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Recent content by Tall.Timber

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    CAT 3.3b DPF removal(No engine removal or cab tilt)

    I cant say for sure but i would think this would work. As much time as it saves it is worth a shot! Let us know if you do!
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    277C Hydraulics bogging engine

    So I took the machine out yesterday with a fresh mind and a better understanding of the how an axial pump like this works. hooked gauges into the load sense port and the pump discharge port. Fired up the machine and saw that the pump discharge was around 750psi and the load sense was 0psi. Ran...
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    277C Hydraulics bogging engine

    I will run the controls a bit more tomorrow with the load sense hooked back up and two pressure gauges at the same time to get a better description of what is happening when another function is used. If i am understanding correctly when i run the machine at any given time I should see the pump...
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    277C Hydraulics bogging engine

    I have an idea that i think might work to help tell what's going on. I plan to leave the load sense input signal disconnected and use a hand hydraulic pump to give this input a little pressure when i try to move the bucket. This should allow me to confirm if it is the hydraulic pump "running...
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    277C Hydraulics bogging engine

    That is correct. It is my understanding of the machine that if there is no input to the controls the pump should not be trying to build this much pressure. So it is possible that the issue is inside of the controls and is sending signal pressure when it should not be? Edit: Confirming question...
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    277C Hydraulics bogging engine

    Is there any reason that the load sense input line coming from the controls would/could be faulty? Just want to make sure i am looking at the right side of this issue.
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    277C Hydraulics bogging engine

    I was out of town for a while so I am just getting back to this and getting to work on it. As stated before I do not see the odd jump in discharge pressure with the load sense disconnected. This seems to me that it is possibly an issue with the load sense valve as stated. I am looking at a parts...
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    277C Hydraulics bogging engine

    I should add also that when running the functions, tilt down, tilt up and lower all could be seen on the pump discharge when initially triggered by a "dip" in the discharge pressure very quickly before the bucket started to move. When raising the bucket this was not seen.
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    277C Hydraulics bogging engine

    I got plugs today and capped the line into the pump fired up the machine and saw around 500 psi standby pressure(seems within spec i was using a 6000 psi gauge so there is some uncertainty). Ran the bucket tilt up and down, and saw no bogging. Went to lift the bucket and found that the bucket...
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    277C Hydraulics bogging engine

    So looking at the schematic and the explanation you sent removing this line should make the pump only run at standby pressure correct? Since the pump will not see input on the load sense circuit it should not attempt to increase pressure to make up for the flow? I purchased the machine in this...
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    277C Hydraulics bogging engine

    I received my pressure test kit today and was able to complete some testing. I think the information I gathered should help in starting to piece together this puzzle. Standby Pressure Test Set gauge on the pump discharge pressure port under the tool control. Fired up the machine and saw 700psi...
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    277C Hydraulics bogging engine

    When I saw "torch" and "shiny" I was 100% certain i was looking for the brass filings to glow under a flame! It must be in my nature to veer to the side of destruction! Planning to run the attached pilot pressure test once I receive the test kit. For now I will be putting away all sources of...
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    277C Hydraulics bogging engine

    I was thinking pilot pressure was a good place to start also. Not sure what pressures i am looking for but my test kit should be here tomorrow so I am going to do some testing on those three ports and see what things look like. I will report back. I also pressed and burned the filter. Filter...
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    277C Hydraulics bogging engine

    I replaced the hydraulic filter this morning cut open the old one and found, what i think is, little to no material in the filter. The photo shown is the most i could find in the ring i cut out of the pleats. I put the new filter in and ran the machine. At all RPMs forward and reverse caused no...
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    277C Hydraulics bogging engine

    Hello, Troubleshooting a 277C S/N:JWF00898. Having an issue where the machine is bogging down when using the lift and tilt cylinders. It seems to be more common when at lower RPM than wide open. Engine bogs, shakes, and drops about 400-600 RPM when this happens. little to no smoke(smoke that is...
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