Oversized Rear Wheel Cylinder - The 1947 - Present Chevrolet & GMC Truck Message Board Network

frankdatank01 · 07-18-2010, 11:53 PM

In the process of changing my 6-lug to 5-lug, I recently ordered the rear brake drum rebuild kit from ECE. I received two wheel cylinders, one good one and one bad one. Both Raybestos, both made in China. Both center sections are sized right and the bolt pattern distance is the same but it looks like they have two castings for the case. The larger one also does not fit between the "ears" on the backing plate as well. The rubber boots are really squeezed in there.

I figured I'd post a pic to show the difference. (I've contacted ECE to get the right one).

I also posted a before and after. From one side anyway...

Frank

You'll see the one on the left is slightly smaller and has less material

Before rear drum rebuild (but after axles removed)

After rebuild with new Moser 5-lug axles (was going to redrill the original axles but they both had alot of pitting on the outer bearing surface so new axles for me!)

dwcsr · 07-19-2010, 12:07 AM

You have your new shoes on backwards. If you you replaced the axles due to pitting in the bearing surface you need to replace the bearings or you will trash your new axles

cdowns · 07-19-2010, 07:04 AM

yep shoes r wrong

Sammy · 07-19-2010, 07:41 AM

Nice looking axles. Another possible choice is to purchase axle bearings that are off set to ride on a good surface of the axle. They ride about 1/8" deeper, saves the expense of new axles.

eagleuh1 · 07-19-2010, 07:45 AM

That happened to me also. Be careful using the smaller one, not all hoses will fit in due to interference with the fitting on the hose and the bleeder screw. Drove me crazy trying to find a hose that would fit. I'd take the smaller one back and exchange for the larger one. Good luck.

cdowns · 07-19-2010, 07:56 AM

Quote:

Originally Posted by eagleuh1

That happened to me also. Be careful using the smaller one, not all hoses will fit in due to interference with the fitting on the hose and the bleeder screw. Drove me crazy trying to find a hose that would fit. I'd take the smaller one back and exchange for the larger one. Good luck.

no hose to rear wheel cylinder

eagleuh1 · 07-19-2010, 08:16 AM

My bad, that was on the front ones. I took the back ones back and exchanged them for the larger cylinders. Sorry. I also thought the smaller ones would give me less braking power. You'd think they have this stuff figured out, but.

frankdatank01 · 07-19-2010, 12:15 PM

I replaced the axle bearing and seals also. That was alot of fun.....

Good catch on the shoes reversed. I would have never noticed.

07-18-2010, 11:53 PM	#1
frankdatank01 Registered User Join Date: Jun 2007 Location: Dayton, Ohio Posts: 95	Oversized Rear Wheel Cylinder In the process of changing my 6-lug to 5-lug, I recently ordered the rear brake drum rebuild kit from ECE. I received two wheel cylinders, one good one and one bad one. Both Raybestos, both made in China. Both center sections are sized right and the bolt pattern distance is the same but it looks like they have two castings for the case. The larger one also does not fit between the "ears" on the backing plate as well. The rubber boots are really squeezed in there. I figured I'd post a pic to show the difference. (I've contacted ECE to get the right one). I also posted a before and after. From one side anyway... Frank You'll see the one on the left is slightly smaller and has less material Before rear drum rebuild (but after axles removed) After rebuild with new Moser 5-lug axles (was going to redrill the original axles but they both had alot of pitting on the outer bearing surface so new axles for me!)

07-19-2010, 12:07 AM	#2
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,134	Re: Oversized Rear Wheel Cylinder You have your new shoes on backwards. If you you replaced the axles due to pitting in the bearing surface you need to replace the bearings or you will trash your new axles

07-19-2010, 07:04 AM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Oversized Rear Wheel Cylinder yep shoes r wrong __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

07-19-2010, 07:41 AM	#4
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: Oversized Rear Wheel Cylinder Nice looking axles. Another possible choice is to purchase axle bearings that are off set to ride on a good surface of the axle. They ride about 1/8" deeper, saves the expense of new axles. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

07-19-2010, 07:45 AM	#5
eagleuh1 Registered User Join Date: Jul 2009 Location: Russellville, Arkansas Posts: 1,699	Re: Oversized Rear Wheel Cylinder That happened to me also. Be careful using the smaller one, not all hoses will fit in due to interference with the fitting on the hose and the bleeder screw. Drove me crazy trying to find a hose that would fit. I'd take the smaller one back and exchange for the larger one. Good luck.

07-19-2010, 08:16 AM	#7
eagleuh1 Registered User Join Date: Jul 2009 Location: Russellville, Arkansas Posts: 1,699	Re: Oversized Rear Wheel Cylinder My bad, that was on the front ones. I took the back ones back and exchanged them for the larger cylinders. Sorry. I also thought the smaller ones would give me less braking power. You'd think they have this stuff figured out, but.

07-19-2010, 12:15 PM	#8
frankdatank01 Registered User Join Date: Jun 2007 Location: Dayton, Ohio Posts: 95	Re: Oversized Rear Wheel Cylinder I replaced the axle bearing and seals also. That was alot of fun..... Good catch on the shoes reversed. I would have never noticed. Last edited by frankdatank01; 07-19-2010 at 12:16 PM.



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