hi can anyone help with some brake drum specs

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lost kiwi
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hi can anyone help with some brake drum specs

#1

Post by lost kiwi » Sun Feb 21, 2010 6:21 am

Hi

I have just moved back to New Zealand taking my 45 and my pan with me. I have some paperwork to fill out for the powers who be.



They need to know with regard to the brake drums and linings

1. OE Spec max drum diameter (wear not how far the drum can be turned out) and actual measurement

2. OE Spec minimum brale lining thickness and the actual measurement

3. Max runout /ovality and the actual measurement



I can then put in some "actual measurements" which hopefully will fall nicely within the requirements.

The bikes are wla and 57 panhead

Thanks if anyone can help



Cotten
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Re: hi can anyone help with some brake drum specs

#2

Post by Cotten » Sun Feb 21, 2010 2:25 pm

Lost!

Sorry I have no specs handy,
But I can warn you not to turn a drum until after you have secured some oversize linings.

Beware also that the center of the lug bolt pattern, as it will mount to a hub, is not always the same as the hole through the middle.

....Cotten

panhead_kicker
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Re: hi can anyone help with some brake drum specs

#3

Post by panhead_kicker » Sun Feb 21, 2010 5:04 pm

wow. You know, you MIGHT be able to see the need for this if you were importing a used 2001 vehicle for a daily driver, but really, aren't there any loopholes for antiques, historic vehicles etc?

Cotten
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Re: hi can anyone help with some brake drum specs

#4

Post by Cotten » Sun Feb 21, 2010 6:23 pm

Its all in the name of safety and protecting ourselves from ourselves.
It gets worse when vehicles can be impounded if repairs are not performed.

...Cotten

mbskeam
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Re: hi can anyone help with some brake drum specs

#5

Post by mbskeam » Sun Feb 21, 2010 7:31 pm

Last edited by mbskeam on Sun Feb 21, 2010 7:41 pm, edited 1 time in total.

Panacea
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Re: hi can anyone help with some brake drum specs

#6

Post by Panacea » Sun Feb 21, 2010 7:38 pm

As I recall the max diameter is stamped inside the drum, Kind of inconvenient, I'm not sure but just over eight inches rings a bell...Mike

NightShift
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Re: hi can anyone help with some brake drum specs

#7

Post by NightShift » Sun Feb 21, 2010 9:48 pm

Dear Lost Kiwi,
No specs in my original 1952 WL book either. They dont get much more modern. If there were such a thing the front and back would be different would I think.

Sorry,

fatfatboy
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Re: hi can anyone help with some brake drum specs

#8

Post by fatfatboy » Mon Feb 22, 2010 4:16 am

Note to self; Do not move to the New Zealand.

panhead_kicker
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Re: hi can anyone help with some brake drum specs

#9

Post by panhead_kicker » Mon Feb 22, 2010 4:36 am

Well now, make a number up that suits your needs! If these guys can't dig up any real documentation for these numbers, then who's to say you're wrong? I doubt a bureaucrat! <grin>
Yeah that doesn't help, I know.

ozwick86
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Re: hi can anyone help with some brake drum specs

#10

Post by ozwick86 » Mon Feb 22, 2010 5:19 pm

lost kiwi,

Checking the manual, the Maximum allowable ID = 8.040 in. or 20.4 cm.

If the drum needs to be turned it can be as long as it is within the finished dimension = 8.100 in. or 20.57 cm. NOTE, use 0.030 in. or 0.76 mm oversize brake linings on brake drums turned to an I.D. of 8.060 in. 20.47 cm minimun to 8.100 in 20.57 cm maximum.

mbskeam
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Re: hi can anyone help with some brake drum specs

#11

Post by mbskeam » Mon Feb 22, 2010 9:38 pm

what manual?
I'm to lazy to look...LOL

ozwick86
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Re: hi can anyone help with some brake drum specs

#12

Post by ozwick86 » Tue Feb 23, 2010 3:01 am

This information came from the Clymer's Manual; Panheads 1948-1965, Chapter 13 page 443.

ozwick86
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Re: hi can anyone help with some brake drum specs

#13

Post by ozwick86 » Tue Feb 23, 2010 3:19 am

The specs are also in the AMF Harley Service Manual Electraglide 1959 - 1969 Section 2G 2G-3.

FlatHeadSix
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Re: hi can anyone help with some brake drum specs

#14

Post by FlatHeadSix » Tue Feb 23, 2010 6:01 am

panhead_kicker wrote:Well now, make a number up that suits your needs! If these guys can't dig up any real documentation for these numbers, then who's to say you're wrong?
After reading the original post it sounded like he was also going to make a number up for the "actual measurements". Which tells us that the authorities in NZ are not going to do a technical inspection, tear the bike apart and put the micrometer to it.

Its a paperwork thing, put some ballpark numbers down that sound believable, sign your name to it, and drive on.

mike

lost kiwi
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Re: hi can anyone help with some brake drum specs

#15

Post by lost kiwi » Fri Feb 26, 2010 10:10 pm

hi
Thanks very much for all those who helped here. HA i had a Clymer manual but didnt even think to look.
Basically it was all just a bit of bureaucracy gone mad. The tester had given me the brake paperwork to fill in because "I dont get involved in all that crap mate"

It only took 4 hrs from bike in to the inspection centre to riding off with NZ plates all good.

Thanks again for the help , its the 45 next week but now i know exactly what to expect
Cheers
Roger

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