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TM 5-6675-250-34
( 6 ) Connect a TS-352/U multimeter or equiv-
(3) Rotate the GAGE/UNCAGE knob clock-
a l e n t in the 2-5 amp range, across jacks N of the
wise  until  the  gap  between  the  shoulder-
ed  screw  and  the  clevis  is  zero.
breakout box and open switch N.
(7) Energize the system in the BIAS mode and
( 4 ) Remove retaining rings from the pins at-
observe the current meter. If the solenoid switch is
t a c h i n g each end of the caging link.
a d j u s t e d properly, the current should be 0.05 amp.
( 5 ) Remove the pins and separate the caging
If the solenoid draws 1.5 amps, the switch must be
l i n k from the caging cam and caging arm.
m o v e d closer to the solenoid. Should the solenoid
b. Inspection. Visually  inspect  for  deformed,
chatter and draw high current, then the switch
w o r n or otherwise defective parts.
must be moved away from the solenoid.
c. Installation.
( 8 ) Switch from BIAS to SELF-TEST several
(1) Attach the upper clevis of the caging link to
times to ensure proper operation.
the caging cam with one pin and two retaining rings.
c. Test.
( 2 ) Attach the lower clevis to the caging arm
( 1 ) Check to see that the solenoid plunger is
with one pin and two retaining rings.
running free. It is sometimes necessary to loosen the
( 3 ) Remove the clutch engaging tool, installed
solenoid  mounting  screws  and  re-position  the
s o l e n o i d to attain a free running condition.
( 4 ) DO n o t  i n s t a l l  c a g i n g  m e c h a n i s m  c o v e r
( 2 ) Install the caging link (para 4-10c).
lower shield at this time.
( 3 ) Install the outer shield (para 4-4d).
d .  A d j u s t m e n t . Adjust the caging link per (para
( 4 ) Install the gear box assembly and housing
c o v e r s (para 4-16).
e. I n s t a l l  c a g i n g  m e c h a n i s m
shield, per paragraph 4-6c.
( 5 ) Install cage-uncage knob (para 4-6c).
(6) Operate the unit to test for correct ad-
4-11. Caging Solenoid
a. Inspection.
4-12. Solenoid Control Switch
( 1 ) Remove the theodolite per (para 4-2a).
a. Inspect.
( 2 ) Remove the cage-uncage knob (para 4-6a).
(1) Remove the cage-uncage knob and the
( 3 ) Remove all of the GRU housing covers by
caging mechanism housing cover (pars 4-6a).
r e m o v i n g attachment screws.
( 2 ) Remove the outer shield (para 4-4a).
( 4 ) Remove the gearbox assembly (para 4-5a).
(3) Inspect for visual evidence of damage or
( 5 ) Remove the outer shield (pars 4-4).
( 6 ) Install to cage-uncage knob.
b. Adjust.
( 7 ) Remove the caging link (pars 4-10).
(1) Refer to (para 4-11b) and adjust the solenoid
(8) Visually inspect for corrosion and other
c o n t r o l  switch.
evidence of defects.
( 2 ) Install the outer shield (para 4-4a).
b. Adjust (fig. 4-4).
(3) Install the caging mechanism cover and
cage-uncage knob (para 4-6c).
4-13. Caging Cam Switch
a. Inspection.
(1) Remove cage-uncage knob and the caging
mechanism covers.
(2) Visually inspect parts for darnage or
b. Adjust (fig. 4-8).
( 1 ) With the caging link adjusted (Pam 4-6b)
set up the system for operation and energize the
caging mechanism by placing the MODE SELECT
SWITCH in the BIAS mode. Manually hold the
clutch in the engaged position so that it is not
r e l e a s e d while adjusting the caging arm switch.
4-12, Change 1

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