Noisy alternator 2

Hi do anyone no where i can get the bearings for a Mk1  alternator . the alternator is fine just bearings are noisy  . much be able to get them so where ? shame just to buy a new alternator just for sake of fitting new  bearings

The society we live in is 'exchange or scrap only' . You could take one apart and have the bearings [there are 2] matched for replacement by a bearing specialist , but that would cost about the same as , hand over your wad for a new one .

Cheers .

will take it apart and see if there is a bearing number on them , i hate to be beaten . :?

If there's no number on the bearing you should be able to take a few measurements:

Outside Diameter (overall diameter)
Inside diameter (the inner diameter that fits on the shaft)
Width

Type i.e. roller, ball, thrust etc etc

Let us know how you get on.


Tim.

i have found the size of the bearing on a site they are as follows
Rear-small: 6203 RS or 6203 2RS (rubber seal) 17mm ID x 40mm OD x 12mm W
Front-large: 6201 RS or 6201 2RS (rubber seal) 17mm ID x 47mm OD x 14mm W

std sizes, your local bearing trader should have them in stock or be able to get them within a couple of days.

Are you going to do a 'how to guide' or this??

Just ran alternator up on the lathe with load on the bearings and no noise at all thinks its the water pump , just gong back to take it off let you all no

thoyland said

If there's no number on the bearing you should be able to take a few measurements:

Outside Diameter (overall diameter)
Inside diameter (the inner diameter that fits on the shaft)
Width

Type i.e. roller, ball, thrust etc etc

Let us know how you get on.


Tim.

 GOOD SITE
http://www.rangerovers…trical/boschaltrepair.htm

alternators are normally a return product. i.e you get money back for taking in your old one.

It was not water pump.  put alternator  back on same noise stripped down  alternator very dry front bearing have taken bearings off and  have sent for bearings .Total cost of bearings ? 12 let you no .
novocaine why pay for a exchange alternator at about ?95 when you can do it your self for about ? 12 ? bearings cheaper if you sent away for them on Ebay

graygray put some pics up of how you sort the problem out so we can learn a bit.
If possible cheers.

fair point in this case. just saying.
my alternator broke a coil so new was only option.
i will get the old one rewound at some point so i have a spare.

1.   Remove alternator from car see manual.
2.   Mark both front and rear casing so goes back in the same place        photo 1.
3.   Back of alternator remove the two screws on regulator photo 1A.
4.    Lift of regulator photo 1B.
5.   Undo front pulley nut and take off pulley watch what order it all  comes off in photo 2.
6.   Take out half moon key way with screw driver photo 3.
7.   Undo the four cross head screws that hold the alternator together use some WD 40 on then photo 4.
8.   Get puller and pull the front casing off photo 5.
9.   Turn the front casing over and undo the front bearing cover photo 6.
10.   No tap out the front bearing form its housing photo 7.
11.    Old bearing and front cover photo 8.
12.   Fit new bearing into front cover with socket to drive in refit bearing cover photo 9.
13.    Re fit front cover over alt shaft and gently tap home photo 9.
14.   Pull rear bearing off with puller you can do this at an earlier stage when you have split the casing and got the rotor out I forgot photo 10.
15.   Tap new rear bearing on with socket over it tap fully home photo 11.
16.    You will see the rear bearing sits in a plastic cup make shore you refit this in the rear casing photo 12.
17.    Re fit rotor with front casing back into the rear casing make sure you reline the marks you put on the front and rear casing as in photo 1.
18.   Put the four screws  back in the casing that you took out in photo 4 and do up even
19.    Refit cooling fan and spaces in the order you took then off.
20.   Refit pulley and nut.
21.   Refit regulator.
                          CLEAN ALL PARTS BEFORE REFFITING
                                             New parts bearings
                                                    6201-2RS
H
                                                    6203-2RS
H
HOPE THIS MY HELP SOME OF YOU WHO WOULD LIKE TO HAVE A GO AT FITTING YOUR OWN BEARINGS, THIS IS ONLY MY OWN GUIDE IF YOU USE IT. ITS AT YOUR OWN RISK,

If you've got a noisy alternator before spending lots of money try spraying a little WD40 onto the belt while its running, it won't slip. Spray it in the gap where the belt meets the pulleys. It wears off after a bit but at least you know your alternator is OK.

I'm going to be doing this with a spare I just picked up..

I found this which might be useful to people in future, though annoyingly, none of the images work anymore…

http://www.clubgti.com…um/showthread.php?t=82529

Mat