fld120 steering problem ! pls someone help me !

last 3 times that this problem has come to my shop,2 were the shaft u joint at the gear box the other was the u joint inside the cab at top of shaft.they seemed good at first glance until removed and checked.good luck.

 

Have you tried jacking both steering tires off the ground to see if it still does it?

To me it sounds like something is binding up?

 

Have you checked the front spring hanger and leaf spring bushings at the front and back of the leaf spring?Have you checked the rear suspension out? Check rear axles for alighnment,bad bushiings in the tourqe arms.does it have the airliner suspension? Last place I had worked had a few of them on dumps they rode ok but the air leafs would never stay in place if I remember right we ended up welding some blocks to keep them centered it has been 7 or 8 years so don't hold me to it.also just because the steering box was replaced dosent mean its good I had a problem a while back truck was all over the road put a reman box from rush pb was even worse tried adjusting the box and couldent get the play out of it swapped another reman box and haswnt been back.

 

That does help. Did the truck have the king pins replaced before you got it? It could have a burr on one and could cause this also.

 

Another question... on a car hauler do they have the cab lowered closer to the frame than normal? What do the cab mounts look like? If they are worn out it could cause it by binding up the steering shaft.

 

I would drop the tierod from both steering arms, also remove draglink, lift frontend, rotate each tire by hand through full steering movement checking for tight king pins. If no problem found, I would go to the steering gear. The gear has a built in tight spot at center steer. If it is adjusted too tight it will bind before it hits the center of the high point of the gear.