Trim Tab Actuator Cleaning, Inspection And Repair - Cessna 177 SERIES Service Manual

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~NOTE
13
Shaded pulleys are used c 14
12 W ^"v ^
in this system only.
3
9 13 113
Detail C
8
017
g1819 -17 \i Detail D
X_
25
6 26-~5k / ,
/ ? ** Castellated nut and pin beginning
Safety wire these items.
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D
'with aircraft serial 17701483.
/
24
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REFER
TO FIGURE
-9
REFER TO FIGURE 9-3 , - \ Detail
E
FOR ACTUATOR (21)
DETAIL 2
*r Guard (18) is installed on aircraft serial 17701164
Pins are installed beginning with aircraft serial 17701165
OBeginning with aircraft serial 17701165
Figure 9-1. Stabilator Trim System (Sheet 2 of 2)
b. Disassemble actuator assembly as illustrated
c. Inspect all component parts for obvious indica-
in figure 9-3 as follows: tions of damage such as stripped threads, cracks,
1. Remove retaining rings (12) from actuator
deep nicks and dents.
assembly and slide actuator bracket (index 20, d. Check bearings (2 and 9), screw (5) and threaded
figure 9-1) from housing (7).
rod end (10) for excessive wear and scoring.
2. Using suitable punch and hammer, remove Dimensions of the parts are as follows:
groov pins (4) securing sprocket (1) to screw (5) and BEARING (2)
remove sprocket from screw. INSIDE DIAMETER
0.373" MIN.
3. Unscrew threaded rod end (10) and remove INSIDE DIAMETER
0. 380" MAX.
rod end from actuator.
4. Remove groov pins (6) securing bearings BEARING (9)
(2 and 9) at the housing ends. INSIDE DIAMETER
5. Lightly tap screw (5) in the opposite direc- SMALL HOLE 0. 248" MIN.
tion from sprocket end, remove bearing (9), O-ring SMALL HOLE 0.253" MAX.
(8) and collar (3).
LARGE HOLE 0. 373" MIN.
6. Lightly tap screw (5) toward the sprocket LARGE HOLE 0. 380" MAX.
end of housing, remove bearing (2) and collar (3).
THREADED ROD END (10)
9-7B. CLEANING, INSPECTION AND REPAIR. OUTSIDE DIAMETER
(Refer to figure 9-3.) (SHANK) 0.242" MIN.
a. DO NOT remove bearing (11) from threaded rod 0. 246" MAX.
end (10) unless replacement of bearing is necessary.
b. Clean all component parts, except bearing (11), SCREW (5)
by washing in Stoddard solvent or equivalent. Do not OUTSIDE DIAMETER 0. 367" MIN.
clean sealed bearing (11). 0. 370" MAX.
9-4 Change 6