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Stealth 72v Night Hawk 4x4 problem
Long time lurker, first time poster...
The grandparents have a Stealth Night Hawk. Great batteries, the pack is putting out about 88v. It is a 2011 model with the uprated Mountain motor, with cooling system. When it is put in forward or reverse and the throttle pedal is depressed the corresponding solenoid clicks, but the buggy does not move. I was able to download a 700A Series controller PDF. Unfortunately it has no diagrams so I don't know which is the B+ terminal and which is the M- terminal. :| I know Sunoco is probably the expert on these but emails and facebook posts to him have resulted in no reply yet. Anybody out there have suggestions. I'm open to trailering it to a repair shop in GA FL or AL to have it repaired if I could find one willing. TIA |
Re: Stealth 72v Night Hawk 4x4 problem
The interweb is a great resource if you have time and patience...:?
After about 5 hours of burning up the Google machine I have found: 1. The names of all the terminals on the controller 2. The PDF of instructions from Stealth to test the contactors and the pins on the controller (a previous Sunoco post :thumbup:) I believe what I have is a Star controller. But, I managed to download the pdf of the Curtis controller that appears to be much like the Star. Those 34 pages detail some good test procedures. What I haven't found out is what voltage the MCOR throttle needs to operate correctly. (maybe 15v ?) Next step is to do the testing... well actually the next step is to get it out of the woods. 8) |
Re: Stealth 72v Night Hawk 4x4 problem
OBTW, after reading hundreds of posts about Stealth buggies and knowing there are a lot of owners out there without a great support system, I will post back what I find out and any fixes that work.
I notice a lot of threads with folks that have problems, but they trail off and never post if they got a solution. That doesn't help others on the forum. :cry: So, I'll try to do better with follow-up knowledge. Also, I'm still willing to hand this problem to a good repair facility if any know of one. I didn't plan on becoming a EV technician this week. |
Re: Stealth 72v Night Hawk 4x4 problem
Buggy is now out of the woods and trailered back to the shop.
After an hour of cleaning... found this number: Stealth 72v contriller part number: 60L700NNVSS2 TOYOTA, CATEGORY : STAR. Originally a Toyota fork lift part. I found rebuilt ones available on-line ~$450. There appears to be a Star manual available. :-P Hopefully Grandma's tests OK. |
Re: Stealth 72v Night Hawk 4x4 problem
Hey Purple Frog, just saw this. I don't recall seeing any emails or phone calls from you?
I would be glad to work on your unit if that's what you want to do. If not, you need to go through the testing procedures and narrow down your issue. The throttle is 5k-0 And no this isn't/wasn't a Toyota fork lift part. |
Re: Stealth 72v Night Hawk 4x4 problem
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OK Stealth fans,
We are making progress. First off, when doing tests on the electrics, get all driven wheels off the ground. In our case, all 4. What we did first was clean the cart. Evidently Grandma did some serious offroading on her farm. We couldn't have it in the shop spreading debri far and wide. Into the shop and up on jackstands. Started the tests. It flunked the first one for the line contactor. That is the first solenoid that the Positive (+) battery cable attaches to. It is an Albright Club Car SW80-1275P 48V PO (picture below) Grandma's was manufactured in May of 2013. I found some great test procedures with Google to test it. It had 54v going in on the switch wires, and sounded like it was working, but seriously flunked the ohm test. It was not connecting the 72v circuit at all. For grins, I did an autopsy. The contact plate and points inside looked like moon rocks. Totally fried. If you are wondering why it happened.... the answer: The battery cables had gotten loose. Always not a good thing. Then to add insult to injury Grandpa was using the cart to pull a very heavy load... full throttle. It is hard to explain physics to a 87 year old. Anyway he melted down the posts off two batteries during his little tow. "it was going good until it started smoking...a lot" :lol: I removed all the batteries. Cleaned them up. Tested them. Replace two, and wired them all up with 1 guage wire. Maybe a bit of overkill, but go big or go home. The onboard charger is working great. The battery pack has been sitting at about 88v for the last few days. When the new solenoid arrives we will see what else fried. Or, maybe with some luck the line solenoid frying might have acted like a blown fuse and saved everthing else down stream. Meanwhile, I'll be checking lube, oils, etc. Oh... and figuring out why they disconnected the electric winch. :? Sure would have made it easier to get on the trailer out in the woods, just saying. Stay tuned. |
Re: Stealth 72v Night Hawk 4x4 problem
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Winch wiring repaired, it works great. (Superwinch Terra 25)
OBTW, if you are trying to test your controller using the PDF from Stealth that Sunoco posted a while back, you need to know which terminals are which on the controller. Guys that work everyday just assume everyone knows. See attached diagram. B+ to battery + and to motor armature B- to battery - M1 output to motor field J1 Key switch J2 connect to wire 1 of rheostat J3 connect to wire 2 of rheostat |
Re: Stealth 72v Night Hawk 4x4 problem
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Success!
Buggy is repaired and working great. The line solenoid was all that was needed. Well... all that was needed after a few batteries and numerous cables. Other than a lot of elbow grease and cleaning products. I went ahead and greased things, fixed the winch, adjusted brakes, sanded and painted rusty parts... lots of little maintenance stuff. Now its ready to be loaded on the trailer and taken back to Georgia. My wife has an old 36v Club Car (probably 20 years old). Nice unit, well taken care of, etc. etc. So driving the Stealth is a new experience. :lol: Somebody tore up a bunch of sod on her initial launch. She is used to using a lot of loud pedal to get her old cart launched. The Stealth has a wee bit more torque! The last 4 days has caused me to be a bunch more interested in EV technology and potential. I need to find a totaled Tesla. :wink: |
Re: Stealth 72v Night Hawk 4x4 problem
Glad you got it back going!
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Re: Stealth 72v Night Hawk 4x4 problem
Purple frog,
Speaking for all the other Stealth owners, we appreciate your post. It is nearly impossible to get information on these things. I love mine for hunting. Thanks. |
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