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Recent content by Andy1845c

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    Lull 644B owners- Whats normal - whats not

    Getting to the end of my list of issues on this machine, but this one is odd - The boom hoist circuit is weak in the UP direction - at idle I am getting around 1000PSI at test port 1. At full throttle I get somewhere around 2800. It struggles to lift the boom at idle with the forks on. If I...
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    Lull 644B-42 Low steering pressure

    Well I finally made some headway on this today. I had some others also say it was likely a blow piston seal. I extended each steering cylinder to full stroke and then popped the line off and tried to steer more to see if I had fluid bypassing. I had none on either side. So this morning I...
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    Lull 644B-42 Low steering pressure

    I thought about that- but if I had a cylinder issue do you think it would steer ok in 4 wheel modes with the back jacked up? It’s almost as if the lower pressure is enough to run one axle, but when you series the cylinders as it does in 4 wheel modes, it’s just not enough. The seal kits for...
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    Lull 644B-42 Low steering pressure

    Still working through issues on this machine - Where I am at right now is the steering is difficult in either 4 wheel modes. It will steer a little left or right, but then the wheel binds up. In front steer it steers fine. If I jack the back axle up and get the pressure off the wheels it steers...
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    Detroit 3-71 Blower parts - Free to a good home

    Cleaning up the shop and came across this. Was off a 3-71 in a road grader I had. One lobe is broken and the inner surface pretty scored up, but if there is anything here someone can use, I would gladly give it away for the cost of shipping. Its aluminum so not terribly heavy. If anyone wants...
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    LULL 644D-34 HIGHLANDER

    Well thats a bummer. Looks sort of like its been partially broke for a while. Looks like something that could be welded up by a decent welder though. Post pictures of your repair!
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    Ducting Air Compressor To Outside

    We run 3 screw compressors where I work. We direct the heat inside in the winter and outside in the summer. They do not like the cold. If the compressor room gets too cold they will fault out. Not sure how new/advanced yours is, but the new ones will throw a fault and shut down below 35F. When...
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    MLULL telehandler

    I assume you mean a Lull? JLG has a bunch on their website for free download. https://onlineexpress.jlg.com/technical-publications?_gl=1*1bf2kq3*_ga*OTI3OTQ1MzQ1LjE3MDc2OTA0MTE.*_ga_ZC93P6XHXN*MTcwOTk1NDQ2NC4zLjEuMTcwOTk1NDQ5MC4wLjAuMA..
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    Lull 644B owners- Whats normal - whats not

    Update - I got the seal kit. Installed it tonight and now I can set the pressure for pump 2. Once I got this set the frame leveling and the fork curl work properly! Does anyone know how to address low steering pressure? The manual tells me what it should be but fails to suggest causes and...
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    Lull 644B owners- Whats normal - whats not

    Mine clearly has 5060 stamped into the side of it. The 4545 does look similar in the pictures online though.
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    Lull 644B owners- Whats normal - whats not

    Someone on a hydraulic cylinder repair facebook group I am in sent me this - which I found helpful. The 51790 part number lead me to this place - https://www.ironwingsales.com/product/husco-seal-kit-55014/ They have the seal kit for 16 dollars. Hopefully its correct. I ordered it, but will be...
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    Lull 644B owners- Whats normal - whats not

    We have a hydraulic sales rep at the plant I work in. I shot him an email this morning asking for some advice. He also suggested Hercules and pointed me to a few seals I can try. I need to measure it and see what they have that might work. I'll report back in case it helps someone else. He also...
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    Lull 644B owners- Whats normal - whats not

    Progress update. - Got my test coupler Friday. Ordered one off Amazon. The damn thing is so far out of tolerance it wouldn't even work until I took it apart and ground some off the front of the sliding collar. It wasn't coming forward far enough to hold the locking ball bearings down and the...
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    Lull 644B owners- Whats normal - whats not

    I'm working off the service manual JLG has on their website. To me it appears to be what they are calling the mid-inlet. My machine is a 644B-42 serial 1136. It looks like the last control valve unit was 207. What I am not seeing in the manual is a nice step by step procedure for setting the...
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    Lull 644B owners- Whats normal - whats not

    Thanks for posting those. I wonder if those exist for my machine. I believe mine is the mid inlet. I have the spools up front and the manifold in the center near the accumulator.
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