2735 (518372.06) - DEC

Case IH 2735 (518372.06) - DEC – DEC: HST CutOff solenoid - LSD short to HSD

Issue description

Indicates an electrical fault—specifically, a short circuit between the Low Side Driver (LSD) and the High Side Driver (HSD) on the circuit controlling the Hydrostatic Transmission (HST) CutOff solenoid.

Applies to these machines

  • VESTRUM CVX
  • Case IH Compact Tractors
  • Farmall 40B
  • Farmall 45B
  • Farmall 50B
  • Farmall 40
  • Farmall 45
  • Farmall 50
  • Farmall 55
  • DX40
  • DX55

Check the cause

  1. Check the wiring harness between the DEC and the HST CutOff solenoid for melted insulation or rubbed wires

  2. Inspect the HST CutOff solenoid for internal failure causing a short between the low-side ground circuit and the high-side power circuit

Parts you might need

(2)
  • HST CutOff Solenoid

    SBA185206085

    Example fitment for Case IH Farmall HST/CVT compact tractors. Replaces older part numbers like 87780758, 328605A1, and 281552A1.

  • Transmission Control Solenoid

    Generic part name if exact OEM part number is unverified.

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