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Something simple to something MAJOR.

Discussion in 'Skid Steers' started by Vetech63, May 18, 2019.

  1. Vetech63

    Vetech63 Senior Member

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    I was called out on a CAT 299D (GTC01960) today because the engine overheated. When I got there I realized quickly that the hydraulic cooling fan was not working at all. After verifying the electrical was working correctly I went on to a hydraulic problem. I pulled the solenoid valve on the fan motor to find this...……. CAT299D-1.jpg
    …….a nice sized sliver of metal wedged in the port hole.
     
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  2. Vetech63

    Vetech63 Senior Member

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    I noticed that the way this machine is plumbed, the tool pump goes straight into the fan drive motor and the hydraulic filter is on the return side of the fan motor. My deduction is the sliver came from either the tool pump or the fan motor itself. Here is another pic of this piece of metal still stuck in the valve. CAT299D-2.jpg
     
  3. Ronsii

    Ronsii Senior Member

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    Could be from manufacturing.... just something that didn't come loose in the deburring/cleaning stage... maybe....

    Oh!!!, that is pretty good sized... couldn't tell from the first pic.
     
  4. Vetech63

    Vetech63 Senior Member

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    I decide to start at the fan motor so I pull and disassemble it. Looks brand new and barely a scratch. Off I go to pull the tool pump which I notice has a common suction with the implement pump it is bolted to. Tear down the tool pump to find damage on the suction side of the gear housing, but NOT the size of the sliver in the solenoid valve. So now I have to pull the implement pump and inspect it. The source of this sliver has to be found...……….
     
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  5. Vetech63

    Vetech63 Senior Member

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    CAT299D-3.jpg
    Ahh...…..slipper damage, but not the source of my sliver.
     
  6. CM1995

    CM1995 Super Moderator

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    Yikes. I have a 2016 279D, are they plumbed the same as the 299?
     
  7. Vetech63

    Vetech63 Senior Member

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    CAT299D-4.jpg
    still no steel.
     
  8. Vetech63

    Vetech63 Senior Member

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    CAT299D-5.jpg
    Pump tag...……..in case any of you are wondering LOL...…….still searching!
     
  9. Ronsii

    Ronsii Senior Member

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    Any chance someone else worked on this a bit earlier and maybe took hoses off???
     
  10. Vetech63

    Vetech63 Senior Member

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    DAM! Guess what!? ……...FOUND IT!!!! CAT299D-6.jpg
    The barrel on the swash plate piston exploded. The contamination seems to be limited to the case drain side of the system but because of the flow design of the system, one pump killed another and would have killed the fan drive motor had that sliver not got hung up and caused the engine to overheat. NOW FOR THE GRAND FINALE>>>>>>>>>>>
     
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  11. rondig

    rondig Senior Member

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    Could it be spool or spool seat material..in pics it looks like round edge.
     
  12. Ronsii

    Ronsii Senior Member

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    Wow!!!! yep.... looks like that *could* be the culprit ;)
     
  13. rondig

    rondig Senior Member

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    Holy crap that is a problem...expensive one
     
  14. Vetech63

    Vetech63 Senior Member

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    >>>>>>I found out today from REXROTH themselves that they have discontinued this pump and no rebuild parts , or complete pumps (new or remaned) will be offered. NO PARTS PEOPLE...….AT ALL. Once Cat's inventory on these is exhausted, your screwed!!!! They are offering NO REPLACEMENT either.This machine has 4288 hours. This is original equipment and has never been into before today. BUYER BEWARE ON THESE......and they are used in several models of skid steers.
     
  15. Vetech63

    Vetech63 Senior Member

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    NEW pump from CAT...……..$2700.00( just for the implement pump). Tool pump.....$1100.00. Fan drive motor is $500.00(which I am going to replace anyway if I am going to warranty this. Will be here Monday...……..who knows how many are left??

    What I thought was going to be a quick fix, in and out...……….turns into a 7-9K job in 4 hours time.
     
  16. rondig

    rondig Senior Member

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    A22vg...is being replaced by a24vg but it will not be direct replacement..can be modded to fit though...if you order right code...unfortunately proprietary rights make it difficult to match up.
     
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  17. Vetech63

    Vetech63 Senior Member

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    Yep
     
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  18. Vetech63

    Vetech63 Senior Member

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    The proprietary is the killer here.
     
  19. Vetech63

    Vetech63 Senior Member

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    Funny thing is...…….My CAT product support guy just mumbling "UHHHH...…..well...……..UHHHH" when I questioned him about this pump...…..was priceless. This is the 3rd CAT skid steer I have had a pump failure on in the last 3 years.
     
  20. rondig

    rondig Senior Member

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    When we rebuilt them for rexroth cavitation was always the result they gave us for this type of failure...cavitation hammers the pistons...we have rebuilt tons of a22vg pumps over the years. You are right though....nh, case, cat...actually most companies used the now obsolete pump....the a24 vg we have in stock is 1 inch longer than a a22vg...but charge relief and and main reliefs are a little different. Big difference is on the controllers.....but the automotive controls will be way better on a24....also the 4-24 mil range will be way more precise... ouch 2700 usd...is crazy....