RCCrawler Forums

joemomma95 · 11-18-2007, 06:00 PM

Well, at our last GTG we were trying this almost impossible line, falling off every time and I managed to land on the wheel and strip out the center brass gear on the 5645. I ordered the replacement gear set and replaced the stripped gear. Went out again today for another GTG and everything seemed to work ok for a little while then it seems I lost power on the servo, everything I tried didn't help the problem, and after messing with it for a while I noticed the casing was pretty warm, not warm enough not to touch but noticeably warmer than it's ever ran before. It will hardly turn the wheels sitting on smooth concrete now. Any ideas on what's going on?

Rooster Crawler Edition
45t Integy
TQ2 rx/tx
generic batteries

Kranberry · 11-18-2007, 06:05 PM

good ol` hitec servos

ht servo's tend to not last(with some). i was in the same boat. just bought a tower pro 995 and it was way waaay better then the ht

could even turn better

BGGruff · 11-18-2007, 06:13 PM

Here's my opinion on Hitec servos...

That's just me, that's why I run TowerPro only now.

hitman46mod · 11-18-2007, 06:17 PM

You may have either bent the motor shaft or possibly bent another shaft somewhere in the geartrain in the servo. Sorry man.

666 · 11-18-2007, 06:19 PM

Possibly you have fragments from the stripped gears in there causing it to work harder? Try cleaning it real good and then regreasing?

SACCO · 11-19-2007, 07:49 PM

My hitec 5645 and 5955 got frickin hot with the rooster crawler. So hot you couldnt hold your finger on it for more than a second. Put my MM in with a castle BEC and no superheating or loss of power. Go figure? I sold the rooster crawler but am gonna buy another in December to give it another shot.

Good luck, I know I didnt help you any but just wanted you to know I had the same problem.

CreepyCrawl · 12-06-2007, 08:54 AM

I ran 5645's all season and had serious issues with the gears stripping out. I put them in my super when I built it to keep my costs down a bit, but have found that its worth dropping the extra cabbage for some nice high torque servos. Seems to be high praise for the Tower Hobbies high torques, and the Hobbico CS-170's are identical to Hi Tec 5955TG's Check out JR's new 9100T also.

JohnRobHolmes · 12-06-2007, 09:06 AM

the 5645MGs work well in a 2.2, but they aren't bombproof. I stick to the robot servos and haven't had an issue at all since.

alanpineapple · 01-09-2008, 09:26 PM

i have a hitec 645 mg, running with a rooster crawler and i want more power, i feel the steering very weak.

i have in mind to buy a hitec 5955 but im not shure because i had readed about a lot of heat issues...

i have a 2.2 rig...

please tell me
what do you think about the hitec 5955?
what kind of servo to buy , why and where?
every one talk about tower pro... wich one is the srongest that fit the place of a 645mg???

Thanks a lot, i will wait a little on buying the hitec 5955 servo, first i want to know what the experts think.

JohnRobHolmes · 01-09-2008, 10:08 PM

The 645mg is about the same as the tower pro in strength, and the tower pro is more inefficient. I run my 5955's in 2.2 rigs with no heat issues, but you have to make sure the steering doesn't bind and your epa's are set. If you want more power, the 5955 is the best bet and a dang good servo. I carry them because they are a great product.

yotachump · 01-09-2008, 10:33 PM

Quote:

Originally Posted by alanpineapple

i have a hitec 645 mg, running with a rooster crawler and i want more power, i feel the steering very weak.

i have in mind to buy a hitec 5955 but im not shure because i had readed about a lot of heat issues...

i have a 2.2 rig...

please tell me
what do you think about the hitec 5955?
what kind of servo to buy , why and where?
every one talk about tower pro... wich one is the srongest that fit the place of a 645mg???

Thanks a lot, i will wait a little on buying the hitec 5955 servo, first i want to know what the experts think.

why did you post this twice?
heeeelp Please!!! hitec 5955

alanpineapple · 01-09-2008, 10:41 PM

Quote:

Originally Posted by JohnRobHolmes

The 645mg is about the same as the tower pro in strength, and the tower pro is more inefficient. I run my 5955's in 2.2 rigs with no heat issues, but you have to make sure the steering doesn't bind and your epa's are set. If you want more power, the 5955 is the best bet and a dang good servo. I carry them because they are a great product.

Hi John
I dont have EPA in my radio... do you think this is a big problem?...
i have the 645 and had calibrated it, not to blind the steering, i can do th same with the 5955 or no?

6,300 post!!! you most know what you are talking about!
thanks a lot

alanpineapple · 01-09-2008, 10:43 PM

Quote:

Originally Posted by yotachump

why did you post this twice?
heeeelp Please!!! hitec 5955

just answer in one of them.

JohnRobHolmes · 01-09-2008, 10:45 PM

Post count doesn't always mean smarts, but I do a good bit of electronics testing and such on a daily basis.

If your current servo doesnt bind, then you should have no problems with the 5955 either. Just drop it in.

alanpineapple · 01-09-2008, 10:48 PM

Quote:

Originally Posted by JohnRobHolmes

Post count doesn't always mean smarts, but I do a good bit of electronics testing and such on a daily basis.

