Cessna 150 Series Service Manual page 134

11-12. CLEANING. The engine may be cleaned with
11-15. ENGINE BUILD-UP.
Engine build-up con-
a suitable solvent, such as Stoddard solvent, or equiv-
sists of installation of parts, accessories and com-
alent, then dried thoroughly.
ponents to the basic engine to build-up an engine unit
ready for installation on the aircraft.
All safety wire,
CAUTION lockwashers, eleastic stop nuts, gaskets and rubber
connections should be new parts.
Particular care should be given to elec-
trical equipment before cleaning.
Sol- 11-16. INSTALLATION. Before installing the en-
vent should not be allowed to enter mag-
gine on the aircraft, install any items that were re-
netos, starter, alternator, and the like.
moved from the engine after it was removed from the
Hence, protect these components before
aircraft.
saturating the engine with solvent.
Cover
any fuel, oil and air openings on the en-
NOTE
gine and accessories before washing the
engine with solvent. Caustic cleaning
Remove all protective covers, plugs, caps
solutions should not be used. and identification tags as each item is con-
nected or installed.
11-13. ACCESSORIES REMOVAL.
Removal of en-
gine accessories for overhaul or for engine replace-
a. Hoist engine assembly to a point near the engine
ment involves stripping the engine of parts, acces-
mount.
sories, and components to reduce the engine assem-
b. Route controls, lines and hose in place as the
bly to the bare engine. During removal, carefully
engine is positioned near the engine mount.
examine removed items and tag defective parts for
c. Install shock-mounts as shown in figure 11-2 and
repair or replacement with a new part.
install engine-to-mount bolts. Be sure ground straps
are in place at lower engine mount. Tighten engine-
NOTE
to-mount bolts to torque value shown in figure 11-2.
d. Remove hoist and stand placed under tail tie-
Items easily confused with similar items
down fitting.
should be tagged to provide a means of
e. Route throttle and mixture controls to the car-
identification when being installed on a buretor and connect, using washers and spacers as
new engine. All openings exposed by the noted in step "g" of paragraph 11-11.
removal of an item should be closed by
installing a suitable cover or cap over
NOTE
the opening.
This will prevent entry of
foreign particles. If suitable covers are
Throughout the aircraft fuel system, from
not available, tape may be used to cover
the fuel tanks to the carburetor, use NS-40
the opening.
(RAS-4) (Snap-On Tools Corp., Kenosha,
Wisconsin), MIL-T-5544 (Thread Compound,
11-14. INSPECTION.
For specific items to be in- Antiseize, Graphite Petrolatum), USP Petro-
spected refer to engine manufacturer's manual.
latum or engine oil as a thread lubricant or
a. Visually inspect the engine for loose nuts, bolts,
to seal a leaking connection.
Apply sparingly
cracks and fin damage.
to male threads only, omitting the first two
b. Inspect baffles, baffle seals and brackets for
threads, exercising extreme caution to avoid
cracks, deterioration and breakage.
"stringing" sealer across the end of the fitting.
c. Inspect all hoses for internal swelling, chafing
Always ensure that a compound, the residue
through protective plys, cuts, breaks, stiffness,
from a previously used compound, or any
damaged threads and loose connections.
Excessive other foreign material cannot enter the system.
heat on hoses will cause them to become brittle and
easily broken. Hoses and lines are most likely to
f. Connect lines and hose as follows:
crack or break near the end fittings and support
1. Fuel hose at fuel strainer on firewall.
points.
2. Primer line to engine at firewall
d. Inspect for color bleaching of the end fittings or
3. Oil temperature bulb at engine.
severe discoloration of the hoses.
4. Oil pressure hose at firewall
5.
Install all clamps attaching lines and hose
NOTE to engine, engine mount, or attached brackets.
g. Connect wires and cables as follows:
Avoid excessive flexing and sharp bends
1. Electrical wires and wire shielding ground
when examining hoses for stiffness.
at alternator.
e. Refer to Section 2 for replacement intervals for
CAUTION
flexible fluid carrying hoses in the engine compart-
ment.
When connecting starter cable, do not per-
f. For major engine repairs, refer to the manu- mit starter terminal bolt to rotate.
Rotation
facturer's overhaul and repair manual. of the bolt could break the conductor between
terminal and field coils causing the starter
to be inoperative.
11-9