Rainbow Vacuum Model D3C Motor Design Parts

Original factory OEM replacement motor for the models D3C, D3A, D2A, D2 and D Rainbow.

If you upgrade to this motor, you should also purchase the revised R4100 separator, H555 separator nut, and a new R912 gasket. All items are listed under the "Related Items" tab.

*3 year limited warranty (Year 2 and 3 are prorated)

Stage assembly clip for the R2104 that came original in the model D3C Rainbow. The R2104 is the replacement motor for the D3A, D2A, D2, and D models.

Upper stage fan assembly for the bypass motor design on the D3C, D3A, and D2A model Rainbow.

Middle stage fan assembly for the bypass motor design that came standard on the D3C, D3A, and late version D2A model Rainbow.

Lower stage fan on the R2104 bypass motor design that includes a threaded hole for a ground screw.

This ground screw is used on the D3C, D3A, D2A, D2, and D model Rainbow.

On the bypass motor, this screw is used to ground the green wire from the power cord to the R1752 lower stage assembly.

On the non-bypass motor design, this screw is used to ground the green wire from the power cord to the motor housing and main housing on the metal D2, and D Rainbow.

Air guide for the model D3C, D3A, and late version D2A model Rainbow. First stationary fan that fits on the bearing plate.

Original factory OEM bearing plate for the model D3C Rainbow.

NOTE: Does not fit the original motor that came in the model D3A.

Cork gasket that fits under the bearing plate and seals bearing plate to the motor housing.

Fits models D3C, D3A, D2A, D2, and D Rainbow.

Grommet for the D3C, D3A, D2A, D2, and D model Rainbow vacuum. Helps prevent the wires from rubbing on the motor housing.

Ring terminals for the R1753 electric cord and R1582 power nozzle receptacle.

This wire clamp is used on the D3C, D3A, and D2A bypass motor design. It clips onto the field wire inside the motor housing and is pushed down beside field and housing to keep wire in place.

Factory OEM field for the model D3C and late version D3A. Will work with the R1974 armature and R1909 armature.

Insulation that is located around the field inside the motor housing for the D3C, D3A, and D2A model Rainbow.

Original factory OEM replacement armature for the model D3C Rainbow.

If you have a D3A, D2A, D2, or model D Rainbow and have had the motor replaced at some point, then you may have the R2104 motor that this armature is standard. The R2104 motor is the only option for all models listed.

Effective serial number 4607000 with a start date of June 5th 1982.

Main bypass motor housing for the D3C, D3A, and late version D2A model Rainbow.

Bearing boot for the D4C SE (Special Edition), D4C, D3C, and D3A Rainbow vacuum.

The second image shows the old version (left) that has a smaller hole and can only be used on the D3A or D3C motor. If you have a mix of parts, do not use the old design on a D4C model Rainbow.

If you are unsure then all new inventory has the larger hole and allows for use on both the D3 series and D4 series.

Original OEM factory bearing for the model D4 SE (Special Edition), D4, and D3C Rainbow system. On the D4 SE (Special Edition) and D4, this bearing is located on top of the armature in the bearing bridge and also in the motor base assembly. The metal shield is installed towards the carbon brushes.

When installed in the model D3C motor, this bearing is located in the bottom motor housing. Again the metal shield is installed towards the carbon brushes.

The slinger ring is a common replacement part due to the high chance of rust and low cost of replacement.

Replacement bearing shied for the model D3C R2104 motor design.

This motor shaft nut is the same for all model D3C, D3A, D2A, D2, and D motor design. Reverse thread nut so be careful when installing and removing to be sure not to damage.

Over tightening can cause the snap rings to be pressed out of their slots and cause a spacing issue which will cause the motor to bind.

Upper spacer for the R2104 motor in the model D3C Rainbow vacuum. This spacer is shorter than the bottom spacer and is the last item to install before the shaft nut.

Rotating fan for the D3C R2104 motor. Sometimes if your motor has a lot of corrosion, then the center of this fan can be weak and easily break out.

Middle spacer for the R2104 motor in the model D3C Rainbow vacuum. This spacer looks like an hourglass.

Lower spacer for the R2104 motor in the model D3C Rainbow vacuum. This item is the first part you would install when assembling the fans. It is slightly thicker than the top spacer.

This is the pan head screw for the bearing plate on D3C, D3A, D2A, D2, and D model Rainbows. If these screws are even the least bit rusty, then you might want to revisit your owner's manual and refresh yourself on proper storage and use.

Retaining ring for the D4C R3242 motor and D3C R2104 motor design. This is a good item to replace as many times this part gets sprung and does not hold tight onto the armature shaft.

You will need snap ring pliers to install and remove.

Motor cooling fan for the model D3C that is held onto the armature shaft by a snap ring.

Small spacer the fits under the motor cooling fan that is held down by a snap ring.

Plastic shell that installs over the motor housing on the by-pass motor design. Airflow goes between this item and the motor housing and is what directs the air outside the motor housing and is why this design is called a by-pass motor.

Original field screw for the model D3C, D3A, and D2A version Rainbow. Course thread for contact with the R1449 Insulator-Field Screw Insert.

Rubber lower shell gasket for on the bypass motor design. Helps prevent air leaks to give the motor maximum performance.

D3A, D2A, D2, and model D motor fields have spade connections for the R662 brush holders. This kit allows you to convert over the terminals to allow the use of the R2421 and R2420 brush holder kit.

