Woodward 8251-212 UG 2 MPU Actuator
CLOCKWISE MPU DRIVE · DOUBLE-LIP DRIVE SEAL
Product Introduction
Product identityWoodward 8251-212 is an UG 2 MPU actuator record for a clockwise magnetic pickup arrangement. It identifies the actuator and drive-seal configuration used at the governor or control assembly interface.
The Woodward 8251-212 record is therefore tied to the mechanical drive direction and the double-lip drive seal shown by the part designation. The actuator connection, shaft path and seal arrangement must remain together when the unit is fitted.
Technical Information
Verified data| Technical item | Value |
|---|---|
| Brand | Woodward |
| Product type | UG 2 MPU actuator |
| Model | 8251-212 |
| Drive direction | Clockwise |
| Seal arrangement | Double-lip drive seal |
| Mechanical interface | Governor/MPU drive assembly |
| Record boundary | Complete part number identifies the configuration |
| Installation focus | Drive direction and seal seating |
| Signal role | Magnetic pickup actuator path |
Product Functions
Product focusThe actuator role in Woodward 8251-212 is mechanical: it transfers the configured MPU drive motion through the specified seal arrangement. The mechanical output is defined by the specified shaft direction and seal boundary.
Woodward 8251-212 carries the MPU drive motion through its clockwise drive path. The shaft direction and seal are part of the same mechanical drive record.
The double-lip seal belongs to the actuator record and must remain seated at the drive boundary. The seal remains at the actuator housing boundary while the shaft carries the drive motion.
The actuator is installed as part of the governor-side MPU assembly, not as a free-standing electrical input. The governor-side coupling receives movement from the actuator output.
Woodward 8251-212 keeps the actuator shaft, governor coupling and seal as one mechanical drive boundary. The complete 8251-212 number keeps the drive variant tied to the installed assembly.
Installation Highlights
Integration focusWoodward 8251-212 is installed by matching the drive direction, shaft engagement and seal position at the mechanical interface. The installation check is about mechanical alignment and travel, not an electrical setting.
Align the clockwise drive direction before coupling the actuator to the governor mechanism. The clockwise designation must agree with the driven governor orientation.
Check the double-lip seal at the housing boundary before tightening the assembly. Seal seating affects the mechanical boundary around the shaft.
Verify that the connected drive can complete its intended movement without binding. Travel is checked after coupling so the actuator is not judged independently of the linkage.
Woodward 8251-212 must reach the connected governor coupling without side loading the sealed shaft. The coupling check confirms that the recorded actuator variant is mechanically usable.
Frequently Asked Questions
Field questionsWhich direction belongs to Woodward 8251-212?
When configuring Woodward 8251-212, use the clockwise drive orientation identified by the complete part number. Confirm shaft direction at the connected governor before coupling the actuator.
Can the seal on Woodward 8251-212 be treated as a separate option?
No. In Woodward 8251-212, the double-lip drive seal is part of the 8251-212 configuration. Record the seal arrangement with the actuator number when checking the assembly.
What should be checked if Woodward 8251-212 binds after installation?
For the Woodward 8251-212 record, separate shaft alignment from seal friction and travel limits. Check coupling alignment first, then confirm the seal is seated without loading the drive shaft.
Is Woodward 8251-212 an electrical signal module?
No. Woodward 8251-212 identifies a mechanical MPU actuator path. The electrical sensing circuit remains a separate part of the connected system.
What record is needed before replacing Woodward 8251-212?
During checks on Woodward 8251-212, record the complete number, clockwise direction and double-lip seal detail. A generic UG 2 label does not capture the mechanical variant.
How should Woodward 8251-212 be verified during commissioning?
In Woodward 8251-212, verify shaft rotation, engagement and free movement with the actuator disconnected from load, then repeat the check after coupling. This separates actuator fit from driven-mechanism resistance.
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