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Bucky1320's avatar
Bucky1320
Explorer
May 26, 2015

Help with 1998 Harney Renegade DP

I have owned this rig for 6 months. I put new tires on it last fall. It is on a Magnum chassis with 4 air bags. 24,000 miles. Bilstiens I think original.
Rough ride and not as resistant to wind as I expected with a DP.
I can't find a pressure chart for the Hankooks. I have been running 90 to 95 in the 275/70r22.5's...load range H. That may be a bit high. I haven't weighed it, but placard says 8900 front and 17,000 rear. Placard says 85psi front and 80 rear for 265/75R's.

I may go down the road to get Koni shocks on it. But I figured I would start with the free stuff.
We do pull an enclosed race trailer with it, and the extra weight at the hitch does seem to make things a bit worse.

Anything right off the bat you can suggest? Corner weights aren't easy around here...but I may be able to get axle weights at a grain elevator possibly.
  • 7-3/4 and 9-1/2 rear for mine. But it does say magnum on a nameplate.
  • Gary. wrote:
    Maintaining ride height is required for the air spring system to function effectively and is a critical part of the air ride system. REYCO FRONT SUSPENSION RIDE HEIGHT is measured from the top of the air bag to the bottom of the metal bell shaped area that comes out of the bottom of the air bag. It is 8 3/8 inches from top to bottom. THE REYCO REAR SUSPENSION RIDE HEIGHT is measured from the very top of the air bag where it contacts a frame rail to the bottom of the metal bottom of the bell shaped area that sits on the lower steel beam. It is 12 inches. Hope this might help. Gary


    Excellent, thanks Gary.

    Bucky,

    Remember to be SAFE and use safety stands, particularly when adjusting ride height (or have someone familiar and with the right equipment do it). It is no different than adjusting ride height on any OTR truck.

    Let us know what you find. If too low, the coach can bottom out easily and crush the shocks on compression. If too high, bag pressure will be high and if really high, can pull the shocks apart on extension.

    If you do not have adequate ride height adjustment, there are some relatively inexpensive variable length ride height rods that we can point you toward.
  • Bucky1320, I have a 2000 Harney Coach 37' Riata and I don't know if this will help you but Monaco says my chassis is BLUE STREAK. The vehicle suspension is a Reyco Air System. It has 4 air bags, they are positioned behind each axle and under the frame rails. The air bags are attached to the axle with a support beam. The bags use air pressure to support the vehicle weight. Leveling valves control the amount of air pressure to the air bag. The leveling valve is responsible for maintaining ride height. Maintaining ride height is required for the air spring system to function effectively and is a critical part of the air ride system. REYCO FRONT SUSPENSION RIDE HEIGHT is measured from the top of the air bag to the bottom of the metal bell shaped area that comes out of the bottom of the air bag. It is 8 3/8 inches from top to bottom. THE REYCO REAR SUSPENSION RIDE HEIGHT is measured from the very top of the air bag where it contacts a frame rail to the bottom of the metal bottom of the bell shaped area that sits on the lower steel beam. It is 12 inches. Hope this might help. Gary
  • No being a "Pusher Guy" makes me fall back on what makes sense.

    The wind resistance might be a function of the shocks. If the coach is pushed side to side by the wind, that would indicate the coach is rocking side to side. On my gasser, there are air bag helpers which i can inflate. They help control the side to side movement, and it works really well.

    Rough ride can also be shocks, or like you said, over inflated tires. 10 lbs makes a noticeable difference especially in the front. If your shocks are original, then it is certainly time.

    Start with lowering your air pressure, shocks, then alignment may help the handling issue.....MAY help.
  • wolfe10 wrote:
    Have you checked ride height? An inexpensive place to start.


    I can, but don't know what the spec is nor where to take the measurement.
  • Have you checked ride height? An inexpensive place to start.