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How to repair and upgrade 620 wiper arm assembly

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The 620 wiper arm assembly has plastic parts that get fragile with time.

 

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It sucks when they get brittle and break.

 

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You go to the junkyard and the junk yard parts are also worn down. WHAT CAN YOU DO? No new parts?!

 

This is the solution! Datsun 510 parts!

 

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These are from a 1970 Datsun 510 and are made out of pot metal.

 

But do they fit? NO! They are shorter.

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So what is it needed to be used on a 620? A spacer!

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SEE! It fits!

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Any questions?

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I got this idea from a 620 in the yard. The previous owner must of done this mod when his wipers broke. But what part did he use? Lucky there was a 510 4 door in the yard. The parts were the same! So now with my research I pass the info down to you to keep your 620's/Datsun's running and alive... REUSE REDUCE RECYCLE!

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Oh have the tables been turned?

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the later model 620's also use the pot metal style pivots. And you still have to use the spacer to make them work, or change all of the linkage and the motor so it all matches. Yes, the motor is different on the later 620's, but i do not know what year the change was made.

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Thanks for the write-up, I did to my truck a couple of years ago and i should have done a write-up then. But I failed.

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Sweet dude, my pal has a 620 and his wipers don't work because of the broken plastic. He's gonna shit when he reads this. Thanks for the write-up.

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Should the washer be nylon? Or a pair of thinner nylon washers? Just so there is a reduction in potential friction from wear on the metal washer?

 

BTW, love this idea. My 610 had one broken one, and I was lucky to find a pair of pivots at the yard.

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Should the washer be nylon? Or a pair of thinner nylon washers? Just so there is a reduction in potential friction from wear on the metal washer?

 

BTW, love this idea. My 610 had one broken one, and I was lucky to find a pair of pivots at the yard.

 

 

A nylon washer would probably be the best to use, but i used a metal one and have had no problems yet. But, the nylon washer idea never even crossed my mind until it was mentioned here. I did grease mine quite well though.

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I forgot to add that one of the metal rods was hitting the drain cowl. Hammer fixed it!

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What all is within that pot metal pivot? My 521 has a lazy wiper arm where I can rotate the arm about 1/4 of the windshield, but the linkage inside the cab doesn't move. I know the arm is engaging on the splines because I can see the shaft move on the outside, just not the inside... It's making it so that the arm doesn't extend it's full reach unless if I want the arm to rest half way on the windshield when not in use...

 

Sorry for bringing this back from the dead...

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^ i need pics to see what is up... Maybe you might need to take off the drain cover and check under there...

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I'm back to this thread again.

 

I was going to repair my busted plastic pivots (one has two ears broken off, the other 2 broken off studs.)

 

But frankly, if I could find some used ones - metal or plastic, I'd go with that to save time.

 

So I'm hearing the following options:

  • 77 620 and later used pot metal.
  • 510 used metal
  • 720 will fit (metal?)  EDIT:  thought someone in this thread said they fit - but it's not this thread(!)!

Are there others?

 

Here near Pittsburgh, there is NOTHING in the junk yards.  So for me to find these parts its going to have to be Classifieds here or eBay. 

________________________

 

As far as repairing the broken ears, I was thinking to hold them in place with Super Glue, then lay the pivot in a flat surface (w/hole) and build a 3/8" tall "moat" 1/4" away from the perimeter of the plastic and then fill with JB Weld.  This would make a big epoxy block around the plastic flange.  I could even cut a steel plate to lay on the top of the epoxy to completely reinforce it

 

Naaaaa.....

 

Studs have to be bolts through the plate so that they hole the whole sandwich together.

 

I really don't want to do this..... (unavailable Banging Head Against Brick Wall emoticon)

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Revival...... how do you remove the pivot (assembly?) If turning the nut makes the stud spin with it????? Damn the luck. Any ideas?

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