Priming System - Cessna 150 STANDARD Service Manual

NOTE
The fuel vent line protruding beneath the wing
near the wing strut must be correctly aligned
to avoid possible icing of the vent tube.
A
150 AND F150
2
B
A150 AND FA150
1.
Wing Strut
2. Wing Skin
3. Bracket
4. Clamp
5. Grommet
3.40
6. Vent Tube
1.
19-'
-I. 86
-~1.73
*
PRlOR TO SERlAL NO. 15067851
PRlOR TO SERlAL NO. F150-0360
5
5
2
6
1.40--1
*
SERlAL NO. 15067851 AND ALL SERVICE PARTS
SERlAL NO. F150-0360 AND ALL SERVICE PARTS
VENT LINE MUST BE PARALLEL
TO WING CHORD LINE. TOLER-
ANCE UP 5°, DOWN 0°.
Figure 12-4. Fuel Vent Location
P-S-661, or equivalent) and dry with compressed
air.
d. Using a new gasket between filter screen and top
assembly, install screen and standpipe. Tighten
,standpipe only finger tight.
e. Using all new O-rings, install bowl. Note that
step-washer at bottom of bowl is installed so that
step seats against O-ring.
f.
Turn shut-off valve to "ON" position, check for
leaks and proper operation.
g. Torque bottom nut (15) to 25-30 lb-in., and
safety wire to top assembly of strainer. Wire must
have right-hand wrap, at least 45 degrees.
h. Connect drain tube.
1
12-18. PRIMING SYSTEM. (See figure 12-2.)
12-19. DESCRIPTION. The priming system is com-
prised of a manually-operated primer located on the
instrument panel, and a line from the primer to the
SHOP NOTES:
12 -8 Change 1
intake manifold. Operation of the plunger forces fuel
directly into the engine intake manifold.
12-20. REMOVAL AND INSTALLATION.
I
a. DisConnect and cap all lines at primer.
b. Unscrew knurled nut and remove plunger from
pump body.
c. Remove pump body from instrument panel.
NOTE
Visually inspect primer lines for crushed,
kinked, or broken condition. Ensure proper
clamping to prevent fatigue due to vibration
and chafing.
d. Prior to installing a primer, check for proper
pumping action and positive fuel shut-off in the lock-
ed position.
e. Reverse preceding steps for installation.