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1G8
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COMPONENT LUBRICANT FREQUENCY
1. DOOR & COWL SEALS - SEE SPECIAL INSTRUCTION 6 CARBON DIOXIDE RELEASE AGENT DRY LUBRICANT MS-122N/CO2 AS REQUIRED
2. NOSE CONE & NOSE DOOR HINGES, BAGGAGE & MAIN DOOR HINGES SEE SPECIAL INSTRUCTION 6 MIL-L-7870 100 HRS
3. PILOT & COPILOT SEAT ADJUSTMENT SEE SPECIAL INSTRUCTION 6 AND NOTE 1 MIL-G-7711 500 HRS
4. DOOR LATCH MECHANISM SEE SPECIAL LUBRIPLATE #907, INSTRUCTION 6 FISKE BROS. REFINING CO. 500 HRS
SPECIAL INSTRUCTIONS 6. Lubrication Points - Wipe all lubrication points clean of old grease, oil. dirt, etc., before lubricating NOTES 1. Pilot and Passenger Seats - Lubricate track rollers and stop pins as required (Type of lubricant: MIL-L-7870).
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1G10
CHART 1201. THREAD LUBRICANTS
TYPE OF LINE TYPE OF LUBRICANT
Brakes Freon Fuel Landing Gear (Air Valve) Oil Pitot and Static MIL-H-5606 TT-A-580 or MIL-T-5544, Anti-Seize Compound MIL-T-5544, Anti-Seize, Graphite Petrolatum 6PB Parker MIL-G-6032, Lubricating Grease (Gasoline and Oil Resistant) TT-A-580 (JAN-A-669), Anti-Seize Compund (White Lead Base)
— Note —
Lubricate engine fittings only with the fluid contained in the particular lines.
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1G12
CHAPTER
20
STANDARD PRACTICES -
AIRFRAME
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CHAPTER 20 - STANDARD PRACTICES - AIRFRAME
TABLE OF CONTENTS / EFFECTIVITY
CHAPTER/ SECTION SUBJECT GRID NO. EFFECTIVITY
20-00-00 STANDARD PRACTICES - AIRFRAME 1G17
Torque Wrenches Method of Installing Rod End Bearings Cherrylock Rivets, Removal Identification of Fluid Lines 1G17 1G18 1G19 1G20 1R0202
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1G16
STANDARD PRACTICES - AIRFRAME.
TORQUE WRENCHES.
Torque wrenches should be checked daily and calibrated by means of weights and a measured lever arm to make sure that inaccuracies are not present. Checking one torque wrench against another is not sufficient and is not recommended. Some wrenches are quite sensitive as to the way they are supported during a tightening operation. Any instructions furnished by the manufacturer must be followed explicitly.
When it is necessary to use a special extension or adapter wrench together with a torque wrench, a simple mathematical equation must be worked out to arrive at the correct torque reading. Following is the formula to be used: (Refer to Figure 20-1)
T = Torque desired at the part.
A = Basic lever length from center of wrench shank to center of handle or stamped on wrench or listed
for that model wrench. B = Length of adapter extension, center of bolt to center of shank. C = Scale reading needed to obtain desired torque (T).
A x T The formula: C =
A + B EXAMPLE A bolt requires 30 foot pounds and a 3 inch adapter (one-quarter of a foot or .25‘) is needed to get at it. You want to know what scale reading it will take on a one-foot lever arm wrench to obtain the 30 foot pounds at the bolt.
C = 1 x 30 30or C = = 24 ft.-lbs.
1 + .25 1.25 Remember the 3 inch adapter must be projecting 3 inches straight along the wrench axis. In general avoid all complex assemblages or adapters and extensions of flex joints.
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METHOD OF INSTALLING ROD END BEARINGS.
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1G18
CHERRYLOCK RIVETS, REMOVAL. (Refer to Figure 20-3.)
Should it be necessary to remove an installed cherrylock
rivet, the following procedures are recommended. In thick material remove the lock by driving out the rivet stem, using a tapered steel drift pin. (See View 1)
— Note —
Do not drill completely through the rivet sleeve to remove a rivet as this will tend to enlarge the hole.
2.
If the rivets have been installed in thin sheets, driving out the locked stem may damage the sheets. It is recommended that a small center drill be used to provide a guide for a larger drill on top of the rivet stem, and the tapered portion of the stem be drilled away to destroy the lock. (See Views 2 and 3)
3.
Pry the remainder of the locking collar out of the rivet head with the drift pin. (See View 3)
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