Re: (ET) Seem to have lost speed 3 on New Idea 150

["Clean Power Supply" <cleanpower att net>]

 Dean,
 Your results tell me that your 1A contactor is not receiving activating 
voltage.Now you'll need to back track and find out why not. 1A Switch is a 
definite possibility.It is one of the small limit switches on your hand 
speed control.The boook should point out which one.
 Sincerely,
 Harold Z.
On December 27, 2010 at 11:40am -0600, you wrote:
>Well I'm finally getting around to test the relays and here are the 
>readings I get with full throttle. FYI - I'm still thinking it may be the 
>second speed that is out since the throttle is near the gate limit in 
>reverse when it changes speed.
>
>1A large studs = 3.8 V
>1A small studs = 0 V
>According to the E16 manual test 1 of missed second speed I should 
>replace the 1A contactor because I don't have 36 V on the small studs but 
>test 2 says when I have 0V, I should replace 1A switch (what and where is 
>this?) .
>
>2A large studs = 200 MV
>2A small studs = 35.8 V
>Again, according to the E16 manual test of missed third speed I should 
>replace the 2A contactor because I don't have 4 V on the large studs.
>
>I'm no electrician so what is this telling me? Could everything be 
>haywire at once or am I misreading the causes of the test values?
>
>Thanx
>Dean
>
>On Dec 23, 2010, at 6:03 AM, RJ Kanary wrote:
>
>> <When engaging the "throttle", the 2AH relay closes (but slower than 
>> the RTN relay). As I go thru the speeds the 2AH never releases. Should 
>> it?>
>>
>>            That is as it should be.If the traction motor is not heavily 
>> loaded, the relay should pick up in First speed.
>>
>> <The way I read the EGT Circuitry manual, 2AH should not engage until 
>> speed 3 is hit.>
>>
>>
>>            Much was lost in the translation from the GE manual to the 
>> NI manual. :(
>>
>>
>>     So, if  2A contactor coil voltage is present, and the return side 
>> of the coil circuit is intact,the only suspect remaining would be an 
>> issue within the contactor itself.If the insulation bushings for the 
>> large studs soften, the contacts can recede enough that the disc hits 
>> the bushings before it can find the contacts. The armature reversing 
>> contactors can also suffer this fate but that will be something to look 
>> forward to in the future.
>>
>>        {As Bill Gunn would counsel, keep those high current connections 
>> clean and tight. Check them annually.}
>>
>> RJ
>>
>>
>> Dean Stuckmann wrote:
>>>
>>> When engaging the "throttle", the 2AH relay closes (but slower than 
>>> the RTN relay). As I go thru the speeds the 2AH never releases. Should 
>>> it? The way I read the EGT Circuitry manual, 2AH should not engage 
>>> until speed 3 is hit.
>>>
>>> I agree, the NI manuals suck, especially when I don't have an 
>>> electrical background.
>>> Dean
>>>
>>>
>>> On Dec 22, 2010, at 8:27 PM, RJ Kanary wrote:
>>>
>>>>           Verify the operation of the 2AH Relay that is the final 
>>>> arbiter when it comes to full armature voltage.No 2AH closure, no 3rd 
>>>> speed, no 3rd speed means no Field Weakening so you lose all the rest 
>>>> of them too.
>>>>
>>>>         BTW the GE diagrams are far easier to follow than the clones 
>>>> used by NI. :)
>>>>
>>>> RJ
>>>>
>>>> Dean Stuckmann wrote:
>>>>>
>>>>> Pretty sure it should have 7 F and 3 R...
>>>>> Maybe its 2nd that dropped instead of 3rd. Just trying to judge it 
>>>>> by how far I have to move the lever to have it change speeds...
>>>>> Thanx
>>>>>
>>>>> On Dec 22, 2010, at 3:37 PM, RJ Kanary wrote:
>>>>>
>>>>>>      The NI service information is available at
>>>>>>
>>>>>> http://www.elec-trak.com/
>>>>>>
>>>>>>
>>>>>>    How many traction motor speeds is this tractor supposed to have 
>>>>>> ? I've never seen any NI tractors here in Western Pennsylvania.
>>>>>>
>>>>>> RJ
>>>>>>
>>>>>>
>>>>>> Dean Stuckmann wrote:
>>>>>>>
>>>>>>> Hi,
>>>>>>> I think I dropped speed 3.
>>>>>>> There are only 2 speeds in reverse as well.
>>>>>>> It will go into the higher speeds (but still seems to skip 3) if 
>>>>>>> the load is small, but its reluctant to go faster when blowing 
>>>>>>> snow.
>>>>>>> Power pulse button does not want to work either.

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