ACA ALLERTOR 125 User manual

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INSTALLATION
OPERATION
MAINTENANCE
And PARTS
MANUAL
4801 W. Woolworth Ave.
Milwaukee, WI. 53218
Phone # (414) 358-8000
Fax # (414) 358-8008
ALLERTOR 125
ROTATING DIRECTIONIAL SIREN

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TABLE OF CONTENTS
Page
TABLE OF CONTENTS 2
GENERAL INFORMATION 3
SPECIFICATIONS 3
INSTALLATION 4
General 4
Site Selection and Types of Mounting 4
Electrical Power Requirements 4
Provision for Servicing 4
Mounting Layouts and Details 5-7
Mechanical Installation 8
Pole Mount 8
Roof Mount 8
Lifting Into Position 8
Electrical Controls 8
Pre-Operation Checks 9
Preliminary Test 9
Final Wiring and Testing 9
Operation 9
MAINTENANCE INSTRUCTIONS 9
Lubrication 9
Adjusting Drive Chain Tension 9
Cleaning Collector Rings 9
TROUBLE-SHOOTING CHECK LIST 10
INSPECTION 11
DISASSEMBLY, REPAIR, REPLACEMENT AND REASSEMBLY 11
PREPARATION FOR RESHIPMENT 11
STORAGE 11
PARTS LIST 12-14
Control Panel for 3 Phase 2 Signal Siren 12
Control Panel for Single Phase 2 Signal Siren 13
Control Panel for 3 Phase 3 Signal Siren 14
Siren Assembly 15-17
ILLUSTRATIONS
Figure Page
1Roof Mount 5
2Parapet Mount 5
3 Chimney Mount 5
4 Tower or Tank Mount 5
5 Siren Support Platform 5
6 Work Platform and Siren Support 6
7 Wood Pole with Service Platform 6
8 Lifting Details 6
9 Mechanical and Electrical Installation Details 6
10 Siren Mounting Details 7
11 Maintenance Details 7
12 Control Panel for 3 Phase 2 Signal Siren 12
13 Control Panel for Single Phase 2 Signal Siren 13
14 Control Panel for 3 Phase 3 Signal Siren 14
15 Siren Assembly Exploded View 15

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GENERAL INFORMATION
The A.C.A. Allertor 125 is a powerful, rotating, directional
siren with a unified design that is both compact and
weatherproof. The output of 126 decibels at 100 feet is
radiated to an effective 70 DB range of 4500 feet, thus giving
a total circular coverage of 2.2 square miles per siren. (Federal
CD Guide, March 1964.)
The single 10 HP motor produces the sound through direct
drive rotor-stator design and also rotates the entire assembly at
3.5 RPM through a direct drive worm and spur gear
combination.
Model CD1-103 Size B is a two-signal siren
Model CD-107 Size 3B3 produces two or three signals
The standardized signals are as follows:
1 - ALERT, a dual tone sustained tone scale signal
2 - ATTACK - TAKE COVER, a dual tone wailing slowly
up and down tone scale signal
3A - FIRE, a dual tone wail of different timing than the
attack signal
3B - FIRE, a dual tone yelp or rapid down tone scale signal
with a pause between each tone blast.
All signals are precisely controlled by a solid state integrated
circuit master control device or a radio decoder-timer.
When specified, the electrical controls associated directly with
the siren are prewired and contained inside a weatherproof
metal enclosure, which may be mounted in any convenient
location. Electrical installation is simple and straightforward.
A variety of signal sources may be employed to initiate
operation of a siren or siren system including -
1 - Direct mechanical switch
2 - Telephone relay system
3 - Radio relay system
4 - Program timer
5 - Any combination of the above
SPECIFICATIONS
Weight:
Allertor 125 (2 signal).………….……………….425 lbs.
Allertor 125 (3 signal)………………..……….…450 lbs.
Dimensions:
Overall assembly……………………7 ft. long, 3 ft. wide,
5 ft. high
ACOUSTICAL DATA
Output level………………………………126 DB at 100 feet
Output frequencies:
Standard dual tone…………………………523/698 hertz
Special single tone………………………………465 hertz
Special single tone………………………………698 hertz
Output cutoff (resonant) frequency…………………..80 hertz
Sound dispersal beam……………………10' above horizontal
15' below horizontal
30' wide horizontally
MOTOR DATA
For compression-
Modulation……………………10 hp, 3 phase, ball bearing,
Semi-enclosed, induction
motor. High torque. Direct
coupled to rotor and gear
reducer. Single phase
available as special.
Air compression..…Direct drive back curved fin impeller.
Electrical
Requirements………………...230 volt, 3 phase - 31 amp.
460 volt, 3 phase - 15.5 amp.
208 volt, 3 phase - 36 amp.
240 volt, 1 phase - 60 amp.
ROTATION
Drive…………………..Direct drive through a worm gear
box, coupled through a torque-
limiting device.
Speed………………………………………………3.5 RPM
ITEMS FURNISHED
Wood crated siren assembly with horn detached.
When specified, pre-assembled and wired control panel
cabinet with telephone relay or radio.
When specified, pole mount, roof mount or parapet mount.
ITEMS REQUIRED FOR INSTALLATION
Suitable mount (pole, platform, etc.) if not ordered with siren.
Electrical conduit and wire for interconnecting to control
cabinet and power source.
STORAGE
The unit is weather resistant as shipped and may be stored either
indoors or outdoors provided there is no danger of submergence in
water or other damaging fluids, or subject to possibility of vandalism.

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TOOLS AND TEST EQUIPMENT
Ordinary mechanics' tools and electrical tools are suitable for
installation of the siren assembly.
No test equipment is required for installation, except that it may be
desirable to have available an AC voltmeter or voltage indicating
device.
WARRANTY AND SERVICE
See separate warranty statement.
SAFETY PRECAUTIONS
LIFTING THE SIREN - Use a lifting device of adequate capacity.
Do not use the eyebolt for lifting if a pole or other mount is attached
to the siren. (See other information on lifting under heading
INSTALLATION.)
ELECTRICAL - During installation, prewire completely before
connecting to power source. Always disconnect from power source
before beginning any service or maintenance procedures. Only
qualified personnel should open the electrical control panel cabinet.
Refer to wiring diagrams and observe proper wiring procedures
during installation.
TESTING - CAUTION: Wear ear protectors! Anyone on the same
level- as or very close to the siren should wear ear protection during
operational tests. Prolonged exposure can cause ear damage.
INSTALLATION
GENERAL
To insure satisfactory operation, careful consideration must be given to
each of these factors:
1 - Site selection for optimum signal coverage
2 - Type of mounting
3 - Power supply requirements
4 - Provision for servicing
SITE SELECTION AND TYPES OF MOUNTING
Careful consideration must be given in selecting a site or sites for
installation. Locations should be plotted on local area maps to provide
the desired coverage. Generally, the highest possible site in the
selected area is the best location. This might be a building, tower or a
hill. Do not mount siren too high so that the sound goes over the top of
the area.
In lieu of a suitable existing structure for mounting, a cedar pole
approximately 40-50 feet long and sunk 8 feet deep is a generally
recommended mount. Refer to the illustrated mounting layouts for
details. Any tall building, trees, hills or other obstructions will tend to
create a barrier, which will produce a deadened area behind the
obstruction.
Figures I through 4 and 7 illustrate typical siren mounting
arrangements, which have been used successfully. These are Roof
Mount, Parapet Mount, Chimney Mount, Tower or Tank Mount and
Pole Mount. Figures 5, 6 and 8 show details of suggested supports and
platforms as well as erecting details.
Another general mounting recommendation that may be helpful is the
following: Determine the height of any building or obstruction within
150 feet of the siren. Keep the siren horn at least 5 feet higher than the
obstruction for best sound coverage. Remember that a siren
mounted too high will beam the sound over the top of the
required area.
ELECTRICAL POWER REQUIREMENTS
Adequate electrical power must be available at each siren site
(see SPECIFICATIONS for requirements). Local power
companies will charge extra if the siren is located more than 75
feet from the transformer.
NOTE
Line voltage fluctuations must not exceed ±10 percent
for specified performance (NEMA standard).
PROVISION FOR SERVICING
A convenient means of working on the siren for periodic
servicing must be provided at time of installation. When using a
pole mount, a platform should be constructed at the proper work
level. Refer to Figures 6 and 7 for platform suggestions.
If rungs or steps are provided for climbing up to a platform, it is
advisable to locate the lowest step at least 10 feet above the
ground to minimize the opportunity for vandalism.

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ROOF MOUNT (FIGURE 1)
The siren may be mounted as shown on a support or platform on a flat roof.
See Figure 5 for details of construction for a suggested roof mount. The siren
should be mounted higher than the highest snow level anticipated at the
installation.
PARAPET MOUNT (FIGURE 2)
Various custom-built mounts may be used similar to the parapet mount
illustrated. Actual design will be dictated by building construction and height
desired.
CHIMNEY MOUNT (FIGURE 3)
A sturdy chimney may provide a convenient support for mounting the siren.
The possibility of corrosive or staining smoke should be considered when this
type of installation is planned. Use 4" heavy wall galvanized pipe to a
maximum height of 10 feet above the top of the chimney. Use larger pipe for
greater height.
TOWER OR TANK MOUNT (FIGURE 4)
A properly situated tower or tank may serve as an ideal mount. The
support platform must be designed with adequate bracing to carry the
total load.

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INSTALLATION
MECHANICAL INSTALLATION
A sturdy mounting plate is provided in the sheltered area under the rotating
mechanism. A matching plate must be fabricated as part of the siren
mount. See Figures 5, 6 and 7 for details. The plate must have eight
equally spaced 9/16-inch holes on a 12-inch diameter circle. Mounting to
this plate is then accomplished by means of 1/2-inch bolts, nuts and lock
washers.
POLE MOUNT
Figure 7 illustrates a typical work platform with integral mounting plate.
The design and construction may be varied to suit conditions. The main
requisite is the ability to properly support the weight and wind load of the
siren assembly.
The electric control enclosure is usually mounted lower than the siren, but
at least 8 feet above ground level to discourage attempts at tampering.
Locate the enclosure for easy accessibility by qualified personnel.
IMPORTANT
Refer to Figure 9 for essential information on mechanical and electrical
installation.
ROOF MOUNT
The roof composition spacing of the rafters or beams and the load carrying
capacity must be known and considered. If the roof is capable of
supporting the siren (approximately 450 lbs.), no elaborate sub base is
necessary provided the installed horn height is adequate for the desired
sound coverage. In Snow Belt areas always mount above the highest snow
level expected.
If the roof composition and/or span loading present a problem, a sub base
should be used to distribute the weight. This base can consist of several 4
x 6 inch wood beams of sufficient length beneath the angle iron platform
(see Figure 5) to spread the roof loading.
LIFTING INTO POSITION
1. When the siren is mounted to the pole before lifting to the vertical
position:
a. Do not lift the entire siren and pole by the eyebolt on top of
the siren motor and do not let any weight rest on the
fiberglass parts of the siren.
b. The primary lift point is the pole and not the eyebolt on the
siren. The gear reducer end of the siren should lead the way
up as the siren and pole are raised to the vertical position (see
Figure 8).
c. The fiberglass horn may be assembled to the compression
chamber before erection provided no weight is put on the horn
and it does not interfere with erection.
d. With the pole and siren in final position, proceed with electrical
connections.
2. When the siren is separate from the pole or platform:
a. The primary lift point of the siren assembly is the eyebolt
located on top of the motor. This eyebolt is sturdy enough to
lift the 450 lb. siren safely in a vertical direction. Do not lift the
unit in this way if attached to a pole or platform mount.
b. With the siren mounted in final position, proceed with electrical
connections.
ELECTRICAL CONTROLS
The siren motor leads terminate under the sheltered rotating mechanism.
Attach an approved weatherproof type conduit box at this point.
All electrical controls needed for operating the siren are prewired and contained
inside a weatherproof metal enclosure, which should be mounted near the siren
in a position of easy access to authorized personnel, but out of easy reach of
unauthorized persons. Install conduit between the control box and the siren,
using wire adequate for the power requirements. Refer to Electrical-I
Requirements in Specification section.
IMPORTANT
Always enter electrical control and junction boxes from the bottom to
prevent leakage and water damage. (Refer to Figure 9.)
Control of the siren can be accomplished by either direct switch control,
program timer at the installation, remote control, radio encoder transmitter to
decoder receiver, or telephone lines, from a location different from installation.
The incoming signal actuates the magnetic starter, which, in turn, starts the
siren motor. The system provides thermal overload protection. Refer to wiring
diagrams.
Power for each siren is to be run from an ADEQUATELY FUSED
DISCONNECT SWITCH CONNECTED TO THE POWER SOURCE.
Additional disconnect switches may be required by code between the magnetic
starter and the siren.

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PRE-OPERATION CHECKS (Mechanical)
A - Gear reducer lubricant level.
B - Lubricant on gear reducer drive chain.
C - Final check all bolted or assembled components.
PRELIMINARY TEST
Prior to final wiring connection of Radio Decoder, Timer or
Telephone Relays and with power connected to the starter
controls, a check for proper motor rotation MUST be made.
1. Have one person observe the open siren air intake.
2. Momentarily energize the motor through the magnetic
starter contacts. Siren motor rotation should be
counterclockwise. If rotation is not correct, interchange line
one and line three on a three-phase siren.
FINAL WIRING AND TESTING (See Figures 11 through 14
and refer to wiring diagrams)
Connect the signal source wires to the magnetic starter control cabinet
terminal block. Proceed to test the entire operation of the siren using
the radio controls, timer or telephone system.
CAUTION
WEAR EAR PROTECTION. With the installation complete, the
siren SHOULD NOT BE ALLOWED TO SOUND FOR ANY
PROLONGED PERIOD (more than 30 seconds) while any person is
on the same level as the horn. Ear guards must be worn by personnel
on the same level as the horn as a precaution at all times during testing
or possible remote starting.
OPERATION
Actuation and control may be by means of remote direct-wired lines,
telephone lines and relays or special radio controls. The activating
and timing equipment, to be provided at time of installation, must be
specified when ordering the siren. This manual will not attempt to
define the exact operational procedure of the siren.
MAINTENANCE INSTRUCTIONS
LUBRICATION (See Figures 10 and 11)
NOTE
DISCONNECT POWER FIRST.
1. A self-aligning ball bearing is installed above the collector ring
assembly. This bearing is sealed for lifetime use and no additional
lubrication is necessary.
2. Another self-aligning ball bearing is installed under the base in the
center of the assembly. This bearing has an external grease fitting and
has been lubricated at the factory so no additional lubricant is necessary
for one year. When greased, one shot of the grease gun is sufficient. If
excess flows from the seals, remove it from inside the base with a rag.
Use Molub Alloy #171 graphite grease manufactured by the Imperial
Oil and Grease Co. or equivalent.
3. Oil in the gear reducer should be changed each year. Use high quality
SAE IOW-30 Motor oil and fill to oil level hole.
4. Before operating, check drive chain under circular base for protective
grease coating. If needed, grease with Molub Alloy #171 graphite
grease or equivalent. Do not over-grease. Check the setscrews in the
sprockets, collars and couplings when greasing the chain.
ADJUSTING DRIVE CHAIN TENSION
The rotation drive assembly is factory adjusted to provide slippage as a
precaution against possible component damage if a physical force prevents the
siren assembly from rotating. A torque adjustment is provided. (See Figure
11.) A quick torque check may be made by grasping the upper siren assembly
with both hands and attempting to rotate. Considerable force should be
required to rotate manually. If adjustment is necessary, turn the torque
adjustment nut to increase compression of spring.
CLEANING COLLECTOR RINGS
If the siren is inoperative and all electrical connections such as fuses,
overloads in the magnetic starter and circuits have been checked, inspect the
collector rings in the rotation assembly by removing the fiberglass hood. (See
Figure 11.)
CAUTION
Make certain the electrical power is off.
If the collector rings are discolored or have a dirt or oil film coating, polish
each ring with a fine crocus cloth. This can be accomplished by polishing the
portion of the ring near the opening, and then rotating the assembly by hand
far enough to expose another portion of the collector ring. Also check the
triggers on the brush holders to see if there is sufficient pressure on each brush
to maintain contact.

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TROUBLE-SHOOTING CHECK LIST
SYMPTOMS
A - Siren motor does not start and siren does not rotate.
POSSIBLE CAUSE CORRECTIVE PROCEDURE
1.No power to motor controls 1.Check fuses and power supply
2.Defective magnetic starter relay 2. Replace relay
3.Burned or pitted magnetic starter relay 3. Replace relay
contacts
4.Loose connections in control panel 4.Check and repair
5.Overload is kicked out on starter relay 5.Trace overload and correct the cause
6.Electric motor windings either open or 6.Test motor and replace
shorted
7.Remote actuating system defective 7.Trouble-shoot and correct
8.Worn collector rings or brushes 8.Replace
9.Dirty or corroded collector rings 9.Clean and polish
10.Loose connection on collector ring assembly 10.Trace and repair
11.Ice in siren rotor-stator 11.De-ice with hot antifreeze or hot air blower.
Do not use flame near fiberglass
B - Siren operates with difficulty or erratically.
POSSIBLE CAUSE CORRECTIVE PROCEDURE
1.Siren air intake clogged 1. Clear obstruction
2.Build-up of foreign material between siren 2. Disassemble housing and clean. Air gap
rotor and stator should be .025 inch or more.
3.Rotation mechanism binding 3. Inspect to determine cause and free-up or
replace defective parts
C - Siren sounds but does not rotate.
POSSIBLE CAUSE CORRECTIVE PROCEDURE
1.Foreign material jamming rotating 1.Clear obstructions
mechanism
2.Defective gear reducer 2.Replace
3.Broken jaw coupling 3.Replace
4.Loose setscrew on jaw coupling 4.Retighten
5.Improper torque adjustment on drive chain 5.Adjust torque spring to correct slippage
assembly
6.Chain slipping or off track 6.Adjust torque spring or replace chain
7.Broken drive chain 7.Repair broken links
8.Upper or lower bearing seized 8.Free-up and lubricate or replace

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INSPECTION
Since the siren is an emergency warning device which will get minimal 3.Inspect control panel door gasket and interior to determine
operational use, very little operational wear is to be anticipated. that no water leakage exists.
Periodic operational tests should be made to verify function ability. The
frequency of testing is considered to be a local option. Once every six 4.Remove fiberglass hood from motor compartment and
months, or at other optional intervals, perform the following inspections: check gear reducer oil level. Add or change as necessary.
Refer to MAINTENANCE INSTRUCTIONS under
1. Inspect external fiberglass surfaces for any physical damage. "LUBRICATION."
2. Inspect screened openings to determine that they are unobstructed 5.While fiberglass hood is removed, inspect collector rings and that
screens are securely fastened. brushes. Clean and polish as necessary.
If deeply scored or burned, replace rings and brushes. Refer to
MAINTENANCE INSTRUCTIONS under "CLEANING COLLECTOR
RINGS."
6. Inspect rotating chain drive mechanism under siren base. Apply grease and
check chain tension. Refer to MAINTENANCE INSTRUCTIONS under
"LUBRICATION" and "ADJUSTING CHAIN DRIVE TENSION."
DISASSEMBLY, REPAIR, REPLACEMENT AND REASSEMBLY
The siren' s physical design is such that it precludes most mechanical
problems other than those caused by natural disasters or violent physical
damage. The siren configuration is constructed from reinforced fiberglass and
bolted together to form a weatherresistant enclosure for all moving parts.
The parts drawing (Figure 15) illustrates component placement. Upon
removal of the fiberglass hood, the electric motor, gear reducer, jaw coupling,
collector ring assembly and torque adjusting spring are exposed to view. The
chain drive assembly is always accessible from the underside of the protective
base cover.
Disassembly procedures are extremely simple and will become obvious to the
mechanic, depending on the parts or components needing service. Ordinary
mechanics tools are adequate for all service work. Refer to MAINTENANCE
PROCEDURES for servicing and lubricating instructions.
PREPARATION FOR RESHIPMENT
Should the siren need to be relocated, the following procedures should be
followed:
1. Disconnect all controls and electrical connections.
2. Remove magnetic starter control cabinet.
3. Provide means of lifting the siren from its mount.
4. Unfasten from the mount and lower to the ground.
5. Horn may be removed for transporting or shipping.
6. Provide suitable shipping mount or crate.
STORAGE
No special precautions are necessary except that the unit should never be
submerged in water or other damaging fluids.

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PARTS LIST
FIGURE 12. THREE PHASE, TWO SIGNAL SIREN - CONTROL PANEL DETAIL AND PARTS
FIG. &
REF.
NO.
PART NO. CONTROL PANEL FOR 3 PHASE 2 SIGNAL SIREN
DESCRIPTION
NO.
REQ'D.
12- 20100 CONTROL PANEL ASSEMBLY, Complete REF
-1 20101 ENCLOSURE, NEMA 12 Furnas (for maometic starter 14EF32AC71) 1
-2 20102 PANEL, Interior mounting 1
-3 20103 STARTER, Magnetic, Furnas, size 1-3/4 NEMA 1
-4 20104 SWITCH, Operating (optional) 1
-5 20105 OVERLOAD, Bi-metal, 31. 5 amp for 230V siren 1
-6 20106 COUNTER, 230 volt (optional) 1
-7 20108 BLOCK, Terminal 1

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FIG. &
REF.
NO.
PART NO. CONTROL PANEL FOR SINGLE PHASE 2 SIGNAL SIREN
DESCRIPTION
NO.
REQ'D.
13- 20200 CONTROL PANEL ASSEMBLY, Complete REF
-1 20201 ENCLOSURE, NEMA 12 Furnas 1
-2 20202 PANEL, Interior mounting 1
-3 20203 STARTER, Magnetic, single phase, size 2 NEMA 1
-4 20204 OVERLOAD, Bi-metal, 60 axnp for 230V siren 2
-5 20205 RELAY, Current sensing (for No. 10234 motor) for start capacitor 1
-6 20206 CONTACTOR, Start 1
-7 20207 CAPACITOR, Start (for No. 10234 motor) 4
-8 20208 CAPACITOR, Run (for No. 10234 motor) 3
-9 20209 COUNTER, 230 volt (optional) 1
-10 20211 BLOCK, Terminal 1
-11 20212 SWITCH, Manual (optional) 1

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FIG. &
REF.
NO.
PART NO. CONTROL PANEL FOR 3 PHASE, YELP TYPE SIGNAL
DESCRIPTION
NO.
REQ'D.
14- 20300 CONTROL PANEL ASSEMBLY, Complete REF
-1 20301 ENCLOSURE, NEMA 12 Furnas (for magnetic starter 22EF32A71) 1
-2 20302 STARTER, Magnetic, Furnas, 1-3/4 size, reversing type (includes mounting panel) 1
-3 20303 SWITCH, Operating (optional) 1
-4 20304 OVERLOAD, Bi-metal, special type from A.C.A 3
-5 20305 COUNTER, 230 volt (optional) 1
-6 20306 BLOCK, Terminal 1