Cork gasket for the D3C, D3A, D2A, D2, and D motor housing for use with the carbon brush holders. Helps reduce air leaks to keep maximum performance.

Original factory OEM brush holder for the R2104 design D3C motor. Always a good idea to replace if you see any blistering or burnt damage.

Effective serial number 4607200 with a start date of May 5th 1982.

This is the replacement screw that holds the carbon brush holder into the motor housing. A total of four are used in the bypass and non-bypass motor design that are used in the model D3C, D3A, D2A, D2, and D Rainbow.

This item is sold each. If you need a pair to replace both sides on your motor, then please add a quantity of two to your cart.

Original factory OEM carbon brush for the D4C and D3C Rainbow. Be sure to measure and confirm you are ordering the correct size. (.4955 or just less of 1/2 inch).

Effective through serial number 7520714. The R5125 is the carbon brush that you need if your serial number is higher or if your measurement is larger. Check the "Related Items" tab for an R5125.

* SELECT OPTION: This item needs to be "seated" for proper life expectancy. We use a variable transformer (variac) to seat the brushes. If you are unable, we offer this as an optional service.

• Not properly seating in the carbon brushes can cause brush and commutator damage leading to costly maintenance and downtime
• By properly seating in the carbon brushes, it allows you to use rated current almost immediately
• Change all carbon brushes at one time
• Vacuum excess carbon dust to prevent from reaching machine windings and bearings

The M596 Seating Stone is only used to "clean up" the commutator of the armature and not meant to "seat" the brushes. If you are not exactly sure how to "seat" your carbon brushes, the service fee that we charge is well worth it in the long run.

If you do not seat the motor brushes, you can expect about a one year life before they wear out.

Retainer for the cover plate on the side of the motor housing. Fits the D3C, D3A and late version D2A bypass motor design.

Cover plate for the by-pass motor design that came factory in the late version D2A and all motor versions in the D3C and D3A.

Cover plate gasket for the R2104 version motor that was in the D3C, D3A, and late D2A model Rainbow.

Field screw insert for the model D3C, D3A, and D2A model Rainbow vacuum.

The air deflector is a common item to replace. This item is pressed into place so removal will damage and require a new install.

Fits D3C, D3A, and D2A model Rainbows. Use the R747 flange to hammer this into the motor housing.

This screw is used to hold slinger ring and bearing shield into motor housing. It is used on the bypass and non-bypass design that came original in the model D3C, D3A, D2A, D2, and D Rainbow. In many cases this part is rusted.

This item has had several upgrades over the years since it was first introduced with the Special Edition model D4C Rainbow.

It was originally a gray color matching the original separator. Then it changed to a yellow-tan color that matches the current R4100 separator. Then if finally was redesigned from the cone shape to what it looks like today. It was also at that time when it became black in color. No matter which version you have, this is a direct factory OEM replacement.

The spider sets under the separator and works directly with the separator. This spider and the R4100 separator was one of the upgrades that were done when the D4C Special Edition (SE) was introduced in 1990.

This has to be purchased as a kit if you are replacing an original R1976 spider from a model D4C or D3C Rainbow. If you have an R1976 currently, then order an R4100, R4101 and H555.

The armature shaft nut is installed after the spider and should almost always be replaced anytime any repair has been done. Be sure to clean threads on the armature shaft with a wire wheel or wire brush if that is all that is available.

This nut holds the separator in place on all D3 and D4 model Rainbows.

For a short period on the model D4, this nut had an open top and allowed you to use a flat screwdriver to hold the motor in place. The problem with this design was that it allowed water to get on the threads and seize the nut to the motor shaft. Replace if you are able to see the end of the motor shaft in your machine.

This nut fits the older style R312 separator. Be sure to look at the image closely as the other types of separator nuts have a flat base and do not work correctly with the R312 plastic separator. If you have a metal separator, then please order an H555 that has the flat base.

This standard separator nut for the R4100 separator comes factory standard on the model D4C SE (Special Edition) Rainbow. Do not use on the R312 separator that comes standard on the original D4C or older units.

This item fits model D4C, D3C, D3A, D2A, D2, and D. On the model D4C and D3C, you must have the original R1976 spider that came standard for this to fit correctly.

On March 28th 2002, Rexair discontinued production on this item and also the matching R1976 spider. We realize that many people still have the model D4C and D3C Rainbow system, so we offer used as a solution.

If you need to replace both separator and spider, then you would order item numbers R4100, R4101, and H555. These three items are a direct replacement and also an improvement.

The separator separates the air from the water. The water is thrown back into the water pan and it allows clean air to go up through the motor and out the exhaust. Be sure to take off and clean periodically as it can become clogged with dirt and will reduce your performance.

If you have a plastic separator that does not have a metal band around the outside edge, at some point the separator may break into pieces during use. The metal band was added to prevent this issue from occurring.

The separator is one of the most important parts on the Rainbow cleaning system. It throws the water back into the water pan and allows clean water washed air to travel up through the motor and out the exhaust. Be sure to take off and clean as it can become clogged with dirt and debris.

If your model is the D4 SE (Special Edition) with the R4101 spider, then this is the current revision. If you have a D4 or D3C, then you would also need to order the R4101 and H555.

All parts can be viewed by clicking on the "Related Items" tab above.