John deere 310G park brake problems

Jason Harding · Feb 8, 2020

I have had a hell of a time with my 310G s/n to310GX934593 park brake everything works fine on the machine except when the machine is driven for a short distance and park brake is applied then a buzzing sound is heard and is coming from solenoid area below the steering wheel column. I replaced all three solenoid pressure switchs witch are outlined in red but still have buzzing and the buzzing seems to be coming from that area
if I disconnect the X27 solenoid connector the buzzing stops but also turns brake off
it only happens when the machine is warmed up

mg2361 · Feb 9, 2020

It won't hurt the transmission. Based on your machine serial number the transmission serial number associated with that machine there was a Die Cast issue when the control valve was manufactured creating a small restriction in oil flow when in neutral which causes the spool to vibrate causing a buzzing noise. The only fix if you want to spend the money is to by a new control valve assembly (to the tune of $4000

). They purged all the old stock out with the new that does not have that manufacturing issue.

Jason Harding · Feb 9, 2020

Thank you
I was leaning toward something like that but just hoped it was something simple
Im guessing John deere never had a recall for that ?

mg2361 · Feb 9, 2020

Jason Harding said:
Im guessing John deere never had a recall for that ?

Nope.

Jason Harding · Sep 19, 2020

I am having some more problems with my 310g the park brake is not releasing ive checked starting at the switch going to the silonoid and all seems good there
the problem started when a leak formed in a gasket behind the silonoids the leak is repaired but the park break still is not working
the transmission fluid was very low from the leak mentioned I toped it off
im wondering if the break is having a pressure issue
any help would be great
this is the same machine as i first started this thread with

mg2361 · Sep 20, 2020

Jason Harding · Sep 21, 2020

oil level is correct
I swaped the MFWD for the park brake and the park brake worked fine
so how hard of a job will it be to repair the solenoid valve assembly ?

JL Sargent · Sep 22, 2020

Jason Harding said:
so how hard of a job will it be to repair the solenoid valve assembly ?

I believe you simply replace that. Or, you could swap with the diff lock solenoid just above it if you don't use that. I rarely need mine.

mg2361 · Sep 22, 2020

Not difficult at all.

Jason Harding · Sep 27, 2020

I replaced the solenoid assembly and all works great
thank you for the help
it was an easy project

JL Sargent · Sep 27, 2020

Glad that worked out.

Jason Harding · Sep 29, 2020

well crap everything worked fine when I replaced that solenoid assembly when I tested it for about 30 minuets of testing
so today I started a project and about 30minuets in the dang break did the same thing would not work
so I swaped the park break with the MFWD just to finish the job
any other ideas ?

JL Sargent · Sep 29, 2020

So you replaced that solenoid valve for the parking brake. Worked great for 30 minutes and now its stopped working again and you've swapped it with the MFWD solenoid to get the job done? Did you check to see if MFWD still works with the swapped in solenoid? Those solenoids seem to be tough, I just don't see how you could have killed two of them. Wonder if you might have some other problem and it's not really the solenoid causing this parking brake problem. Maybe wiring?

Jason Harding · Sep 29, 2020

ill try and trace some wires
I have had some wiring issuses with this machine
the mwfd did work the other day but i will check it tomorrow as well

mg2361 · Sep 30, 2020

Check under the floor board where the wiring travels over the top right side of the transmission control valve. That has been a point of wear for the harness.

Jason Harding · Oct 25, 2020

finally had some time to work on this machine
I found a bad connection and all works fine now
another issue im having with this machine is the heater is just not heating up as I feel it should so I figured while I have things torn down now might be a good time to check it out
the blower motor works fine as well as the ac it gets cold no problem
any help would be appreciated

mg2361 · Oct 26, 2020

Make sure your heater hoses from the engine to the heater core are not kinked or damaged. Also make sure your heater valve is working allowing hot coolant to get to the heater core. There is also the possibility of a thermostat issue. They had a manufacturing problem with the thermostat and the part number changed. Also there is the possibility an issue with the casting in the head that could cause the thermostat to distort and therefore stick. Check your operating temperature with a heat gun at the thermostat housing when at full operating temp and post what you have.

Jason Harding · Oct 27, 2020

Well I ran the machine yesterday to run some test for the heater issue and still had issues with the MFWD it would not turn off again
so I ran all the voltage test and all seemed ok so I put everything back together and it worked
my problem / issue now is that several weeks ago when I was having park break issues I also noticed a leak that was in the plate that is where the silonodes are so I had one of my guys replace the plate well I noticed it leaking again yesterday so I tore it all down again and before I order another 400.00 plate im just wording what my options are or any suggestions im attaching several pics of what I have going on
the old plate is the black one in the pics

mg2361 · Oct 28, 2020

Did you also install the new hardware with it. The length of the bolts changed with the gasket change.

JL Sargent · Oct 28, 2020

The bolt length changes with the gasket change? You've got to be sh$tin me! LOL.

For what it's worth I made this change myself, same new part # and reused the old bolts.

That's been about 250 hrs ago and no leaks. It looks like you are working from above the floor of the tractor. I find it's much easier to pull the main hyd. pump after lifting the tractor up good and high on stands. Then I sit in one of those stadium chairs and work on the plate. I would also suggest you take a bright light and inspect that plate very carefully for any chips/cracks, etc. Looks like you have it nice and clean.

John deere 310G park brake problems

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