Parking brake

[adsmith72]

Has anyone ever tried to retro fit or modify the old style brake to work like a newer one? Maybe on on a solenoid or a cable or something that works better. Im looking at some ideas for this and wanted to get input from the group. Thanks

 

[largestal]

Love to get an answer on this as well. Mine is driving me nuts!

 

[Tazza]

Love to get an answer on this as well. Mine is driving me nuts!

The only way i can see that could work is using a servo motor like in recliner chairs. You will need quite a bit of force to engage the brake so it won't slip.
The newer style essentially has a block that slides into a segmented brake disc to lock it. There is no constant clamping force like the older style machines use. I honestly don't know how successfull you will be, yet i'd like to hear how you go all the same.

 

[adsmith72]

The only way i can see that could work is using a servo motor like in recliner chairs. You will need quite a bit of force to engage the brake so it won't slip.
The newer style essentially has a block that slides into a segmented brake disc to lock it. There is no constant clamping force like the older style machines use. I honestly don't know how successfull you will be, yet i'd like to hear how you go all the same.

Ok, I have been looking into the retro fit. I have a few questions. What is the spring on the bottom of the traction lock bar for? Doesnt seem to be right to engage the brake discs. Was there a bobcat that had the traction block Without the bics system? I know they had one that used a foot style lever with a switch for the traction lock. I need to know how they were controlling the solenoid before they had the bics controller. The solenoids are two stage three wire and require a Controller to switch of the pull circuit, or they get hot and burn up. You can buy a controller , but i would rather stay with bobcat parts, so its easier. Thanks

 

[Tazza]

Ok, I have been looking into the retro fit. I have a few questions. What is the spring on the bottom of the traction lock bar for? Doesnt seem to be right to engage the brake discs. Was there a bobcat that had the traction block Without the bics system? I know they had one that used a foot style lever with a switch for the traction lock. I need to know how they were controlling the solenoid before they had the bics controller. The solenoids are two stage three wire and require a Controller to switch of the pull circuit, or they get hot and burn up. You can buy a controller , but i would rather stay with bobcat parts, so its easier. Thanks

The spring is there to take the pressure off the brake disc when not in use.
There were no ones that were made without a BICS or BOSS system.
There is no reason why you can't do it still without the computer. You wire up the hold coil to the switched power from the key. Install a push button to take the brake off on the dash. You press it to power the pull coil then let it go, the hold coil will hold it in place. To lock the brake again turn the key off and it will lock. You could even put another switch on the hold coil wire to turn the brake on so you don't nee dto shut the machine down?
Hopefully some of taht made sense....

 

[adsmith72]

The spring is there to take the pressure off the brake disc when not in use.
There were no ones that were made without a BICS or BOSS system.
There is no reason why you can't do it still without the computer. You wire up the hold coil to the switched power from the key. Install a push button to take the brake off on the dash. You press it to power the pull coil then let it go, the hold coil will hold it in place. To lock the brake again turn the key off and it will lock. You could even put another switch on the hold coil wire to turn the brake on so you don't nee dto shut the machine down?
Hopefully some of taht made sense....

Damn that was a great answer. I love it. I think im going to try it. I may have a ffew more questions later.

 

[adsmith72]

Damn that was a great answer. I love it. I think im going to try it. I may have a ffew more questions later.

Does anyone know if a the brake discs off a 753 part no 6707254 will fit the drive spdockets on my 642b. The no for the brake disc on the 642b is 6559206. If they fit i would not have to modify mine.

 

[Tazza]

Does anyone know if a the brake discs off a 753 part no 6707254 will fit the drive spdockets on my 642b. The no for the brake disc on the 642b is 6559206. If they fit i would not have to modify mine.

I don't think they are. I know my 743 has a hexagional cut out inside to slip over a matching 'gear'. The 753 machines have a standard sporcket cut out that they slide over, sort of like a mulit-point star.

 

[adsmith72]

I don't think they are. I know my 743 has a hexagional cut out inside to slip over a matching 'gear'. The 753 machines have a standard sporcket cut out that they slide over, sort of like a mulit-point star.

