How To: Take Apart the V4 Hot End for Cold Cleaning

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insta
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Re: How To: Take Apart the V4 Hot End for Cold Cleaning

Post by insta » Sun Jan 31, 2016 1:59 am

Huh, OK. The idea was just to soften the plastic barely enough to let you stab it through with an allen wrench, not actually melt it out. Glad it worked though.
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ajmadison
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Re: How To: Take Apart the V4 Hot End for Cold Cleaning

Post by ajmadison » Tue Jul 12, 2016 7:52 pm

Think my V4 hot-end was fried anyway, but I got to the step "Remove the black cloth cover. Take the removable thermistor out of the hot-end and set it aside."

Well, I lightly tugged on each set of wires, and nothing moved. First off, not sure which set of wires are attached to the thermistor, but unless there's a special way of getting it to slide out of the hot-end that I don't know about, I'm going to guess mine was baked into the hot-end somehow and was not going anywhere. Anyway, wanted to ask what I did wrong, and what to look for in the future.

I get the impression that there will be additional extruder jams in my future, so thought I'd ask before I ruin more of these $75 parts.

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Jules
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Re: How To: Take Apart the V4 Hot End for Cold Cleaning

Post by Jules » Tue Jul 12, 2016 8:19 pm

ajmadison wrote: I get the impression that there will be additional extruder jams in my future, so thought I'd ask before I ruin more of these $75 parts.
You haven't ruined the part, but sometimes the thermistor is wedged in there fairly tightly.

This is the thermistor:
thermistor.jpg
You do not actually have to remove the thermistor to take the nozzle off. Or you can try poking it through carefully with a awl from the other side, there is a little hole underneath it.

Just remove the nozzle. :D

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insta
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Re: How To: Take Apart the V4 Hot End for Cold Cleaning

Post by insta » Thu Jul 14, 2016 3:01 am

THE NEWER V4S USE SET SCREWS ON THE THERMISTORS HOLY CRAP DONT JUST YANK THE THING OUT :shock: :shock:
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ajmadison
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Re: How To: Take Apart the V4 Hot End for Cold Cleaning

Post by ajmadison » Thu Jul 14, 2016 3:06 am

Thanks insta.

My eyesight isn't what it once was. I saw the holes, but now I know what's in them. And no worries, no yanking.

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Jules
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Re: How To: Take Apart the V4 Hot End for Cold Cleaning

Post by Jules » Thu Jul 14, 2016 3:22 am

insta wrote:THE NEWER V4S USE SET SCREWS ON THE THERMISTORS HOLY CRAP DONT JUST YANK THE THING OUT :shock: :shock:
Wow.....that's embarrassing! Totally correct and i never noticed it - the one spare hot end that I took off of the Rev.E does have set screws in it! (The older ones don't.)

I need to go update that write-up. There's wedged, and then there's set screws....... :roll:

Great save, insta! :oops:

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