Anyone know how to do this? The Haynes manual I have only covers removing the blade.

I removed the plastic piece at the base of the arm covering the nut. I removed the nut but the arm is still stuck on the motor. HELP!!!!

 

Just pull up on it! Mine came off real easy. Maybe you can put something underneath and pry it off without marring the cowl.

 

On my truck all you have to do is take a screwdriver and pop open the clip. Where the arm commects to the motor shaft there is a little clip looking thing. Use a thin screwdriver and open the clip by inserting the blade from the front of the vehicle. Its very easy to open and then the arm just pulls off. No need to pry or pull hard. Hope this helps!

 

My passenger side arm removed itself a short time back,,,,,98

 

I'm a putz... should've looked at my truck before I posted...


-Joe-

 

By now you've probably found that it's a splined tapered shaft.

When you put it back together, you might consider adding some lock-tite (or even crazy glue) to the splines (be sure to NOT get any crazy glue in the threads -- but you CAN get lock-tite thread lock in the threads) so that it adds a little shear resistance to the mating splines.

These arms are really long -- and exert quite a bit of torque on that spline -- and some owners have had to replace the transmission due to the splines themselves shearing off (like with an ice-frozen blade in winter -- where the blade/arm does not move, but the torque of the wiper motor shears off the ridges of the splines as the shaft turns).

One trick I use in winter (for the 'winter blades'):

Reduce the blade length by 2" -- so as to reduce the wiper load -- and also increase the pressure per linear inch by the blade against the window. You won't notice the reduce length, as it is halved at each end of the blade.

 

A plumbers faucet handle puller works great and wont leave marks from prying on it. It will cost about $5 at a hardware store.