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Turbo45

Turbo45

Joined
Jun 5, 2008
Threads
16
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223
Location
Kamloops
ok I feel like this is something that has probably bin beat to death but here goes.
Why is there a little hole in the windshield wiper motor cover?
there doesnt seem to be anything behind it you would need access to.
its right in the line of fire for rain to get in!
 
Great question. Cant wait to hear what the experts have to say.
 
would it be to let heat escape from wiper motor? reduce rust potential from humid air?
 
It is a vent hole. Without it , moisture can build and we all know what is next.
 
Never really noticed it until now but not all had them apparently. Beige has a plug in it and is on my 1980 45 and red is off my 1977 45 and no hole.
cover1.JPG
cover2.JPG
 
Some opinions from observations. Caution: some may disagree:

The "vent" hole on the early top-mounted wiper motors was intended to be at the bottom of the installed motor-- as evidenced by brand-new unopened motors and looking at the stamped TNK or ASMO lettering facing outward as you would read them. Since years have passed and covers get removed and replaced, some of them very well may be repositioned with the "vent" opening at the top of the motor.

The "vent" would likely operate as a drain for any moisture condensation accumulation within the electric motor section of the unit, and allow for any venting of the motor.

Similarly on the later single motors mounted outside the truck at the base of the windshield, the cover gasket is three-sided and has no bottom section, and the bottom lip of the cover stands proud of the windshield gasket-- allowing for drainage, again from any moisture that may occur inside the cover. It also allows for any venting that could be for the motor. But that doesn't answer the question of the hole smack-dab in the center of the cover, the rubber plugs that sometimes are there, or the covers with no hole in them. The various motors all seem to operate correctly with or without the hole. And, it cannot be for the ground screw that appeared on the inside of the later covers.

So, agreeing with the initial question: why the heck is there a hole drilled into some of the covers? Was it a later correction made by the engineers to deal with an operating issue? If so, why wasn't there a "recall" to dealers to either retrofit the new-style cover or simply drill the hole? Why is the hole in that location, and why do some trucks have a rubber plug there that proves nothing?

Perhaps someone on here who really knows small electric motors can offer an explanation.

Or................was there some devious person on the assembly line with a drill that took out his frustration on random vehicles as they rolled down the line past his/her station?

(Editor's note: please take notice of the previously politically correct "his/her" used above, which arguably might need changed to "her/his/its/theirs/undecided". Apologies in advance for any up-to-the-moment incorrectness. And, should this thread be visited sometime in the future, say the year 2050, please do not blame my offspring for my lack of knowledge of the latest/greatest way of referring to ourselves (or did you change it back to ourselfs), (or as Thomas Jefferson might have written, "hif" or "herf" since they still had not learned how to properly write the letter "s" way back then, and apparently all suffered from the same lisp, or "lifp".))
 
@Bear - a recall in 1984?? The deviant assembly line animal/mineral/vegetable is more likely!
 
PS. I am offended by your future assumptions, offspring is too blunt a word! They are more than just that! Think of the children!!
 
All in jest, my friend--all in jest ! I love my daughter heart and soul.

The wiper cover hole is an interesting question. I realize there was a size increase in the cover when they revised the motor sometime in the 1970s, but that wouldn't have been a "recall". Maybe someone with a greater knowledge of old electric motors will respond with some details and suggestions.
 
Is there a lubrication reason for the hole?
 
Would read in a later chassis and body manual.
If the hole has any function there must be a write down.
My books are all gone with the Red FJ45 Can to the PS-Speicher Museum.
 
Ok! so we fur sure know we dont know fur sure.
I welded it closed but would love to see this keep going until we get to the bottom of this!
 
I drove my 43 thirty four years with the plugged hole in the cover ... never opened it .
Had never seen a garage the first twenty-five years .....have been the hardest. ;)
Pretty sure the hole has no function.

1973125

....picture after 30 years

.Ever seen a vent hole in a small electrical part a relay for example ????
They don´t have.
Inside_of_automotive_relay.png
 
Last edited:
a.greenspan said:
I drove my 43 thirty four years with the plugged hole in the cover ... never opened it .
...pretty sure the hole has no function......
View attachment 1973125

... ever seen a vent hole in a small electrical part a relay for example ????
They don´t have.
Inside_of_automotive_relay.png
Click to expand...

Beg to differ. Worked on machines all over the world, different climates and different altitudes. Relays DO vent.

 
1969FJ said:
Beg to differ. Worked on machines all over the world, different climates and different altitudes. Relays DO vent.

Click to expand...
Copy part of your link:
" Conditions where sealed relays are not vented:
Under special conditions for specific applications, it may be recommended that sealed relays not be vented. Such conditions include (but are not limited to):
 Much less than full rated contact current. Low level contact voltages and/or currents Low ambient temperatures
....operation at low to medium contact loads in a dirty environment (dust, grease, salt air, urban pollution, etc. "

Sorry . ...just an example these relays all have no vents in & they know why...
picture not for the 24V B engine
2861017020.jpg


2861017020_1.jpg

To explain a bit more
The glow blug relay for the B4´s are on the inside of the cabin on the right side on the bulkhead fixed.
One day we came home after a longer trip about 6 weeks & I wanted to start the engine .
You know the noise when moisture meets electric & what happens .... haha
and a hole would let moisture in !
 
Last edited:
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