Re: another abs/traction control post

Posted by The tractor vet on January 26, 2016 at 08:44:13 from (104.179.81.68):

In Reply to: another abs/traction control post posted by glennster on January 26, 2016 at 06:09:35:

My first experience with ANTI LOC braking systems was on a 1977 IH 4300 semi with a brand new shiny East all aluim. dump trailer on it's second load . I was on a four lane high way running the speed limit , some guy out in ft. of me made a left turn into the media strip and stopped half way in and half way out i started to slow down and look for a place to move over as i was in the left lane passing slower trucks . The next thing i know this guy makes a hard right turn back on to the highway in my lane and plum plants it dead stop . The Jake brake is on full and i come down on the brake pedal hard and i hear the brakes release , now with both feet on the brake pedal the hand vale bent almost around the steering column and latterly breaking the knobs off the air control valves the truck say AH NOPE I AIN'T STOPPEN and i rear ended the car , NOT good . Call the Bear and he shows up and the questions start . He starts looking and comes up to me and says i do not see any skid marks didn't you even try and stop ?? Yes i tried everything to stop and one of the witnesses chimed in and yes he was trying to stop and all i heared was his air release but the brake lights were on another guy say yes he was trying to as he had his Jake on way before as he was slowing down before the guy pulled back out on to the road and stopped dead in ft. of him. The cop looks at me and says does you truck have anti loc brakes and i said yes and so does the trailer as this whole outfit is less then five months old and the trailer is two days old. The bear then informs me that he had just left another wreck that involved a semi that was brand new that did not stop and released all the air and did not reapply before he came to this one . Other then a dented ft. bumper and a broke fog light and a damaged ego i was ok and the people in the car were ok , Turns out the driver did not have a licence and cold not speak english . Now had that been and older truck i would NOT have hit that car and there would have been eighteen tires with huge flat spots on them . When i got the truck home every wheel sencor was removed all computer control valves removed and replaced with non ANTI SKID valves , NOW when you layed into the brakes it STOPPED . Second time experience with ANTI lock brakes was on my 88 Ford F350 while pulling my trailer . When the outside air temp went above 80 degrees and on a LONG steady pull when you went to stop YOU HAD NO and i mean NO brakes at all on the truck , the pedal would go all the way to the floor , First time that i lost all brakes on the truck i was hauling a tractor north bound on Ohio Rt 11 , a four lane highway that runs from the Ohio river all the way up to lake Eire . From the time you get off I 80 and head north in 11 till you get past U S Rt. 6 it is all up hill but it looks flat for the most part to some one driving a car or pick up , BUT not to someone driving a loaded semi as you are working the snot out of it to maintane highway speed , same hold true if your pulling loaded trailer with a pick up . I had a oliver 1850 on the deck and i was running the fityfive MPH but you were working the engine to hold that speed . I was only going about half way to Rt 6 , as i was getting off the 5 and 88 exit i was letting it drift down in speed and down shifted to third and went to push on the brake to stop and as i pushed down on the pedal NOTHING was happening and now the brake pedal was on the floor , ok plan B use the trailer brakes , yea i know the brakes are adjusted up correctly and that all magnits are good and all the brake lining is excelent and so they SHOULD STOP ME , ah NO they do not stop you they SLOW YOU DOWN , Luckly no one was coming and i did get it slowed down even with the E/brake to make the rt turn and limp it on up to the farm i was headed to and see why i lost all my brakes . After the tractor was unloaded i started checking to see if i blew any lines and found nothing , BUT i did have brake fluid running out of the master cylinder from the cap. Why is it leaking from thr cap ?? and the master cylinder is now OVER FULL ???? So you have a mushy brake pedal then you MUST have air in the lines , So lets open the wheel cylinder and see . Started on the right rear and it was like yea there is fluid oh now there is AIR , Why ?? As i contuined to bleed the system there was a lot of air thru the whole system . HOw can there be AIR in a sealed system? I knew everything was good to go on the truck as i just serviced it the night before ??? change oil greased fluid levels all checked from ft to back top to bottom . After bleeding and topping off the brake fluid i had good brakes . Brakes worked just fine TILL THE NEXT time i was on a long had pull for and extened period of time while running highway speeds and the same thing happened on a warm day . Talked to everybody i knwe about this ,talked to a Ford factory rep( He was about as dumb as a box of rocks) Kept telling me that there was NOWAY this could happen. Then it did it again and each time the brake fluid was pushed out of the master cylinder and you had nothing. Here FORD placed the master control valve down on the left inside of the frame rail next to the left exhaust pipe and the heat from that 460 even though there was this tiny little heat shield next to the valve it would heat the valve and cause the brake fluid to expand and cavitate the valve and when you came down on the brakes you had NO FT> BRAKES and YOU HAD NO REAR BRAKES till you went and bleed the system and added MORE fluid . SOOOOOOOooooo the cure for this problem was removal of the valve and move the brake lines feather away from the left exhaust down pipe. NOW you had brakes aon oh yes i forgot about the stator ring that came off the rear end ring gear carrier and ate a ring and pinion . So if i say i do not like anti loc brakes forgive me . somehow i managed to drive many years on all road conditions with out anti loc brakes and of all them OLD hopped cars i had and got along just fine with out tractoin control , if ya wanted TRACTION ya put better tires on it added a posi and learned to BACK out of it till ya got traction. In other workd LEARN HOW TO DRIVE .

Replies:

• Re: another abs/traction control post Mark Robke 12:16:04 01/26/16 (0)

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