How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Wayne Your Own Question
Wayne
Wayne, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 8427
Experience:  worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling
6825259
Type Your Medium and Heavy Trucks Question Here...
Wayne is online now
A new question is answered every 9 seconds

Need to figure out why this freightliner Columbia locks the

Customer Question

Need to figure out why this freightliner Columbia locks the brakes under a slight apply. Seems to be better when trailer is loaded. Replace tractor protection valve and treadle valve.
Submitted: 4 months ago.
Category: Medium and Heavy Trucks
Expert:  Wayne replied 4 months ago.

Hi I'm Wayne

I will help you with this

is it all 4 wheels on tractor ??

when was last brake Job

let me know Please

Customer: replied 4 months ago.
Sorry for the vague post, but it's only on the trailer... locks all four under slight pressure.
Customer: replied 4 months ago.
Not sure when the last brake job was doneness but the equipment has been neglected.
Expert:  Wayne replied 4 months ago.

Thank you for that

Morning , so it is on the trailer only

2 things to do this

wrong crack pressure on the QR valve

or worn S-Cam bushings

I hope this help you

Hi if this helped you

Please rate my answer 3 or more stars

If need more info use the info button

Not Poor/Bad service