1. Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!
  2. ALL NEW MEMBERS READ THIS FIRST!! Thank you for joining Heavy Equipment Forums! If you are new to forums we communicate with "Threads", please search our threads to see if your topic may have already been answered and if not then click "Post New Thread" in the appropriate forum. This will allow all of our members to see your question and give you the best chance to be answered. After you've made a number of posts you will graduate to Full Member status where you'll see a few more privileges. Following these guidelines will help make this the best resource for heavy equipment on the net. Thanks for joining us and I hope you enjoy your stay!!

Caterpillar 287 need help with hydraulics- machine moves very slow

Discussion in 'Compact Track/Multi Terrain Loaders' started by jreese7290, Jan 26, 2020.

  1. 92U 3406

    92U 3406 Senior Member

    Joined:
    Jan 3, 2017
    Messages:
    1,728
    Location:
    North of there but east of here
    We just did a couple from major failures. Something like 40+ hours worth of labour on each. Not quick, not cheap. Most components were removed and cleaned, lines pigged etc.
     
    Nige likes this.
  2. Williamsmith

    Williamsmith Member

    Joined:
    Mar 26, 2020
    Messages:
    14
    Location:
    New York
    So the drive pump was determined to be bad
    I will be draining and flushing all pumps to rid of contamination. What is best way to refill fluid to all pumps to avoid starting machine dry and pumping fluid to them? and is there bleeders I need to open to bleed system of air?
     
  3. ih100

    ih100 Senior Member

    Joined:
    Feb 27, 2009
    Messages:
    701
    Location:
    Peterborough UK
    If the pump is “bad” something has failed internally, such as the slipper plate. If the pump isn’t stroking up it won’t be cavitation, so the noise may not be what you think. If the strainer in the tank is clear, it’s a clear path from the tank to the pump, especially as the tank is above the pump. Have you cut the filter open yet? If there’s brass in there, chances are it is a pump failure, as the hystat and implement pumps are about the only place in the system (apart from the motors) with brass components.
     
    Nige likes this.
  4. Nige

    Nige Senior Member

    Joined:
    Jun 22, 2011
    Messages:
    17,499
    Location:
    G..G..G..Granville...........!!
    As IH says, first steps - cut the filter open and look for particles in it. Take photos pf whatever you find.
    Next, remove the screen (#5) from the hydraulic tank and inspect for particles. Again post photos of whatever you find.

    upload_2020-5-1_20-58-29.png
     
    92U 3406 likes this.
  5. Williamsmith

    Williamsmith Member

    Joined:
    Mar 26, 2020
    Messages:
    14
    Location:
    New York
    No photos but lots and lots of brass. Handfuls!
    Determined my hystat pump is bad. Have new, flushed system,
    Is there a proper way to refill system other than fluid in the tank and starting the machine to get it into all pumps
     
  6. Nige

    Nige Senior Member

    Joined:
    Jun 22, 2011
    Messages:
    17,499
    Location:
    G..G..G..Granville...........!!
    If you want the replacement pump to live I think you're going to need to do "a bit more" disassembly.
    Have you removed, disassembled, & cleaned: -
    1. Drive motors
    2. Lift & tilt cylinders
    3. Control valves
    4. All the hoses

    Because everything will be empty on the first start I suggest that you ignore the sight glass on the hydraulic tank and instead fill the tank right to the neck. When you first crank up the engine the oil will disappear from the the tank in the blink of an eye. Filling it right to the top gives you at least a bit of a head start.
     
    92U 3406 and mg2361 like this.
  7. 92U 3406

    92U 3406 Senior Member

    Joined:
    Jan 3, 2017
    Messages:
    1,728
    Location:
    North of there but east of here
    To build off this, the machines we cleaned out went through a filter and a hydraulic oil change after a couple hours of running around the yard and there was still some small pieces of brass and metal in the filter.

    What we did:
    -Cleaned lift cylinders
    -Cleaned tilt cylinders
    -Removed and flushed the reservoir
    -Removed, disassembled and cleaned out the main implement valve
    -Replaced cooler
    -Removed, disassembled and cleaned the ride control valve
    -Pigged out and cleaned out dang near every line on the machine
    -Cleaned out pumps.
    -ISO particle count to verify system cleanliness

    We were in the neighbourhood of 40-45 hours in on each machine.
     
    Nige and mg2361 like this.
  8. Nige

    Nige Senior Member

    Joined:
    Jun 22, 2011
    Messages:
    17,499
    Location:
    G..G..G..Granville...........!!
    All the above - with bells on...........
    That's the most complete description I've seen of how to decontaminate the hydraulic system on a SSL
     
  9. Williamsmith

    Williamsmith Member

    Joined:
    Mar 26, 2020
    Messages:
    14
    Location:
    New York
    Can I use a Traveller iso 46 hydraulic fluid to run through my cat 287b? It says not recommended for final drives. I will be running it for a little while and then changing it to cat hydraulic fluid
     
  10. heymccall

    heymccall Senior Member

    Joined:
    Feb 20, 2007
    Messages:
    2,627
    Location:
    White Oak, Pa
    Were the travel motors also disassembled?
     
  11. 92U 3406

    92U 3406 Senior Member

    Joined:
    Jan 3, 2017
    Messages:
    1,728
    Location:
    North of there but east of here
    Hard to say. There were multiple machines with the same failure. I got pulled off my machine mid-job for something else and another guy completed it. The original plan we weren't. The higher ups reviewed the schematics and determined that since charge flow goes through the filter before entering the hystat system that it was unneccessary. There was nothing in the histogram on that particular machine indicating that the filter had plugged and bypassed.