Cessna 172R Shimmy Damper

NOSE LANDING GEAR SHIMMY DAMPER – SERVICING PROCEDURE
A. Service the shimmy damper every 100 hours.
B. Service the shimmy damper as follows:
(1) Remove the shimmy damper from the airplane.
(2) While you hold the damper in a vertical position with the fitting end pointed down, pull the fitting end of the damper shaft to its limit of travel.
(3) While you hold the damper in this position, fill the damper through the open end of the cylinder with hydraulic fluid.
(4) Push the shaft up slowly to seal off the filler hole.
(5) Clean the damper with solvent. Make sure that the shaft comes out through the filler hole until the damper is installed on the aircraft.
(6) Install the damper on the airplane.
C. Keep the shimmy damper clean.
(1) Clean the shimmy damper with a clean, lint-free cloth to prevent the collection of dust and grit.
(2) Make sure that the part of the damper piston shaft that you can see is always clean.
(3) Clean the machined surfaces of the shimmy damper.
(a) Use a clean, lint-free cloth soaked with hydraulic fluid to clean the machined surfaces.
(b) After the surfaces are clean, remove the remaining hydraulic fluid from them with a clean, lint-free cloth.
Shimmy Damper Servicing (On Airplanes with the Lord Shimmy Damper)
A. Lord Shimmy Dampers do not need special servicing. However, you must lubricate the nose wheel
shimmy damper pivots with general purpose oil MIL-L-7870.
B. Keep the shimmy damper clean.
(1) Clean the shimmy damper with a clean, lint-free cloth to prevent the collection of dust and grit.
(2) Make sure that the part of the damper piston shaft that you can see is always clean.
(3) Clean the machined surfaces of the shimmy damper with a clean, lint-free cloth to prevent the collection of dust and dust.
C. If necessary, exercise a shimmy damper before installation.
(1) If a shimmy damper has been in storage for a long period, make sure that it moves freely before you install
CAUTION: Make sure that you do not push or pull on the shaft of the shimmy damper after it has reached its limit in either the up or the down position. If you continue to push a fully
compressed, bottomed-out shaft, you can cause damage to the shimmy damper. If you
continue to pull on a fully extended shaft, you can cause damage to the shimmy damper.
(2) If the shimmy damper does not move freely, push and pull the shaft through complete cycles until it
does move freely. When the shimmy damper shaft has come to its limit of travel up and down as you push and pull, make sure that you do not continue to push or pull it beyond that limit of travel

Comments

Post a Comment

Popular posts from this blog

Cessna 152 Magneto Check

MAGNETO CHECK. NEVER ADVANCE TIMING BEYOND SPECIFICATIONS IN ORDER TO REDUCE RPM DROP. Too much importance is being attached to RPM drop in single ignition. RPM drop on single ignition is a natural characteristic of dual ignition design. The purpose of the following magneto check is to determine that all cylinders are firing. If all cylinders are not firing, the engine will run extremely rough and cause for investigation will be quite apparent. The amount of RPM drop is not necessarily significant and will be influenced by ambient air temperature, humidity, airport altitude, etc. In fact, absence of RPM drop should be cause for suspicion that the magneto timing has been bumped up and is set in advance of the setting specified. Magneto checks should be performed on a comparative basis between individual right and left magneto performance. a. Start and run engine until the oil and cylinder head temperatures are in normal operating ranges. b. Advance engine speed to 1700 RPM. c. Tu
Read more

Brake System Cessna 172

                             BRAKE SYSTEM -MAINTENANCE PRACTICES              1. Description and Operation A. The hydraulic brake system is comprised of two master cylinders, located immediately forward of the  pilot’s rudder pedals, brake lines and hoses, and single-disc, floating cylinder brake assemblies located at  each main landing gear wheel. B. The parking brake system is comprised of a pull-type handle and mechanical connections which are  linked to the rudder pedal assembly. Pulling aft on the brake handle applies mechanical pressure to the  rudder pedals, activating the brakes and locks the handle in place. Turning the handle 90 degrees will  release the parking brake and allow for normal operation through the rudder pedals. C. Brake operation is accomplished by pushing on the upper part of each rudder pedal. This motion is  mechanically transmitted to the respective brake master cylinder, and through fluid-carrying lines out to  the brake assembly where fluid pressure
Read more

McCauley Propeller Installation fixed pitch

Image
Propeller Installation for all fixed pitch propellers (except 1A162 model propellers).                   WARNING: MAKE SURE THE MAGNETO IS GROUNDED BEFORE INSTALLING  THE PROPELLER OR CONNECTING EXTERNAL POWER.                NOTE: McCauley recommends that propeller mounting nuts (if applicable) be replaced at each  propeller installation, whenever possible. However, nuts may be reused providing the threads are in good condition and the locking material prevents turning of the nut on the  stud by hand. Propeller mounting bolts must be magnetic particle inspected in accordance  with ASTM E-1444 or replaced whenever the propeller is removed from the engine.                NOTE: The aircraft maintenance manual or STC installation instructions should always be  consulted for any specialized procedures applicable to a specific aircraft. Various spinner arrangements not manufactured by McCauley may be used which require additional procedures. (1) Make sure the mating surfaces of t
Read more