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Old Apr 19, 2008, 01:22 PM
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nyc, ny
Joined Apr 2004
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repairing a servo hs-81 hitec

Hi,
After a bad crash with my easystar last week the elevetor servo "broke".
What it does is that half a circle turns easily as if there is nothing inside.
I got a new one this week and today after a crash the same thing hapened
with the same servo.
I opened it but seemed complicated to fix it. Is there any guide or something
explaining how the work and potentially a fixing guide for novice users?

The servo is the hitec hs-81

Thanks and sorry for the bad english.
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Old Apr 19, 2008, 01:33 PM
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http://findarticles.com/p/articles/m..._n8892199/pg_1
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Old Apr 19, 2008, 01:40 PM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
13,440 Posts
The usual damage to a servo is some of the teeth stripped from a gear. You can buy replacement gear sets, just do a search on 'gear set hs-81'.

You can buy a metal geared hs-81 which is much stronger.

Alternately, stop crashing
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Old Apr 19, 2008, 02:32 PM
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Letchworth, Great Britain (UK)
Joined Jul 2004
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Replacing the gearset on an HS-81 servo is simple provided you're methodical and note which gear goes where when you're disassembling them.

The metal-gear set can be installed as a replacement for the original plastic gears if you wish. I've done this with most of my HS-81s after I found how fragile the plastic gears are.
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Old Apr 19, 2008, 07:49 PM
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nyc, ny
Joined Apr 2004
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Thanks!
I just disassembled the servo and found the gear with the missing teeth!
I will try to find now replacement gears.
Thanks!
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Old Apr 19, 2008, 09:26 PM
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Indianola Iowa
Joined Jan 2008
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Quote:
Originally Posted by mutron
Thanks!
I just disassembled the servo and found the gear with the missing teeth!
I will try to find now replacement gears.
Thanks!
Hi Mutron

These people got all sorts of gears ;http://www.servocity.com/html/hitec_nylon_gearsets.html

Happy Flights & Soft Landings
Sayers 1 ( Jerry )
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