Caliper fixed itself with a hard stop?
Thread Starter
|
More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
Caliper fixed itself with a hard stop?
I recently had my all too often dragging rear caliper. Tell tale smell and the back of the hand test showed driver rear hotter than the passenger rear. Next time out I took my infrared thermometer and confirmed the temperature difference. Anyway, I put off checking it out due to a sore knee for weeks. A situation came up that I had to use the truck for a short trip to the vet. On that trip a teen crossed the road on a busy highway causing me to panic stop. I do not do very much hard braking. The truck sits a lot and mostly highway miles when not sitting. I also do not race to the traffic lights-unless of course someone wants to race and there are no cops. After that trip with the panic stop, my caliper went right back to behaving, with temperatures a couple of degrees apart. Could mild use of the brakes play a part in the often sticking calipers?
Cargo Master
Joined: Oct 2018
Posts: 2,811
Likes: 1,908
From: unfortunately Germany
An occasional hard use of the caliper can delay a sticking of the piston. A final solution brought me the overhaul of the calipers and, very important,: the insertion of the pistons with a special brake piston paste!
The pistons are normally inserted dry, that is the problem. At some point they are then stuck.
The pistons are normally inserted dry, that is the problem. At some point they are then stuck.
Cargo Master
Joined: Oct 2018
Posts: 2,811
Likes: 1,908
From: unfortunately Germany
Hotshot
Joined: Dec 2014
Posts: 17,829
Likes: 3,113
From: Jersey Shore
We never installed pistons dry in 25 years—brake assembly lube, silicone grease, brake fluid, in that order.
If you have some adhesion of the piston to its sealing ring, or with the caliper pins - to the boots or lower front pin stupid hysteresis ring. We could have even brand new calipers (not reman) hang up a piston and get it to release by pushing the piston all the way back into the bore, nothing else. We would be breaking the stiction and lubing it as the normal contact surface would now have brake fluid there to lube.
If you have some adhesion of the piston to its sealing ring, or with the caliper pins - to the boots or lower front pin stupid hysteresis ring. We could have even brand new calipers (not reman) hang up a piston and get it to release by pushing the piston all the way back into the bore, nothing else. We would be breaking the stiction and lubing it as the normal contact surface would now have brake fluid there to lube.
Thread Starter
|
More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
That was some interesting reading Hartwig. Thanks for chiming in Jack. I know another in depth brake discussion wasn't needed. I thought it was interesting in that maybe some hard stops might get you home if it happens on the road-like it always would. Lazy me would like to think it will stay fixed but I know I just bought some time.
Cargo Master
Joined: Oct 2018
Posts: 2,811
Likes: 1,908
From: unfortunately Germany
I think many parameters play a role in this story. The vehicles with an ABS braking system are not allowed to use silicone brake fluid (at least here in Europe).
My 1984 Blazer K5 has the silicone brake fluid in the system. I have had never problems there. I hade after 37years there the first time the caliper renewed as a precaution, they worked without defects until the removal. At the Superduty every 1-2 years a caliper piston was stuck (last time in Ireland in middle of nowhere). Brake fluid I use on the vehicle is DOT3. Since I have installed the pistons with the paste, the caliper function completely inconspicuous.
At this time I also thought I had a ABS issue .
My 1984 Blazer K5 has the silicone brake fluid in the system. I have had never problems there. I hade after 37years there the first time the caliper renewed as a precaution, they worked without defects until the removal. At the Superduty every 1-2 years a caliper piston was stuck (last time in Ireland in middle of nowhere). Brake fluid I use on the vehicle is DOT3. Since I have installed the pistons with the paste, the caliper function completely inconspicuous.
At this time I also thought I had a ABS issue .
Hotshot
Joined: Dec 2014
Posts: 17,829
Likes: 3,113
From: Jersey Shore
Let’s be clear, I believe you did a lot more to the calipers and pistons than just use the paste.
Trending Topics
Cargo Master
Joined: Oct 2018
Posts: 2,811
Likes: 1,908
From: unfortunately Germany
Of course Jack. But, no matter which caliper I had mounted from which manufacturer before, I always had problems.
However, I could not find new ones from Ford (OE).
However, I could not find new ones from Ford (OE).
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Hotshot
Joined: Dec 2014
Posts: 17,829
Likes: 3,113
From: Jersey Shore
I’m on my cell in the middle of a field of trees right now, so not going back to look. But from what I remember you did an excellent job cleaning the bores out and turned the pistons to make them round again. That was after swell and growth. So the pistons should not continue to do that and will stay in diameter. That would be a bigger change, IMO.
Thread Starter
|
More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
I have done several runs since my caliper was exercised and it is still behaving. I have a couple of places I can do some harder stopping without causing any safety issues on my normal route to maybe keep them happier.
Thread
Thread Starter
Forum
Replies
Last Post
bigtexan99
1999 - 2003 7.3L Power Stroke Diesel
7
Oct 24, 2014 01:14 PM
cw_mi
Excursion - King of SUVs
14
May 23, 2013 10:19 PM
250FordTruck
Brakes, Steering, Suspension, Tires, & Wheels
3
Feb 3, 2009 07:59 AM