Ride Height

Discussion in 'Volvo Forum' started by Steviet, Nov 8, 2014.

  1. Steviet

    Steviet Bobtail Member

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    Nov 8, 2014
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    Does anybody know the absolute correct way to adjust the ride height on 1999 Volvo 770. Dealership tells you a different method which is normally not correct because they will give you the same answer for 22.5's as they will for 24.5's. Anybody with even a little common knows that if you use one adjustment for 22's then if you did the same for 24's that the driveline would not be within tolerance on one of the two. I had one dealer that had a really young new kid mechanic. He new hardly anything which made him a plus. he hadn't been around long enough to have his old ways of doing things. He actually had to read the book. the method that the book dictated was the only method that makes since because of the many different variations of tire height and 5th wheel types. this method was a formula that used distance from the center of wheel, the height of the tire and the distance from the frame and the ground. it was a mathematical formula with multipliers and dividers. the end result is a perfectly aligned drivetrain regardless of the variables. I forgot the formula. If anybody knows pls tell me. Thanks
     
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  3. nasriza

    nasriza Road Train Member

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    I know you're probably not going to like my answer but there is two ways I do it either top of chassis is level with top of tires I'm the rear axle or u can measure airbag from bottom of base to top should be 15.5 inches I've replaced probably over 1000 leveling valves on volvo and never had an issue doing it this way u have to bee on a level ground when doing this
     
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  4. bravoo67

    bravoo67 Light Load Member

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    Mar 15, 2012
    Brooklyn NY
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    I copied it from pdf file .. there is 11 pages about how to properly adjust the height on Volvo

    This is the one you are looking for I believe:



    The ride height is the distance from the axle centerline to the bottom of the frame rail. The ride
    height must be within the following specifications:
    Low frame [outside rail height dimension approx. 266 mm (10.5 in.)]: 196–216 mm (7.75–8.5
    in.)
    High frame [outside rail height dimension approx. 300 mm (11.75 in.)]: 179–199 mm (7.0–7.75
    in.)
    To accurately measure ride height:
    a. Measure from the ground to the bottom of the frame rail (1).
    b. Locate the axle centerline (the center hole on the end of the hub works best) using a steel
    rule or an appropriate tool (2). Measure from the ground to the axle centerline (3).
    c. Calculate the difference between (1) and (3). The difference is the ride height (4).
    d. Ride height should fall within specifications for low- or high-rail chassis (see above).



    Good luck!
     
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  5. Metalicious

    Metalicious Road Train Member

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    Sep 27, 2015
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    Just curious you mean to the top of airbag or to bottom of frame? Just measured mine and its 15.5 inches at rear from base of airbag to that bottom of the top plate of the airbag. Guessing mine would need to come down a hair?
     
  6. nasriza

    nasriza Road Train Member

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    Within spec I mean top level of airbag to bottom. Of airbag
     
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