[newell83]

We have a 1983 Newell with pneumatic windshield wipers.  One of the wipers is moving slow and not at times at times.  The other wiper works fine.  Any suggestions regarding repairing it?  We are about to take the assembly out, but am looking for thoughts from anyone who has fixed a similar problem.  We are aware that a replacement of the total assembly is costly, so are hoping we can fix it.

UPDATE: We took wiper motor apart, serviced it and still not working. Purchased a new wiper assembly, installed and all is well. Thank you members for your suggestions!