924Board.org

[billmay34]

<<reposted to the General Discussion area>>
New Years greetings to all!

The Purple Martini has a wheel howl! We are submitting our information here in hopes of sage advise.

Symptoms: Wheel noise when rolling that quiets down upon steering changes.

Response so far: purchase new bearings and attempt removal are install of new bearings.

Problem: now that the wheel and brakes and transaxle are disassembled we are having a heck of a time getting the splined axle out of the original mounting. All of this makes us consider if perhaps the original howling was the result of a poorly adjusted/tightened crown nut on the axle in the first place. The general area is coated with a fine dust of a rust coloration that might indicate that lubrication and proper tightening of the crown nut was the main problem.

Is there an easy way to remove the splined wheel post? As long as we are in there we will renew the bearings and then reassemble with appropriate amounts of lubrication.

If anyone here has any words of wisdom (or pity) we hope you will share your advise and expertise.

Pictures at: http://s144.photobucket.com/albums/r177/billmay34/wheel/
_________________
Bill May
Seattle, WA
1991 MB 300E - 202,000 Miles
1977 Porsche 924 Martini - 85,000 Miles, Purple.

[tj924]

Try reposting in the "General Discussion" list. You'll get far better response there.

To answer your question, the splined wheel post should just slide out of the hub. Mine came out with a bit of jiggling. You may need to use some penetrating oil & a BFH (big f&%^ing hammer) to get it out if it's really wedged in there.
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TJ
Silver '82 924 NA 5-Speed Manual

[Allan]

Ok now I am a bit stuck. Had the same problem- howling from the back. Bought new bearings and when I changed them, found that the old ones were in excelent shape. So the only logical explanation was crown nut on the axle what really was loos. Now I cant tighten the damn thing - the brake lining is jammed edgeways on to the brake drum.
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Porsche 924-79-2,2L

[billmay34]

when you state the "the brake lining is jammed edgeways on to the brake drum" are you saying that the brake caliper is somehow rotated in the drum?

i don't think there is room for this to happen. rather it sounds like the brake drum is on the spindle slighly crooked. you may need to tap the drum off the axle spindle and inspect for drum damage.

in our case the bearing locked up an the drum continued to spin, which in turn runied the splines in the drum. we had to replace the drum altogether. good news was that the part was pretty cheap (importec.com) and the R&R was simple.

if you have a better/different description or a photo i would be happy to discuss/chat on this with you.
_________________
Bill May
Seattle, WA
1991 MB 300E - 202,000 Miles
1977 Porsche 924 Martini - 85,000 Miles, Purple.

[Allan]

Sry for the bad english The drum is not crooked, but when I tighten the crown nut the calipers edge goes against the drum inner side and blocks the wheel. The drum´s inner side and calipers should not have any contact at all! It just seems like there are too wide calipers inside.

EDIT: have taken off the drum and even modified it a bit, but no solution.
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Porsche 924-79-2,2L

[billmay34]

the fit for the drum over the brake pads can seem pretty tight. Perhaps you need to adjust the star wheel so that the barke shoes are closer in towards the spindle.

We are disucssing the rear brake drums not the brake calipers/disc system correct?

in our brake drum process we did have to adjust the star wheel to allow the brake shoes to come in a bit to allow the mounting of the drum. once the drum is in place and the crown nut is secured and pinned then you will be able to adjust the star wheel to send the shoes to the inner drum surface to the point of stopping rotation and then back off the star wheel a couple of points so the whell will spin without friction.

hope this helps.
_________________
Bill May
Seattle, WA
1991 MB 300E - 202,000 Miles
1977 Porsche 924 Martini - 85,000 Miles, Purple.

[Allan]