Jacobsen Turfcat Electrical

[luckyrabbit7]

I recently purchased a jacobsen turfcat with Kubota engine. I'm trying to understand the wiring diagram.
I'm not sure of what some of the letters on diagram stand for.
I circled them in red.
Fuel solenoid p g h
Alternator. Ig b l e
Gauge s g I
Connection blocks. M F lBGS

 

[North Idaho Wolfman]

I recently purchased a jacobsen turfcat with Kubota engine. I'm trying to understand the wiring diagram.
I'm not sure of what some of the letters on diagram stand for.
I circled them in red.
Fuel solenoid p g h
Alternator. Ig b l e
Gauge s g I
Connection blocks. M F lBGS View attachment 121657

Fuel solenoid p g h

P = Pull in
H = Hold
G = Ground


Alternator. Ig b l e
Ig = Ignition
b= Battery
l = Light
E = Energize


Gauge s g I

s = signal
G = ground
I = Ignition


Connection blocks. M F
They are connectors

lBGS
Looks like a interconnect / safety relay.

 

[luckyrabbit7]

Fuel solenoid p g h

P = Pull in
H = Hold
G = Ground


Alternator. Ig b l e
Ig = Ignition
b= Battery
l = Light
E = Energize


Gauge s g I

s = signal
G = ground
I = Ignition


Connection blocks. M F
They are connectors

lBGS
Looks like a interconnect / safety relay.

Thanks for the answer. Everything makes sense. I understand how everything is working , except the lBGS.
It makes sense that it is a safety relay.
It is connected to the seat switch .
But I can't seem to figure out how it stops engine from running?

 

[luckyrabbit7]

Also I didn't know where the one line is going to. I circled it in blue

 

[North Idaho Wolfman]

Also I didn't know where the one line is going to. I circled it in blue

Connection blocks. M F
They are connectors
M = Male
F = Female

That blue connection would be an optional connection, like for an add on.

The way the relay works
S and G and B are inputs
L would be the output that feeds back to the switch.
G and B would be the coil
S and L would be the normally open contacts
The seat switch activated keeps the engine running.

 

[luckyrabbit7]

Connection blocks. M F
They are connectors
M = Male
F = Female

That blue connection would be an optional connection, like for an add on.

The way the relay works
S and G and B are inputs
L would be the output that feeds back to the switch.
G and B would be the coil
S and L would be the normally open contacts
The seat switch activated keeps the engine running.

View attachment 121675

Male and female , duh, I'm hitting my
Hand on my forehead!
I get how a relay works and when you
Close the seat contact it energizes the coil and you get a output on l that goes to A.
I don't see a need for a relay
Usually you use a relay for a holding circuit , or one input to control multiple lines, or one voltage to control a larger voltage , or current.
So you don't have arcing in the switch
In this case the seat switch. But the input to the relay is just the same wire as the control signal. If you ran the out put of the seat switch to the A terminal it would be same thing.
I also don't get that you need to be sitting on seat to start it. You sit and get the voltage to the A terminal on the ignition switch. But A doesn't even come into play when starting
It says start is B I S. I'm missing something here. Thanks for taking the time to explain this ,it's appreciated

 

[North Idaho Wolfman]

Male and female , duh, I'm hitting my
Hand on my forehead!
I get how a relay works and when you
Close the seat contact it energizes the coil and you get a output on l that goes to A.
I don't see a need for a relay
Usually you use a relay for a holding circuit , or one input to control multiple lines, or one voltage to control a larger voltage , or current.
So you don't have arcing in the switch
In this case the seat switch. But the input to the relay is just the same wire as the control signal. If you ran the out put of the seat switch to the A terminal it would be same thing.
I also don't get that you need to be sitting on seat to start it. You sit and get the voltage to the A terminal on the ignition switch. But A doesn't even come into play when starting
It says start is B I S. I'm missing something here. Thanks for taking the time to explain this ,it's appreciated

I'm pretty sure it has to do with the operation of the PTO switch.
Normal operation will kill the engine if you get out of the seat with the PTO Engaged.
There just are not very clear to the operation.
I'm betting I have it backwards on the relay and it might energize when leave the seat and thus cut the run signal.
It's hard to tell from their diagram as it doesn't state N.O. or N.C contacts.

 

[North Idaho Wolfman]

Sorry if I replied twice to this. I don't see me first reply. But it went something like :
M and F means male and female, I'm slapping my forehead, duh
I still don't get the relay. I mean I know how a relay works, but when the input and signal wire are the same wire, there is no point. The output of the seat switch could of gone to y on the ignition switch.
I know the seat switch has to be activated to start tractor, but don't see it in diagram. Seat switch goes to y on ignition switch, but y isn't even part of the start . Start is only B I S

Yes you said that in post #21
Read post #22 for my answer to this post and that post.

 

[DustyRusty]

NO, and NC mean Normally Open and Normally Closed, however, we need to define the term. I learned NC and NO mean how the switch is when it is sitting on a shelf with no power attached to it. Is that how Kubota defines NC & NO?

 

[North Idaho Wolfman]

NO, and NC mean Normally Open and Normally Closed, however, we need to define the term. I learned NC and NO mean how the switch is when it is sitting on a shelf with no power attached to it. Is that how Kubota defines NC & NO?

That's all well and good, but this is not a Kubota.

Who knows what Jacobsen considers normal.

 

[JimDeL]

Thanks for the answer. Everything makes sense. I understand how everything is working , except the lBGS.
It makes sense that it is a safety relay.
It is connected to the seat switch .
But I can't seem to figure out how it stops engine from running?

It shuts off the fuel.

 

[luckyrabbit7]

It shuts off the fuel.

Can you explain how it does?

 

[JimDeL]

It activates a solenoid which is connected to a fuel shutoff valve.
I'm not familiar with the Turfcat, but generally there are various safety switches that sense the operator lifting off the seat while the PTO is running, or the throttle/pedal is off its neutral position, and shut the engine off as a safety precaution.