2.
Release the fasteners, remove filter cover as applicable.
3.
Remove the filter.
SERVICE INSTRUCTIONS (INSPECTION AND REPLACEMENT).
1.
The air filter must be inspected at least once every 50 hours. Under extremely adverse operating conditions, it must be inspected more frequently. Replace as required.
2.
When returning existing filter to service, rap gently on a hard flat surface to remove embedded debris. Be careful not to damage sealing ends.
3.
Inspect filter housing for damage.
4.
The filter housing may be cleaned by wiping with a clean cloth soaked in a suitable quick drying type solvent.
INSTALLATION OF AIR FILTER.
1. Properly position the filter in the box assembly and secure the cover assembly with the fasteners.
ALTERNATE AIR HEAT DOOR.
The alternate air door is located in the bottom assembly of the carburetor air box to provide a source of heated air to the carburetor should there be an icing condition. The following should be checked during inspection:
1.
Check that the air door seals are tight.
2.
Check that when the cockpit control is in the closed position that the door is properly seated in the closed position.
3.
Actuate the door by operating the control lever in the cockpit to determine that it is not sticking or binding.
4.
Check the cockpit control cable for free travel.
12-20-00 Page 12-18 Revised: February 28, 2002
1F18
LUBRICATION INSTRUCTIONS.
Proper lubrication procedures are of immeasurable value both as a means of prolonging the service life of the airplane and as a means of reducing the frequency of extensive and expensive repairs. The periodic application of recommended lubricants to their relevant bearing surfaces, as detailed in the following paragraphs, together with the observance of cleanliness will insure the maximum efficiency and utmost service of all moving parts. Lubrication instruction regarding the locations, time intervals, and type of lubricants used may be found in the Lubrication Chart. To insure the best possible results from the application of lubricants, the following precautions should be observed:
1.
Use recommended lubricants. Where general purpose lubricating oil is specified, but unavailable, clean engine oil may be used as a satisfactory substitute.
2.
Check the components to be lubricated for evidence of excessive wear and replace them as necessary.
3.
Remove all excess lubricants from components in order to prevent the collection of dirt and sand in abrasive quantities capable of causing excessive wear or damage to bearing surfaces.
— Note —
If the airplane is inactive for long periods of time, it should be lubricated in accordance with Lubrication Chart every 90 days.
APPLICATION OF OIL.
Whenever specific instructions for lubrication of mechanisms requiring lubrication are not available, observe the following precautions:
1.
Apply oil sparingly, never more than enough to coat the bearing surfaces.
2.
Do not oil control cables.
— CAUTION —
BE CAREFUL NOT TO ADD TOO MUCH OIL, BECAUSE THE EXCESS WILL BE THROWN OFF DURING OPERATION AND WILL CAUSE PITTING AND BURNING OF THE MAGNETO POINTS.
3. Squeeze the magneto cam follower felts at regular inspection periods. If oil appears on fingers, do not add oil. If the felt is dry, moisten with light oil.
12-20-00 Page 12-19 Revised: February 28, 2002
APPLICATION OF GREASE.
Care must be taken when lubricating bearings and bearing surfaces with a grease gun, to insure that gun is filled with new clean grease of the grade specified for the particular application before applying lubrication to the grease fittings.
1.
Where a reservoir is not provided around a bearing. apply the lubricant sparingly and wipe off any excess.
2.
Remove wheel bearings from the wheel hub and clean thoroughly with a suitable solvent. When repacking with grease, be sure the lubricant enters the space between the rollers in the retainer ring. Do not pack the grease into the wheel hub.
3.
Use extra care when greasing the constant speed propeller hub to avoid blowing the clamp gaskets. Remove one grease fitting and apply grease to the other fitting until fresh grease appears at the hole of the removed fitting.
12-20-00 Page 12-20 Revised: February 28, 2002
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