How do you take this apart (69 wiper motor hsg)

[Greg L.]

How do you remove this gear and shaft assembly?



Thanks.

Greg Linton
#45455

[Chuck S.]

Re: How do you take this apart (69 wiper motor hsg

Greg, I believe the rectangular end of the shaft shown on the gear side has been peened over in a press...I think you will be asking for trouble to try and remove that gear. Can't you completely degrease the housing, and plate the entire thing?...Won't everything metallic will get plated, but not the gear? Instead of a bearing, the shaft probably has a copper bushing in the housing.

[Greg L.]

Re: How do you take this apart (69 wiper motor hsg

Thanks Chuck but I'm not trying to plate it as the housing is natural aluminum. I just wanted to get it apart to try and restore the aluminum finish and re-grease the bushing. I thought that it should just slide out with the nut off maybe it's more trouble than it's worth to take this piece apart.

[Chuck S.]

Re: How do you take this apart (69 wiper motor hsg

Oh, yeah, duh. I have my old housing on the car temporarily trying to figure out some hose routing...I can take it off tomorrow to confirm what I said about the shaft and gear installation is correct. It seems like it would be easy to take the nut off and try it...no go?

Cleaning the housing is not a problem...just turn the housing with the internals down, and brush the outer surface with dilute phosphoric acid...I use 2 parts water to one part acid. You can use an acid brush to get down into the structural webs.

It should be fairly easy to keep the acid from going to the inside...you'll probably want to keep it away from the shaft and bushing area. You will be able make it look new with the acid...just keep a sharp eye out that it doesn't start to pit on you if you leave the acid on too long.

[Greg L.]

Re: How do you take this apart (69 wiper motor hsg

I'll try cleaning it like you say for now but it would be nice to be able to lube the bushing somehow as it hasn't been lubed since 1969! I heard that there is a clip holding the shaft in place but I can't even get the boot off to see it. Sounds like it will come apart if I work at it though.

[Chuck S.]

Yes...And Here's The Details...

However told you there's a clip was correct...I took mine apart just a minute ago. The boot/cover has lost a little flexibility, but it'll come off and probably be reuseable. Don't be afraid of it...just stick a small screw driver under that ear that protrudes from the boot, and pry it up there and just roll it off. Underneath, you will find a cir-clip with holes in the ends...a pair of cir-clip pliers will be helpful. Behind the cir-clip is a copper thrust washer.

There is no shaft bushing per se...that rubber boot covers a plate about the size of a silver dollar with two semi-circular arc slots cut in it (mine is stamped A for the rib counters). The rubber boot actually fits to the OD of that plate, and the protruding ear in the rubber boot is located at a tab on the OD of that plate.

The arc slots in the plate fit over tabs in the aluminum housing. The plate covers a large hole in the housing about 1" or more in diameter, and the shaft fit hole in the plate is eccentric to the large hole in the housing. The plate is really the shaft support "bushing", and you will find the area between the rubber boot and the plate is packed with grease.

Underneath my plate was a large diameter washer...I assume its thickness was varied to adjust for shaft end-play.

[Chuck S.]

Interesting...

I just looked at your picture again to confirm the rubber boot appears the same as mine, and it does.

The interesting thing is that your housing casting is completely different from the one on my 70; your casting appears to have rounded areas about the mounting locations, where mine is all sharp angles and straight lines. (Yeah, Yeah, Yeah, and No, No, No, to ALL you skeptics...it's the original motor and I have the silver foil date sticker to prove it! Frrruuuuhhhhhpp! :p )