Mooney M20TN, Service And Maintenance Manual

Page: 307 / 1169

MOONEY AVIATION COMPANY, INC.
M20TN SERVICE & MAINTENANCE MANUAL
Date
2006
Rev Date
Page 17
8. See 32--30--06 procedure prior to reassembly for
additional maintenance, if necessary.
RE--ASSEMBLY
1. Lubricate gear and new clutch spring thoroughly
with lube (MIL--G--81322) poly--lube.
2. Using gear assembly (6) as insertion tool, place
new clutch spring on cam end of assembly and turning
CCW, install spring into clutch housing to about mid--
point. DO NOT FORCE SPRING. While rotating CCW,
insert clutch spring into bore until fully seated.
3. Withdraw gear assembly (6).
NOTE:
Be sure spring is all the way in and seated
around cam.
4. Insert clutch gear assembly (10) into clutch spring
and housing from cylindrical end of housing, insuring
that spring tangs fit into recesses in cam.
NOTE:
When clutch spring is properly seated, large in-
put gear (6) can be rotated in either direction and
small output gear (10) will follow rotation direc-
tion.
5. Lubricate output gear teeth (10) with
MIL--G--81322, and install clutch housing, gear and
spring assembly in actuator body by mating gear (10) to
output gear train assembly. To engage gear teeth and
fully seat hub into bearing, rotation of gear assembly
may be required.
6. Re--install screws (7) to secure clutch housing into
actuator body. Use Loctite, Grade A, on threads.
7. Re--insert input gear assembly (6) into clutch
housing and clutch spring assembly until fully seated.
Lubricate gear teeth (6) with MIL--G--81322 poly--lube.
8. Disassemble Clutch Housing Mount Assembly
(5A) from recoiler assembly (5). DO NOT ALLOW
BEARING OR SHIMS TO DROP OUT OF CLUTCH
HOUSING MOUNT ASSEMBLY.
9. Normally the existing shims (16) already installed
behind bearing (15) will be correct for the new clutch
spring. However, due to manufacturing tolerances, it
may be necessary to change shim thickness for proper
spring adjustment.
10. Three different shim thicknesses are available
from EATON:
P/N. 110117--1 (.003 in. thk.)
P/N. 110117--2 (.005 in. thk.)
P/N. 110117--3 (.010 in. thk.)
Any combination of these shim thicknesses are al-
lowed to obtain the correct rotational torque (inch
pounds of torque) of input gear shaft after clutch hous-
ing mount assembly is installed (minus recoiler assy
portion) and torqued into place.
NOTE:
Clutch assembly can now be verified for proper
installation by rotating input gear (6) both CW &
CCW. Gears should turn with moderate friction to
hand torque. Observe that actuator output screw
jack rotates in BOTH directions.
In some instances, the new clutch (no--back)
spring “CHATTERS” during electrical extension
or retraction cycle. Proper shimming of the “no--
back” clutch housing assembly, items 6, 7, 8, 9, &
10 and bearing 15 (Fig. 32--17) with shims 16 is
necessary to eliminate the chatter.
11. The rotational torque used by EATON for new ac-
tuators is no more than 4.0 inch pounds of consistent,
running, rotational torque in both the CCW and CW di-
rections. If this recommended rotational torque is not
obtained on the first assembly attempt, the clutch hous-
ing mount assembly will require removal and shims
must be added or removed until the proper rotational
torque is obtained. A special “socket” can be made to
properly fit the flats on the input gear shaft to use the 1/4
inch drive, 0 to 15 inch lbs., Torque Driver.
12. When correct rotational torque has been ob-
tained, re--install clutch housing mount assembly (5A),
if removed, to recoiler assembly (5). Re--install this as-
sembly to transmission portion of the actuator.
NOTE:
Flats on gear (6) shaft must line up with the brass
manual drive clutch (13) for proper assembly.
Pull manual drive cable slightly to position brass
clutch to align with flats on gear shaft (6).
13. Install new bolts (3) ADS 145--10--43 (2 each) and
(4) ADS 145--10--38 (2 each) and torque to 20--25 inch
pounds. Bolts are EATON P/N’s. Use Loctite grade A
(catalog number 88--31) on bolt threads.
14. Reinstall cable support bracket and lock nuts (1)
on bolts (3 & 4). Torque lock nuts to 20--25 inch pounds.
15. Install modification plate adjacent to I.D. plate (@
first 1000 hour replacement only). Mark first block on
modification plate with the figure “1” using metal stamp
or etching tool. Mark plate at each succeeding clutch
spring replacement with the next consecutive number.
16. Reinstall actuator into aircraft into aircraft per pro-
cedures below:
A. Install actuator into hat section lug.
B. Install Heim to retract bellcrank.
C. Route emergency cable through support brack-
et, pulleys to “T” handle position on floorboard. Insert
cable into “T” handle and tighten set screw.
D. Reconnect electrical connection. Check for
proper electrical and mechanical operation.
17. Verify rigging per Section 32--30--00.
32--30--05