I tend to disagree with a few posts-Hope no body gets offended. On my 91 CC dually I had brake problems.Let me remind all I did was tow a 30 ft Gooseneck (sometimes heavy -sometimes real heavy 20,000 to 26,000 +) several hundred thousand miles.
When I first got the truck I was impressed by the brakes.
My brakes started fading when stopping,it got pretty bad & unsafe.Finally I lost them all together,luckily I was home.I bled them over & over no luck.I replaced the master cylinder got brakes next morning -no brakes-no fluid loss.Bled -bled (I always bled the RABS valve als
ff to the parts store,tell him my problem he gives me another master cylinder-bleed-bleed,no luck.Back to store another master cylinder-same-same-(I had checked every thing else -rebuilt rear wheel cyls-manually adjusted rear brakes-calipers were not very old). Finally while bleeding I got brakes-wow! They would fade some if held but a test drive told me after stopping normal pressure on the pedal wpould hold it fine.
Off to Maine from Oklahoma with 3 tractors.
In NY state -lost brakse to severe pedal fade.
Bleed -bleed hours of bleeding-I got a spongy brake but a good stopping brake.several thousand miles in indiana -bad brakes.Went to a shop they bled -bled-bled -no brakes.I buy another master cylinder(by now I'm totally lost confused & mad as the devel)he got some brakes for me- off I got in the middle of the night (luckily I was empty) only 150 miles - no more brakes. Slipped home in the night 300 miles on my trailer brakes.
Another Master cylinder -no brakes-desperate -loads to haul and no brakes.To the books-study in detail how the RABS valve works! Quick bypass of the RABS (the bad part is I didn't have the fittings to adapt to the Ford fittings on the RABS) Cut -flare -bend -use a union.Bleed WOW! hard brakes! That was in 2003 still working fine now( I have changed the fuluid a few times).-almost jacknifed in a panic stop on a dirt Rd (rear brakes locked)-fortunatly there waas a road to the left I floored it whipped a left turn and slide some got it straight
.
Today the brakes are still fine-I sold my trailer,and now I occasionally drive it with no load (I almost never drove it without a trailer) I have too much brakes and want to put a new RABS valve back on.
You be the judges what was my problem??