TM 5-4320-300-14
Table 4-1 Organizational Preventive Maintenance Checks and Services - Continued
W -Weekly
Q- Quarterly
M -Monthly
S- Semiannually
Interval
Item
Item
To Be
No. W M Q S
Inspected
Procedures
Start engine and allow it to warm up. While engine is warm-
ing up, make an alinement mark on the governor body and
cap. Loosen the adjusting lock screws on the governor cap
just enough to allow the cap to be rotated either direction.
Raise the engine speed with the throttle control to the
maximum rpm allowed by the mechanical governor.
Care-
fully and slowly rotate clockwise the cap of the overspeed
governor. When the lowering trip speed of the governor
matches the actual engine speed, the overspeed governor will
shut down the engine.
If the overspeed governor does not shut down the engine
when it is rotated fully clockwise, the mechanical governor
will have to be adjusted in order to increase the engine
speed.
Release the jam nut, mark the position of the maximum
speed adjusting screw, and turn the adjusting screw to in-
crease the engine speed.
If the overspeed governor does not
trip after raising engine speed with maximum speed adjusting
screw, notify direct support maintenance.
Return the maximum speed adjusting screw to its original
position and tighten jam nut. Return overspeed governor cap
to original marked position and tighten the adjusting lock
screws.
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