THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
Effective: 01/01/2008
4-19
soon as oil pressure is indicated, move
the control to the high RPM position. If
the propeller does not respond, shut
down the engine immediately and check
the propeller and governor. If operation
is satisfactory, warm up engine, and after
completion of warm up period, advance
throttle to some intermediate position (65
to 70 percent of normal rated) engine
speed. Move the propeller control
several times between the minimum and
maximum settings, and check to see that
the propeller and governor function
properly. Finally, move the control to the
high RPM position and make the
customary check of engine manifold
pressure against engine RPM. (In some
installations it is impossible to obtain
take-off RPM on the blocks with take-off
manifold pressure.)
A. Set the manifold pressure equal to
the field barometric pressure (static
manifold pressure gage reading) with
the propeller on the low pitch stop
and note the RPM.
B.
The RPM noted should be
approximately 2000 RPM, depending
on the propeller and its low pitch
stop setting.
ENGINE CHANGE
ENGINE REMOVAL
The engine mount can be removed with
the engine as desired, however, in the
following instructions the engine is being
removed from the mount. If the engine is
being returned to the manufacturer or will
not be operated within a seven day
period comply with storage instructions
contained in Section 2.
A. Close fuel shutoff valve and be sure
ignition and battery switches are
OFF.
B. Remove propeller (see Propeller
Removal instructions in this section).
C. Remove engine accessory cowling
(see Figure 4-8).
Residual fuel and oil draining
from lines and fittings
constitutes a fire hazard.
Observe all standard safety
precautions.
WARNING
D. Drain
engine oil.
E. Drain carburetor fuel filter.
F. Disconnect and cap oil inlet, outlet
and vapor return and drain lines.
G. Disconnect and cap fuel inlet, outlet,
return and drain lines.
H. Disconnect fuel primer lines as
applicable.
I. Disconnect electrical leads from
generator/alternator, starter,
magnetos, and other electrical
connectors as required. Tag
electrical leads for identification
purposes.
J. Remove bolts from bottom of
carburetor (see Figure 4-4) to
carburetor air box adapter. Remove
adapter.
K. Disconnect governor control linkage;
remove linkage control mounting
brackets as required for engine
removal.
L. Disconnect all carburetor control
linkage.
M.
Disconnect fuel pressure, oil
pressure, manifold pressure and oil
temperature connections.
Disconnect tachometer connection.
N. Attach engine hoist and raise engine
slightly, to relieve weight from engine
mount attach bolts.
CAUTION
Raising engine too high will
place a strain on attach bolts
and hinder bolt removal.
O. Check engine to ensure that all items
attaching engine and accessories to
airframe are disconnected.
P. Remove engine mount attach bolts.
Q. Remove engine from airframe.
