Losing RPM

[donotfear]

This is a follow up post from the one before about losing the filter screen down into the tank. We still can't get it out, but we are certain that is not the problem.


Zack (person who is helping with this) came out this morning to trouble shoot the problem. Some sort of wire with connector started smoking and melted the connector. See pics below.



Unsure what this is about.

Here is a video of what the tractor is doing.

 

[Clint S]

What is the connector bolted to. Looks like a ground. Were you cranking the tractor alot.

 

[donotfear]

What is the connector bolted to. Looks like a ground. Were you cranking the tractor alot.

He said it was a ground. He was trying to start it. Sometimes it won't engage when started, you have to move into neutral several times.

 

[1010]

The fuel filters need to be changed before anything else. that strainer that dropped isn't the tank isn't hurting anything. You are creating more problems trying to run the machine when you may have dirty filters or even a blocked tank strainer, not the one you dropped inside either.

You have to bleed the air out of the new filters, if they spin on get some clean fuel and fill the filter to the top with fuel. You will need to then open the air bleeder and make sure the air is completely out, or the engine won't start.

What year and model is the machine and how many hours does it have?

 

[Clint S]

Sounds like Zack ran the starter too long and melted the ground. Do as said above and fix the ground and try again. Let the starter rest a little between tries to cool down

 

[1010]

https://parts.mahindrausa.com/CorporateEPC/illustration.aspx

I looked at a max 28 parts list from the link above, it looks like you have a cartridge type filter (number 13 in the diagram), that means you disassemble the cannister and remove the old filter cartridge install the new one and put the canister back together. It appears you have a electric fuel pump also, once you get the cannister back together you can just open the bleeder valve (bolt on top) and just turn on the key (not start) the pump should fill the cartridge with fuel, it'll just start squirting fuel out the bleeder, turn key off and close the bleeder.
Then try to start the machine, it should start right up, it might run ruff for a few seconds then clear up.

If you don't get fuel from the bleeder when you turn on the key, it could be several things, with the burned ground wire it could be a fuse or the electric pump is not getting power or fuel and you have a clogged fuel line or strainer in the tank.
Once you turn on the key you should be able to touch and feel the electric pump to see if it's pumping (vibration) might can hear it too.

As Clint mentioned trying to crank for long periods will only cause more issues $$$$ diesel engines are fairly simple, they only require compression, fuel and air. It won't run with out any one of them.

 

[donotfear]

The tractor is a Mahindra Max 28XL, year 2014.
It has 404 hours on it.

I'm printing off these suggestions to give to Zack. He's doing this for me on the side, so he doesn't have much time. He's working on his certification.

Thanks, I'll pass this on. Or, I can swallow my pride and call my ex guy friend who is a certified diesel mechanic.
Hate to do it.
Rats.

Crazy Tractor Lady

 

[John Fitzgerald]

Did you get the problem fixed?

 

[donotfear]

I broke down and called someone else (who I did not want to )K he came out, I'm changing the air filter. It appears to be the problem. Will install tomorrow.

 

[donotfear]

UPDATE:
Well, he came out (former BF). Diesel mechanic, 40 years. He checked it all out. Opened fuel line, fuel was getting through. Air filter was a mess....very dirty. Replaced air filter today. Filled up with diesel. Ran for 5 min., then started working. Bush-hogged about 10 minutes, no problem. Then started losing RPM again. Was in higher setting, 1st. When I stop, put in neutral, it seems to rev up again. It lost RPM for a total of 5 times, but never idled and died, always revved up again.
So, he said the fuel filter looked clean. I turned it on so he could test to see if fuel was getting through the line. It was. I'm asking him now what the next suggestion is.
I showed him everything you guys have suggested, also.

Crazy Tractor Lady with no experience. :confused2: