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Motors

 

 AMETEK MOTORS
 

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As well as the range of motors listed below, other models and spare parts - brush mechanisms, armatures, fans, etc. are also available ex-stock.

Ross Brown Sales Pty Ltd always recommend that our electric motors be installed by or under the supervision of a licenced electrician. Click Here to download the Operating and Installation Instructions for Lamb Bypass Vacuum Motors.

For any special motor requirements please contact our Sydney office, Email sales@rossbrownsales.com.au or phone (02) 9899 2744.


109mm and 145mm Diameter Through Flow Motors
123mm and 145mm Diameter Bypass Motors - Peripheral Discharge
145mm Diameter Bypass Motors - Tangential Discharge
183mm Diameter Bypass Motors
191mm Diameter Bypass Motors
Low Voltage D.C. Vacuum Motors

Additional Information about AMETEK Lamb Motors...
Bypass Motor Ventilation
Operation of Vacuum Motors in Air Series
Carbon Brush Consumption
Changing Carbon Brushes

 


Vacuum Motors Product Catalogue Vacuum Motors Product Catalogue



109mm and 145mm Diameter Through Flow Motors
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Product Code Description  
     
  • 7610070

 

Model 116379-00 Model 116379-00

Model No. 116379-00

109mm; 2 Stage; Through Flow Discharge; 900 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Provision for grounding
     
  • 7610141

 

 

Model 119621-00 Model 119621-00

 Model No. 119621-00

145mm Diam; 1 Stage; Through Flow; Fitted with Thermal Protector; 850 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 HZ
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Thermal protection, automatic reset
     
  • 7610150

 

 

Model 119748-00 Model 119748-00

 Model No. 119748-00

130mm Diam; 1 Stage; Through Flow; 850 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 HZ
  • UL recognised
  • Provision for grounding
  • Skeleton frame design, cup design
  
     
  • 7610163

 

 

Model 119996-00 Model 119996-00

 Model No. 119996-00

145mm Diam; 1 Stage; Through Flow; 1200 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 HZ
  • UL recognised
  • CSA certified
  • Provision for grounding
  • Skeleton frame design


     
  •  7610164

 

 

 

 

 

Model 119998-08 Model 119998-08

 Model No. 119998-08

145mm Diam; 2 Stage; Through Flow; 1700 Watt

Special Features;

  • 660 Peak Air Watts
  • Patented Advantek II diffusion
  • 3" Commercial Lamination
  • Dual Tapered fan system
  • Provision for grounding
  • Top end mounting boss
  • Thermal Device
  • UL recognised
  • Suitable for 120 volt AC operation, 50 or 60 Hz

  

 
     
  • 7610056

 

 

Model 116311-10 Model 116311-10

 Model No. 116311-10

120V, 145mm Diam; 2 Stage; Through Flow; 900 Watt

Special Features;

  • Suitable for 120 volt AC operation, 50/60 Hz
  • UL recognised
  • CSA Certified
  • Provision for grounding
  • Skeleton frame design
     
  •  7610078

 

 

Model 116604-00 Model 116604-00

 Model No. 116604-00

145mm Diam; 2 Stage; Through Flow; Fitted with Thermal Protector; 1200 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Thermal protection, automatic reset
  • Provision for grounding
  • Skeleton frame design
     
  •  7610142

 

 

Model 119623-00 Model 119623-00

 Model No. 119623-00

145mm Diam; 2 Stage; Through Flow; 850 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding
  
     
  •  7610146

 

 

Model 119655-00 Model 119655-00

 Model No. 119655-00

145mm Diam; 2 Stage; Through Flow; 1100 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding

     
123mm and 145mm Diameter Bypass Motors -
 Peripheral Discharge  
     
  •  7610098

 

 

Model 117304-50 Model 117304-50

 Model No. 117304-50

123mm Diam; 2 Stage; Peripheral Bypass; 800 Watt

Special Features;

  • Suitable for 230 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding
     
  •  7610054

 

 

Model 116340-00 Model 116340-00

 Model No. 116340-00

145mm Diam; 1 Stage; Peripheral Bypass; 850 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding
  • High air flow fan system
     
  •  7610148

 

 

Model 119656-00 Model 119656-00

 Model No. 119656-00

145mm Diam; 2 Stage; Peripheral Bypass; 1100 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Open frame design
  • Provision for grounding
     
  •  7610060

 

 

Model 116354-13 Model 116354-13

 Model No. 116354-13

145mm Diam; 2 Stage; Peripheral Bypass; 1400 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding
     
  •  7610052

 

 

Model 116296-13 Model 116296-13

 Model No. 116296-13

145mm Diam; 2 Stage; Bypass ACUSTEK; 1100 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding
  • ACUSTEK® low noise design


     
145mm Diameter Bypass Motors - Tangential Discharge  
     
  •  7610018

 

 

Model 115961 Model 115961

 Model No. 115961

145mm Diam; 2 Stage; Tangential Bypass; 1200 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding
  • Epoxy painted fan case
  
     
  •   7610143

 

 

Model 119625-00 Model 119625-00

 Model No. 119625-00

145mm Diam; 2 Stage; Tangential Bypass; 1200 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding
  • Epoxy painted fan case
  
     
  •   7610045

 

 

Model 116213-00 Model 116213-00

 Model No. 116213-00

145mm Diam; 2 Stage; Tangential Bypass; 1100 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding
  • Epoxy painted fan case
  
     
  • 7610152

 

 

Model 119678-00 Model 119678-00

 Model No. 119678-00

145mm Diam; 2 Stage; Tangential Bypass; 1700 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding
  • Tapered fan system
  
     
  • 7610096

 

 

Model 116859-13 Model 116859-13

 Model No. 116859-13

145mm Diam; 3 Stage; Tangential Bypass; 1200 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Skeleton frame design
  • Provision for grounding
     
  • 7610097

 

 

 Model No. 116859-29

145mm Diam; 3 Stage; Tangential Bypass; Fitted with Inlet Tube; 1200 Watt
     
  • 7610109

 

 

 

Model 117123-00 Model 117123-00

 Model No. 117123-00

145mm Diam; 3 Stage; Tangential Bypass; 1500 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • 10mm shaft and bearing system
  • Skeleton frame design
  • Provision for grounding
  • Aluminium fan end bracket designed to dampen vibration and improve durability
  • 7610110

 

 

Model 117246-00 Model 117246-00

 Model No. 117246-00

145mm Diam; 4 Stage; Tangential Bypass; 1400 Watt

Special Features;

  • Suitable for 230 volt AC operation, 50/60 Hz
  • UL recognised
  • 10mm shaft and bearing system
  • Special fans designed for high pressure/low volume operation
  • Provision for grounding


     
183mm Diameter Bypass Motors    
     
  • 7610008

 

 

Model 115963 Model 115963

 Model No. 115963

183mm Diam; 2 Stage; Peripheral Bypass; 1500 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Provision for grounding
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
  • 7610012

 

Model 115684 Model 115684

 Model No. 115684

183mm Diam; 2 Stage; Tangential Bypass; 1200 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • Provision for grounding
  • Epoxy painted fan case
  • UL recognised
     
  • 7610016

 

 

Model 115950 Model 115950

 Model No. 115950

183mm Diam; 2 Stage; Tangential Bypass; 1500 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • Provision for grounding
  • Epoxy painted fan case
  • UL recognised
     
  • 7610103

 

 

 

Model 117572-12 Model 117572-12

 Model No. 117572-12

183mm Diam; 2 Stage; Tangential Bypass; 1500 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Provision for grounding
  • 10mm shaft and bearing system
  • Non loading fans
  • Epoxy painted fan case
  • Aluminium fan end bracket designed to dampen vibration and improve durability
     
  • 7610034

 

 

 Model No. 116138-00

183mm Diam; 3 Stage; Peripheral Bypass; 1100 Watt
     
  • 7610032

 

 

 

Model 116136-00 Model 116136-00

 Model No. 116136-00

183mm Diam; 3 Stage; Tangential Bypass; 1400 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Provision for grounding
  • 10mm shaft and bearing system
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
  • 7610108

 

 

Model 117743-13 Model 117743-13

 Model No. 117743-13

183mm Diam; 3 Stage; Tangential Bypass; 1400 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Provision for grounding
  • 10mm shaft and bearing system
     
  • 7610105

 

 

Model 117502-13 Model 117502-13

 Model No. 117502-13

183mm Diam; 3 Stage; Tangential Bypass; 1600 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Provision for grounding
  • 10mm shaft and bearing system
  • Epoxy painted fan case

