Tuesday, November 13, 2012

Cessna 172R Nose Landing gear

           The nose gear shock strut requires a periodic check to make sure the strut is filled with hydraulic fluid and is inflated to the correct air pressure. The procedures give only replenishing and servicing instructions.

      Shock Strut Servicing Procedures
                   The nose landing gear shock strut must be serviced every 100 hours.

 To service the nose gear shock strut, proceed as follows:
(1) Raise airplane nose to remove pressure from shock strut.
(2) Remove valve cap and release all air.
(3) Remove valve housing assembly.
(4) Compress strut completely (stops in contact with outer barrel hub).
(5) Check and replenish oil level.
        NOTE: Fluid used must comply with specification MIL-PRF-5606.
(a) Fill strut to bottom of valve installation hole.
(b) Maintain oil level at bottom of valve installation hole.
(6) Fully extend strut.
(7) Reinstall valve housing assembly.
(8) With strut fully extended and nose wheel clear of ground, inflate strut to 45 PSI.

        NOTE: The nose landing gear shock strut will normally require only a minimum amount of service.
       Strut extension pressure must be maintained at 45 PSI. Machined surfaces must be wiped
free of dirt and dust using a clean, lint-free cloth saturated with MIL-PRF-5606 or kerosene.
All surfaces must be wiped free of excessive hydraulic fluid

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