Fld120 cab mounts replacement and recommended jacking points?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Dino soar, Dec 18, 2018.

  1. Dino soar

    Dino soar Road Train Member

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    I'm going to replace the front cab mounts on my Freightliner FLD 120.

    As I'm looking at this I see that the channel under the floor does not line up with the frame rail, so I'm curious what jacking point you use to support the cab or what your procedure is to change them.
     
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  3. spsauerland

    spsauerland Road Train Member

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    Can you get a porta-power under the channel?
     
  4. Rideandrepair

    Rideandrepair Road Train Member

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    I used a 4x4 at point behind bushing. 2x4 works also. A piece of steel fence post over the extended screw part of a bottle jack resting on the piston part so it stays centered and a piece of wood up against Cab. Hard part is getting bolts out without a torch.I replaced bolts
     
  5. Working2party

    Working2party Medium Load Member

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    The 01 and 02’s I used to work on had set forward steer axles and duel fuel tanks. I had a short bottle jack that would fit between the forward tank bracket and a cab cab channel. I was 12-18” back from the cab mount which lifts the cab a little wonky, but I changed 100’s of them this way.
     
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  6. Dino soar

    Dino soar Road Train Member

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    I see what you're saying because if you jacked it up with the jack on top of the fuel tank bracket it would be out far enough to catch that frame on the bottom of the cab.

    I'll have to check that whole situation out again tomorrow.
     
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  7. Rideandrepair

    Rideandrepair Road Train Member

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    That sounds like a better way.
     
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  8. Rideandrepair

    Rideandrepair Road Train Member

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    I used a bunch of anti seize covered whole bolt as Old was all corroded out. Only regret is using orig bushings. Should have used ATRO silicone bushings
     
  9. Dino soar

    Dino soar Road Train Member

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    Yeah I got the originals, same as the rear suspension bushings, original equipment. Maybe next trip I'll do the ATRO.

    That's a good idea to use anti seize.
     
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  10. Rideandrepair

    Rideandrepair Road Train Member

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    I put atro anti walk rear spring bushings a few yrs back. Seems like a good design. Bushings more like hard plastic than rubber though. Passenger side cab bushing needs a heat shield as it dries up sooner from exhaust. I just did Drivers side last mo or so. Passenger side 2 yrs ago Lol. Not to worry it will need changing next year again. Sometime afterwards they will be equal to each other in pliability!!!Problem I have now is Rear cab airbags uneven Drivers side too low. Too much weight in side box I’m sure. Needs better Cab torque bar stabilizer set up. 84” bunk is top heavy. Only current difference from 70” bunk is my cab air bags are bigger. They skimped a bit IMO. Later 02 or 03 cab air ride system much better. Like to upgrade with at least some of newer parts in future
     
  11. Dino soar

    Dino soar Road Train Member

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    I'm going to change both of them at the same time. It looks like I'll have to take that heat shield off to put the jack on the passenger side.

    I'd have to look at a newer truck to see what the difference is from the 95 to the 02 and later trucks on the back end of the sleeper. I don't have time to seriously do it now, but I've wondered how I could change over to those pivot type bushings on the front of the newer trucks. I would imagine that would be a better system because the cab is completely free to ride up and down on air.

    All of the FLD sleeper trucks ride extremely well. I'm not sure if I drove any of the newer sleeper trucks from 02 and up to really be able to compare. But I did drive a Columbia for a while that was set up with that pivot type bushing in front. I was shocked how well that it rode, because it was a single axle day cab. That cab was so smooth, that if you turned your head and looked at the exhaust pipe it looked like the exhaust pipe was going up and down rather than the cab going up and down.

    I'll have to look into that at another time, but I like the idea of those bushings.
     
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