Author Topic: Rear Brake Shoes help  (Read 1120 times)

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Offline Kouros

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Rear Brake Shoes help
« on: May 31, 2010, 12:25:57 PM »
I'm installing a set or rear brake shoes in my drum.

The shoes have holes that'll fit the nipples on the inner brake cover, followed by a plate and pins.
One of my brake shoes does not fit. Is there a difference between the upper and lower shoe? Should I help it by force? Its greased already but it seems the id and od don't match on one shoe. :-\

Am I missing something? Thanks
1974 CB750 K4 (Re-build in-progress)

Offline madmtnmotors

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Re: Rear Brake Shoes help
« Reply #1 on: May 31, 2010, 12:30:26 PM »
Any corrosion on the backing plate pin? Maybe a little steel wool or emery cloth on the pin and in the hole in the shoe? Put a verner caliper on each (the pin on the plate and the hole in the shoe) and report the difference. Are they Honda parts or aftermarket?
TAMTF...


Wilbur



Projects:
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Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                          
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
                                    http://forums.sohc4.net/index.php/topic,48858.msg515204.html#msg515204
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
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Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Late model K7/K8/F2/F3 front sprocket cover removal: http://forums.sohc4.net/index.php/topic,178428.msg2072279.html#msg2072279
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Offline Kouros

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Re: Rear Brake Shoes help
« Reply #2 on: May 31, 2010, 12:43:42 PM »
Here is picture.
Its the OD of the nipples that are diff!
All Honda Parts from Motogrid.com
Will check the measurements.

EDIT/Added
I just pulled my old shoes from the trash and tried to refit them, Its the same! The one oh the right is very tight. It'll go in if I force it with a hammer.


« Last Edit: May 31, 2010, 12:51:59 PM by Kouros »
1974 CB750 K4 (Re-build in-progress)

Offline Kouros

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Re: Rear Brake Shoes help
« Reply #3 on: May 31, 2010, 04:09:57 PM »
Anyone? Thoughts? Bump myself? ???
1974 CB750 K4 (Re-build in-progress)

Offline madmtnmotors

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Re: Rear Brake Shoes help
« Reply #4 on: May 31, 2010, 04:46:03 PM »
Don't reccommend pounding them on, the shoes need to pivot on this pin. Wipe the grease off and take some fine steel wool or fine emery cloth to the stubborn pivot pin. Shouldn't take much, the fit is close so any corrosion would likely be the culprit.

Corrosion is common here due to dissimilar metals, aluminum on steel.
« Last Edit: May 31, 2010, 04:47:54 PM by madmtnmotors »
TAMTF...


Wilbur



Projects:
"Evolution": http://forums.sohc4.net/index.php?topic=100352.0
"P.O. Debacle": http://forums.sohc4.net/index.php/topic,126692.msg1441661.html#msg1441661
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                          
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
                                    http://forums.sohc4.net/index.php/topic,48858.msg515204.html#msg515204
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Late model K7/K8/F2/F3 front sprocket cover removal: http://forums.sohc4.net/index.php/topic,178428.msg2072279.html#msg2072279
630 to 530 conversion: http://forums.sohc4.net/index.php/topic,180710.msg2094423.html#msg2094423

Sent from my Tandy TRS-80!

Offline Kouros

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Re: Rear Brake Shoes help
« Reply #5 on: May 31, 2010, 04:53:49 PM »
I'll clean it further. There is no corrosion there and that grease is new. I will try the steel wool too. again. the old shoes fit the same, one fits tight and the other just drops in.
1974 CB750 K4 (Re-build in-progress)

akershsa

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Re: Rear Brake Shoes help
« Reply #6 on: May 31, 2010, 05:04:36 PM »
My trick is to work on the shoe ,it'softer than the pin,roll up some fine emery stick in hole and carefully rotate to size

Offline Kouros

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Re: Rear Brake Shoes help
« Reply #7 on: May 31, 2010, 05:22:46 PM »
Well....I pounded it in being the impatient me. Once it got passed the top, it went in easier and pivots right. I lubbed it too. All is well. Thanks gents.

-K
« Last Edit: May 31, 2010, 11:02:54 PM by Kouros »
1974 CB750 K4 (Re-build in-progress)