Woodward UG-10 Dial, Installation And Operation Manual, Page: 38 / 62

UG Dial Governor Manual 03040
32 Woodward
Table 5-2. Governor Output Shaft Travel vs Butterfly Valve Travel
Governor Output
Shaft Travel
0°
6°
12°
15°
18°
24°
Butterfly Valve
Shaft Travel
0°
3°
9°
20°
30°
82°
Governor Field Repairs
Seals and bearings of the governor output shaft and drive shaft can be replaced
in the field.
Seals and bearing replacement require only a partial disassembly of the
governor. See Figures 5-1 and 5-2, and tables 5-3 and 5-4, for a list of common
bench tools and normal field repair tools.
Seals and bearings can be replaced without these tools, however replacement of
parts is made easier if these tools are available.
Order tools from Woodward (see Chapter 8, Service Options). Include in order:
1.
The tool description
2. The tool number or part number of the tool required
3. The manual number (this manual 03040)
Removal of Governor from Engine
To replace a governor on the engine, or to replace seals or bearings on the
governor, remove the governor from the engine as follows:
Use care in handling and resting of the governor on the work area.
Do not strike or rest the governor on the end of the drive shaft as
damage may result to the drive shaft, oil seal, bearing, or other
internal parts or surfaces. Set the governor on wooden block(s) to
protect the drive shaft when performing maintenance operations.
1.
Drain the oil from the governor and install the drain plug again. Some
governors are equipped with a drain cock for draining.
2.
Clean exterior surfaces using a cloth moistened with cleaning solvent.
3.
Disconnect auxiliary device wiring, and pneumatic or hydraulic tubing
connections if applicable.
4.
Before detaching the output shaft and speed setting linkages, mark both
shaft and lever so they may be easily reinstalled at their original positions.
5.
Remove the four stud nuts holding the governor to the mounting pad and lift
the governor off. Remove the gasket between the governor and governor
mounting pad.