Page 434 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

412 Major Process Equipment Maintenance and Repair

Governor Maintenance (Refer to Figure 8-20)

Routine Maintenance
Because of the simplicity of the TG-10 Governor System, a minimum
of maintenance is required. The following checks should be made:

1. Check the governor oil level daily.
2. Frequently sample the governor oil. Change oil if the sample shows
signs of contamination.
3. Check the governor linkage for binding, excessive play and loose
bolts, jam nuts or set screws.
4. Keep the linkage clean and well lubricated with a high temperature,
water resistant silicone grease.

Governor Disassembly

Internal governor maintenance is not recommended. It is advisable to
replace the governor if defective. If the governor must be dismantled in
the field, Woodward Bulletin 04041 should be requested. This Bulletin
lists all special tools and replacement parts necessary for making repairs
to the TG-10 governor.

Governor Removal (Refer to Figure 8-20)
1. Disconnect the adjustable connecting rod (15) from the terminal
shaft lever (17) by removing elastic stop nut (19) from shoulder
screw (13).
2. Loosen socket head cap screw (18) on the terminal shaft lever (17)
and slide the lever off the terminal shaft.
3. Remove the four cap screws (4) which secure the governor (2) to
the adapter (1) and remove the governor from the adapter.
4. Loosen the coupling flange set screws and remove the flange and
key (5) from the governor driveshaft. (See Coupling Detail, Figure
8-20).
5. Remove the steam end bearing cap as outlined earlier, and remove
the adapter (1) by lifting it out of the groove in the steam end bear-
ing housing.
6. Remove the coupling sleeve from the trip body coupling flange.
7. Loosen the coupling flange set screws to remove the flange and key
(5) from the trip body (See Coupling Detail, Figure 8-20).