THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
4-22
Effective: 01/01/2008
A new installed engine requires careful
observation at the initial ground run. Oil
pressure is critical to engine health, so
the oil pressure should read 10 psi
minimum within 30 seconds. If it doesn't,
the engine should be shut down
immediately and an investigation made,
a cause determined and the problem
fixed before attempting another engine
run.
An observer should be located at a safe
distance from the engine to detect any
unusual noise, vibrations, or fluid leakage
during the initial engine ground run.
A. Start and operate engine briefly then
shut down engine and check for fluid
leaks.
B. Restart engine and perform normal
engine operational checks per
Section 2, page 2-8. Refer to Table
4-1 for engine troubleshooting help.
C. Keep in mind an incorrect instrument
reading could be the fault of the
instrument. Refer to Table 8-1 for
instrument troubleshooting help.
Slow oil pressure or fuel pressure
instrument response may be caused
by air in the lines, which will
eventually work its way out.
OIL COOLER
The oil cooler is cooled by ram air flowing
through the fins. Oil under pressure from
the oil pump enters the cooler, passes
through the cooler, and is returned to the
oil tank. A thermostatically operated oil
cooler bypass valve allows oil to bypass
the cooler in the event of congealed oil or
an obstruction in the cooler.
OIL COOLER REMOVAL
To remove oil cooler, proceed as follows:
A. Disconnect and cap oil inlet and
outlet line.
B. Support oil cooler, remove nuts and
washers from bolts through-bolts
attaching air cooler to mounting
brackets.
*NOTE*
The oil cooler will be full of
oil, so be careful to drain it
into a disposal container.
OIL COOLER INSTALLATION
To install oil cooler, proceed as follows:
A. Support oil cooler in place, install
through-bolts, nuts and washers.
B. Connect oil inlet and outlet lines.
C. Service oil system as required.
ENGINE MOUNT
The engine mount (see Figure 4-9) is a
tubular type, stress relieved after
welding. The mount has four hard attach
points to the fuselage structure. The
engine is supported from the rigid mount
by four vibration insulators.
ENGINE CONTROLS
A control quadrant (see Figure 4-10)
mounted on the left-hand side of the
cockpit incorporates the throttle, mixture
and propeller control levers. The
propeller control is actuated through a
flexible cable type control and the throttle
and mixture controls through a system of
push-pull rods and bellcranks. The
carburetor heat control is mounted on the
left-hand brake master cylinder bracket
and is actuated by a flexible cable type
control.
RIGGING
The linkage is to be adjusted so that full
movement of quadrant lever produces
full movement between lever stops on
engine. The throttle, mixture and
propeller controls should be rigged to
have a minimum cushion as follows:
A. Throttle control 0.06 inch minimum
on aft side (in closed position).
B. Mixture control 0.06 inch minimum
on forward side (in open position).
