Green Tractor Talk banner

1 - 17 of 17 Posts

·
Registered
Joined
·
112 Posts
Discussion Starter #1 (Edited)
Did water pump, oil pump and governor. Cam is already steel.

Now I have no spark and green led is not on.
PTO off, seat switch jumped (has power), brake safety works. It will not crank unless pressed in. All connectors hooked up.

I followed manual. I have NO power to purple PTO wire at plug in. Where do I go from here. Was trying to figure relays out. But ran out of time

Any help would be great, this is my first complicated mower. I am use to older mowers and computer controlled cars.

Tks
 

·
Registered
Joined
·
36 Posts
it's been a while since i've worked on one
but if i recall, there could be issues with that circuit board
with the relays on it. i'm not sure if they will pull off
to switch them around to test.
i do think i remember that module was sold combined with
the key switch, and can be prone to failure
 

·
Registered
Joined
·
814 Posts
Did water pump, oil pump and governor. Cam is already steel.

Now I have no spark and green led is not on.
PTO off, seat switch jumped (has power), brake safety works. It will not crank unless pressed in. All connectors hooked up.

I followed manual. I have NO power to purple PTO wire at plug in. Where do I go from here. Was trying to figure relays out. But ran out of time

Any help would be great, this is my first complicated mower. I am use to older mowers and computer controlled cars.

Tks
What do you mean "It will not crank unless pressed in", You said did water pump, check electrical down by starter, those are fuse-able links, they can break. Any other electrical connection that where disturbed?
 

·
Registered
Joined
·
112 Posts
Discussion Starter #4 (Edited)
The brake pedal has to be pressed down for starter to work. So I take it the brake safety switch is good.
I will trace fuseable links from starter
But they were not touched. Though the battery cable runs directly to that same post I think. Maybe something happened tapping cover back on. So who knows.

Good idea.
 

·
Registered
Joined
·
814 Posts
Yes, the fuse-able links and the positive battery cable all connect at the same point on starter. Double check battery posts and battery cables for corrosion.
 

·
Registered
Joined
·
112 Posts
Discussion Starter #6
Ok. Traced wires. Fuseable links good at fuse box/relays/board.

Ignition switch working.
12 volts at coils.
Pulse coil ohmed within specs.
I have another connector jumped under seat. No power key off, on, PTO pulled. What’s it go to? Tried to find on schematic these color wire connector. Will look again.

Is the primary coils shut off by shutting ground or removing battery voltage? No spark even key shut off.
 

·
Registered
Joined
·
814 Posts
Ok, what is the serial #, there are 3 schematics for the 445, one for under 31,361, one for 31,362-70000, 70001 +, there are changes in wiring and key switch/ignition interlock board components (located in right hand side of pedestal) and design. So, I want to be looking at the right one.

If everything is right when you turn key the green LED on the board should turn on, also the fuel pump should turn on, and the fuel shutoff solenoid should snap open, dash should come on driven by EFI/Engine computer in left hand side of pedestal.

Main check is the area for the key switch/ignition safety interlock board, once you get a green LED to light, then you move to the ignition section, if it cranks, but does not start.
 

·
Registered
Joined
·
3,333 Posts
I'm not familiar with this model.

Many models have a safety interlock tied in with the PTO does the 445? If so do you know if it kills the machine or just the PTO? For instance the X585 which is just a couple years newer than your 445 will kick out the PTO if you back up. I had a failure of the switch on the reverse foot pedal. It thought that I was open all the time when it should only be open when backing. In my case the tractor ran fine, I just couldn't activate the PTO until I found it. I don't think they would kill the machine if you tried to back up with the PTO on so that might not be it, however the PTO switch is normally part of the interlock which is why I bring it up.

I am not sure what you are saying here.

I have another connector jumped under seat. No power key off, on, PTO pulled. What’s it go to?
I get that the seat is jumpered. That is a good thing to try because on my X585 if I get off the seat without the parking brake set it shuts down the engine. What does your PTO switch look like. I know on my fathers older 317 it was a toggle switch. My X585 is a big switch with a bunch of wires some of them tie into the safety interlock as I mentioned. It is possible you have a bad PTO switch. If I could see a wiring schematic I might be able to tell you what to jumper or at least what pins to test with an ohm meter to see if the switch has failed. You did mention the engine cranks based on the parking brake so I would tend to agree that this switch is fine.

Without a schematic we are kind of grasping at straws.
 

·
Registered
Joined
·
112 Posts
Discussion Starter #12 (Edited)
Ment to add this. I see no button like the LTs you have to push in to back up.

The manual I have shows serial number break is - 70000 and 70000+ when looking at manual. You said something about 3. Per radiator 2000 it is past 70000. The serial number tag is gone.
Blue jumper seat switch.
Other has a blue and orange wire.
 

Attachments

·
Registered
Joined
·
112 Posts
Discussion Starter #13
If everything is working correctly What triggers coil to fire?
Does it open ground? Shut voltage off at coil ?
 

·
Registered
Joined
·
814 Posts
Check the key switch/ignition safety lock board. It has one red LED and one green LED two blue fuses each 15 amps. Does it have 3 relays or 2 relays (plastic rectangle boxes on the board) That helps id it even more.
 
1 - 17 of 17 Posts
Top