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How to assemble an electeic motor/ getting the armature past the brushes

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The brushes are spring loaded (as you know), but if you look carefully, often there are small holes that a toothpick will fit into, in the track for the brush. Push each brush back far enough to put the toothpick into the hole, usually there is another hole on the other side, put the pick into that to hold the brush back. Repeat with the other brush, then install the armature. Once it is in place, remove both toothpicks.

Posted on Sep 05, 2010


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Heater motor will stop running and will start with a small tap on housing

The heater motor will most likely need replaced as the armature and/or brushes are wearing out and the "small tap" causes the brushes to make proper contact with the armature. Please rate this answer, thanks.

Feb 03, 2011 | 2000 Pontiac Sunfire

1 Answer

Tried to start my 2003 escalade this morning and it would only click. I replaced my battery and still nothing. after a couple of min. i tried agin and it started, this eve it is doing the same thing. just...

Yes - your problem is in your starter - specifically the armature and / or brushes. The starter is located on the passenger side of the vehicle, mounted to the front of the transmission and back of the motor. The starter's armature kicks out and connects with the Ring gear ( automatic trans) or flywheel ( manual trans) and turns the flywheel ? gear to engage the engine. The clicking indicates the solenoid is completing the circuit but the armature is not engaging the gear.The positive battery cable goes directly to the solenoid which is mounted to the starter and the positive cable MUST be removed prior to removing the starter. The armature and related brushes can be replaced instead of buying a new or rebuilt starter / solenoid assembly but should be done by a qualified professional as it can be done wrong and cause serious damage to the ring gear or flywheel.
Hope this helps and please rate my solution!!

Nov 26, 2010 | 2003 Cadillac Escalade

1 Answer

What fuse controls the 1999 Cadillac DeVille's heater fan? My heater fan doesn't work.

The fan assembly is under the glove compartment. Remove cover[3 scews] unplug electrical connector. then remove the 3 bolts that hold the fan assembly in the housing. take motor apart and clean check brushes in brush holder, then sand the armature where the brushes ride. Stretch spring on brushes , the put the motor back together. works 95% of the time.

Oct 15, 2010 | 1999 Cadillac DeVille

1 Answer

Won't start. not a battery problem. i think my motor is bad. how much does a motor usually cost?

You are looking at region of $150 and labour on top. I am putting a tip together on starters in general that I include herein. When you get your motor off it could be helpful and save you some money in the process:-

Dead...? Sticky solenoid due to corrosion or glued up lubricant and dirt ? dismantle and rub clean with some emery paper. Worn starter motor armature brushes ? strike motor body with end of a piece of timber whilst cranking; the jolt may encourage enough contact to get the starter motor running for long enough for ignition to occur. ? For a permanent fix dismantle the starter motor and replace the carbon brushes. Corrosion in the starter motor body between the steel jacket and aluminium gear casting.? insert self tapping screw between the two parts to bridge the corrosion? For a permanent fix remove motor and strip down and wire brush components back to the metal and then reassemble.

Click, click, click ...occasional start Worn contact plates in solenoid failing to provide high current to energize the starter motor windings? dismantle solenoid and replace copper contact plates and plunger ring (readily available as an inexpensive overhaul kit).

Wahr, wahr, warh...laboured motor Worn bronze bearings on the ends of the starter motor are allowing the armature to run off centre and grind against the surrounding field magnets on the inside of the motor body? dismantle motor and replace the bronze bearings (inexpensive fix). Over-drawing motor - high current is drawn but this is not translated into effective turning effort by the motor. The field magnet windings have begun to short out, probably as a result of age or through over use in constantly trying to start a poorly igniting engine ? replace/ exchange the starter motor as the field windings of the stator magnets on the motor body are fried and beyond repair. Wheeeeeeee start Although engaged fully with the flywheel a slipping pinion gear clutch means that the motor is ineffectual at turning the engine over ? remove the starter motor and replace the pinion gear on the end of the starter motor shaft

Lottery start...occasional no start

  • The motor occasionally refuses to turn first time and has a defined rhythmic pulse when turning over - this is due to either burnt out armature coil or the contact face of the armature has become badly pitted causing the brush to miss making contact.

? - replace/ exchange the starter motor as armature windings are beyond repair.

