Cause of hard brake pedal? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

LilD · 11-05-2010, 07:39 AM

The brakes have been fine on my old truck until yesterday. Coming home from work the pedal got realy hard and it took some extra time to get the truck to stop. Checked the fluid level when i got home and it was fine. What would cause this issue?

71meangreenc10 · 11-05-2010, 08:04 AM

Power or manual brakes?

Smitty

*Shane* · 11-05-2010, 08:07 AM

sounds like an identical problem I had ... it turned out to be a bad booster.

cam.man67 · 11-05-2010, 09:57 AM

Oh, so it stops like my truck does when in working fine?

Sounds like a bad booster to me.

LilD · 11-05-2010, 10:32 AM

Sorry I didnt elaborate. Power brakes.

Alex Hayley · 11-05-2010, 10:39 AM

Check your vacuum connections to the booster first.

LilD · 11-08-2010, 12:28 PM

Quote:

Originally Posted by Alex Hayley

Check your vacuum connections to the booster first.

Winner winner chicken dinner!
That couldve been an expensive lesson!
Hole in the vacuum hose

71chevy72 · 06-14-2012, 02:59 PM

I am having the same problem with my 72 C30 just changed the master cylr.thought that was the issue but I'll check my hoses too. Does any know what kind of booster came stock on them??? And if it is connected to the power steering or the engine?
Posted via Mobile Device

ChevLoRay · 06-14-2012, 03:41 PM

These trucks, okay most of the 1-ton and under, had vacuum power brakes. Once you get over a ton (C-40 and up, plus a few C-30's) they may have another type, but not necessarily. I don't have my book in front of me, and I don't want to go on record for having lied.

crazy longhorn · 06-14-2012, 06:33 PM

Quote:

Originally Posted by ChevLoRay

These trucks, okay most of the 1-ton and under, had vacuum power brakes. Once you get over a ton (C-40 and up, plus a few C-30's) they may have another type, but not necessarily. I don't have my book in front of me, and I don't want to go on record for having lied.

Havent seen you for a while....jump back in, & help this old man give the young ones "chit"....or just help em out

I am not afraid to be called a lier...been told that many times, when I told it "square up"!

I know, that you are thinking about parting you old truck(sometimes you do what you have to)....but comeon back, & help the young guys.....hell, you have done your time in these old trucks....& you know a trick or 2, that you can teach

. crazyL

11-05-2010, 07:39 AM	#1
LilD Registered User Join Date: Oct 2009 Location: Tucson, AZ Posts: 186	Cause of hard brake pedal? The brakes have been fine on my old truck until yesterday. Coming home from work the pedal got realy hard and it took some extra time to get the truck to stop. Checked the fluid level when i got home and it was fine. What would cause this issue?

11-05-2010, 08:04 AM	#2
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,159	Re: Cause of hard brake pedal? Power or manual brakes? Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time

11-05-2010, 08:07 AM	#3
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: Cause of hard brake pedal? sounds like an identical problem I had ... it turned out to be a bad booster.

11-05-2010, 09:57 AM	#4
cam.man67 Registered User Join Date: Jun 2010 Location: Jefferson, MD Posts: 2,397	Re: Cause of hard brake pedal? Oh, so it stops like my truck does when in working fine? Sounds like a bad booster to me. __________________ '68 Dodge Dart 270, 225, 904, 2.76--"Lucy" 1996 Gmc 1500 Z71, 350, 4l60e, 3.73s 1995 Jeep Wrangler Rio Grande 2.5, AX5, 4.10s 1989 Toyota Pickup 22re, auto, 3.73

11-05-2010, 10:32 AM	#5
LilD Registered User Join Date: Oct 2009 Location: Tucson, AZ Posts: 186	Re: Cause of hard brake pedal? Sorry I didnt elaborate. Power brakes.

11-05-2010, 10:39 AM	#6
Alex Hayley Registered User Join Date: Jul 2000 Location: NC Posts: 987	Re: Cause of hard brake pedal? Check your vacuum connections to the booster first.

06-14-2012, 02:59 PM	#8
71chevy72 Registered User Join Date: Mar 2012 Location: Golden Colorado Posts: 60	Re: Cause of hard brake pedal? I am having the same problem with my 72 C30 just changed the master cylr.thought that was the issue but I'll check my hoses too. Does any know what kind of booster came stock on them??? And if it is connected to the power steering or the engine? Posted via Mobile Device

06-14-2012, 03:41 PM	#9
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: Cause of hard brake pedal? These trucks, okay most of the 1-ton and under, had vacuum power brakes. Once you get over a ton (C-40 and up, plus a few C-30's) they may have another type, but not necessarily. I don't have my book in front of me, and I don't want to go on record for having lied. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.



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