Federal Signal Corporation 2001SRNB, Installation And Operating Instructions Manual

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11
STAND-OFF PLUG OPENING
REMOVE BOLT(4) 291305B
Figure 4-7. Collector Housing Opening
7. Remove the collector rings with
stand-offs and cables still attached (see
figure 4-8).
8. Reassemble the collector rings,
stand-offs, and cables before reinstallation.
COLLECTOR RINGS
BOLTS/STAND-OFFS(4)
PLUG
OPENING
291306B
Figure 4-8. Collector Rings
9. To replace collector ring assembly,
align the stand-offs before replacing the four
bolts removed in step seven above.
10. Ensure that collector rings are
concentrically aligned before replacing the
brush assembly.
11. Replace the brush assembly.
12. Look through the plug opening and
ensure that brushes are contacting the
proper collector rings.
13. Replace the plug on the collector
housing assembly.
14. Replace the back panel.
D. Rotator Motor Replacement.
1. Remove the two rotator housing
panels (see figure 4-2).
2. Replace the rotator motor.
Approximately a 1/64” gap between the teeth
of the two gears is required to avoid binding.
Re-tighten rotator motor bolts to a torque of
45 in. lbs.
Figure 4-9. Wiring for Rotator Motor
3. Wire rotator motor and terminal
block as shown in figure 4-9.
4. Grease all gear surfaces with Mobil
Mobilith SHC lithium based grease.3
5. Replace housing panels.
E. Siren Motor Brush Replacement.
1. Remove the outer cone. Remove
the inner cone by removing the four 1/4-20
bolts which secure the cone to the four
internal mounting brackets (8402087E-01).
2. Note siren motor wiring and remove
both terminal connectors.
3. Remove steel mesh brush covers
from motor.
4.
Replace worn brushes.
5. Replace steel mesh brush covers.
6.
Replace terminal connectors,
lockwashers, and nuts. Tighten nuts.
7. Replace inner and outer cones.