starter Motor Problems

[Alex Blair (RIP)]

Originally posted by Bryan
All,

I have striped my starter motor today to try and get to the bottom of this problem.

It would appear there is some play in the bushes but how much can you get away with or does there need to be no movment at all?

I have attached some pics of the the end plates.

I have noticed that there is a lot of scoring on the end plate with the brushes. it looks like the armeture has been rubbing.

Looking at the starter motor parts diagram in my CMP manual it shows a thrust washer part number. 11036 I know my starter is a diffrent typ but should this washer be fitted?

Bryan

Hi Bryan
There should be NO play in those bushings..and the thrust washer should be in the brush end,sometimes both ends..
When the starter engages,it trys to push the armature sidways and backwards ,toward the brush end.
The clearance between the stator and armature is CRITICAL....
Even rust on either will ground it out...and the starter will not turn...Put in some new bushings,clean the stator and armature with some fine sand cloth, and if you have a lathe,do "Dressing cut" on the segmentated part of the armature on which the brushes ride...install new brushes..ensure that you undercut,or clean well between the segmants (Thoses are insulators between the segmants)so that no metal filings are shorting out the segmants...
Reassemble...When you are cleaning up the starter,make sure that you don't wash the new Bushings with degreaser or solvent...Those bushings are oil impregnated bronze..wash them and you'll wash the lubricant out of the bushings,and you'll be doing it all over again...
Check rotation and end play on the bench...Reinstall...Reach for key and it will start when your hand is within 6" of the key..It will be that fixed....!!!