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cat 428D no power steering

niamek ยท 2022-10-01 07:57

i got cat 428D backhoe 2003 BMT02630 and now sometimes my power steering not working. 80% times not working, espacially with full front bucket, tires are ok, sometimes it comes back when i lift/make a move up or down front bucket. friend told me it might be a hydraulic pump, but other hydraulic systems work just fine, or priority valve / seal o ring but what excatly and where is it ? or sealing in cylinder under front axle, the one for turning... any suggestions how to chceck it/diagnose it, ?

Replies5
  1. #1heymccall2022-10-01 09:00

    I'm gonna start you with one word to search under Tractor/ Loader/ Backhoe....... "Resolver"

  2. #2Nige2022-10-01 09:55

    There are multiple threads in this section of HEF regarding resealing the resolver (shuttle) valves in Cat backhoe loader hydraulic systems. Each individual section of the control valve has two of them.

  3. #3Tinkerer2022-10-01 10:49

    Here is one of them. HeavyEquipmentForums

  4. #4niamek2023-05-08 15:55

    Is there a way how i can diagnose if its steering cylinder seals ?

  5. #5Welder Dave2023-05-08 16:17

    If the steering works sometimes it's not likely a cylinder issue.