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10-01-2017, 05:00 PM
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#1 |
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Registered User
Join Date: Dec 2010
Location: konawa ok/oakdale Ca.
Posts: 1,652
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Do I need adjustment holes in my brake drums?
I just bought rear brake drums for my 66.They don't have the holes in them to make the adjustment.Do I need them since this system is self.adjustment?
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10-01-2017, 05:03 PM
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#2 |
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Moderator
  
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Do I need adjustment holes in my brake drums?
Take a look at your backing plates.
__________________
Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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10-01-2017, 05:55 PM
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#3 | |
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Registered User
Join Date: Dec 2010
Location: konawa ok/oakdale Ca.
Posts: 1,652
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Re: Do I need adjustment holes in my brake drums?
Quote:
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10-01-2017, 05:59 PM
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#4 |
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Moderator
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Do I need adjustment holes in my brake drums?
Yes. Thats where the hole is. It's oblong, on the bottom.
The drums go round and round on the outside, attached to the axle. The adjustment is made from the backing plate side, sometimes there will be a rubber plug installed if your lucky. Check this vid out at about the 3:30 mark - https://www.bing.com/videos/search?q...37&FORM=VRDGAR
__________________
Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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10-01-2017, 07:41 PM
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#5 |
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Registered User
Join Date: Dec 2010
Location: konawa ok/oakdale Ca.
Posts: 1,652
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Re: Do I need adjustment holes in my brake drums?
No holes there either.I thought about drilling a few holes in the new but I don't if the new drums are balanced.
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10-01-2017, 08:14 PM
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#6 |
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Moderator
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Do I need adjustment holes in my brake drums?
Re View the video please. Do Not Drill the Drums!
The adjustments are made as the video shows, Not through the drums. Your on the internet - Post some pictures for us please.
__________________
Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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10-01-2017, 10:40 PM
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#7 | |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
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Re: Do I need adjustment holes in my brake drums?
Quote:
You need to adjust the shoes when first installed and then let the self adjusters fine tune them. You also need the plug/hole to maybe back off the brake pads if you need to remove the drums sometime in the future. |
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10-01-2017, 11:58 PM
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#8 | |
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Registered User
Join Date: Aug 2006
Location: Athens, Georgia
Posts: 1,458
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Re: Do I need adjustment holes in my brake drums?
Quote:
 
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'61 Suburban daily driver: off the road due to 180-pound 8-pt buck! '62 K-10 long-step project '61 C30 Camper, aka "Valdez" There's no cool like Old School |
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10-02-2017, 01:01 AM
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#9 | |
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Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
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Re: Do I need adjustment holes in my brake drums?
Quote:
See Hole in Backing Plate: https://www.google.com/search?q=rear...=1506920130931 |
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10-03-2017, 08:34 PM
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#10 |
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Registered User
Join Date: Jan 2013
Location: Imperial, MO
Posts: 1,003
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Re: Do I need adjustment holes in my brake drums?
As shown in the link luvbowties posted above, the replacement JB5 Raybestos drums I purchased featured knockouts. The JB5 backing plates sourced from a later 12-bolt did not. Adjusting through the drums works just fine.
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10-08-2017, 03:59 PM
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#11 |
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Registered User
Join Date: Dec 2010
Location: konawa ok/oakdale Ca.
Posts: 1,652
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Re: Do I need adjustment holes in my brake drums?
Thanks for all of the response.Looks like I will be putting a hole on that plate
Instead of the drums.Thanks you guys |
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