     
  • 7610174

 

 

 

Model 122172-18 Model 122172-18

 Model No. 122172-18

213mm Diam; Tapered Single Stage; Tangential Bypass; 1700 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Provision for grounding
  • 10mm shaft and bearing system
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
191mm Diameter Bypass Motors    
     
  • 7610005

 

 

Model 114789 Model 114789

 Model No. 114789

191mm Diam; 3 Stage; Peripheral Discharge; 1000 Watt

Special Features;

  • Suitable for 240 volt AC operation, 50/60 Hz
  • UL recognised
  • Provision for grounding
  • High air flow fan system
     
Brushless Motors    
     
  • 7610170

 

 

 

Model 121102-13 Model 121102-13

 Model No. 121102-13

145mm Diam; 2 Stage; Peripheral Bypass; 1300 Watt

Special Features;

  • "Generation II" (Digital) Controller; no external low voltage control power required
  • UL component recognised (pending)
  • IP Rating; 1.0
  • Speed control capability
  • Tapered fan system
  • Thermally protected motor design
  • Patented air seal bearing construction

     
  • 7610171

 

 

 

Model 121114-13 Model 121114-13

 Model No. 121114-13

183mm Diam; 2 Stage; Tangential Bypass; 1400 Watt

Special Features;

  • "Generation II" (Digital) Controller; no external low voltage control power required
  • UL component recognised (pending)
  • IP Rating; 1.0
  • Speed control capability
  • Tapered fan system
  • Thermally protected motor design
  • Patented air seal bearing construction

 

 

    
  • 7610173

 

 

 

Model 121131-00 Model 121131-00

 Model No. 121131-00

231mm Diam; 1 Stage; Tangential Bypass; 1500 Watt

Special Features;

  • "Generation II" (Digital) Controller; no external low voltage control power required
  • UL component recognised (pending)
  • IP Rating; 1.0
  • Speed control capability
  • High CFM fan system
  • Thermally protected motor design
  • Aluminium fan end bracket designed to dampen vibration and improve durability
         

 
     
Low Voltage DC Vacuum Motors    
     
  • 7610038

 

 

Model 116155-00 Model 116155-00

 Model No. 116155-00

24V DC; 145mm Diam; 2 Stage; Peripheral Discharge; 350 Watt

Special Features;

  • Suitable for 24 volt DC operation
  • UL recognised
  • Provision for grounding
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
  • 7610120

 

 

 

Model 116598-13 Model 116598-13

 Model No. 116598-13

24V DC; 145mm Diam; 3 Stage; ACUSTEK Low Noise Peripheral Bypass; 550 Watt

Special Features;

  • Suitable for 24 volt DC
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Epoxy painted fan case
  • Patented air seal bearing construction
  • ACUSTEK low noise design

 
     
  • 7610042

 

 

 

Model 116157-00 Model 116157-00

 Model No. 116157-00

24V DC; 145mm Diam; 2 Stage; Tangential Bypass; 400 Watt

Special Features;

  • Suitable for 24 volt DC operation
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Epoxy painted fan case
  • Patented air seal bearing construction
  
     
  • 7610113

 

 

 

Model 116515-13 Model 116515-13

 Model No. 116515-13

24V DC; 145mm Diam; 3 Stage; Tangential Bypass; 550 Watt

Special Features;

  • Suitable for 24 volt DC operation
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Epoxy painted fan case
  • Patented air seal bearing construction
  
     
  • 7610114

 

 

 

Model 116515-29 Model 116515-29

 Model No. 116515-29

24V DC; 145mm Diam; 3 Stage; Tangential Bypass; 38.1mm Diam; Inlet Tube; 550 Watt

Special Features;

  • Suitable for 24 volt DC operation
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
  • 7610072

 

 

 

Model 116406-13 Model 116406-13

 Model No. 116406-13

36V DC; 145mm Diam; 2 Stage; Peripheral Bypass; 550 Watt

Special Features;

  • Suitable for 36 volt DC operation
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
  • 7610074

 

 

 

11640913.pdf 11640913.pdf

 Model No. 116409-13

36V DC; 145mm Diam; 2 Stage; Peripheral Bypass; 550 Watt

Special Features;

