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Old 08-09-2011, 03:26 PM   #1
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Default Shortening wire / gear replacement on Savox 1251 / Disassembly?

Hi, I'm trying to shorten the wire on a Savox 1251. I got as far as top and bottom covers off (duh), the two motor mounting screws on top removed, but the output gear seems to be stuck pretty good on the pot shaft.

I have to pull the pcb out from the bottom because the wire goes into the guts and the pins come out on the pcb from the inside face.

I don't have a camera at the moment or I would have posted a picture, but I don't think its necessary.

I don't want to break anything so I thought i'd ask first before forcing anything out.

I think this would be helpful for someone changing gears too, hence the title.

Thanks in advance.
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Old 08-09-2011, 03:55 PM   #2
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Hi, I'm trying to shorten the wire on a Savox 1251. I got as far as top and bottom covers off (duh), the two motor mounting screws on top removed, but the output gear seems to be stuck pretty good on the pot shaft.

I have to pull the pcb out from the bottom because the wire goes into the guts and the pins come out on the pcb from the inside face.

I don't have a camera at the moment or I would have posted a picture, but I don't think its necessary.

I don't want to break anything so I thought i'd ask first before forcing anything out.

I think this would be helpful for someone changing gears too, hence the title.

Thanks in advance.
First do not pull or force, instead of shortening from inside if you are not sure, why not try the outside route, cut the 3 wires at a different height and match it with the other side after taking the right size of wire, solder each one and put either a single thin heatshrink on each cable or a longer one that covers the 3 solders.
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Old 08-09-2011, 03:58 PM   #3
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First do not pull or force, instead of shortening from inside if you are not sure, why not try the outside route, cut the 3 wires at a different height and match it with the other side after taking the right size of wire, solder each one and put either a single thin heatshrink on each cable or a longer one that covers the 3 solders.
Thanks! I thought about that but wondered if anyone had a better way. I'll just do it that way then

How does the output gear come off then? In the case of a stripped set...
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Old 08-09-2011, 04:03 PM   #4
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Thanks! I thought about that but wondered if anyone had a better way. I'll just do it that way then

How does the output gear come off then? In the case of a stripped set...
I usually pull gently with a flat screw driver around all sides of gear making sure that it moves evenly around, then you have the shaft (under inside gear) you need to push it in as you lift the servo body, otherwise you might damage the pod under.

hope this is clear
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Old 08-09-2011, 04:09 PM   #5
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I usually pull gently with a flat screw driver around all sides of gear making sure that it moves evenly around, then you have the shaft (under inside gear) you need to push it in as you lift the servo body, otherwise you might damage the pod under.

hope this is clear
So the output gear is just seated tight on the shaft, but not that its tightened by a screw or something right?
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Old 08-09-2011, 04:11 PM   #6
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So the output gear is just seated tight on the shaft, but not that its tightened by a screw or something right?
right, I have never seen a screw or other device holding the gear on shaft
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Old 08-09-2011, 04:33 PM   #7
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Ok I have shortened it now, just cut off the original, desolder the remaining wire out and soldered new tail from above.

Thanks
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Old 08-09-2011, 04:35 PM   #8
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right, I have never seen a screw or other device holding the gear on shaft
Yeah. I shortened a 1251mg. The output gear took some force to get off. And it was a royal pain getting the snipped wires through the board. But with some patience and expletives, I got it apart, desoldered, soldered, and back together. It's still working just fine meow.

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Old 08-09-2011, 04:36 PM   #9
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you are welcome
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Old 08-09-2011, 06:04 PM   #10
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Default wire shortening

I went the other route and crimped on a new connector. I bought a decent crimper and terminal ends from servocity. That way i did not have to solder the board. It had a bunch of servos to do. The key is a good crimper.
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