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  #1  
Old 04-17-2014, 09:53 AM
jrob33 jrob33 is offline
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Default (Another) Charging Problem on 149

I rewired the whole tractor - 12ga stranded - leaving only the battery cables since they appeared to be in good condition with good continuity.

I replaced the battery and the s/g turned better than it has in a long time - faster/harder

Initially I noticed the ammeter was indicating a charge and I was very excited; but I am not so smart and had connected the ammeter backwards.

After correctly wiring the ammeter and replacing the battery - still no charge.

So I went to bed last night and thought about verifying the ground on the v/r and polarizing the generator - so this morning I replaced the ground wire and started the tractor.

I then took a jumper from the A terminal on the generator to the Batt terminal on the v/r - I got a small spark as expected but still no charge. I accomplished this several (3 or 4) times but still nothing. Only question - should I leave the jumper for more than a split second or just long enough to get a spark?

Pics attached of the wiring and the insides of the V/R - the points in the v/r move freely by hand - but with the engine running I don't see any movement.

Any suggestions? Replace v/r? It looks good but I don't know how old it is or if it working.

Thanks a ton!
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  #2  
Old 04-17-2014, 11:23 AM
R Bedell R Bedell is offline
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"IF" your harness is correct and wired correctly, did you check here...??... S/G Test
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  #3  
Old 04-17-2014, 11:39 AM
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Alvy Alvy is offline
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Follow Roland's test procedures as stated above and double check to be wired correctly, sounds like you did, just make sure. Check your grounds for clean and tightness.

If s/g passes, read up on adjustments to the v/r itself. It has a normally open and normally closed set of tips inside that one set are adjustable, make sure that the tips are not pitted and corroded. Good luck and keep us posted.
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  #4  
Old 04-17-2014, 02:16 PM
Cubby guy Cubby guy is offline
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Been a lonnnnng while since I worked on a mechanical V/R, but I do seem to sort of very vaguely remember that the contacts on V/R's would sometimes corrode/oxidize so that there was not good continuity, or sometimes would even stick. A very fine points file/relay contact burnish tool may fix that for you.
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  #5  
Old 04-17-2014, 07:28 PM
jrob33 jrob33 is offline
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V/R is bad. Started tractor and ran it at half throttle, grounded the F terminal and BINGO the ammeter pegged at full charge and a resulting drop in RPM due to the load on the engine.

I'm a smarter man...Thanks for the help on this topic. More to come I'm sure.
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  #6  
Old 04-18-2014, 09:18 AM
bschmittling bschmittling is offline
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Quote:
Originally Posted by jrob33 View Post
V/R is bad. Started tractor and ran it at half throttle, grounded the F terminal and BINGO the ammeter pegged at full charge and a resulting drop in RPM due to the load on the engine.

I'm a smarter man...Thanks for the help on this topic. More to come I'm sure.
Verify the ground to the VR is good before you replace it.
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  #7  
Old 04-18-2014, 11:31 PM
jrob33 jrob33 is offline
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Quote:
Originally Posted by bschmittling View Post
Verify the ground to the VR is good before you replace it.
Just before I did this test I replaced the ground on the v/r. One other post said there are adjustments to make on the v/r so I found a delco remy publication on troubleshooting and making adjustments to the v/r....I'm not smart enough to decipher what that meant.

If anyone has any suggestions on adjustments for the v/r I'm all ears. I have bought a new one in the meantime but it hasn't arrived yet so I will try cleaning the contacts but not sure what else to do.
'
Thanks for all the posts. J Rob
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  #8  
Old 04-20-2014, 12:01 PM
jrob33 jrob33 is offline
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Smile Charging Problem Fixed

Turned out it was the V/R.
Bought the new V/R from NAPA and it has 3 terminals on one side and a 4th terminal on the underneath / bottom side.

I initially didn't realize the bottom terminal was the GEN terminal and grounded it. I plugged the Armature wire to the L(oad) terminal, the BAT to the BAT and the F(ield) to the F terminal.

When I connected the battery....sparks.

I did some more reading and realized the terminal on the bottom was the GEN. I also realized that this new v/r grounds to the mounting bracket, so I attached the ground wire to the mounting bracket and ground to bare metal just under the mounting bracket for good contact.

After all wires were connected properly - Charging on the ammeter.

Voltmeter to the Armature on the generator read 13.5 V.

turns out the old v/r was in worse shape than I thought - very happy this is charging now -
Attached Images
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File Type: jpg 102_3382.jpg (24.9 KB, 133 views)
File Type: jpg 102_3385.jpg (13.5 KB, 130 views)
File Type: jpg 102_3388.jpg (10.8 KB, 130 views)
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  #9  
Old 04-20-2014, 06:05 PM
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Alvy Alvy is offline
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Can you share that part number? Is it a VR896?
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  #10  
Old 04-20-2014, 06:46 PM
R Bedell R Bedell is offline
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VR896 is the NAPA Cross Reference for the Cub Cadet V/R.
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