  • Suitable for 36 volt DC operation
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
  • 7610079

 

 

 

Model 116512-13 Model 116512-13

 Model No. 116512-13

36V DC; 145mm Diam; 3 Stage; Peripheral Bypass; 650 Watt

Special Features;

  • Suitable for 36 volt DC operation
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
  • 7610080

 

 

 

Model 116513-13 Model 116513-13

 Model No. 116513-13

36V DC; 145mm Diam; 3 Stage; Tangential Bypass; 650 Watt

Special Features;

  • Suitable for 36 volt DC operation
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
  • 7610081

 

 

 

Model 116406-13 Model 116406-13

 Model No. 116406-13

36V DC; 145mm Diam; 3 Stage; Tangential Bypass; 650 Watt

Special Features;

  • Suitable for 36 volt DC operation
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
  • 7610139

 

 

 

Model 119432-13 Model 119432-13

 Model No. 119432-13

36V DC; 145mm Diam; 3 Stage; Tangential Bypass; 650 Watt

Special Features;

  • Suitable for 36 volt DC operation
  • UL recognised
  • Provision for grounding
  • Skeleton frame design
  • Epoxy painted fan case
  • Patented air seal bearing construction
     
Bypass Motor Ventilation
   

Proper ventilation of bypass vacuum motors in cleaners and other appliances is critical to attaining their design life. This is a critical design consideration in the application of Lamb bypass vacuum motors. This discussion is not intended to be critical of any particular appliance. Rather, it puts forth considerations to be taken into account in the application of Lamb bypass vacuum motors in appliances.

The most common problem encountered is recirculation of the cooling air where there is not a positive separation between the cooling air inlet and discharge areas. By using heated air to cool the motor, it can run at elevated temperatures and thus can shorten the life expectancy of the unit. While the appliance may pass temperature tests at agencies with this condition, the elevated temperature caused by the recirculation can put the motor at risk of premature failure.

Care must be taken to prevent recirculation of cooling air. Many effective methods have been employed to prevent recirculation of ventilation air. These include using foam rings and other sealants between the vent fan housing and the appliance body, having the motor extend outside the unit housing, etc. It is important to ensure that only cool, ambient air is used for motor cooling. The discharge air should be directed away from the cooling air inlet to ensure that outside ambient air only is used for cooling.

Another common problem is the result of restricted inlet or discharge area for the ventilation air. Lamb recommends that a minimum of 3 square inches of area be allowed for both the inlet and discharge of the cooling air. If this area is not provided, the motor temperature can be effected to the point that it will run hotter than normal and can result in premature failure.

The appliance should be installed or used in an area where the ambient temperature in not elevated to high levels. For a central vacuum cleaner, such areas as small closets, attics, garages can have very high ambient temperatures that will create problems for the motors in operation.

Continued operation of the vacuum motor at very high temperatures can lead to premature failure. One of the most common problems seen is bar movement of the commutator. Commutator construction varies but most of the units that Lamb uses have the bars held in place with a moulding compound. These commutators are very durable and have been highly reliable when the operating temperatures of the motors are within agency limitations.

However, high ambient temperature can cause a bar on the commutator to move slightly. When this happens the carbon brush can jump slightly on each revolution of the armature. This causes excessive arcing at the brushes and this leads it turn to increased temperature. Once this starts, the motor generally fails prematurely. Other potential problems of high temperature motor operation is increased dusting of the brushes (also a factor of raised commutator bars) and the possibility of armature shorts.
 
Operation of Vacuum Motors in Air Series
It is possible to connect two vacuum motors in air series by connecting they discharge of the first motor to the inlet of the second motor to increase the overall vacuum level in a cleaning machine. We have a number of customers that utilise motors in this manner in various types of equipment.

There are potential problems associated with the air series application of motors as it produces a severe thermal condition on the second motor. The discharge air from the first motor is quite warm and when it is ducted to the second motor, the heated air increases further in temperature due to the compression of the air in the vacuum system.

The high temperatures can have an adverse effect on the bearing system of the second motor. In addition, the high temperatures coupled with the increased pressure in the second motor can cause the grease to be forced out of the ball bearing at the bottom (fan end) of the second motor.

Depending on the effective operating orifice of the vacuum system, enough heat can be generated to cause deformation of the fan system that can lead to a fan strike or locked rotor condition.

