Trying to piece a lawn mower back together with a Briggs 12hp.
Model# 281707
Type# 0411-01
The duel lead wire was cut off from the stator but the lug for it is still on the mower. Pig tail 3" ?
Found info that states there is a diode. One wire is to charge the battery and the other is for the lights.
Does anyone know which wire gets the diode ? What size diode do I need ? Would it be for the lights ?
Thanks.
Briggs make around a dozen different alternators and they are all interchangable .
To identify them once fitted briggs colour code both the wires and the plug
So as Star has stated we need to know the colours of the wires.
So you are a friend of Richie ?
As perviously mentioned there can be 1, 2, 3, or 4 wires coming out of the alternator
They can be black, red, yellow or white or ant combination of the afore mentioned colours
Unless we know what the wires are the only place we can tell you to put them is not mentioned in polite company.
IT could be single wire AC onl;y
Single wire diode only
2 wire diode on one the other AC
two wire AC for rectifier
or rectified & regulated
or rectified & regulated with warning light.
#5
Richie F
Did my homework and found the answer to my question.
It's a duel (2) wire stator. No voltage regulator in this system.
One wire is red and the other is black.
The red wire has the diode in it. That wire is used to charge the battery.
The black wire is for the lights only. The wire changes color at the stator connector plug from black to white.
Hope this helps someone.
Bert
John Waters is not a friend on mine.
I know he has a wiring problem, but he should start his own thread on the subject.
#6
StarTech
I 2nd that John Waters should start a separate thread as it piggy backing a current can be confusing.
Those wires colors was what we needed just to make sure you weren't dealing with a larger amperage stator that needs a regulator. As stated the black lead is for the lights only as it is AC. The red lead with the diode is a half-wave rectified DC for battery charging.
The following diode should be fine to use. It is what I am using here.
1N5408G Package / Case: DO-201AD
Vr - Reverse Voltage: 1000 V
If - Forward Current: 3 A
Vf - Forward Voltage: 1 V
Max Surge Current: 200 A
Ir - Reverse Current: 10 uA
Height: 5.3 mm
Length: 9.5 mm
So you're saying this is a good to go part for the Briggs p/n 592831 stator ?
One thing I did do is take an ohm reading for the two coils on the stator to make sure they were not open.
The lighting coil was .5 ohms and the charging coil was 1.4 ohms.
These values were at the stator not probed thru the harness plug.
Someone had cut the harness between plug and stator. Why ? I don't know.
Have a pigtail of about 2 inches at the stator and the plug is non usable, but the main harness plug is not damaged.
When the diode fails, it can just stop working or get hot enough to melt the wires or even pop a hole in the wire .
So at a rough guess this is what has happened & the DPO has cut the section out and just carried on using the mower as the alternator is not needed except to recharge the battery.
If the mower is in good tune you get better than 100 starts from a good mower battery, more than enough to mow the grass then pop the charger on between uses.
There are several customers in my clientele who do just that and even more who jump start of their car because they are too tight to fork out the $ 100 ( aus ) for a new battery .
#13
Richie F
Thank you both for your answers.
#14
Richie F
OK I bit the bullet and bought a used stator from a lawn mower dealer that sells new and used equipment and parts out others.
The charging system is 3 amp for this machine.
The fuse for the charging system is 7.5 amp in it now.
I have seen diagrams that look like the fuse should be 20 amp.
Am I looking to deep into this ?
Thanks.
#15
cpurvis
Posts in this thread have 'live links' in them. Be careful what you click on.
#16
Richie F
OK installed a used good known stator and everything is like new.
Again thanks for everybody's help in this.
StarTech... earlier you posted a diode recommendation. That diode is undersized for this application. The dual circuit alternator uses a 6amp 200PIV diode in the harness as it is intended to charge the battery at 2-4 amps DC. The diode you spec'd is only rated for 3 amps continuous forward current. Something like a Vishay GI752 can handle the required current and is a 6a 200PIV diode.
