28 AA worm drive rear castle nut washer

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birdacre
Posts: 480
Joined: October 8th, 2013, 2:37 pm
Body Type: AA express
Model Year: 1928

28 AA worm drive rear castle nut washer

Post by birdacre »

does anyone know why the flat washer that goes on before REAR castle nut is so thick? it also had the hole in the middle offset? must be a reason. I am missing one and have a thick washer on one side. not anywhere near as thick as the original. maybe the big washer was to overcome sideway thrust? now i am worried the standard washer will not work. does anyone have an extra washer that i speak of ???
Bob C
Posts: 1442
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: 28 AA worm drive rear castle nut washer

Post by Bob C »

Is it the hex one you re asking about?

Bob
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birdacre
Posts: 480
Joined: October 8th, 2013, 2:37 pm
Body Type: AA express
Model Year: 1928

Re: 28 AA worm drive rear castle nut washer

Post by birdacre »

no, sorry, the big flat washer on the rear wheels. hope this helps. goes on right before castle nut and then the cotter pin. thank you in advance.kevin
Bob C
Posts: 1442
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: 28 AA worm drive rear castle nut washer

Post by Bob C »

I think the one for the axle for a 1928-29 is A-22421 29/32" (3/16"x1 7/8").

Bob
Stakebed
Posts: 1223
Joined: June 14th, 2007, 7:29 pm
Body Type: Grainbox
Model Year: 1929
Location: Illinois

Re: 28 AA worm drive rear castle nut washer

Post by Stakebed »

I might have one lemme look in the next few days...( I should have one...just gotta check them and get pics)
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tiredtruckrestorer
Posts: 338
Joined: April 20th, 2003, 7:09 pm
Model Year: 1931
Location: Orwigsburg, PA

Re: 28 AA worm drive rear castle nut washer

Post by tiredtruckrestorer »

The axle nut washer was a special hardened washer to withstand the side thrust placed on it. A standard washer could possibly dish out, leaving the wheel hub get loose on the axle and work on the axle key. I read somewhere that they recommend to retighten the axle nuts at 500 miles to keep the hubs tight on the axle to prevent wear and failure. Using the correct washers are cheaper than replacing an axle and hub. Some Model A suppliers sell the correct hardened washers.

Keith
birdacre
Posts: 480
Joined: October 8th, 2013, 2:37 pm
Body Type: AA express
Model Year: 1928

Re: 28 AA worm drive rear castle nut washer

Post by birdacre »

any idea why the hole is slightly offset?
birdacre
Posts: 480
Joined: October 8th, 2013, 2:37 pm
Body Type: AA express
Model Year: 1928

Re: 28 AA worm drive rear castle nut washer

Post by birdacre »

thank you for your help stakebed. i will wait to hear from you with info. Kevin
Stakebed
Posts: 1223
Joined: June 14th, 2007, 7:29 pm
Body Type: Grainbox
Model Year: 1929
Location: Illinois

Re: 28 AA worm drive rear castle nut washer

Post by Stakebed »

Found 2, one is usable, other is so-so (flat straight starting to pit...) do you still need one?

Dont remember where your located... I plan to go to IOLA if that helps.
birdacre
Posts: 480
Joined: October 8th, 2013, 2:37 pm
Body Type: AA express
Model Year: 1928

Re: 28 AA worm drive rear castle nut washer

Post by birdacre »

i am in ct. i would think that a little pitting would be ok? what would you want for it? at least cheap to ship to 06250 ct. hope all is well. kevin
birdacre
Posts: 480
Joined: October 8th, 2013, 2:37 pm
Body Type: AA express
Model Year: 1928

Re: 28 AA worm drive rear castle nut washer

Post by birdacre »

should have said, send me the usable one, just let me know what you would like for it. kevin
Stakebed
Posts: 1223
Joined: June 14th, 2007, 7:29 pm
Body Type: Grainbox
Model Year: 1929
Location: Illinois

Re: 28 AA worm drive rear castle nut washer

Post by Stakebed »

yea ill send you the better one. $5 shipped? I can send you a pic if I have your email address (PM it to me if you'd like)
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