Another problem is the electrical current required to operate the air series vacuum system. Special wiring assemblies and circuits may be necessary to carry the high current level when operating two motors in air series.

When two like motors are connected in air series, the sealed vacuum level will increase by approximately 60% from that of a single motor. Airflow at a wide open condition does not appreciably increase by operating two vacuum motors in air series.

Another problem frequently seen in air series applications is that adequate cooling air is not provided for the first or lower motor. Both motors must receive cooling air directly from outside the motor enclosure and there must not be any recirculation of motor cooling air. If the motors are not properly cooled, severe thermal problems can develop in the motors.

Applications using vacuum motors connected in air series should be thoroughly tested to ensure the integrity of your design. There are potential problems with this type of application as noted above and these must be fully understood. Air series installations might have an adverse effect on the life of the motors and the reliability of your equipment.
Carbon Brush Consumption
In the process of commutation, the carbon of the brushes is consumed. Some of this material is consumed in the maintenance of the film of carbon on the commutator. Most of the carbon is abraded away and escapes in the air stream. When a motor is running well, the dusting is minimal because consumption per hour is low, and the concentration of the dust in the air stream at any time is minimal.

When a motor is commutating poorly, carbon is being consumed at a faster rate. This could be as the film on the commutator is built up and then torn down as the resins and binders are cooked out of the brush by excessive heating. It also could be as the result of friction as could be the case if the comm had a poor finish or there was movement of a bar. In these cases, more carbon is being used per hour and it is discharged into the ventilation air stream.

In a typical central vacuum system, there is generally a lot of static electricity built up in the PVC pipe by the movement of air and debris through the system. The pipes attract the carbon dust that has been discharged into the air stream and thus the coating on the pipes. Carbon dust is a natural by product of running a vacuum motor. It will always be there by nature of the machine.

There is a growing trend in the European market to place filters on the discharge air to trap carbon dust and other dust in the air going through the vent system. This could prevent a large portion of the carbon dust from escaping from the power unit.

If the area where the unit is installed is very dry, i.e. high altitude, low humidity, etc., this could contribute to the dusting on the pipes. We have seen a number of installations in Scandinavia where there was a lot of carbon dust on the pipes, especially during the Winter.

Another idea that could assist would be to wrap the pipes in the area of the power unit with bare copper wire and connecting it to ground. This would discharge the static charge in the pipes and reduce the attraction point for the airborne carbon dust. However, in this case, if the static charge is removed from the pipe, the carbon dust will be free to go anywhere the discharge air goes and will not be collected on the pipe.

It is important to check the operating condition of the vacuum motor if excessive dusting is observed as this condition could be the cause of some other mechanical or electrical problem.

Dusting of the carbon brush material is normal for a vacuum motor. If there is very high static charge levels in the pipe, the carbon dust can collect more quickly on the pipes as well as on the power unit. The same dusting is present with canister and other vacuum motors. However, since there is not the build-up of static charges as in a central vacuum cleaner with plastic duct pipes, the carbon dust is discharged back into the air in the area being vacuumed.
Changing Carbon Brushes
The following steps should be followed when changing the carbon brushes on Lamb vacuum motors. For best results, always use original Lamb replacement parts.

1. Disconnect motor from the power source and remove vent fan cover if the unit is a bypass design.
2. Insert a standard blade screw driver between the top of the brush mechanism and the brush lead wire clip and gently tap the screw driver handle until the clip touches the commutator. Some models have blade terminals on the brush holder. For these units, remove the connector from the blade terminal.
3. Remove the brush clamp screws with a Phillips screw driver.
4. Once the brush mechanism is free, generally the brush clip can be removed the rest of the way by hand.
5. To install new brush mechanism, first insert the brush clip into the end of the brush mechanism between the nylon insulator and the brass and push in straight by hand. Then use needle nose or standard flat blade pliers to gently seat the clip. For the units with the blade terminal, push the connector on to the terminal.
6. Insert the locator tab on the bottom of the brush mechanism into the corresponding hole on the top of the commutator end bracket and secure the mechanism with the brush clamp and the screws that were earlier removed.
7. To properly seat the carbon brush on the commutator, operate the motor at half voltage for about 30 minutes and then operate the motor at full voltage for an additional 30 minutes.

 

 
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