Figure 4-28. Engine overspeed governor related parts, exploded view.

Tachometer shaft

6. Governor arm

Tachometer-hourmeter

7. Nut

Adapter

8. Lock washer

Ground lead

9. Adapter

Overspeed governor

10. Governor drive shaft

Figure 4-28. Engine overspeed governor related parts, exploded view.

personnel and property. Do not use near

(2)

Remove the tachometer-hourmeter (2)

open flame or excessive heat. Flash point of

from the control panel.

solvent is 100 o to 138 F (38 to 59 0 C).

(3) Use an open-end wrench to remove the

adapter (3)

from the overspeed governor drive

(1)

Wipe the exterior of the tachometer-

mechanism.

hourmeter and the tachometer shaft with a cloth

b. Cleaning and Inspection.

dampened with dry cleaning solvent (fed. spec. P- D-

WARNING

680).

Clean all parts in a well-ventilated area.

(2) Wash the adapter with cleaning solvent.

Avoid inhalation of solvent fumes and

Dislodge all hardened and caked grease from the

prolonged exposure of skin to cleaning

adapter.

solvent. Wash exposed skin thoroughly. Dry

(3)

Inspect the tachometer-hourmeter for

cleaning solvent (fed. spec. P-D-680) used to

broken dial glass, defaced or illegible dial

clean parts is potentially dangerous to

4-48