If your current servo doesnt bind, then you should have no problems with the 5955 either. Just drop it in.

thanks a lot !!!

alanpineapple · 01-09-2008, 10:55 PM

John...
do you know how much torque the 5995 have at 7.2v ???
but in kg/cm?

again thanks a lot

Alan piña

JohnRobHolmes · 01-09-2008, 11:04 PM

Eerrrrrr, I have never been able to do that conversion proper. It is a lot, probably 20kg/cm or so.

alanpineapple · 01-09-2008, 11:28 PM

Quote:

Originally Posted by JohnRobHolmes

Eerrrrrr, I have never been able to do that conversion proper. It is a lot, probably 20kg/cm or so.

the specs said that is 24 kg/cm at 6v...

with 7.1v i think i will have at least 24 kg/cm... am i wrong?

thanks

yotachump · 01-09-2008, 11:57 PM

Quote:

Originally Posted by alanpineapple

John...
do you know how much torque the 5995 have at 7.2v ???
but in kg/cm?

again thanks a lot

Alan piña

i heard the 5955 has the exact same internals as the 5990, and the 5990 has 416.61 oz. in @ 7.4 volts

Stall Torque: 24.0kg.cm (333.29oz.in) at 6.0V / 30.0kg.cm (416.61oz.in) at 7.4V

Rogue · 01-10-2008, 12:24 AM

Quote:

Originally Posted by JohnRobHolmes

Eerrrrrr, I have never been able to do that conversion proper. It is a lot, probably 20kg/cm or so.

Here's any easy way to do it.
http://www.linengineering.com/flash/Calculator.swf

11-18-2007, 06:00 PM	#1
joemomma95 Rock Crawler Join Date: Dec 2006 Location: Sierra Vista Posts: 672	HS-5645MG problem Well, at our last GTG we were trying this almost impossible line, falling off every time and I managed to land on the wheel and strip out the center brass gear on the 5645. I ordered the replacement gear set and replaced the stripped gear. Went out again today for another GTG and everything seemed to work ok for a little while then it seems I lost power on the servo, everything I tried didn't help the problem, and after messing with it for a while I noticed the casing was pretty warm, not warm enough not to touch but noticeably warmer than it's ever ran before. It will hardly turn the wheels sitting on smooth concrete now. Any ideas on what's going on? Rooster Crawler Edition 45t Integy TQ2 rx/tx generic batteries

01-09-2008, 09:26 PM	#9
alanpineapple Rock Stacker Join Date: Nov 2007 Location: México city Posts: 87	please help me i have a hitec 645 mg, running with a rooster crawler and i want more power, i feel the steering very weak. i have in mind to buy a hitec 5955 but im not shure because i had readed about a lot of heat issues... i have a 2.2 rig... please tell me what do you think about the hitec 5955? what kind of servo to buy , why and where? every one talk about tower pro... wich one is the srongest that fit the place of a 645mg??? Thanks a lot, i will wait a little on buying the hitec 5955 servo, first i want to know what the experts think.

11-18-2007, 06:05 PM	#2
Kranberry RCC Addict Join Date: Aug 2006 Location: ****, SL,UT Posts: 1,610	good ol` hitec servos ht servo's tend to not last(with some). i was in the same boat. just bought a tower pro 995 and it was way waaay better then the ht could even turn better

11-18-2007, 06:13 PM	#3
BGGruff RCC Addict Join Date: Mar 2007 Location: MS Gulf Coast Posts: 1,949	Here's my opinion on Hitec servos... That's just me, that's why I run TowerPro only now.

11-18-2007, 06:17 PM	#4
hitman46mod RCC Addict Join Date: Sep 2007 Location: Westland, MI Posts: 1,508	You may have either bent the motor shaft or possibly bent another shaft somewhere in the geartrain in the servo. Sorry man.

11-18-2007, 06:19 PM	#5
666 MODERHATER™ Join Date: Nov 2005 Location: Colorado Posts: 10,939	Possibly you have fragments from the stripped gears in there causing it to work harder? Try cleaning it real good and then regreasing?

11-19-2007, 07:49 PM	#6
SACCO I wanna be Dave Join Date: Jul 2006 Location: Moscow Mills MO Posts: 2,204	My hitec 5645 and 5955 got frickin hot with the rooster crawler. So hot you couldnt hold your finger on it for more than a second. Put my MM in with a castle BEC and no superheating or loss of power. Go figure? I sold the rooster crawler but am gonna buy another in December to give it another shot. Good luck, I know I didnt help you any but just wanted you to know I had the same problem.

12-06-2007, 08:54 AM	#7
CreepyCrawl I wanna be Dave Join Date: Oct 2006 Location: Centered Posts: 2,082	I ran 5645's all season and had serious issues with the gears stripping out. I put them in my super when I built it to keep my costs down a bit, but have found that its worth dropping the extra cabbage for some nice high torque servos. Seems to be high praise for the Tower Hobbies high torques, and the Hobbico CS-170's are identical to Hi Tec 5955TG's Check out JR's new 9100T also.

12-06-2007, 09:06 AM	#8
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	the 5645MGs work well in a 2.2, but they aren't bombproof. I stick to the robot servos and haven't had an issue at all since.

01-09-2008, 10:08 PM	#10
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	The 645mg is about the same as the tower pro in strength, and the tower pro is more inefficient. I run my 5955's in 2.2 rigs with no heat issues, but you have to make sure the steering doesn't bind and your epa's are set. If you want more power, the 5955 is the best bet and a dang good servo. I carry them because they are a great product.

01-09-2008, 10:45 PM	#14
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Post count doesn't always mean smarts, but I do a good bit of electronics testing and such on a daily basis. If your current servo doesnt bind, then you should have no problems with the 5955 either. Just drop it in.

01-09-2008, 10:55 PM	#16
alanpineapple Rock Stacker Join Date: Nov 2007 Location: México city Posts: 87	John... do you know how much torque the 5995 have at 7.2v ??? but in kg/cm? again thanks a lot Alan piña

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01-09-2008, 11:04 PM	#17
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Eerrrrrr, I have never been able to do that conversion proper. It is a lot, probably 20kg/cm or so.

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Thread: HS-5645MG problem