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Fly Time
10-29-2007, 06:47 PM
I broke the shaft of my E-Flite Park 400 4200 kv inrunner and need to figure out how to replace it. The only replacement part for this motor that I am able to find is the "rotor assembly w/ shaft", so I assume that is what I will need:

http://www.horizonhobby.com/Products/Default.aspx?ProdID=EFLM1101

This is my first foray into brushless motor repairs, so I was hoping to get a little guidance from WattFlyer folks on this. Is this an easy repair to make, or do I need special tools and/or expertise?

Glacier Girl
10-29-2007, 07:08 PM
Doug,
The back plate on the motor case is green loctited in place. You will need to heat it up to get the back plate off. I used a 40 watt soldering pen on mine to heat it, or if you're careful you could try a heat gun. Heat it up and work the back plate off. It's a tight fit so you need a thin bladed tool to get it started loose.

Once off it's a simple matter of removing the old unit and installing the new one. Just remember to re loctite the back plate back on.

dfalcon
10-29-2007, 07:39 PM
Here's (http://www.maxxprod.com/mpi/tips2.html) a step by step guide with pictures.

Rugar
10-29-2007, 07:51 PM
Here's (http://www.maxxprod.com/mpi/tips2.html) a step by step guide with pictures.
Nice link! Thanks!

Fly Time
10-29-2007, 07:57 PM
Doug,
The back plate on the motor case is green loctited in place. You will need to heat it up to get the back plate off. I used a 40 watt soldering pen on mine to heat it, or if you're careful you could try a heat gun. Heat it up and work the back plate off. It's a tight fit so you need a thin bladed tool to get it started loose.

Once off it's a simple matter of removing the old unit and installing the new one. Just remember to re loctite the back plate back on.

Thanks! Should I use permanent (red) loctite, or the lower strength blue?

Edit: Oops, I just saw you already said "green". That stuff is hard to find!

snolord1
10-31-2007, 06:19 PM
Awsome,i have the same problem with my 400 so this will be good info.thnx all

Angel

Fly Time
11-02-2007, 05:46 PM
I got my motor shaft from Horizon yesterday and got it installed last night. I used a heat gun to heat the motor casing while holding it with pliers by the rear housing cover. I then grabbed the front end of the motor by the motor mount ring with a second pair of pliers and gently pulled. The rear cover came right off as advertised! Replacing the shaft and putting it back together was easy. Thanks everyone for the advice!