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Home > Radar Maintenance and Parts Manuals > > Rotary Joint Assembly
Removal/Replacement Procedures - TM-11-5840-360-14-1-10195
Figure 5-6 Reed Switch and Magnet Assemblies Location

TM-11-5840-360-14-1-1 Radar Set AN/SPS-64(V)5 (NSN 5840-01-034-3946) Manual
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TM 11-5840-360-14-1-1
7. Replace resolver B2 by reversing the preceding
5. Remove two lock nuts which attach rotary joint
steps.
assembly to rotary joint mounting plate and carefully
withdraw rotary joint.
8. Align per paragraph 5.11.3.1.
6. Replace rotary joint assembly by reversing the
5.11.2.4 Data Unit Assembly. - See Figures 5-4 and 5-6;
preceding steps.
refer to assembly drawings in Chapter 6, Section 6.3 as
necessary .
CAUTION
THE TOP OF THE ROTARY JOINT
1. Insure power is removed from pedestal per
paragraph 5.11.2.
ASSEMBLY CONTAINS TWO GUIDE
PINS HOLE5. HEN REPLACING THE
2. Gain access per steps 2, 3 and 4 of paragraph
ASSEMBLY, INSURE THAT THESE
5.11.2.1.
HOLES ARE MATED WITH THE PINS
3. Remove Rotary Joint assembly per paragraph
ON THE BOTTOM OF THE ARRAY
5.11.2.5.
BE FORE TIGHTENING THE LOCK
4. Using a common pencil, scribe the point of
NUT5.
mesh between the data gear on the Data Unit assembly
5.11.2.6 Reed Switch Assembly. - See Figures 5-4 and
and the drive gear.
5-6; refer to assembly drawings in Chapter 6, Section
5. Remove the two hex bolts which hold the Data
6.3 a s necessary .
Unit assembly; withdraw the assembly as far as possible
1. Insure power is removed from pedestal per
without stressing the harness wires.
paragraph 5.11.2 .
NOTE:
2. Gain access per steps 2, 3 and 4 of paragraph
Disconnect the wires listed in steps 6
5.11.2.1.
and 7 only if it is necessary to re
3. Remove rotary joint assembly per paragraph
move  the  Data  Unit  assembly
5.11.2.5.
completely;  if  the  task  being
4. Remove data unit assembly per paragraph
performed can be accomplished by
5.11.2.4.
moving the assembly within the
5. Using a grease pencil, scribe radial alignment
range  of  the  harness  do  not
marks on the data gear and the shaft end which extends
disconnect the wires.
through the data gear.
6. Disconnect  the  eight  harness  wires  from
6. Loosen the screw in the hub clamp and slide the
resolver B2, tagging each for connection terminal.
clamp and data gear from the shaft.
7. Disconnect two harness wires from bottom of
7. Carefully note the position of the reed switch
reed switch standoff terminals, noting connection points.
glass envelope with respect to the mounting posts; note
8. Replace Data Unit assembly by reversing the
particularly the method by which the switch leads are
preceding steps, insuring that scribe marks on data and
attached to the posts and dressed. When installing the
drive gears are aligned when the assembly mounting
new reed switch, locate it in as nearly the same position
bolts are installed.
as possible.
9. Align per paragraph 5.11.3.1.
8. Disconnect switch leads from mounting posts
5.11.2.5 Rotary Joint Assembly. - See Figure 5-4; refer
and remove switch.
to assembly drawings in Chapter 6, Section 6.3 as
9. Rotate the glass envelope of the new reed
necessary .
switch to orient the reeds as shown in the detail of
1. Insure power is removed from the pedestal per
Figure 5-6. Maintaining proper reed orientation, position
paragraph 5.11.2.
the switch as noted in step 7.
2. Gain access per steps 2, 3 and 4 of paragraph
10. Leaving sufficient lead length free to permit
5.11.2.1.
slight positional adjustment of the switch, attach and
3. Remove the screw, washer and lock washer
solder switch leads to mounting posts.
which secure the anti-rotation plate to its mounting post.
11. Slide the data gear and hub clamp onto the
4. Disconnect wire from brush assembly (mounted
shaft until the gear contacts the retaining ring. Hold the
on anti-rotation plate).
shaft coupling and turn the gear to align the scribe
CAUTION
marks on the gear and shaft end, then tighten the hub
DO  NOT  ALTER  SETTINGS  OF
clamp screw.
SPRING  TENSION  ADJUSTMENT
12. Connect a multimeter, set for R x 1 resistance
SCREWS
ON
ROTARY
JOINT
measurement, between terminals 10 and 13 of T B 1.
MOUNTING
PLATE.
THESE
13. Rotate data gear to pass magnet slowly back
SCREWS ARE FACTORY SET AND
and forth across reed switch.  If switch closure is
SHOULD NOT BE ADJUSTED IN THE
indicated on multimeter, proceed to step 15; if not
FIELD.
perform step 14.
5-30






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