starter pinion bush

[tonyandjulie]

Can anyone tell me how a wonky starter pinion bush could be cause the starter not to work ?.
I now have a pinion bush ( thanks Brickwerks ) to fit and staring at the little bit of copper tubing I now have am puzzled as to how it could be the cause. Hopefully some knowledgable soul out there can explain it to me...

[dazzzer1]

the bush acts as the bearing at the business end of the starter, as i understand it, if its worn the ...the (i think its called the armature)for our purpose its the bit that spins round with all the coils on it), touches the outer body of the motor, causing it to be rubbish at starting your van.

the bush holds it in the center and makes it great at van starting.

be sure to soak it in oil first as it isnt a copper tube but phosfor and it is pourous, another way is to stand it on your thumb, fill it with oil and then squeeze the other end, this forces the oil to ooze out of the sides

the old one will break out if you are struggling they are brittle

[Aidan]

this bush is the support for one end of the starter motor's axle the other end is in a simple bearing and the rotor with the windings on runs close proximity to the magnets in the case, if the bush breaks up the rotor windings can start to rub against the magnet stripping the insulation on the windings and causing a short as well as physically stopping the rotor from rotating freely.
It may not be the cause of your problem, ime most starter issues are down to worn solenoid cap contacts; every time the solenoid bridges the contacts a very high amp current is passed across and the arcing as contact made and broken leads to erosion of the contacts and it gets progressively harder to pass the necessary current
normal symptons are first hesitancy, then sluggishness, then intermittent action,then fail that is fixed with a blow (with wooden handle end of hammer),followed by total failure; if having a starter refurbished always insist that a new cap is fitted and that the cap is the correct one with the long pin. Unfortunately on our starter the solenoid inner parts and cap are held in place by crimped edge and without the correct tools removing these and refitting them is not easy so many cheap refurbishers don't bother and complete new solenoids are expensive, and the chinese solenoids that are cheaper may not be made to same quality as the original bosch ones; I think you will find that the big firms who do refurbs in the uk will just fit a new complete chinese solenoid unit as that for them is the most cost effective route along with low paid polish labour
Lucas Germany used to supply a lot of refurbished units but they don't exist anymore

[tonyandjulie]

I am enlightened, many many thanks , Tony

[tonyandjulie]

just one thing...where does the bush actually go...is it in the starter itself ?. I have a brand new starter motor you and someone said, if you change the motor you must change the bush...just not sure where it lives and Haynes make no reference to it at all.

[edoh]

may be of use -

https://club8090.co.uk/wiki/Pe ... sh_removal

edoh