Throttle Servo

[ran-man]

I need some opinions on the Hi Tec HS-5645MG throttle servo. I had the 645Mg and it was kinda weak on the braking and last Friday it totally quit on me, it's only 3 months old. Any info would be great.

Thanks ,Randy

[zignzag]

My hitec has worked out ok. Is you're throttle/brake linkage set up good and servo lined up and set proper. Have you got your transmitter set up for digital servos if it's the digital one. I think there's an analog and digital version of that servo.

[ran-man]

I have the Futaba 3PL, there is no HRS mode or choice for analog or digital.

[mikec231]

i use an Airtronics 94851 it is 192 oz per in. you can get one around 50 bucks.or,another decent one is a futaba s3305 124 oz per in. about 35 bucks. i have found the brakes work best with the carbon fiber strip mod. mine lock up on demand.

[Mapo76]

Hi, I also have the Hitec HS-5645MG when I start 5th scale. Got the same problem when braking. How I have a 7955TG and now it realle stop. I'm happy whith my servo.

[soundman]

Yeah that servo is no good for brakes. You need a savox servo. Something with lots of torque, and speed.
then do the brake linkage mod.(replace spring with fuel line).

[ran-man]

I was wrong, I thought I had 645 and I looked at it last night and it turned out to be a HS 635 HB which is only 62 oz of torque, not nearly enough for braking.

[zignzag]

oops!, yup the 5645mg digital should be fine with the fuel tube mod or cut the same length as the brake spring or added brake pad. It should work great without those mods too until your pads wear out but those mods will beef up the stopping power. Or just pick another servo with more torque.

[ran-man]

I already did the the fuel line mod on the brakes, now i'm going to order the 5645 servo from Dave's.