Agriculture and Farm Equipment

Agriculture and Farm Equipment Repair Questions? Ask a Mechanic.

Ask an Expert,
Get an Answer ASAP!

Agriculture and Farm Equipment

McCormick MC 100. PTO will not come on with implement

Customer Question
McCormick MC 100. PTO...
McCormick MC 100. PTO will not come on with implement attached, will come on with no implement attached. PTO solinoid reads 10.7 ohms. Voltage at the solinoid wires are about 5.9 volts (with no-implement-PTO turning). No PTO controller error codes. All service manual PTO controller checks made with only one failure--that is seat switch power wire does read to ground when key is off, as does the entire switched power circuit.
Submitted: 2 years ago.Category: Agriculture and Farm Equipment
Show More
Show Less
Ask Your Own Agriculture and Farm Equipment Question
Answered in 15 hours by:
11/4/2015
Mechanic: Curtis B., Technician replied 2 years ago
Curtis B.
Curtis B., Technician
Category: Agriculture and Farm Equipment
Satisfied Customers: 29,476
Experience: Technican turned service manager on multiple lines of equipment and rental equipment.
Verified

I don't have manual, but in my little pea brain, the pto solenoid has to have battery voltage to work correctly./??? Is there a relay between the switch and the solenoid?

Ask Your Own Agriculture and Farm Equipment Question
Customer reply replied 2 years ago
Hello, The solenoid is 12 V no doubt, though not marked. Power comes through "switched power supply", fuse #35, wiring, connectors, wiring, then a "PTO controller" (computer or PLC), then wiring and one connector to the solenoid. I do not know what the PTO controller does internally. All wires and connectors check out with less than 1 Ohm using a Fluke 85. The solenoid does read the right Ohms at 10.7. I do have a "service manual" though no service bulletin updates. I notice that the parts have been updated to "coil attached to valve plunger" --- at $461. A little high to just change parts as a diagnosis. As you might know, this McCormick tractor is just like Case/IH Maxxum before the New Holland buyout of Case/IH. I am by now pretty expert on the service manual-the answer is not there. Unless you have specific experience on this problem, you should try to switch me out to some one who does.
EAMassey
Customer reply replied 2 years ago
Looks like I have to give you a rating to send this message. There should be a rating of "incomplete" or something. I'll give an OK rating --but it should be really "too early to tell".
Mechanic: Curtis B., Technician replied 2 years ago

Do you have battery voltage to the fuse? With only 5.9 volts to the solenoid valve, it is not going to work with any pressure on it . I can opt out if you like, but I see question has gone unanswered for a while! You have to get 12 volts to the solenoid, and for test you could run battery voltage direct to the solenoid to see if it will engage.

Ask Your Own Agriculture and Farm Equipment Question
Customer reply replied 2 years ago
Hello, Yes, I don't know how the solenoid can fail to get voltage pulldown, but your suggestion is a valid test. If the direct wire up does not work, then the solenoid is bad--replace. If the direct wire up does work, then wiring, connector, or PTO controller is bad (somehow).
Customer reply replied 2 years ago
I didn't answer you question--- yes, fuse voltage is 13+ V at the same time 5.9 V at the solenoid.
Mechanic: Curtis B., Technician replied 2 years ago

Seems like there is voltage loss before the solenoid. Relay?

Ask Your Own Agriculture and Farm Equipment Question
Customer reply replied 2 years ago
No relay. Though I have no information about the contents of the "PTO controller" , I believe it to have a solid state switch doing the function of a conventional relay. Also, if I disconnect the solenoid wire from the solenoid, the PTO Controller errors out and won't send any voltage at all. Error=open circuit to solenoid. The connectors look clean. Any comments from previous experience on sources of voltage pull=down.
Mechanic: Curtis B., Technician replied 2 years ago

You say solenoid ohms properly, so it does not seem solenoid coil pulling too much voltage.

Ask Your Own Agriculture and Farm Equipment Question
Mechanic: Curtis B., Technician replied 2 years ago

How does solenoid ground?Through second wire back to controller?Or to tractor frame?

Ask Your Own Agriculture and Farm Equipment Question
Customer reply replied 2 years ago
Solenoid grounds through a second wire back to the PTO Controller. I have now run the direct wires to the solinoid tests. The results are: (1) The direct will start the PTO without load, (2) with direct wires, still no magnet effect to screwdriver, and (3) PTO will not start with a PTO shaft attached. Therefore, my conclusion is that solenoid is bad and circuit is good. My intent is to order solenoid. Please make one last reply and confirm whether you think this is logical.
Comment: Even though you were not the specific expert I had in mind, a fellow with some experience and some sense can always add --- and often that addition is enough to make the difference. Thanks.
Mechanic: Curtis B., Technician replied 2 years ago

I agree , but before I ordered the new one, I would take out the solenoid valve and see if there is anything obvious that would cause problem.

Ask Your Own Agriculture and Farm Equipment Question
Ask Curtis B. Your Own Question
Curtis B.
Curtis B.
Curtis B., Technician
Category: Agriculture and Farm Equipment
Satisfied Customers: 29,476
29,476 Satisfied Customers
Experience: Technican turned service manager on multiple lines of equipment and rental equipment.

Curtis B. is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Curtis B.

Curtis B.

