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prv

  1. M

    Cat E120B Pressure Reducing Valve / Overall Operating Force

    I have been tasked with repairing a 1994 Cat E120B. The machine bogs down when moving heavy loads and the swivel is a bit too fast. The controller displayed the following lights: L1 L4 L7 on steady, L6 blinking. Operating under the assumption the pressure reducing valve was the culprit I ran...
    • Machinist
    • Thread
    • e120 e120b operating force pressure regulating valve prv
    • Replies: 5
    • Forum: Excavators
  2. B

    320B Speed sensor calibration problems

    Hi all, First time posting in the forum. Read a lot on here and learned a ton, really appreciate everyones tips and advice. Im just getting into machines out here in Hawaii and learning a lot from everyone I can. Have a 320b that having trouble with the speed sensor calibration. The old...
    • bcole4
    • Thread
    • 320b calibration flywheel monitor prv speed sensor
    • Replies: 11
    • Forum: Excavators
  3. R

    PRV Calibration for Cat 317N excav.

    Hi all. I have this 317N Cat excavator who's giving me a hard time on troubleshooting the hydraulic system. The problem is that on some hydraulic circuits, the hydraulic pump stalls the engine, such as the under carriage, and boom lift cylinders, while on the other circuit such as the bucket...
    • Rodgale
    • Thread
    • calibration cat excavator power prv stalls
    • Replies: 4
    • Forum: Excavators
  4. Shterion Kostov

    CAT 320C low hydraulic power, engine stalling

    Hi, Guys! I have been having a lot of trouble with a CAT 320C Excavator (S/N BDE00683) with 16 000 hours on the clock, which my boss just bought. The excavator is well serviced, engine looks and works well, but when under load, the engine revs go down very fast, it stalls and there is no...
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