c20 front drums removal - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nrb's70gmc · 07-12-2018, 06:15 PM

Hello everyone quick question

i need to get access to the wheel studs on front of my truck
i pulled the dust cover -spindle nut-the notched washer-2 flat head screws

now im stuck how in the heck does the drum come off? i cant get the bearings our couse i cant get a good grip on them.

the drum budges a tiny bit but thats it

**Steeveedee** · 07-12-2018, 08:44 PM

There is probably a small ridge at the inside edge of the drum where the brake shoes don't rub it and wear the drum. You will have to back off the adjusters.

nrb's70gmc · 07-12-2018, 09:50 PM

Quote:

Originally Posted by Steeveedee

There is probably a small ridge at the inside edge of the drum where the brake shoes don't rub it and wear the drum. You will have to back off the adjusters.

Might be a dumb question but which way should I spin the adjusting knob?
Up or down to back off?

**WorkinLonghorn** · 07-12-2018, 10:06 PM

I can't remember off-hand but you turn them one way and it will either solve your problem or make the drum hard to turn, in which case you go the other way. -BA

nrb's70gmc · 07-13-2018, 12:05 PM

ware the heck is the adjustment slot on front drums? dont see anything on backing plate

**Steeveedee** · 07-13-2018, 01:37 PM

It may have never been knocked out. Look for an indentation about an inch long and 1/4" wide. Might be a little bigger each way. Should be in the backing plate, though some drums have the knockout as well.

07-12-2018, 06:15 PM	#1
nrb's70gmc Registered User Join Date: Sep 2008 Location: magalia,ca Posts: 366	c20 front drums removal Hello everyone quick question i need to get access to the wheel studs on front of my truck i pulled the dust cover -spindle nut-the notched washer-2 flat head screws now im stuck how in the heck does the drum come off? i cant get the bearings our couse i cant get a good grip on them. the drum budges a tiny bit but thats it __________________ 1970 2wd 3/4 ton- 2004 crate 350 thorley tri-y headers-edelbrock performer eps manifold 600cfm performer carb, crane cams energizer cam,lifters, dual 2.5 magnaflows, mallory HEI, powermaster 140 amp altenator, griffen aluminum radiator.(8 MPG)

07-12-2018, 08:44 PM	#2
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,807	Re: c20 front drums removal There is probably a small ridge at the inside edge of the drum where the brake shoes don't rub it and wear the drum. You will have to back off the adjusters. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

07-12-2018, 10:06 PM	#4
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,886	Re: c20 front drums removal I can't remember off-hand but you turn them one way and it will either solve your problem or make the drum hard to turn, in which case you go the other way. -BA __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

07-13-2018, 12:05 PM	#5
nrb's70gmc Registered User Join Date: Sep 2008 Location: magalia,ca Posts: 366	Re: c20 front drums removal ware the heck is the adjustment slot on front drums? dont see anything on backing plate __________________ 1970 2wd 3/4 ton- 2004 crate 350 thorley tri-y headers-edelbrock performer eps manifold 600cfm performer carb, crane cams energizer cam,lifters, dual 2.5 magnaflows, mallory HEI, powermaster 140 amp altenator, griffen aluminum radiator.(8 MPG)

07-13-2018, 01:37 PM	#6
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,807	Re: c20 front drums removal It may have never been knocked out. Look for an indentation about an inch long and 1/4" wide. Might be a little bigger each way. Should be in the backing plate, though some drums have the knockout as well. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA



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