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Single axel or dually?

Discussion in 'Commercial Snow Removal' started by Snow Pro, Oct 31, 2000.

  1. Snow Pro

    Snow Pro Senior Member
    Messages: 146

    I've posted over 100 responses to your questions in my first month here. Now I need some help.

    I just bought a 1980 Ford F250 a V-box salt spreader in place of the bed in back, on a single axel. I'm wondering if I should replace the single axel with a dually because of the weight it will have to carry. It was used by a school the last 14 years so it never had to run more than around their parking lot. They even had a little 3 gallon gas tank to replace the regular tank when they took out the bed. We'll be using it to go from job to job and alreasdy bought a bigger gas tank.

    The tires are dry rotted and need to be replaced. My friend told me 8 ply 16.5" tires will hold 2700# each (5400# total) and should be enough to carry the spreader filled with salt. I think it's a 1 yard hopper.

    Would you guys recommend putting a dual axel on there and getting 6 new tires or just keeping it as is with the 4 tires?
     
  2. GeoffD

    GeoffD PlowSite.com Veteran
    Messages: 2,266

    The Ford, 4.10 and 5.13 rear axels are set up for dual rears as well as single. At least that is how they are set up on all of my trucks. All you have to do is buy two extra rims, and the extended studs.

    Geoff
     
  3. DaveO

    DaveO PlowSite.com Veteran
    from Ma.
    Messages: 299

    Rear GAWR

    Snow Pro,

    What is the rating of the current rear axle? I am not sure what a 1 yard spreader weighs fully loaded, maybe some one else does.

    FYI.. the rear tires on my Ram must be rated for over 3K lbs each, since the rear GAWR is 6K+lbs. They are 16" Michelins.

    I would find out how much the spreader weighs when full, then make my decision, based on the rear GAWR.

    Dave
     
  4. thelawnguy

    thelawnguy PlowSite.com Addict
    Messages: 1,011

    Load range E 16 inch tires are good for 3042 each when properly inflated. There is a 16 inch F rating used on the new Fords which is how they can milk 9900 lb GVW out of a SRW truck.

    Those 1 yard spreaders are designed for Ranger and S 10 type trucks so I dont see the need for adding duals, fender flares, then changing the front hubs to fit the dual rims unless you carry 2 spares, etc.

    [Edited by thelawnguy on 11-01-2000 at 10:03 PM]
     
  5. Alan

    Alan PlowSite.com Addict
    Messages: 1,393

    Geoff, do those Fords run the offset wheels in the SRW configuration? If not you would need 4 wheels to accomodate duals.
     
  6. GeoffD

    GeoffD PlowSite.com Veteran
    Messages: 2,266

    Alan, your right on that one, you would need to buy four wheels. The point I was trying to make, was you don't need a new axle, Just extended studs, and like Alan said, 4 off set wheels.

    Geoff
     
  7. Snow Pro

    Snow Pro Senior Member
    Messages: 146

    Does anyone know if there some place I can find out what the rear axel ratio is. Is it coded into the VIN? Can you figure it out by looking at it somehow?

    Thanx guys!
     
  8. DYNA PLOW

    DYNA PLOW Senior Member
    Messages: 295

    is it a full floating rear axle?meaning the wheel bearing carries the load,or is it a semifloating axle where the axle shaft itself carries the load. full floater is stronger! you can tell a full floater by looking at the rear wheel, is there a big round hub sticking thru the rim? if so you have a full floater.
    axle ratio can be identified by a tag bolted to the rear axle cover,but it is probably rusted off by now.there are other ways to find out but my guess is they are either 3.73 or 4.10 gears. both will suit you fine for plowing and or salting. if you really want to find out the ratio let me know and i'll tell you how.
    fords rule
    dan
     
  9. Chuck Smith

    Chuck Smith 2000 Club Member
    from NJ
    Messages: 2,317

    <img src="http://www.chuckschevytruckpages.com/images/14boltend.jpg">

    This is what DYNAPLOW is talking about. This is a GM axle, but it' a "fullfloater". Looks almost the same as the Dana 60. Not sure what fullfloater Ford uses, but if the axle you have is a fullfloater, the hub will look very similar to this one.

    ~Chuck
     
  10. DYNA PLOW

    DYNA PLOW Senior Member
    Messages: 295

    Thanks Chuck for pointing that out, ford has used DANA axles
    as well as their own axle they call the 10.25. meaning 10.25" ring gear.
    further more i agree with you that cv joints and ifs suspensions in pickup trucks are not heavy duty.
    leaf springs for me!
    dan
     
  11. Chuck Smith

    Chuck Smith 2000 Club Member
    from NJ
    Messages: 2,317

    Just went out and took a look at my tires. On my 80 GMC I have Cooper Discoverer tires. They are 33" x 12.5" - 16.5, 8-ply, load range D, and the info on the sidewall says max load 2930 @ 50 PSI.

    I know when I had BF Goodrich Mud T/A's on my 77 Chevy, the load rating was well over 3,000 pounds (I think it was 3,600). They were good tires too, 8-ply, and a 3-ply sidewall. The fact that they were 35" tall, may have increased the load capacity though.

    I'd stay with the single rear wheels, and get tires with a rating of about 3,000 pounds each. That would "cover you" for a GVWR of up to 12,000 pounds, which you would never even come close to.

    Figure a yard of straight salt dry is about 1850 lbs. and wet, or mixed with sand as much as 3,200 pounds (high end of the scale). Not sure how much the salter weighs vs. the original bed. My 80 GMC with no load on it tipped the scales at the gravel yard at 5,710 lbs. Maybe you can stop by a mason yard, gravel yard, or scrap metal yard, and get your truck weighed empty. That will help you know just how much your potential GVW could be. Granted, all of the weight from a load of salt in the spreader wouldn't be over the rear tires, but much of it would be. With "3,000 lb" tires, you'd be fine.
    I had a yard of washed crushed stone on my 80 GMC, and tipped the scales at about 8,200lbs. The tires had a little belly in the sidewall, but not much. I was more worried about braking distances than the load on my tires.

    ~Chuck
     
  12. DaveO

    DaveO PlowSite.com Veteran
    from Ma.
    Messages: 299

    AXLE RATIO

    Snow Pro,

    The weight ratings on my Ford are on the driver's side door frame. The tag has GVWR, FAWR, RAWR, and the specs for the truck(AXLE RATIO, paint etc.). I believe it is below/near the latch post. The axle ratio is a code, if you let me know the #, I can look it up.

    Dave

    [Edited by DaveO on 11-02-2000 at 04:11 PM]
     
  13. CCSwanson

    CCSwanson Member
    Messages: 38

    Another thing to think about is the width of the DRW is your plow able to cover the "new" width at full angle with the new duals.
     
  14. Snow Pro

    Snow Pro Senior Member
    Messages: 146

    Thanks guys! I'll check it out when I come back into town and see the truck again. I appreciate all your help.
     
  15. Doug406

    Doug406 Member
    Messages: 65

    How to check axle ratio

    lift the rear wheels off the ground, mark the drivshaft with a grease pencil and rotate the rear tire one time while watching how many times the driveshaft turns around. Will be between 3 and 5. 3 and a half would be 3.55 gears etc.