Pictures of how I Disassembled Cleaned and Rebuilt the starter motor in my 1994 Nissan Pathfinder.
Here's where the starter came out of. You can see the red cover ripped off the oil sensor,
and the oil filter relocation adaptor. Where the hell did all this oil come from?
Valve covers? Transmission front shaft seal? Oil Sensor? Relocation adapter? D. All of the above.
Here is a view of the flywheel inside the transmission bellhousing.
Starter is covered in oil and road grime.
Degreased the whole thing.
There is the side that turns the flywheel. The bearing cover is not easy to clean.
This is the Hitachi Starter Motor and Solenoid all cleaned up.
Getting this small wire off of the bracket was a huge chore.
I could only see these two tiny clips after I got it off.
Removed 2 bolts and split the starter case.
Removed 2 bolts and split the solenoid case.
The entire starter motor came apart here to reveal the gears.
I am not sure the "stirrup / spur" shaped piece is located correctly.
It engages the output shaft to the flywheel.
When I disassembled the starter, it looked like it came out of the area marked A.
But it looks like it was meant to fit into B, so I reassembled it into B.
Update: B worked.
I cleaned all the parts. Here's the gear box half of the starter, cleaned and laid out,
ready for reassembly. I didn't take the motor apart the first time around.
I said a prayer to Jobu and sprayed in some WD-40.
Update: That didn't help. The starter failed about 3 months later.
WD40 is God, so it must be the curse of Jobu.
I later rebuilt the electric motor.
I used a flat screwdriver to pry the two halves apart. These are the alignment marks that I used to align the halves later for reassembly.
The electric motor disassembled.
Left to right: Armature or Rotor, Body or Case with permanent magnets inside, Brush assembly and Brushes.
The brushes and the brush holder assembly are
full of brush dust and some sort of mysterious oily substance. Hmmmm.....
The Armature contacts (on the right) are full of dirt. Cleaned it out with flat screwdriver.
All the resin on the windings is fine.
The Armature contacts are also gouged and uneven.
Spun it around on some 220 grit sand paper.
Not enough to remove all gouges, just enough to satisfy my curiosity
of what would happen if I sanded this.
I removed and cleaned the brush holder.
You can see the positive brushes are very worn.
My internet surfing tells me this is the problem.
- Read what seems to be a good tutorial on soldering.
Tinned the new brush wire:
Then this happened:
Bent soldering gun tip trying to solder brush into electric motor.
Then this happened:
Hired a professional to solder brush into electric motor. His big gun was broken so he had to use his little one. He said there is no way my soldering gun could do this job. I enjoyed talking to a cool guy about tools and poking about in his old workshop.
The new brushes properly soldered into the starter motor brush assembly.
Ebay Brushes $18 + shipping.
Pro Soldering $15.
Starter Reassembly -
I put the little washers / spacers onto this separator plate, and put it onto the motor.
I greased the hell outa these gears and put the gearbox and output shaft back on.
Next I put the bearing back into the case, put the stirrup shaped piece in,
put the case back together loosely, and screwed the bearing cover back into place.
I put the solenoid back together.
I put the wire thing in this way so it would act as a fulcrum to the stirrup piece.
And there is the starter all cleaned up and ready for reinstallation.
Then I replaced the oil pressure switch because it may have a leak
and it is way easier with the starter out of the way.
I put some teflon tape around the threads.
I now realize the threads need to contact the block to ground the switch, so maybe that is a bad idea.
But the light works, so I must have tightened it enough
for the threads to cut through some areas of the teflon and complete the circuit.
I did not drain the oil.
About 1cc of oil leaked out in the time it took me to switch the switch.
- Then I finished my beer.
Leo "SugarNutz" Thomas wrote ( 5/2/2011 2:48:53 PM )
Garage wrote ( 5/3/2011 5:23:32 PM )
SugarNutz wrote ( 5/13/2011 7:14:49 AM )
Garage wrote ( 5/13/2011 8:19:36 PM )
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