Wiper arm confussion

This probly no help to you wish I knew ws but my freight shaker did that and come to find out it was the bolt in the cowl hitting the linkage

 

If you pull the plastic covers off your pivots on the outside you will see the large nut that holds them on.


With your motor out, plug it in see if its working correctly or not. If it is, try and move your pivots with the arms on to see if they are free or not. If the motors fine then you most likely have a seized pivot, if the pivot seized and you left the motor on you could have also burnt the motor out.

You can get access to the driver side pivot from above the pedals inside the cab. The pass side pivot you can gain access to by removing the electrical junction on the outside of the firewall in the center. Four 1/4 inch bolts hold it on normally with a plastic cover unless its been broke off.

Hope this helps. I've had to do wipers on theses trucks too many times and its definitely one of the worst downfalls of a Western Star.

 

Its just a ball on the pivot with a bushing that snaps in on the bar. Takes some effort and normally smashing knuckles to get them apart.

 

Western star wiprt motor and it's going as it pleases, I shut it off and it goes sometimes it'll stop sometimes it won't?