Reinstall the armature assembly. Insert the armature assembly into the gear case (rotate the assembly until the pinion gear engages the bevel gear). Align the tabs on retainer plate with the slots on the gear case.
Full Answer
What causes armature failure?
Worn commutators are one of the most common causes of armature failure. When commutators become worn or damaged, they wear down carbon brushes much quicker which can result in a damaged or destroyed armature.
How do you resurface an armature?
1:133:27DIY: How to Clean the Commutator of an Armature - YouTubeYouTubeStart of suggested clipEnd of suggested clipHolding the armature in one hand wrap the sandpaper around the commutator. Light pressure turn theMoreHolding the armature in one hand wrap the sandpaper around the commutator. Light pressure turn the commutator. And a full rotational motion and not just back and forth.
How do you fix a burnt armature?
1:494:11Easy Power Tool Fix: Burnt Commutator - YouTubeYouTubeStart of suggested clipEnd of suggested clipThis is some thousand grit sandpaper. I'm just going to twist this in circles. Around here slowlyMoreThis is some thousand grit sandpaper. I'm just going to twist this in circles. Around here slowly get rid of that row. But you don't want to just sand the one spot. And end up with a flat spot.
Can a commutator be repaired?
Mold-type commutators are not repairable and must be replaced if damaged. When a commutator comes in for a repair, units are disassembled and rebuilt with new copper and mica segments using the same quality assurance processes applied to new commutators.
How do I stop the commutator from sparking?
Excessive sparking may be due to worn brushes, resulting in reduced spring pressure, or due to roughness of the commutator segments (test with a finger ..... with the power OFF!), or perhaps carbon dust between the commutator segments. If you do use sandpaper, use only the finest grade on the commutator.
Which paper is used for cleaning of commutator?
Helwig Carbon stocks several sizes of Garnet Commutator Paper for proper seating of your carbon brushes. It's non-conductive and is used for pre-shaping carbon brushes and cleaning commutator surfaces.
Can I fix a burnt motor?
If an electric motor operates at too high a voltage, excess current flowing through the windings can cause them to become hot and burn out. While it is normally not practical to repair small, direct current (DC) motors that have burned out, other motors can be repaired by rewinding.
What causes a burnt commutator?
Slot bar marking or burning In certain situations this is made worse, electrical overload, an incorrect neutral setting, contamination or an improper interpole strength can be factors. Resurfacing the commutator will be required if the trailing edges of the darker bars looks to be etched or burnt.
What causes sparking at the brushes?
Any physical damage to the holder or an accumulation of dirt on its inside may interfere with the free motion of the brush in the holder and thus result in sparking. Since the commutator is seldom perfectly round or concentric, the brush must move in and out of its holder in order to maintain effective contact.
How do you test an armature?
1:403:57DIY: How to Test an Armature of a Motor - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe multimeter in the same setting touch the one probe on the one bar. And then the other probe onMoreThe multimeter in the same setting touch the one probe on the one bar. And then the other probe on the adjacent bar. Then take note of the reading on the multimeter. Continue.
How do you clean a commutator?
Step 1: Prep. Clean the commutator using a toothbrush and contact cleaner. ... Step 2: Resurfacing. Next we will be resurfacing the commutator, removing any pitting, marks left from arcing, imbedded dirt, etc. ... Step 3: Final Clean-up. After that, give the commutator a final clean up with contact cleaner. ... Step 4: All Done!
Why commutators are sparking heavily?
Commutators are sparking heavily due to the following reasons: Sparking can be induced by various conditions like motor overload, vibration, increased humidity, worn brushes and worn commutators.
How do I know if my armature is bad?
Signs of a bad armature Burnt-out armature: It may be the result of several issues like poor airflow, overloading, stalling, earthing, insulation breakdown, regulator failure, and so forth. If a burnt-out armature is the problem, you will have to rewind the armature.
What causes a burnt commutator?
Slot bar marking or burning In certain situations this is made worse, electrical overload, an incorrect neutral setting, contamination or an improper interpole strength can be factors. Resurfacing the commutator will be required if the trailing edges of the darker bars looks to be etched or burnt.
How do you remove copper wire from an armature?
1:405:33Removing copper from electric motors the easy way. - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou're going to see a little loop there a little clip and that's where your copper is looped onMoreYou're going to see a little loop there a little clip and that's where your copper is looped on before you goes around and wraps around the easiest way to do this is take your nippers.
How would you locate a shorted coil in an armature?
The first check to see if your armature windings are shorted is the “180° Resistance” test. A volt/ohm meter can be used to check the resistance of the series windings connected between the two commutator bars of each coil.
Joliet Electric Motors
ISO 9001:2008 certified armature repairing & rewinding services. Capabilities include form winding up to 690 V, core testing, motor winding up to 10,000 hp, sand, glass bead, cob & soda blasting & winding verification.
Koffler Electrical Mechanical Apparatus Repair, Inc
Repair and rewind services of electrical equipment, including armatures. Capabilities include rewinding from fractional to 30,000 HP, vacuum pressure impregnation, balancing, vibration analysis, laser alignment, troubleshooting, thermographic surveys, and testing services.
Brehob Corporation
Manufacturer & distributor of electrical equipment, air compressors, cranes, and hoists. Equipment includes AC/DC motors, controls, drives, compressors, dryers, heat transfer equipment, cranes and hoists of all sizes and types, ergonomic work stations, automation equipment, and more.
Electric Motor Center, Inc
Armature repairing & rewinding services for servo motors, centrifugal, sump, effluent & wastewater pumps, gearboxes, blowers & gear reducers. Capabilities include laser alignment, balancing & vibration & bearing analysis.
Delta Electric Motor Repair, Sales, and Service, Inc
Armature repairing & rewinding services. Repairing & rewinding services are available for motors, pumps, gear reducers & generators. Sales, field & 24 hour emergency services are also available.
Unico Mechanical Corp
Armature repairing & rewinding services.
Lange Electric Co. Inc
Armature repairing & rewinding services. Services include repair & rewinding motors to 1000 hp, rewinding for hermetic applications, temperature controlled burnouts, quality testing, mechanical repairs & rebuilding, dyamometer load testing, dynamic balancing to 7500 lbs.
