As I posted a few years back most of the problems I experienced with this type of brake issue was excessive back pressure returning to the hyd. tank. The steering and braking system share the return to tank plumbing. First...get the drive wheels off the ground (use the tilt and tilt forward on blocks of wood or better jack and block under the frame to avoid tilt drift. Once the wheels are clear put the truck in forward...if the wheels turn on their own at idle turn the steering left or right...if the wheels lock up you have a back pressure issue...as in return to tank restriction. the flow valve is located on top of the transmission under the floorboards. the return line is tee'd to tank return. there is an adjusting screw in the valve behind the fitting where the tee is connected. behind the adapter fitting screwed directly to the valve you have access to an "Allen/hex head screw in the valve port it's self. Try both directions L/R a turn at a time and check the wheels and steering operation. ALSO be sure the brake valve ,which is mounted to the dash behind the steering column is pushed up as far as it will go and is well tightened. The weight of the valve ,if not tight, will apply the brakes on it's own...you should see no chrome on the spool valve and hear no hyd. "hiss" if the valve is tight and in the correct position (full up and bottomed on the lip edge). Clark may be able to tell you how /where to install a test gauge for more accurate adjustment...as I recall (10yrs.+) there is a fitting where the brake lines split off to each wheel...zero pressure when steering is used or brakes are not applied... a few lbs. is acceptable to keep the shoes out near the drums...very little drag and free of dust if possible.
Good luck my friend, Doug Ferguson (Fergie)

Olá, por favor. pode colocar uma foto da valvula onde está o problema? Minha forklift está com os freios travados. Obrigado

Olá, por favor. pode colocar uma foto da valvula onde está o problema? Minha forklift está com os freios travados. Obrigado

Littoral translation:
Hello, please. Can you place a photo of the valve where is it or problem? My forklift is like brakes braked. Thanks

That's great bagwan...just curious was it hyd. back pressure or something even simpler ? It's never too late to learn a new trick even an old dog like me!
Fergie

Hi Fergie, All fixed , your info was very helpful.

Hi Fergie ,

Thanks for the info, working through your suggestions.

Regards Bagwan.

Hi bagwan...I'm assuming the "valve" you mentioned was the brake actuator valve bolted to the dash. Clark went through a number of updates on the valve but I don't think that is your problem. With the floorboards off you can see that the power steering return to tank line is teed into the brake pressure return to tank line with a Y fitting. The hyd. priority valve that is mounted on top of the trans. has an adjustment available but you need to know where to look. Just for fun tilt the mast forward on a 4x4 to get the wheels off the ground if you can turn the wheels by hand Ok if not shut the truck off and bleed the back pressure as before at the line tee.Once you have the wheels turning freely by hand tighten the line and start the truck... do not touch the brakes... put the truck in gear, with the wheels up, and turn the steering side to side if the brakes come on as you do you most likely have excessive back pressure from the steering orbital applying the brakes. There is an adjustment screw in the priority valve. Truck off ! Look for the return line to tank on the right hand side of the valve ,remove the line, remove the adapter fitting from the valve and inside the valve there is an Allan key adjustment ,1/4" I believe, turning it CW increases back pressure CCW decreases BP as I recall. You may have to play around a bit , you either have super easy steering and brake issues or harder steering but less brake drag. If the brake pedal jolts your foot as you apply the brake that is the back pressure I'm speaking of. Also make sure there is some free play in the brake linkage , I remember an TI bulletin about loosening off the brake valve and prying it up as far as you can till it bottoms out on the frame and tightening in place this helps maintain the free play in the linkage. One last note if you get around to doing a brake job replace the shoe return springs and use good quality brake shoe material some of the stuff is hard as stone. Hope that points you in the right direction...good luck, Fergie