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  1. #1
    turbo38t Guest

    Default 2:1 or 1:1 lever pics for PTO/Hyd Pump?

    Looking for som pics/ideas to make a 2:1 or 1:1 lever to move a shaft to engage a hydraulic pump on a crane truck. It was direct pill off the end of the shaft via a 5/16" solid end cable but we are reversing and pulling from the opposite side and the shaft is irreversible. So now the cable comes from the other direction and will have to be about 2" minimum above the shaft center and I need a way to pull it. I tried welding an arm on a bolt that went sraight up perpindicular from the end of the shaft but it puts an odd tension on the shaft and won't engage it. Dave

  2. #2
    Join Date
    Nov 2008
    Location
    Richmond, Ky
    Posts
    13

    Default

    Do you have an air shift pto or is it cable? I built a dump truck last spring and the pto was air shift, so i went to a parts store called tebco, they build dump trucks too. They sold me a ''tower'' that the lever for the air shift pto lever mounted into, and i bought a pump kit that also mounted in the tower. It is a locking T-handle that has a cable slide that bolts to a lever that pulls and pushes to engage and disengage the pump. I made the bracket the pump mounted on so I welded the bracket from the kit on to it, but it can also be bolted to something. It is a lot harder to explain than it is to install. The whole kit, tower and cable was $220, and it took a couple of hours to put it on. I'll see if I can put pictures of it on here tomorrow.

  3. #3
    turbo38t Guest

    Default

    Ok, this is what I have started to make. It's my poor attempt at ms paint LOL. I have the parts made and my drawing is not nearly to scale. The shaft that needs to be pushed/pulled to engage/disengage pump is 3/4" diameter with a detent ball. It takes a good whack with ur palm to engage/disengage. Orinally the cable had some brackets and pulled directly off the end of the shaft where the lever hooks to it. No, I am keeping the same engage direction but reversing where the cable is coming from. At the same time I am increasing leverage at a a 2:1 ratio. It's pretty simple but hope it works. Th shaft needs to throw1 3/8" overall, so the cable end of my lever needs to move approx 2 3/4" overall. The holes in the lever are at 3 5/8" center to center for the outside and the middle hole is about 1 3/16" from either hole on center. The link that attaches to the shaft and lever is to allow the slight vertical movement of the pivot point on the lever as it is pulled and the angle changes. Otherwise you would be attempting to pull the shaft upwards. Does this make sense? Does anyone think it will/won't work? Thanks. Dave
    Attached Images Attached Images

  4. #4
    Join Date
    Nov 2008
    Location
    Richmond, Ky
    Posts
    13

    Default

    Yes I kind of have a mental picture of it. Do you think you could use a small snatch block to change the angle of the cable. You can pick one up at Lowes for $10.
    2 -225 bobcats 1 Koehler 1 Onan
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  5. #5
    Join Date
    Nov 2008
    Location
    Richmond, Ky
    Posts
    13

    Default

    My bad I wasnt paying attention to the picture or that you all ready have the cable. That is simalar to what I did on the dumptruck. I have mine set to where it does not fully disengage, so if I don't dump the whole load the bed doesn't slam down.
    2 -225 bobcats 1 Koehler 1 Onan
    Kalamazoo band saw
    Dewalt dry cut carbide tooth chop saw
    Hitachi grinders and drills
    Miller 210 mig
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  6. #6
    turbo38t Guest

    Default

    I got ya. I am just hoping this is enough to disengage the pump. It's a tough detent in there. Dave
    Quote Originally Posted by chasew27 View Post
    My bad I wasnt paying attention to the picture or that you all ready have the cable. That is simalar to what I did on the dumptruck. I have mine set to where it does not fully disengage, so if I don't dump the whole load the bed doesn't slam down.

  7. #7
    Join Date
    Nov 2008
    Location
    Richmond, Ky
    Posts
    13

    Default

    If you end up with to much of that cable you can tie it in loose loop and it will stiil work fine.
    2 -225 bobcats 1 Koehler 1 Onan
    Kalamazoo band saw
    Dewalt dry cut carbide tooth chop saw
    Hitachi grinders and drills
    Miller 210 mig
    IR air compressor Koehler engine
    Hypertherm Plasma cutter

  8. #8
    Join Date
    Feb 2008
    Location
    Guam
    Posts
    177

    Default Total disengage

    You might want to put a slot in the end of your pivot arm that conects to the pump rod. also the pump will blow sooner our later running the truck at any speed for very long with the pump engaged.d.o.t. says you have to have a light on your dash when the pump is engaged, not a bad idea I've forgotten about mine more then once.

  9. #9
    Join Date
    Nov 2008
    Location
    Richmond, Ky
    Posts
    13

    Default

    Sometimes you can tell by the way the truck shifts if the pto is in especially the higher the gear.
    2 -225 bobcats 1 Koehler 1 Onan
    Kalamazoo band saw
    Dewalt dry cut carbide tooth chop saw
    Hitachi grinders and drills
    Miller 210 mig
    IR air compressor Koehler engine
    Hypertherm Plasma cutter

  10. #10
    turbo38t Guest

    Default

    I'm not changing how the pump works. It still engages in the same ....just from a different direction. Dave
    Quote Originally Posted by sailor View Post
    You might want to put a slot in the end of your pivot arm that conects to the pump rod. also the pump will blow sooner our later running the truck at any speed for very long with the pump engaged.d.o.t. says you have to have a light on your dash when the pump is engaged, not a bad idea I've forgotten about mine more then once.

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