59 rear hydrolic wheel cylinder

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hjans
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59 rear hydrolic wheel cylinder

#1

Post by hjans » Sat May 08, 2010 9:21 am

Hi there
I have to replace the rear brake wheel cylinder on my 59 pan.
Now i see there are 2 types of wheel cylinder : the 58-62 type and the 63-72 type.
How can i recognize wich i have on my bike ?
I donnow if the original brake assy is installed, so ordering the 58-62 type probably is ok, but i want to be sure
Anyone can tell me the differences in the sizes/diameters or whatsoever ?

problem is the thread where the banjobolt (wheelcylinderbolt) is screwed in : former owner thought that silicone would do the job, but the tread is gone the first 1/4 inch

Hans



Sir_Rat
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Re: 59 rear hydrolic wheel cylinder

#2

Post by Sir_Rat » Sat May 08, 2010 9:59 am

'58-'62 brake shoes should be 1 5/16" wide......drum should be 1 7/8" deep and the backing plate should be 8 1/8" wide.

'63-'72 brake shoes should be 1 13/16" wide....drum should be 2 1/8" deep and the backing plate should be 8 5/8" wide.

This is straight from Palmer book I hope it helps you ID what u got. He doesn't get into the wheel cylinders themselves and it could be they are interchangeable...........Good Luck!

Aloha ...Mike

hjans
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Re: 59 rear hydrolic wheel cylinder

#3

Post by hjans » Sat May 08, 2010 1:02 pm

thank you Mike
very usefull

as we say over here : adieje wah !!

Hans

Bosheff
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Re: 59 rear hydrolic wheel cylinder

#4

Post by Bosheff » Sat May 08, 2010 4:01 pm

If I remember correctly, one wheel cylinder has the hole for the brake line bolt flat across the face of the wheel cylinder, while the other wheel cylinder has the hole at about 45 degrees across the face of the cylinder. Likewise, the brass fitting on the end of the rubber brake line will either be flat, or will have a 45 in it to mount flush with its corresponding wheel cylinder. As far as I know these wheel cylinders can be interchanged, so just because you have one type, this does not mean it's the correct piece as per the parts book for your application....bosheff

NightShift
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Re: 59 rear hydrolic wheel cylinder

#5

Post by NightShift » Sat May 08, 2010 5:09 pm

Dear Hans,
The slave cylinders cant be swapped without cutting up a shoe plate because the holes were different. Early shoe plates had a bell shaped reinforcement and late shoe plates had a house shaped reinforcement and said Bendix on them. Sidecars used the early plates with the little cylinder.

Hope this helps,

Motorcyclemike
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Re: 59 rear hydrolic wheel cylinder

#6

Post by Motorcyclemike » Mon May 10, 2010 10:15 pm

It's been about 5 years since i had to Replace the slave rear cylinder on the 58 panhead......i bought the one thats for the later years (62 to 64 i believe?) and it FIT OK in the holes.....BUT it had a Larger body for the bigger slave piston assembly.......i actually had to grind some metal off the inside so it would clear the brake hub.

Good Luck.
MCM

hjans
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Re: 59 rear hydrolic wheel cylinder

#7

Post by hjans » Tue May 11, 2010 6:13 pm

Mikes tips did the job
ordered new cylinder today
will take a week or so

Thanks you all

Hans

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