Sep 26, 2010 | 2000 Jeep Grand Cherokee

2 Answers

01 chevy duramax replaced starter 5 weeks ago every thing was fine now starter stays tryin to start after truck starts for about 30 seconds and then it stops please help what could it be

It sounds like a shim missing. The starter bendex is not releasing fast enough do to binding and the revilutions of the ring gear keeps it spinning until the sintrivical force drives it back. Hope this helps.

Aug 13, 2010 | 1990 Jaguar XJ6

1 Answer

Where is the starter located on the metro

Four types of starter motor are utilized depending upon the vehicle transaxle and assembly plant location. Manual transaxle equipped vehicles utilize a conventional starter motor which consists of a yoke, an armature assembly, an overrunning clutch assembly, a solenoid, a commutator end cover, a brush holder and a pinion drive lever. Automatic transaxle equipped vehicles utilize a reduction type starter motor which has, in addition to the components found on conventional starter motors, a reduction gear and shock absorber assembly.


Fig. 3: Starter motor assembly

  1. Disconnect the negative battery cable.
  2. Raise and support the vehicle safely.
  3. Label and disconnect the starter solenoid electrical connector.
  4. Remove the mounting bolts from the starter motor, then carefully lower the assembly from the vehicle.
To install:
  1. Install the starter motor assembly complete with any shims that may be used between the engine block and the starter.
  2. Install and tighten the starter mounting bolts to 17 ft. lbs.. (23 Nm).
  3. Connect the starter solenoid electrical connector.
  4. Lower the vehicle and connect the negative battery cable.

Hope helps.

Aug 01, 2010 | 1996 Geo Metro

1 Answer

How to change a starter

Starter - There are like 2 or 3 bolts on most starters that are long and go into the engine block. Then there is the electrical positive connection which should be removed only after the battery has been disconnected to avoid shock and fire caused by a short in the electrical system when disassembling or assembling (warning: this a safety measure designed to keep you from hurting yourself or the car). Assembly is the reverse of the removal.
TESTING No-Load Test Make the connections as shown in the illustration. Close the switch and compare the rpm, current and voltage readings with the specifications found in the chart located in this section. Fig. 1: Proper connections for the starter no-load test 87952035.gif
  • Current draw and no load speed within specifications indicates normal condition of the starter motor.
  • Low free speed and high current draw indicates worn bearings, a bent armature shaft, a shorted armature or grounded armature fields.
  • Failure to operate with high current draw indicates a direct ground in the terminal or fields, or frozen bearings.
  • Failure to operate with no current draw indicates an open field circuit, open armature coils, broken brush springs, worn brushes or other causes which would prevent good contact between the communtator and the brushes.
  • A low no load speed and low current draw indicates high internal resistance due to poor connections, defective leads or a dirty commutator.
  • High free speed and current draw usually indicate shorted fields or a shorted armature.
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Jul 21, 2010 | 1990 Chevrolet Cavalier

1 Answer

Mercedes heater blower motor e220 comes on and off when it likes and will not select speeds

Check that the fuse is not loose but I suspect that the carbon brushes on the motor have worn or more likely have become ineffective. You may also notice that the fan engages when you turn in one direction but disengages again when you turn in the other. The motor moves slightly on its bearings due to weight transfer and the armature touches the corresponding brushes. You will need to get the motor out to overhaul it and this often means removing the windscreen wiper motor assembly first. The kitchen table on plenty of newspaper is great place to over-haul electric motors; the paper is to keep the mess down and the wife happy. With the motor out strip out the brushes. If they look to have plenty of carbon on them (5mm+) check out the pressure springs that press them to the motor armature. Carbon black and oxide build up can often render the springs action useless causing the the brushes to become fixed in their galleries. Clean everything, armature facings and brush galleries, with an old tooth brush or some such (my wife's old mascara brush works a treat) and lubricate with a squirt of WD40. With everything clean and lubricated reassemble the motor and it should run like new and for a long time.

Feb 16, 2010 | 2001 Mercedes-Benz E-Class

1 Answer

Window motor replacement 95 APV Lumina

Personally, I would clean the grease off of the commutator and brushes and put a 3/4" drywall screw through the thermal switch. All of these things are inside the motor. there is no need to remove the motor or regulator. Instead, remove the end cap ( where it plugs in) and pull out the guts of the motor ( end cap, brushes, springs and armature). Note the rotational position of the armature where it comes out of the motor easily. After repair, preassemble the guts ( paying attention to the rotational position of the armature) and reinstall into the motor. This is a better fix than replacement every 2-3 years

Jul 12, 2008 | 1995 Chevrolet Lumina Apv

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