Rayco C140 issue

APSmulching · Jan 4, 2015

ALittleDirtWontHurt said:
I'll have to check that fuel filter sensor. Here's what I've got.....when I bought it I noticed that they had bypassed the water separator and run a line going directly into the primer and into another water separator (in place of where the fuel filter is supposed to be. I was assuming that was a separate issue (and something that needs to be corrected right away!), but now I'll have to look a little closer into it. If already running, the engine will maintain RPMs if they hydraulics cut out with the seatbelt light and otherwise seems to run fine. I did notice however, that the machine will stall out very easily and cut everything immediately (including engine) if it sucks in a bundle of limbs too fast. I don't know if that's normal for this machine or not. On any of my other units that is definitely not the case.

Rayco has the pump turned up all the way (69 gpm @ 6000 psi) you need over 200 hp to pull that pump under load. Some people turn down the pump so it won't stall out the engine. I added a tuner and bumped up my power by 30% so it's a lot better but it will still stall out if you feed it too much.

ALittleDirtWontHurt · Jan 4, 2015

APSmulching said:
Rayco has the pump turned up all the way (69 gpm @ 6000 psi) you need over 200 hp to pull that pump under load. Some people turn down the pump so it won't stall out the engine. I added a tuner and bumped up my power by 30% so it's a lot better but it will still stall out if you feed it too much.

Yea that makes sense. How does that tuner work to get the extra power and how would I go about doing it?

APSmulching · Jan 4, 2015

ALittleDirtWontHurt said:
Yea that makes sense. How does that tuner work to get the extra power and how would I go about doing it?

It's real easy to hook up, it takes about 20 minutes The fuel pump wires go into the tuner and then back out again. Them you have a positive and negative wire to connect. It has three settings, stock, 15%, and 30%. It runs good with it and no problems with heat in the summer.

ALittleDirtWontHurt · Jan 4, 2015

APSmulching said:
It's real easy to hook up, it takes about 20 minutes The fuel pump wires go into the tuner and then back out again. Them you have a positive and negative wire to connect. It has three settings, stock, 15%, and 30%. It runs good with it and no problems with heat in the summer.

Where'd you get it?

APSmulching · Jan 4, 2015

ALittleDirtWontHurt said:
Where'd you get it?

Agricultural diesel solutions, they modified one for this JD 4045H with a stanadyne pump. I'll PM you more info tomorrow.

ALittleDirtWontHurt · Jan 4, 2015

APSmulching said:
Agricultural diesel solutions, they modified one for this JD 4045H with a stanadyne pump. I'll PM you more info tomorrow.

great, thanks!

tonyoz · Jan 4, 2015

APSmulching said:
Agricultural diesel solutions, they modified one for this JD 4045H with a stanadyne pump. I'll PM you more info tomorrow.

PM me too please.

tonyoz · Jan 4, 2015

APSmulching said:
Agricultural diesel solutions, they modified one for this JD 4045H with a stanadyne pump. I'll PM you more info tomorrow.

PM me too please.

tonyoz · Jan 4, 2015

ALittleDirtWontHurt, if someone has been welding the fuel tank weld splatter may have damaged the wire coming off the top of the cutter pump, best to check it right back to the loom. From memory that wire is very near the fuel tank.

tonyoz · Jan 6, 2015

OK fellers, you have put the mockers on me today. My 140 has been playing up like a secondhand brush cutter with all the same problems as you guys have and more. I looked in the window on the Rayco ECU and it's got heaps of moisture in it. Changed the ECU and bugger me all the problems bar one have gone, now I have just got to get it to start. :confused2:

APSmulching · Jan 6, 2015

tonyoz said:
OK fellers, you have put the mockers on me today. My 140 has been playing up like a secondhand brush cutter with all the same problems as you guys have and more. I looked in the window on the Rayco ECU and it's got heaps of moisture in it. Changed the ECU and bugger me all the problems bar one have gone, now I have just got to get it to start. :confused2:

You mean the gray computer next to the battery? Why do you have a spare?

tonyoz · Jan 6, 2015

APSmulching said:
You mean the gray computer next to the battery? Why do you have a spare?

Yep the gray computer. I have 2 spare, one unused. When the machine was new I had what the then dealer said where computer issues so the gray computer was changed several times. The tractor went ok for a year or so then the same problem came back so I got a new computer. While waiting for that to arrive a JD service tech called in and he went over the machine. It was not a computer problem but a poor connection in the CBus wires, repaired it and the machine has gone fine for about 3000hrs until yesterday.

yellowdogsvc · Jan 6, 2015

I am glad you found the problem. Now get back to work!!!

tonyoz · Jan 6, 2015

Ok boss

Thean · Mar 29, 2016

hello all

i need help . i have a rayco c140 and it does not want to start and if we bypass it to start its refs does not want to go up . any ideas what i can do ?

tonyoz · Mar 29, 2016

Ok, run a slave wire off the start switch ( start wire) to the solinoid between the battery and grey PCU. You also may need to use a relay. Another thing to check is the wiring harness that connects all the saftey lockouts including the switches.
The second suggestion is most likley.

Thean · Mar 30, 2016

tonyoz said:
Ok, run a slave wire off the start switch ( start wire) to the solinoid between the battery and grey PCU. You also may need to use a relay. Another thing to check is the wiring harness that connects all the saftey lockouts including the switches.
The second suggestion is most likley.

we first looked at the safety switches and found everything was working. it does start if we use a slave wire but then the refs
does not want to go up

Thean · Mar 30, 2016

Where can i find a diagram or layout of the c140 harness and wiring ?

tonyoz · Mar 31, 2016

If it's still got the Eaton cutter pump, check the plug on the top of the pump. Every now and then mine plays up like yours and it's got a broken wire in the cutout curcuit but the wires change colours so often it's imposable to find. All I do is jiggle the harness until it starts then tie it into a position until next time, Been like it for years. A wiring diagram is not much help as it is very inaccrute and doesn't show all the wiring.