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12-04-2010, 01:08 AM
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#1 |
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Registered User
Join Date: Sep 2010
Location: Abilene Kansas
Posts: 78
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Brake issues
I parked my 64 Panel a week ago. Today I jumped in to take a drive down the road and my brake pedal is rock hard and front brakes are locked up. What could have happened? A week ago it was just fine no issues. I know it has a new master and brake booster i just installed that like a month ago when I did the disk brake conversion repairs (Prior owner already did conversion but did a horrible job at it) I am going to try replacing the rubber hoses tomorrow and see if that helps but wanted to see what you experts may think it could be before I throw tons of cash at it....
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"If it throws you back in the seat when it shifts, it was slowing down before it shifted"  Disturbed Customs 1992 Chevy 1/2 ton 4x4 wore out 350 1975 Chevy 3/4 ton 4x4/ 8" suspension lift/ 468 Big Block/ 4 speed/ 4.56 gears/ 17' American Racing simulated beadlocks with Pro Comp 37x12.50 tires 1950 Pontiac Chieftain Straight 8/Hydromatic tranny |
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12-04-2010, 02:09 AM
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#2 |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,250
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Re: Brake issues
Which booster and master did you install? It sounds like your pedal to booster pushrod may be too long and not allowing the piston in the master cylinder to retract all the way. It could also be the short pushrod between the booster and the master. Is that one adjustable?
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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12-04-2010, 02:45 AM
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#3 |
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Registered User
Join Date: Oct 2006
Location: San Jose NOR*CAL
Posts: 3,080
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Re: Brake issues
I m thinking the booster too. Check the vacum hose make sure it is not cracked or has slip off. Also check the check valve
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1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... " |
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12-04-2010, 02:51 AM
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#4 |
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Registered User
Join Date: Sep 2010
Location: Abilene Kansas
Posts: 78
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Re: Brake issues
I used factory 72 chevy brake booster and master..I am not sure about a center rod between master and booster I bought them as a complete unit....I will check the pedal to booster rod in morning.. But if rod was to long why would it have worked for several weeks and then just stop working suddenly after being parked for a week. Also if hose had slipped off it woud explain the hard pedal but not the front brakes being locked. But I will look at it tomorrow morning and see..I am hoping it is something simple...... I need to figure this out or it will drive me nuts...
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"If it throws you back in the seat when it shifts, it was slowing down before it shifted" Disturbed Customs 1992 Chevy 1/2 ton 4x4 wore out 350 1975 Chevy 3/4 ton 4x4/ 8" suspension lift/ 468 Big Block/ 4 speed/ 4.56 gears/ 17' American Racing simulated beadlocks with Pro Comp 37x12.50 tires 1950 Pontiac Chieftain Straight 8/Hydromatic tranny Last edited by scubasteve16; 12-04-2010 at 02:55 AM. |
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12-04-2010, 12:12 PM
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#5 |
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Registered User
Join Date: Sep 2008
Location: San Carlos, Ca.
Posts: 3,048
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Re: Brake issues
I've had that happen with brake hoses that break down on the inside actually creating a one way valve of sorts. When they get old, the inside of the hose flakes off and plugs the line while it's trying to return the fluid to the master. I've never had it happen to both front brakes at the same time though.
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Chris '63 k15 long step Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205  52" front and 63" rear spring swap D44 / 14bff - disc axles Milemarker 9K and 10.5K hydraulic winches 63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29 |
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12-04-2010, 10:39 PM
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#6 |
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Registered User
Join Date: Sep 2010
Location: Abilene Kansas
Posts: 78
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Re: Brake issues
Well replaced the hoses and it didnt make a difference....I looked at the rod from the pedal to booster and it was kinda tight leaving no freeplay so I found problem for some reason the freeplay went away and I was driving with the brakes 1/4 pushed....Its all fixed now...So looks like CaptainFab was the man with the knowledge...
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"If it throws you back in the seat when it shifts, it was slowing down before it shifted" Disturbed Customs 1992 Chevy 1/2 ton 4x4 wore out 350 1975 Chevy 3/4 ton 4x4/ 8" suspension lift/ 468 Big Block/ 4 speed/ 4.56 gears/ 17' American Racing simulated beadlocks with Pro Comp 37x12.50 tires 1950 Pontiac Chieftain Straight 8/Hydromatic tranny |
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