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Home›Repair guides›Military MEP›Voltage Adjust Potentiometer Testing

Military MEP MEP-804A — Voltage Adjust Potentiometer Testing

Testing & diagnosis

For the Military MEP MEP-804A, from the Military MEP service manual.

Applies to: Military MEP MEP-804A

Before you start

  • High voltage is produced when generator set is in operation; shut down before maintenance.

Procedure

  1. Remove VOLTAGE adjust potentiometer.
  2. Set multimeter for ohms across two outer terminals.
  3. Rotate potentiometer shaft counterclockwise as far as it will go.
  4. Connect multimeter between center terminal and either outer terminal.
  5. Rotate shaft clockwise at an even rate while observing multimeter.
  6. Replace potentiometer if indication changes erratically or does not reach maximum ohms.

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

  • 10,000 ohms (RV4NAYSD103A) or 20,000 ohms (RV4NAYSD203A).

Full service-parts list: Military MEP MEP-804A →

Source: Military MEP service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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