Ok. I know i can make it all work, but the biggest problem i am having is the brake disc. I cant seem to find a newer style disc withe the lobes that will fit my sprockets. Mine only have three small ears that engage the sprocket and that wont be enough. I can cut the lobes in but putting more teeth on the inside would be more difficult. I was thinking of welding my discs to my sprockets. Would that be a big mistake? I know it is pretty much ruin the sprokes ic i needed to remove the discs at a later time. What are your thoughts on welding them? Thanks Aaron

 

[Tazza]

Ok. I know i can make it all work, but the biggest problem i am having is the brake disc. I cant seem to find a newer style disc withe the lobes that will fit my sprockets. Mine only have three small ears that engage the sprocket and that wont be enough. I can cut the lobes in but putting more teeth on the inside would be more difficult. I was thinking of welding my discs to my sprockets. Would that be a big mistake? I know it is pretty much ruin the sprokes ic i needed to remove the discs at a later time. What are your thoughts on welding them? Thanks Aaron

I would advise against welding them to the sprockets. They are made to allow for some mis-alignment. Welding the old disc to the new one may be an option. Cut the middle out of the new one and cut the old one down to fit. Carefully weld them together to try and prevent warping.

 

[7LBSSMALLIE]

MAYBE IM MISSING SOMETHING YOUR LACK OF REFERANCE TO A MODEL OR S/N LEAVES QUESTIONS AS TO WHAT IS OLD STYLE. THE 610? THE N743 CLAMP STYLE OR THE POSITIVE ENGAGE DROP IN AS THE 763 F I SHOULD SAY THAT FIRST OFF IF STEERING ADJUSTMENNT / NEUTRAL IS GOOD, THIS SHOULDNOT BE AN ISSUE,, trying not to be a dick here, would like to help, if you got questions about bobcats i been there and done that. need a little more info(once again if i come off a little harsh) thats just me i deal with it everday and it gets old, and that in of of self was harsh .sorry dude

 

[adsmith72]

MAYBE IM MISSING SOMETHING YOUR LACK OF REFERANCE TO A MODEL OR S/N LEAVES QUESTIONS AS TO WHAT IS OLD STYLE. THE 610? THE N743 CLAMP STYLE OR THE POSITIVE ENGAGE DROP IN AS THE 763 F I SHOULD SAY THAT FIRST OFF IF STEERING ADJUSTMENNT / NEUTRAL IS GOOD, THIS SHOULDNOT BE AN ISSUE,, trying not to be a dick here, would like to help, if you got questions about bobcats i been there and done that. need a little more info(once again if i come off a little harsh) thats just me i deal with it everday and it gets old, and that in of of self was harsh .sorry dude

I was considering retro fitting a positiv engagement brake on a 642b with the puck clamping style. I had the machine apart a was looking at a retro fit. I had found all the parts and they were not much. The main problem was the brake disc. The disc on the 642b only have three small teeth that engage the sprocket. I dont know enough about the other models that have the lobed disc to find one that will fit the 642b sprockets. Thats if any will. I was looking at the 753 stuff, because thats whats most avalible. the discs will not fit my sprockets. I would think that a 553 with a newer type brake would be the closest fit, but i dont have access to any parts lookup for those. As far as being adjusted correctly. Mine has almost no creep , but yet i can move slightly. Also i really hate the clamping style brake. I cant believe they used that brake design for so many years. Thanks

 

[Bobcatdan]

I was considering retro fitting a positiv engagement brake on a 642b with the puck clamping style. I had the machine apart a was looking at a retro fit. I had found all the parts and they were not much. The main problem was the brake disc. The disc on the 642b only have three small teeth that engage the sprocket. I dont know enough about the other models that have the lobed disc to find one that will fit the 642b sprockets. Thats if any will. I was looking at the 753 stuff, because thats whats most avalible. the discs will not fit my sprockets. I would think that a 553 with a newer type brake would be the closest fit, but i dont have access to any parts lookup for those. As far as being adjusted correctly. Mine has almost no creep , but yet i can move slightly. Also i really hate the clamping style brake. I cant believe they used that brake design for so many years. Thanks

The clamp style brake will stop a 642b dead in it's tracks if properly adjusted. People don't know how to set the correctly. I can get them so tight, you can almost not set the brake. There is no way a litte gasser 642 is going to drive threw that.