Heavy Equipment Forums Heavy Equipment Community

circuit diagram of engine control unit of SH225X-3B

taiman · 2026-03-17 08:24

i own a SH225X-3B. one day, it just kept at idle speed even if i turn the power to maximum. my mechanics find out it is the engine control unit problem. there is damage in certain components. after i find someone to repair it, i can adjust the power normally. However, there is another problem. the three cylinder (bucket,arm,boom) are so slow.my mechanics want to learn about the circuit diagram of the engine control unit.so anyone have it? or the service manual for SH225X-3B

Replies5
  1. #1Simon C2026-03-17 10:04

    What make of machine is it, and what is the serial number.? Simon C

  2. #2LACHAU2026-03-17 11:46

    Hi bro, It's a Sumitomo excavator short tail type, with a minimum swing radius. Their Hydraulic and Electric system is equivalent to SH200-5.

  3. #3taiman2026-03-17 19:53

    SH225X-3B-SMT225X3P00BH7272 it is the serial number

  4. #4taiman2026-03-17 20:05

    i have a sh200-5, but their engine control unit is different

  5. #5LACHAU2026-03-17 23:33

    All right. You try these schematic diagrams and hope that they're right. Due to the fact that the CASE and Link-belt excavators are essentially Sumitomo excavators.