Where is the Rear Brake Adjustment Window 69 C20 ?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

weim55 · 11-02-2019, 09:08 PM

Went to remove the hub-brake drum assembly on my '69 C20 coil spring HO52. Going to have to backoff the brake adjustment to get the assembly removed. There is no brake adjustment window anywhere, none on the backing plate, none on the brake drum. No knockout plugs anywhere either. Wondering if the brake drums are replacements and the originals had the windows?? Would one of you possibly have an image of an original and the window location?? I'll just cut a window if I know the location........

Steve weim55 Colorado

**Stocker** · 11-02-2019, 11:03 PM

My '72 K20 was the same. We had to fight to get the shoes off, then drill holes in the backing plates for future access to the adjusters. The holes have rubber plugs in them now.

**FirstOwner69** · 11-03-2019, 12:21 AM

Here's a picture of mine, also a '69 C20 coil spring H052. I don't recall ever replacing the drums, but to be sure I'd need to check the receipt file. The truck has 119,XXX miles and most miles were highway.

Hope this helps.

Jim

weim55 · 11-03-2019, 12:29 AM

Quote:

Originally Posted by FirstOwner69

Here's a picture of mine, also a '69 C20 coil spring H052. I don't recall ever replacing the drums, but to be sure I'd need to check the receipt file. The truck has 119,XXX miles and most miles were highway.

Hope this helps.

Jim

That's perfect, thank you! Wondering if the knockouts are there and I just can't see 'em with my old eyes (laughs...) I'll take a close look tomorrow and if there are no knock outs I'll just cut a couple adjustment windows to duplicate yours.

Steve weim55 Colorado

**FirstOwner69** · 11-03-2019, 12:46 AM

Quote:

Originally Posted by weim55

That's perfect, thank you! Wondering if the knockouts are there and I just can't see 'em with my old eyes (laughs...) I'll take a close look tomorrow and if there are no knock outs I'll just cut a couple adjustment windows to duplicate yours.

Steve weim55 Colorado

Glad I could help.

Jim

**Stocker** · 11-03-2019, 01:07 AM

Good luck with it Steve, I hope you find some knockouts. Mine absolutely did not have them.

RustyPile · 11-03-2019, 08:13 PM

Quote:

Originally Posted by weim55

Went to remove the hub-brake drum assembly on my '69 C20 coil spring HO52. Going to have to backoff the brake adjustment to get the assembly removed. There is no brake adjustment window anywhere, none on the backing plate, none on the brake drum. No knockout plugs anywhere either. Wondering if the brake drums are replacements and the originals had the windows?? Would one of you possibly have an image of an original and the window location?? I'll just cut a window if I know the location........

Steve weim55 Colorado

I can't really tell, could be just a "pattern" in the dirt.. Is that a knock out plug at about the 9:00 position??

weim55 · 11-04-2019, 12:51 AM

Quote:

Originally Posted by RustyPile

I can't really tell, could be just a "pattern" in the dirt.. Is that a knock out plug at about the 9:00 position??

Sure enough, you are correct! Used a wire brush and finally found it! Thanks for the help guys!

Steve weim55 Colorado

jaros44sr · 11-04-2019, 07:45 AM

don't expect that plug to come out easy mine gave up quite a fight, mine was really in there

**LockDoc** · 11-04-2019, 10:36 AM

-
It isn't really a plug because it isn't cut all the way through. They just mark the location.

LockDoc

weim55 · 11-04-2019, 12:04 PM

Quote:

Originally Posted by jaros44sr

don't expect that plug to come out easy mine gave up quite a fight, mine was really in there

You were correct, those plugs would positively not come out! Had do use a torch on both of them to get them out, only to find both drums were junk. Now I’m finding how difficult it is to find rear drums for a 69 HO52

........

Steve weim55 Colorado

jaros44sr · 11-05-2019, 07:37 AM

Quote:

Originally Posted by weim55

You were correct, those plugs would positively not come out! Had do use a torch on both of them to get them out, only to find both drums were junk. Now I’m finding how difficult it is to find rear drums for a 69 HO52

........

Steve weim55 Colorado

I bought mine (1/2 ton from rock auto), returned 3 sets b/c they were cracked, b/f I got a good set

Chevys4life · 11-04-2019, 11:01 PM

Steve............try this place in California for your rear drums and brake components. Go to www.inlinetube.com and take a look.

11-02-2019, 09:08 PM	#1
weim55 Registered User Join Date: Jan 2017 Location: Larkspur, Colorado Posts: 915	Where is the Rear Brake Adjustment Window 69 C20 ?? Went to remove the hub-brake drum assembly on my '69 C20 coil spring HO52. Going to have to backoff the brake adjustment to get the assembly removed. There is no brake adjustment window anywhere, none on the backing plate, none on the brake drum. No knockout plugs anywhere either. Wondering if the brake drums are replacements and the originals had the windows?? Would one of you possibly have an image of an original and the window location?? I'll just cut a window if I know the location........ Steve weim55 Colorado Attached Images

11-02-2019, 11:03 PM	#2
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,572	Re: Where is the Rear Brake Adjustment Window 69 C20 ?? My '72 K20 was the same. We had to fight to get the shoes off, then drill holes in the backing plates for future access to the adjusters. The holes have rubber plugs in them now. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

11-03-2019, 12:21 AM	#3
FirstOwner69 Senior Member Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,841	Re: Where is the Rear Brake Adjustment Window 69 C20 ?? Here's a picture of mine, also a '69 C20 coil spring H052. I don't recall ever replacing the drums, but to be sure I'd need to check the receipt file. The truck has 119,XXX miles and most miles were highway. Hope this helps. Jim Attached Images

11-03-2019, 01:07 AM	#6
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,572	Re: Where is the Rear Brake Adjustment Window 69 C20 ?? Good luck with it Steve, I hope you find some knockouts. Mine absolutely did not have them. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

11-04-2019, 07:45 AM	#9
jaros44sr Registered User Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,452	Re: Where is the Rear Brake Adjustment Window 69 C20 ?? don't expect that plug to come out easy mine gave up quite a fight, mine was really in there __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

11-04-2019, 10:36 AM	#10
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,388	Re: Where is the Rear Brake Adjustment Window 69 C20 ?? - It isn't really a plug because it isn't cut all the way through. They just mark the location. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

11-04-2019, 11:01 PM	#13
Chevys4life Registered User Join Date: Jun 2018 Location: Washington, DC Posts: 653	Re: Where is the Rear Brake Adjustment Window 69 C20 ?? Steve............try this place in California for your rear drums and brake components. Go to www.inlinetube.com and take a look.



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