LT166 Charging Circuit - component location?

   / LT166 Charging Circuit - component location? #1  

661TL

New member
Joined
Oct 13, 2014
Messages
3
Location
Sandusky, Ohio
Tractor
John Deere LT166
I have an LT166 which is not putting out any charge to the battery when it runs. I'd like to check the charging circuit's components, but I am seeing conflicting information on what it uses and where they are located.

According to the PDF Service Manual I bought online, the LT166 does not use a voltage regulator like the LT 133 or 155. It shows a single diode in a single wire from the alternator stator ring leading to the battery. I cannot see this diode, nor do I see the kind of connector they show, which has 2 wires, because it says a second lead from the stator feeds AC directly to the headlights.

What is more confusing is that I initally found many online listings for a voltage regulator with 3 wires specifically meant for the LT166???

Can someone help me sort this out and find the components I need to test? I see a single yellow wire coming from under the flywheel. The Service manual shows it to be a red wire, with the single diode in it??
 
   / LT166 Charging Circuit - component location?
  • Thread Starter
#2  
-cricket.....cricket......cricket......

Turns out the Briggs and Stratton Vanguard Twin 16HP engine can have any one of four different alternator layouts. Some are regulated, some are not. Lots of info here:
www4.briggsandstratton.com/miscpdfs/RNT/alternator_id.pdf
www4.briggsandstratton.com/miscpdfs/RNT/alternator_replacement.pdf
 

Tractor & Equipment Auctions

2012 CATERPILLAR 303.5D CR EXCAVATOR (A52707)
2012 CATERPILLAR...
2016 Ford F350 - Butler Bale Bed - 4WD - 125k Miles (A53473)
2016 Ford F350 -...
BUSH HOG 2615 - 15' BATWING MOWER (A51243)
BUSH HOG 2615 -...
2017 CASE IH 580 QUADTRAC ARTICULATING TRACTOR (A52705)
2017 CASE IH 580...
2024 John Deere 317G Track Loader (A53485)
2024 John Deere...
2016 JOHN DEERE 700K LGP CRAWLER DOZER (A52705)
2016 JOHN DEERE...
 
Top