18.104.22.168 Sheave Alignment Check (V4). - Check sheave
alignment as follows.
System level troubleshooting is based on system
performance checks. A performance check procedure
BE AWARE OF THE ANTENNA
(V)2, (V)3and (V)4 of the AN/SPS64(V) Radar Set.
ARRAY POSITION AT ALL TIMES
These procedures check the major operating
parameters of the radar sets and provide initial fault
isolation sorting at the system level. Associated with
each procedural step is a reference to the appropriate
voltage by opening interlock switch S6.
When faulty indications are observed during the system
2. Set Indicator (master) POWER switch to TX
performance check, record the step numbers at which
ON; set Antenna Safety switch to ON.
the faulty indications are noted, and proceed with the
3. Open access door at front of pedestal.
Upon completion of the
performance check, analyze the faulty indications to
4. Observe sheaves and drive belts as antenna
determine if a logical pattern (indicating a common
rotates; verify sheaves are aligned vertically and line of
fault) exists. If so, refer to the performance check step
travel of belts is straight. If incorrect, note position of
most closely related to the suspected common fault and
drive sheave (too low or too high), and adjust as follows.
proceed to the equipment troubleshooting chart
5. Set Antenna Safety switch to OFF. Remove
referenced in that step. If no pattern is recognized, refer
bottom access cover at rear of pedestal.
to the step at which the first faulty indication was noted
6. Remove three hex screws from bottom of drive
and proceed to the referenced troubleshooting chart.
sheave hub; place these screws in the three threaded
holes in the hub and tighten in a uniform pattern (this
5.8.2 Performance Verification Procedures
loosens the hub and sheave from the motor shaft).
7. Adjust the vertical position of the drive sheave
on the motor shaft as noted in step 4 to correct
performance verification procedures for each version of
the AN/SPS-64(V) Radar Sets. Perform the steps of the
8. Remove the three hex screws from the bottom
paragraph applicable to the radar set installed. The data
of the drive sheave hub and place in the three
enclosed in slashes / / following each step defines the
unthreaded holes in the hub; tighten into the sheave in a
figure number and applicable entry point of the
associated troubleshooting chart, e.g., /5-2(19)/ refers to
9. Set Antenna Safety switch to ON and repeat
step 4. If alignment is incorrect, repeat steps 5 through
9 until alignment is achieved.
22.214.171.124 AN/SPS-6L4(V)1 System Performance
Check. - Perform the following steps in the sequence
126.96.36.199 Access Hatch Gasket Inspection (V4). - Inspect
access cover gaskets as follows:
1. Set Indicator POWER switch to ST BY; verify
1. Open access door at front of pedestal. Remove
top and bottom access covers at rear of pedestal.
a. Lamps on control panel, bearing scales
2. Inspect door and cover gaskets for breaks or
b. Status indicator (LED adjacent to POWER
3. Check door and cover gasket mating surfaces
switch) flashes slowly (approximately
for evidence of seepage.
once per second). /5-2 (1)/
2. Set Indicator POWER switch to TX ON; after
3.5 minute time delay, verify the following:
b. Status indicator glows steadily. /5-2(22)/
Loosen captive screws and remove both air filter
3. Set Indicator RANGE SELECT switch to each of
covers from cabinet front cover. Remove air filters and
its eleven positions in turn; verify the following at each
wash in warm fresh water with detergent.
thoroughly in fresh water and allow to dry before
SECTION III: SYSTEM MAINTENANCE AND
c. Range rings, electronic bearing line (EBL)
5.8 SYSTEM TROUBLESHOOTING