Technician

29,476 satisfied customers

Technican turned service manager on multiple lines of equipment and rental equipment.

Wayne

Wayne

Journeyman

1,148 satisfied customers

34 + years as a mechanic

dieseldan55

dieseldan55

Mechanic

42 satisfied customers

Road mechanic for Volvo Construction Equipment.

Cat Man

Cat Man

Cat Engine Expert

35 satisfied customers

I am ASE Master Certified.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

22 satisfied customers

16 years of experience

JBFixxer

JBFixxer

Mechanic

20 satisfied customers

16+ years experience, hydraulics,hydrostatics, engines, fuel injection systems. And everything in between.

spankyjr1

spankyjr1

Journeyman

310 satisfied customers

I worked on all types semis,forklifts,farm,fire,ect.

< Previous | Next >

Related Agriculture and Farm Equipment Questions
We have a Gator 4x2 with a Kawasaki 10hp engine. It is s/n
We have a Gator 4x2 with a Kawasaki 10hp engine. It is s/n w004x2x61991. We are having two problems with it. First it is had to shift from drive to reveres. Second thing is it is popping out of gear. … read more
Curtis B.
Curtis B.
Technician
29,476 satisfied customers
I have a JD 5510 with a cab. I started it up this weekend
I have a JD 5510 with a cab. I started it up this weekend and it starts just fine. The issue is that the dash and all the head lights and emergency flashers do not work when they are turned on. Howeve… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
Which way does the flywheel turn on a 1993 m4030su. Not
Which way does the flywheel turn on a 1993 m4030su … read more
Curtis B.
Curtis B.
Technician
29,476 satisfied customers
Want to install ATU200 and 2600 display in a JD8960 4wd...
want to install ATU200 and 2600 display in a JD8960 4wd... have power trip also ... figuring to take the power strip to the auxillary outlet wiring, removing the auxillary outlet (don't need a cigaret… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
Reference to a JD 7430 with a JD 741 loader. How do you
Reference to a JD 7430 with a JD 741 loader. How do you remove the inside rh side panel?. This is to access and replace the joy stick. … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
Will case HD 380 pull the deere 510 disc/ripper 5. How many
will case HD 380 pull the john deere 510 disc/ripper 5 shank … read more
Curtis B.
Curtis B.
Technician
29,476 satisfied customers
1529 fuel tank. 1529 engine serial 20526 engine 20526. Has
yes has link some where at bottom of tank , I can not find a way to get at it. … read more
Curtis B.
Curtis B.
Technician
29,476 satisfied customers
I have a lawn tractor model YTH2454 that I got 5-6 years
I have a lawn tractor model YTH2454 that I got 5-6 years ago. Each winter I mount a plow blade on it to remove snow. This year, the tractor would not start. The temperature was unusually low, so I tho… read more
Curtis B.
Curtis B.
Technician
29,476 satisfied customers
My tractor doesent move. I put it in forward or reverse
My tractor doesent move. I put it in forward or reverse starts moving then stops and dies. Cleaned the switches below steering wheel, pulled all fuses, all good, switch on seat seems to be working. He… read more
Curtis B.
Curtis B.
Technician
29,476 satisfied customers
I have an old western 6 pin plow, the up and down works fine
I have an old western 6 pin plow, the up and down works fine but in the angle right position when I try angle left the blade goes up and then falls back down so blade is stuck in right angle position … read more
Curtis B.
Curtis B.
Technician
29,476 satisfied customers
2305 Deere won't start. Battery is good. Key turned to start
2305 John Deere won't start. Battery is good. Key turned to start produces a click sound on the left (likley fuel solnoid. dash lights on . Motor does not turn over. … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
1,148 satisfied customers
M1032 snow blower goes forward good, won,t go in revers.
m1032 snow blower goes forward good, won,t go in revers … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
WHAT IS TORQ GUARD ON A 6430 MODEL? 6430. I JUST DON'T
WHAT IS TORQ GUARD ON A 6430 MODEL? JA: What is the complete model and serial number of your machine? Customer: 6430 JA: Are you fixing this yourself? What have you tried so far? Customer: I JUST DON'… read more
Curtis B.
Curtis B.
Technician
29,476 satisfied customers
I have a 2006 JD 4120 Tractor with the E Hydro Trans, I was
Hi I have a 2006 JD 4120 Tractor with the E Hydro Trans, I was traveling to the neighbors place towing a Hay trailer was in the 3 rd gear range and the speed was aprox, 12 and a half MPH when the trac… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
I have a JD 5055D it stopped and won't restart or turnover.
I have a JD 5055D it stopped and won't restart or turnover … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
1,148 satisfied customers
Cat Man, I have a C16 S/N BFM02139 I am getting a code of an
Cat Man, I have a C16 S/N BFM02139 I am getting a code of an SPN 651 FMI 11, I cant get this code to give me a description, and it is on a industrial haygrinder which is 24 volt system didn't know if … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
Is there a difference between refurbished injectors and new
Is there a difference between refurbished injectors and new injectors … read more
don
don
fleet superintendent
Vocational, Technical or Trade Scho
12 satisfied customers
I have a customer with a JD400 & the main hydraulic pump is
I have a customer with a JD400 & the main hydraulic pump is starving for oil.Any sujestions? … read more
Curtis B.
Curtis B.
Technician
29,476 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x