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    Boom lift Drive Wheels torque fade

    I'm not sure what you are asking. A spec.? Whenever I draw the boom extension cylinder all the way closed and hold it in that position the gauge on the main valve body will reach 2400 psi or so. When I hold the drive lever in either forward or reverse, with wheel motors plumbed up or with lines...
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    Boom lift Drive Wheels torque fade

    Yes, I blocked the lines going that go into the motors after the block in the previous picture. Same pressure readings, 2100 psi. forward or reverse.
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    Boom lift Drive Wheels torque fade

    Yes, thank you TVA, there is one on the other side. Here is a picture.
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    Boom lift Drive Wheels torque fade

    What would change with an adjustment to this piece?
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    Boom lift Drive Wheels torque fade

    You know Ron, with all I've done I lost track of the order in which I did things and the result of each. I may even have an intermittent problem. Right now it's better than it's been but I'm not convinced it's at it's potential. The manual and that I.D. plate on the rear of the machine both say...
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    Boom lift Drive Wheels torque fade

    Here is a link to a video showing the vent-oil off the two wheel motors of a Marklift 62. The left motor seems to exhaust/vent more but after a bit the right one will produce more. After the test the two buckets held the same amount. During this test both the gauge on the main of the...
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    Boom lift Drive Wheels torque fade

    Here's where I'm at with this Marklift 62. All functions except "drive" work as I feel they should. I have movement in the "low" range that is consistent now from a few minutes after cold-start until 30 minutes or so after (that's as long as I've run it). It would always fail minutes after...
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    Boom lift Drive Wheels torque fade

    This is the correct diagram for the 1986 Marklift that I'm working on for my friend. Also, the correct hose kit diagram.
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    Boom lift Drive Wheels torque fade

    Thanks TVA. In my case wouldn't the gauge that I've got installed on the main pressure line coming into my valve bank also show low pressure if one of the motors or both are loosing/leaking oil?
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    Boom lift Drive Wheels torque fade

    Where is this block located on your machine?
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    Boom lift Drive Wheels torque fade

    I have a pressure gauge on main line pressure on the valve bank. I also have a gauge on the line where the hose to one of the wheel motors comes out of the flow divider in back. I can get 2400 lbs showing on the main gauge and only like 1400 on the gauge at the wheel motor hose. Not sure what to...
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    Boom lift Drive Wheels torque fade

    I meant that I did swap out the coils which are held in by the allens. They use voltage to send pilot oil to the covers just above the coils (held by allens also) and their corresponding covers on the back of the valve bank. The pilot oil pressure pushes the main spool back and forth.
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    Marklift CH60C drive problems

    What did you find for problems? It may help me with my Marklift 62.
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    Hydraulic lines in boom access

    these are the actual basket leveling cylinders. Once you get your basket set level at ground level, as you raise the main boom these two cylinders will transfer oil to the basket cylinder to keep your basket level to the ground even though the boom angle increases.
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    Boom lift Hillside operation

    in the Marklift manual is states that proper operation is with the counter-weight over the drive wheels
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    Air in hydraulic pump at lines

    How did you get the screen out of the tank?
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    Boom lift Drive Wheels torque fade

    can you get me a picture of what you thought was your pressure regulator but taken from a little further away showing more hose and surrounding features?
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    Boom lift Drive Wheels torque fade

    Looking at the hydraulic schematic of the proportional valve bank, it looks like each spool has it's own pressure regulator. I'm going to check this out soon as I can.
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    Boom lift Drive Wheels torque fade

    Yes, they both have planetary gears. I have not had them apart. I have had the brake off my right side while the wheel motor was out. To get the spline to line back up when putting the brake unit back into the planet hub I had to turn the cap around to depress the pin in the middle so I could...
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    Boom lift Drive Wheels torque fade

    Hello Ronray, I have a friend's Marklift 62 that I'm helping him with and we are having the same wheel motor/drive problems (it seems). I sent one wheel motor away to be checked out and was told that there wasn't anything wrong that would keep it from working. They replaced a bearing and the...
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