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Something on this might be in the FAQ.
Volvo makes the splines on the wiper shaft quite fine. NEVER turn on the wipers if you have the slightest notion that they are stuck in ice or have to wipe over thick or lumpy ice - they can't take it!
My solutions -
Make sure wiper does not hit wind shield edge during it's sweep
Stage 1 - clean the splines with a wire brush - tighten well. (you may be beyond this stage)
Stage 2 - clean the splines with a wire brush - add a washer under the wiper nut, this pushes it down a bit - tighten well
Stage 3 - clean the splines with a wire brush - wrap about 8 turns of FINE copper wire in a spiral around wiper shaft (this will add some grip and crush)- tighten well.
By now, you will notice that the holes on the old arms have been ground larger than those in new arms - they are shot.
Inspect wiper shafts - if you can clean them so that you can still see sharp splines, you probably do not need to change them, They are much harder than the wiper arm's holes.
Stage 4 - Get new wiper arms - clean the splines with a wire brush - throw washer and wire away - tighten well
Check the nuts every fall.
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'96 855R,'64 PV544 driver, '67 P1800 basket case, '72 Yamaha Rd400, '68 Honda 350-4, '12 XC70, the first 5 are mine, heh, heh, 525,000 miles put on 10 bricks James A Sousa
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