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Author Topic:   Disc brake drag?
Hans olsson
Gearhead

Posts: 622
From: Sweden
Registered: Apr 2000

posted 09-08-2001 02:43 AM     Click Here to See the Profile for Hans olsson   Click Here to Email Hans olsson     Edit/Delete Message   Reply w/Quote
Hey everyone,is there a cure for this problem with the front brakes? The calipers are fitted with new seals and new pads. But the wheel do not turn to my liking. Btw we did improve our personal best at the last race of the year We even won the first round, but then the race was cancelled due to a problem with the track surface . Later.. Hans.

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  • 71 Mach1 351c
  • E/SA 11.89-110
  • F/SA 11.92-110

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Doc
Gearhead

Posts: 466
From: Redwood City, Ca. USA
Registered: Jan 2001

posted 09-08-2001 03:45 PM     Click Here to See the Profile for Doc   Click Here to Email Doc     Edit/Delete Message   Reply w/Quote
Hans, we've had stock type disc brakes that just won't turn free and others that'll run free as the breeze. Many times they can be worked over (blueprinted) and will turn very freely but the time, money and effort is only worthwhile if you "have" to use the stockers. The master cylinder residual pressure valve must be checked for how much it's holding at rest.

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"How come we choose from just two people
for president and 50 for Miss America?"

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Hans olsson
Gearhead

Posts: 622
From: Sweden
Registered: Apr 2000

posted 09-08-2001 06:42 PM     Click Here to See the Profile for Hans olsson   Click Here to Email Hans olsson     Edit/Delete Message   Reply w/Quote
Doc,thanks for the help. I think it`s time to have a look at the master cylinder. Later... Hans

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  • 71 Mach1 351c
  • E/SA 11.89-110
  • F/SA 11.92-110

IP: Logged

Hans olsson
Gearhead

Posts: 622
From: Sweden
Registered: Apr 2000

posted 09-09-2001 11:55 AM     Click Here to See the Profile for Hans olsson   Click Here to Email Hans olsson     Edit/Delete Message   Reply w/Quote
Doc, i bleed some brake fluid from the front calipers,BUT no improvement. Could the fault be whitin the calipers??


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  • 71 Mach1 351c
  • E/SA 11.89-110
  • F/SA 11.92-110

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Dr. Who
Gearhead

Posts: 164
From: Redwood City, Ca.
Registered: Sep 2001

posted 09-10-2001 01:31 AM     Click Here to See the Profile for Dr. Who   Click Here to Email Dr. Who     Edit/Delete Message   Reply w/Quote
It could be the calipers. If they are gummed up so the pistons can't return all the way, if you just resealed them this shouldn't be the case. Just for kicks you might try prying the pucks away from the rotors a couple of times to see if they return better on their own after they've been applied. If they are just tight so it takes alot of effort to move them, they can be disassembled and fitted so each piston moves free throug total travel, in some rare cases the caliper can be cocked or crooked the the rotor so you need to do a bit of detective work too.

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I was "Doc" but something happened to my ID.

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Hans olsson
Gearhead

Posts: 622
From: Sweden
Registered: Apr 2000

posted 11-04-2001 10:41 AM     Click Here to See the Profile for Hans olsson   Click Here to Email Hans olsson     Edit/Delete Message   Reply w/Quote
Doc,i had a look inside one caliper today, .Not a pretty sight! After a cleanup and new assembly lube, the wheel turns perfectly . Maybe i need to do this every winter.Thanks for your help.

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  • 71 Mach1 351c
  • E/SA 11.89-110
  • F/SA 11.92-110

IP: Logged

Hans olsson
Gearhead

Posts: 622
From: Sweden
Registered: Apr 2000

posted 11-24-2001 03:18 AM     Click Here to See the Profile for Hans olsson   Click Here to Email Hans olsson     Edit/Delete Message   Reply w/Quote
I later discovered that if you fit a new mounting kit(guide pins,rubber bushings,stabilizer and retaining springs)and have the rotors turned the results are even better. The pads and rotor need to be absolutely parallel.

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  • 71 Mach1 351c
  • E/SA 11.89-110
  • F/SA 11.92-110

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 11-24-2001 01:09 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
OEM disc brakes need to be checked, rebuilt if neccasary, and bearings repacked with a synthetic grease every year on a stocker Hans. You can loose as much as .010 if they are too tight.

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Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
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Hans olsson
Gearhead

Posts: 622
From: Sweden
Registered: Apr 2000

posted 11-24-2001 01:46 PM     Click Here to See the Profile for Hans olsson   Click Here to Email Hans olsson     Edit/Delete Message   Reply w/Quote
Not to mention losing ones breath when you push it around . Synthetic grease .Never thought of that,thanks Alex.

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  • 71 Mach1 351c
  • E/SA 11.89-110
  • F/SA 11.92-110

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