Junk servo??

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Trip

Trip

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I tried two batteries, both freshly peaked... The throttle servo is working just fine, but the steering servo (Hitec 5745) isn't working worth a poop.. It never has worked very well, compared to my other one. It has been slow and kind of weak since I installed it. (You can hear me complaining about it in one of my other videos.) So far it has 10 minutes of run time and is now dead..

I bought this used from a member on here. All I did was take it out of the box and plugged it in my rec, It seemed to work without a servo horn, so I said all is well...

Can you guys think of anything that could be causing this?

Trip..
th_NewCamera125.webp
th_NewCamera126.webp
 
That looks bad. Is it heating up on the sides before it stops working. That should be moving way faster then that even before it stops working: 5745MG I'm thinking you have a bad servo motor.
Take the 6 screws out of the bottom of the servo and remove the bottom plate. There is a sticker on the inside of the plate that has the date of origional manufacturing.
My recommendation is to send it to Hitec (Service PDF) and ask them to look at it. Most of the time they will fix it for customer satisfaction unless its been damaged by the user. Worst case they call and tell you it will cost more then to replace and you say forget it. In the mean time buy one from Tom's and then you will have a spare.:)
 
That looks like it's over heating, my baby throttle servos did the same before and if you keep doing that it will burn out. have you checked the steering is free from any stiffness....could be the servo has just overloaded from stress if you've been bashing hard. Slap a Rhino in there, people say they're the same but I'm not so sure. :)
 
I wondering if I should go after the person that sold it to me, I asked him several times if everything worked properly... What do you guys think?
 
Bigger the Better said:
That looks bad. Is it heating up on the sides before it stops working. That should be moving way faster then that even before it stops working: 5745MG I'm thinking you have a bad servo motor.
Take the 6 screws out of the bottom of the servo and remove the bottom plate. There is a sticker on the inside of the plate that has the date of origional manufacturing.
My recommendation is to send it to Hitec (Service PDF) and ask them to look at it. Most of the time they will fix it for customer satisfaction unless its been damaged by the user. Worst case they call and tell you it will cost more then to replace and you say forget it. In the mean time buy one from Tom's and then you will have a spare.:)
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Nope it isn't heating up at all, or at least I can't feel it with my fingers. It doesn't stink either..
 
I am thinking about just getting 2 hitec 805's for 60 bucks. That will give me a combined torque output of 686oz... What do you guys think? I know there are plastic geared, but I would love to have all the torque.. I can't afford 2 5745's or a pair of rhinos...

Trip..
 
I can say my 5745MG is enough steering for me. It's one strong servo. I have a 805BB in the box on my bench but, I have heard bad things about them breaking gears. Even the Baja guy's tried them in the buggy and broke gears. With the big tires, it will break the gears. You better buy a couple gear sets too if you go that route.

My opinion is use one 5745MG.:D

Check out when I start the MT in the video. I twitch the steering. Its pretty fast.
Its at about 135: http://media.putfile.com/DDM-Pipe-Review-High-Res
 
trip... big massive tires are hard to turn...Save up get the rhino gigi 4
it is worth it in the long run....the 805 servo..you will break thr internal gears..
to much stress from the big tires...Slawhammer
 
Here's my take on this.

805's work great, had 1 in my Leopard and MT/MB for a few YEARS Only thing that broke was the servo horn gear during the winter. (cold!!) It is one of the few servos that come with a y harness since it uses up 800mah. It's also analog but has tons of power (343oz!) Plus it's a bigger physical size than the 5745. (I also think a rhino aluminum horn fits on the spline but that does't fix the horn gear breaking). Never heard of the motor smoking or gears stripping.

5745 is a 250oz servo which is higher than the Rhino. Much less expensive than a Rhino too. Hitech owns Multiplex now anyway and you see more in Europe since Multiplex is German based. The Rhino looks like only 200+ oz of torque too. Maybe the pretty red cover makes it hard to resist the buy. :clown:

For the money the 5745 is the way to go in my book, next would be the 805 and get a set of gears as back up or another 805 to help with downtime.

Now to the steering issue. If the EPA's are not adjusted right the servo may try to push past the end point and burn out. Also check to see if the steering is stiff or binding creating more resistance than needed.

Let us know how how it goes.
 
Rhino is 254ox and 0.14sec/60degree. Has a high holding power which makes it appealing, less chance of it giving up if you stall the wheel in a crash. My Rhino has taken a pounding and never let me down :D

But yes the red cover is irresistible! lol
 
Ducky said:
Rhino is 254ox and 0.14sec/60degree. Has a high holding power which makes it appealing, less chance of it giving up if you stall the wheel in a crash. My Rhino has taken a pounding and never let me down :D

But yes the red cover is irresistible! lol
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I must have been looking at another site about the specs. So they are only 4-5 oz apart. In Canada I can pick one up for $70CAD, last year I was able to get them for $55CAD!! The 805's are only $36CAD now so you can see how good the price is. Plus Servo horns are much easier to come by for Hitech's compared to the Multiplex. It's getting better though.
 
