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  1. T

    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!
  2. T

    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.
  9. T

    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...
  10. T

    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...
  11. T

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

    With the DPF moving free and most obstructions out of my way, I began trying to remove the DPF. I kept running into pinch points and after 15 minutes i decided that a new approach would be needed. I opted to split the DPF in the machine and remove it in pieces. I started on the inlet side of the...
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    CAT 3.3b DPF removal(No engine removal or cab tilt)

    Hi all, I recently had to remove the DPF from my 277d and was reading horror stories about the process. Some said to remove the motor. Others suggested tilting the cab and going in from the plate with hydraulics. I figured there had to be a way around this. The following is how I was able to...
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    CAT 277d DPF code

    So last weekend I got the DPF out. Took it apart for cleaning and it was PACKED with ash. blew it out with an air compressor for around 30 minutes then pressure washed it with a hot washer until my water ran clear. I cannot believe how much ash was in that DPF and DOC. once done i let it dry...
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    CAT 277d DPF code

    I am not entirely sure, turbo failed and was replaced prior to my ownership. I can only assume it put oil to the DPF. Did a little more digging today. Took out the Delta P sensor and hooked a longer hose to the pipes. Blew into them by mouth to feel for any obstruction(I dont think this...
  20. T

    Cat 257b, had lights on dash, turn key, now nothing.

    Sounds like a text book bad connection somewhere on that 12V wire to the key. TINY connection is made at the bad point which allows just enough electrons to show 8V on a meter. but when you try to use that power it reads 0V. Start following that wire backwards and check voltage at any points...
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