Cessna 150 Series Service Manual page 75

5-24. TROUBLE SHOOTING.
TROUBLE
PROBABLE CAUSE REMEDY
NOSE WHEEL SHIMMY. Nose strut attaching bolts loose. Tighten nose strut attaching bolts.
Loose or worn nose wheel steering Tighten. Replace defective parts
linkage. with new parts.
Nose wheel out of balance. Refer to paragraph 5-34.
Wheel bearings too loose. Adjust properly.
Defective shimmy dampener. Repair, or install new dampener.
Shimmy dampener fluid low. Service in accordance with Section
2.
Loose torque links. Add shims, or install new parts as
required.
Worn steering arm assembly shims.
Replace or add shims as required.
NOSE STRUT DOES NOT Defective or loose air filler valve. Check gasket and tighten loose
HOLD AIR PRESSURE. valve. Install new valve if defective.
Defective strut seals. Install new seals.
HYDRAULIC FLUID Defective strut seals. Install new seals.
LEAKAGE FROM NOSE
STRUT.
5-25. NOSE GEAR REMOVAL. (Refer to figure 5-6.) 5-27.
NOSE WHEEL SPEED FAIRING REMOVAL.
a. Remove engine cowling for access.
a. Weight or tie down tail of aircraft to raise nose
b. Weight or tie down tail of aircraft to raise nose
wheel off floor.
wheel off the floor.
b. Remove nose wheel axle stud.
c. Disconnect nose wheel steering tubes from nose c. Remove bolt securing cover plate and fairing to
gear steering collar,
strut; remove cover plate.
d. Remove screws attaching hose clamps to strut.
WARNING
e. Remove air filler valve core and deflate strut
completely, and telescope strut to its shortest length.
Do not remove bolt attaching tow bar spacers,
WARNING unless strut has been completely deflated.
Be sure strut is deflated completely before
d. Slide speed fairing up and remove nose wheel.
removing bolt or roll pin at top of strut.
Loosen scraper if necessary.
e. Rotate speed fairing 90 degrees and work fairing
f.
Remove roll pin at top of strut, and remove bolt
down over the fork to remove.
which clamps strut to lower part of engine mount.
g.
Pull the strut assembly down out of engine mount 5-28. NOSE WHEEL SPEED FAIRING INSTALLA-
fitting.
TIQN.
a. Rotate speed fairing 90
°
and work fairing up over
5-26. NOSE GEAR INSTALLATION.
(Refer to fig-
the fork; rotate fairing to correct position.
ure 5-6.)
b.
Slide fairing up and install nose wheel; install
a. Reverse the steps outlined in paragraph 5-25 to axle stud.
install the nose gear.
c. Tighten axle stud until a slight bearing drag is
obvious when the wheel is rotated. Back off nut to
NOTE
the nearest castellation, and install cotter pins.
d. If shock strut was deflated, service after in-
Always install roll pin before clamping strut
stallation has been completed. Refer to servicing
into lower portion of engine mount to prevent instructions in Section 2.
misalignment. Torque clamp bolt in lower e. Adjust wheel scraper clearance in accordance
portion of engine mount fitting to 120*20 lb-in
with the following caution.
5-12 Change 1