MQ Power DCA25SSIU2 — Overseas Tier II Engine Speed Reduction for 50 Hz
Adjustments · injection pump governor (engine speed adjustment screw and jam nut)
For the MQ Power DCA25SSIU2, from the MQ Power service manual.
Applies to: MQ Power DCA25SSIU2
Before you start
- FOR USE ON OVERSEAS UNITS ONLY
- UNIT WILL BE DERATED AFTER ADJUSTMENT
- A QUALIFIED ELECTRICAL TECHNICIAN MUST MAKE ALL ADJUSTMENTS. MQ POWER IS NOT RESPONSIBLE FOR ANY DAMAGES TO EQUIPMENT AND/OR COMPONENTS RESULTANT FROM UNQUALIFIED PERSONNEL.
Procedure
- Locate the engine speed adjustment screw and jam nut on the injection pump governor housing (Figure 1).
- Loosen the jam nut of the engine speed adjustment screw by turning the jam nut counter clockwise approximately three (3) turns (Figure 2).
- Start and run the engine using the normal starting procedures.
- While observing the engine speed and the frequency, turn the engine speed adjustment screw counter clockwise until the proper frequency is achieved.
- Maintain position on the engine speed adjustment screw and tighten the jam nut by turning the jam nut clockwise until tight (Figure 3).
- Should any adjustment errors occur, verify frequency and adjust as needed by following Steps 1 thru 5.
Specs & values
- Lower engine speed from standard 62 Hz to 52 Hertz to achieve 50 Hertz operation
- Loosen jam nut counter clockwise approximately three (3) turns
Source: MQ Power 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.