Yes ..and for the money tower has the 1/4 servo TS-80 for $29.99
343oz torque@6v.....(Plastic gears)Need to use a Y-harness.......All those servo's are good...5745..805..Rhino digi4
 
Trip said:
I ordered a new one from tom's... Hey BTB how long does he take to ship?
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I got mine in under 5 days from purchase.

Just a little info for ya,

The 805bb is a good high torque analog servo. Plastic gears. Plastic case. Bigger in overall size.
The 5745 is a good high torque digital servo. Metal gears. Metal case. Smaller then the 805 and you need the adapter in the FG servo plate.

The digital servos out perform the analog in this situation due to the holding strength/power.

Why Hitec has not made a metal gear upgrade for the 805bb is beyond my comprehension. They make a metal case upgrade.

The 805bb takes 700ma to run and the 5745mg takes 840ma. With either you need a "Y" connector if using it in an older BEC receiver. With out bypassing the old BEC it will limit your out put to 4.8V.

What type of radio system and rx are you using?
 
Bigger the Better said:
I got mine in under 5 days from purchase.

Just a little info for ya,

The 805bb is a good high torque analog servo. Plastic gears. Plastic case. Bigger in overall size.
The 5745 is a good high torque digital servo. Metal gears. Metal case. Smaller then the 805 and you need the adapter in the FG servo plate.

The digital servos out perform the analog in this situation due to the holding strength/power.

Why Hitec has not made a metal gear upgrade for the 805bb is beyond my comprehension. They make a metal case upgrade.

The 805bb takes 700ma to run and the 5745mg takes 840ma. With either you need a "Y" connector if using it in an older BEC receiver. With out bypassing the old BEC it will limit your out put to 4.8V.

What type of radio system and rx are you using?
Click to expand...

I have had a 5745 for 3 trouble free years! :lol: I killed my 5745 servo when I hit a puddle that was as deep as the windows of my truck... Kind of like a submarine! lol ...I didn't want to buy a new 65 dollar servo, so I bought an alloy servo tray, a 5745, a 645mg and a battery from Large Scale Alloy (a member on this forum) for $125. As it turned out, both servos were junk and the screw holes in the radio tray were stripped out... This is by no means, the fault of Large scale alloy, he checked them and they worked. So he sold them, just like any of us would..

The servos worked when I got them, but I didn't test them properly... I just hooked them to my receiver and the servos moved, so I said, "OK they work, good enough"...

After I installed them in my truck, the steering servo did work, but only for a few minutes.. Like I said, this is not the fault of anyone but myself... I should have checked them over more thoroughly. As a side note, Large Scale Alloy was a great person/company to deal with, shipping was very fast and it came packaged ready to take on a nuclear attack!! Good guys to deal with! This was not his own personal radio gear, but something he had, that he wanted to sell... I am sure he did, just as I did and hooked up a battery to see if the servos worked. They worked, so sell them. I would have done the same thing. Please understand I am not complaining..

OK, now... Today, as I had mentioned, I ordered a new 5745 from Tom's (thanks BTB for the link!) I am going to send in the 1 burnt 5745 (from the puddle) and 1 slow, weak 5745 (from the video posted in this thread) along with my burnt 5955 (also from the puddle) to Hitec, to see if they can be fixed... I am going to need a 5745 for the Mutilator buggy for Meli and I would like to either have one as a spare, or maybe have 2 on my truck...

I skipped the idea of the 805 because of the plastic gears. Like BTB said, it sure would be nice if Hitec would make a metal gear version!!! (Are you listening Hitec?)

As far as my radio gear, I am using an Airtronics Caliber 3ps from 1993 (it's the only radio I trust) and my receiver is a Futaba (brand new design from 2008) with a built in failsafe...

Here is a pic of my controller...
NewCamera135.webp

Trip..
 
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you say it worked without the horn, I've noticed that some horns bottom out on the case when you tighten them up virtually locking it up so if it was rubbing on the case it could have buggered it.
if you're running one steering servo then the Digi 4 is king, actual initial torque is 383ozin with 205ozin holding , the 5745's holding will be in the 160ozin range.
I run dual 5745's in my rampage MT and they're plenty powerful and i ran a single digi4 in my fgbaja which again was more than enough. The digi4 is going in my rampage TT for now til I dual it with 5745's.
For the FGMT I'd think about putting in dual 5745's for way better steering than just the single
 
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