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PARTS LIST (CONT)
SIREN ASSEMBLY
FIG. &
REF.
NO.
PART
NO.
DESCRIPTION
NO.
REQ’D.
15- AL-125-1 HORN 1
-2A AL-125-2A CHAMBER, Compression 1
-2B AL-125-2B SCREEN, Outlet 1
-2C AL-125-2C SCREEN, Inlet 1
-3 AL-125-3 ROTOR, Siren 1
-4 AL-125-4 STATOR, Siren 1
-5 AL-125-5 END BELL, Motor-gear reducer 1
-5A AL-125-5A MOTOR (For 3/phase sirens - 230/46OV) 1
-5B AL-125-5B MOTOR (For 3/phase sirens - 208V) 1
-5c AL-125-5C MOTOR (For single phase sirens - 24OV) 1
-6 AL-125-6 SHAFT, Motor (specify motor type) 1
-6A AL-125-6A LOCK NUT, Motor shaft 1
-6B AL-125-6B LOCK WASHER, Motor shaft 1
-7 AL-125-7 GASKET, Motor conduit 1
-8 AL-125-8 CONDUIT ' Motor 1
-9 AL-125-9 REDUCER, Gear 1
-10 AL-125-10 COUPLING, Jaw type, 5/8 x 5/8 in 1
-11 AL-125-11 HOOD 1
-12 AL-125-12 SHAFT, Drive (with sprocket) 1
-12C AL-125-12C KEY, Drive shaft 1
-12D AL-125-12D GASKET 1
-13 AL-125-13 LIMITER ASSEMBLY, 'Torque (includes bushing and arm) 1
-14 AL-125-14 COLLAR, 5/8-in. I. D 1
-15 AL-125-15 SPRING, Torque setting 1
-16 AL-125-16 COVER, Chain 1
-17 AL-125-17 DRIVE ASSEMBLY, Base rotator 1
-17H Coml. CHAIN, Base rotator No. 35 standard, 68-11/16 in. plus 1 connector 1
-18 AL-125-18 BEARING ' Upper rotator, 1-1/4 in. I.D 1
-19 AL-125-19 Not applicable
-20 AL-125-20 Not applicable
-21A AL-125-21A RING ASSEMBLY, Collector, 3 ring (standard siren) 1
-21B AL-125-21B RING ASSEMBLY, Collector, 5 ring (siren with heater or valve) 1
-22 AL-125-22 Not applicable
-23 AL-125-23 Not applicable
-24 AL-125-24 Not applicable
-25 AL-125-25 BEARING ' Main rotator, 2-1/4 in. 1. D 1
-26 AL-125-26 ROD, Brush holder 2
-27 AL-125-27 INSULATOR, Brush holder 2
-28 AL-125-28 HOLDER, Brush 3
-28A AL-125-28A BRUSH 3
-29 AL-125-29 BASE 1
-29C AL-125-29C GASKET, Side panel (set) 2

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HARDWARE ITEMS (ZINC PLATED STANDARDS)
FIG. &
REF.
NO.
PART
NO.
DESCRIPTION
NO.
REQ’D.
15-H30 Coml. SCREW, Hex hd cap, 1/4-20 x 1 in 6
-H31 Coml. WASHER, External, star, 1/4 in 30
-H32 Coml. WASHER, Flat, 1/4 in 30
-H33 Coml. FASTENER, Jack nut, 1/4-20 6
-H34 Coml. SCREW, Hex hd cap, 5/16-18 x 3/4 in 6
-H35 Coml. WASHER, Internal- external, star, 5/16 in 6
-H36 Coml. WASHER, Flat, 5/16 in 6
-H37 Coml. SCREW, Hex hd cap, ½-13 x 1-1/2 in 4
-H38 Coml. WASHER, Internal- external, star, 1/2 in 5
-H39 Coml. NUT, Hex, 1/2-13 4
-H40 Coml. SCREW, Hex hd cap, 3/8-18 x I in 6
-H41 Coml. WASHER, Internal, star, 3/8 in 6
-H42 Coml. SCREW, Hex hd cap, 3/8-18 x 1-1/4 in 1
-H43 Coml. NUT, Hex, 3/8-18 8
-H44 Coml. SCREW, Hex hd cap, 3/8-18 x 1-1/2 in 1
-H45 Coml. SETSCREW, 5/16-18 x 5/16 in 2
-H46 Coml. NUT, Brass, No. 10-32 6
-H47 Coml. NUT, Hex hd jam, 1/2 -13 2
-H48 Coml. SCREW, Hex hd cap, 5/8 -11 x 2 -1/4 in 4
-H49 Coml. WASHER, Flat, 5/8 in 4
-H50 Coml. WASHER, Internal-external, star, 5/8 in 4
-H51 Coml. NUT, Hex, 5/8-11 4
-H52 Coml. FITTING, Grease, 45 degrees, 1/8 in. N. P. T 1
-H53 Coml. SCREW, Hex hd cap, 1/4-20 x 5/8 in 24
-H54 Coml. NUT, Half, 3/8-18 1
-H55 Coml. WASHER, Internal-external, star, 3/8 in 1
-H56 Coml. EYEBOLT, 1/2-13 1
-H57 Coml. WASHER, Flat, 1/2 in 1
This manual suits for next models
2
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