Change 19 5-13
Do not attempt to open a clogged screen
with a sharp instrument.
Clean filter assembly parts ultrasonically if
equipment is available. If equipment is not available, agi-
tate parts in solvent (item 3, table 2-2). Dry parts using
clean shop air regulated to approximately 15 psig. Air
pressure should be applied to the exterior of the strainer.
Repeat the procedure if visual inspection with a bright
light shows that the interior of the strainer is not entirely
free of contaminates.
Be sure strainer (8) is installed as shown
in figure 5-8. Open end of strainer toward
the outside of the control, away from the
spring. Do not install backwards.
Install strainer (8), spring (9), and washer
(10) in filter sleeve (5). Secure components in the filter
sleeve with spring pin (6) and retaining clip (7).
Use extreme care to insure that the pneu-
matic lines and fittings are not leaking. Er-
roneous pressures will cause fuel control
Lightly lubricate a new preformed packing (2)
with engine fuel and place it on plug (1). Install filter
assembly (4), spring (3) and plug (1) in fuel control.
Tighten the plug 65-70 in. lb and lockwire (item 10, table
5-13. Power Turbine Governor.
Before replacing the power turbine governor
to correct an engine malfunction, ensure that
the pneumatic tubes and fittings are not leak-
ing and the double check valve is functioning
properly. A malfunction which appears to be
a governor malfunction may be caused by
Remove the self-locking nut and remove the
lever from the governor (10, figure 5-2).
Remove air tube (11) between the Pc filter
(12) and governor tee.
Remove air tube (5) between the governor
tee and fuel control.
Remove air tube (7) between the governor
and fuel control.
Remove air hose (6) between the governor
and accumulator (1).
Remove air tube (9) between the governor
Remove three self-locking nuts (19, figure
5-3) and washers (20) securing the governor to the gear-
box. Remove the governor from the mounting studs.
Coat the governor drive shaft splines with
lubricant (item 14, table 2-2) and the studs with anti-
seize compound (item 15, table 2-2) . Do not lubricate
Install the governor on the mounting pad
studs. Make certain the governor drive splines are prop-
erly engaged in the gearbox drive splines; the governor
must be flush against the gearbox mounting pad. Secure
the governor with three washers (20, figure 5-3) and
self-locking nuts (19). Tighten the nuts to 70-85 in. lb.
Install air tube 19, figure 5-2) between the
control and the governor. Tighten the coupling nuts to
80-120 in. lb.
Install air hose (6) between the governor and
accumulator (1). Tighten the coupling nuts to 80-120 in.
Install air tube (7) between the governor and
control. Tighten the coupling nuts to 80-120 in. lb. Tighten
elbow jam nut to 55-80 in. lb.
Install air tube (5) between the governor tee
and the control. Tighten coupling nuts to 80-120 in. lb.
Tighten the tee jam nut to 55-80 in. lb.
Install air tube (11) between Pc filter, (12) and
governor tee. Tighten the coupling nuts to 80-120 in. lb.
Perform a fuel system pneumatic leak check.
(Refer to paragraph 5-8.)
(10) Install the governor lever on the governor
shaft and position approximately 90 degrees to the cent-
erline of the indicator on the stop assembly. Secure the
lever with the self-locking nut. Tighten the nut to 40-50 in.
lb. (Overtorquing will cause binding of the lever shaft.)