Can you post VIN, ore dataplate shot ore engine ECM ID?
     
    Pablo-UA, Jul 4, 2011
    Pablo-UA, Jul 4, 2011
    #4
  7. Jul 4, 2011 #5
    deerslayer1543

    deerslayer1543 Light Load Member

    57
    10
    Jan 21, 2010
    topeka kansas
    0
    except for when i first take off i have the jakes on all the time and just "burp" it when i shift. thats how the owner of the truck showed me how to do it.
     
    deerslayer1543, Jul 4, 2011
    deerslayer1543, Jul 4, 2011
    #5
  8. Jul 4, 2011 #6
    midwestconnection

    midwestconnection Bobtail Member

    39
    1
    Jun 23, 2011
    Detroit Lakes, Minnesota
    0
    It'a 1997 with a V12B 425

    Model W1464TES

    Trans- VOL VT1414

    Rears- Eaten Ds 404 264 GS

    VIN 7274438149032
     
    midwestconnection, Jul 4, 2011
    midwestconnection, Jul 4, 2011
    #6
  9. Jul 4, 2011 #7
    midwestconnection

    midwestconnection Bobtail Member

    39
    1
    Jun 23, 2011
    Detroit Lakes, Minnesota
    0
    That's interesting I'll look into it. Thanks
     
    midwestconnection, Jul 4, 2011
    midwestconnection, Jul 4, 2011
    #7
  10. Jul 5, 2011 #8
    Pablo-UA

    Pablo-UA Road Train Member

    7,604
    1,642
    Oct 11, 2010
    Borispol, Ukraine
    0
    D12B - no VECU, directly controlled from cab and usually there are two problems - bad wiring and stuck EPG (valve on turbine, it is Exaust pressure regulator).
     
    Pablo-UA, Jul 5, 2011
    Pablo-UA, Jul 5, 2011
    #8
  11. Jul 5, 2011 #9
    Pablo-UA

    Pablo-UA Road Train Member

    7,604
    1,642
    Oct 11, 2010
    Borispol, Ukraine
    0
    to be sure use VCADs Pro to inspect switch conditions ore you can use test button. 4X codes are not fault codes but condition codes. They are used to know what switch is on ore off...
     
    Pablo-UA, Jul 5, 2011
    Pablo-UA, Jul 5, 2011
    #9
  12. Jul 5, 2011 #10
    midwestconnection

    midwestconnection Bobtail Member

    39
    1
    Jun 23, 2011
    Detroit Lakes, Minnesota
    0
    Thanks, I'll look into it.
     
    midwestconnection, Jul 5, 2011
    midwestconnection, Jul 5, 2011
    #10
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