Hydrulic level

Good morning
JD 2840
Curious on other people's thoughts.
My 2840 needs it load shaft seals replaced, this spring after snow season, so I am always checking the oil level with the dip stick.
The manual says, pull stick, wipe off, reinsert until handle touches opening of tube, pull out to read level.
???
With that vague of an description, I think as long as the dip stick is wet, I am good to go.
Then the other thought, fill the darn thing up beyond the full mark, and be safe.
Can the hydrulic system have too much oil in it ?
I understand too low is very bad, but can too much be bad also?
Kinda like too much oil in the motor can cause the crank to splash and foam up the oil causing bubbles which in turn ruins bearings?
Any thoughts is appreciated
Thanks

I see a bit more of a detailed description of how to check the transmission/hydraulic oil when I read the manual descriptions of the items printed in the manual after the quick look chart of hour intervals for checks and services, which should answer your questions. The detail description of the check looks like what my 2030 and most others I've checked, call for. There are low and high marks on the dipstick to go by, if you have the right dipstick. HTH



The manual online:
https://techinfo-omview.apps-prod-vpn.us.e06.c01.johndeerecloud.com/omview/oml32582/4

IIRC there are no threads on a 2840 hyd oil dipstick

(quoted from post at 13:26:43 01/23/22)
IIRC there are no threads on a 2840 hyd oil dipstick

Click to expand...

I would agree and their picture doesn't show threads.

Well
The dipstick in my 2840 is a simple push in type, with a reddish orange plastic handle, NO
threads.
So I do everything it says to do.
Just rather frustrating at the half butt discrition/actions they have you do.
I mean, make the dang dip stick shorter, dont have the customer put it at some arbitrary point,
then say ta da, your oil is good.
Like the MASH episode where they defuse a bomb.
Cut the black wire.
Click,
But first cut the red wire!
Doh
,

Thanks for the replys

(quoted from post at 18:28:06 01/23/22) Well
The dipstick in my 2840 is a simple push in type, with a reddish orange plastic handle, NO
threads.
So I do everything it says to do.
Just rather frustrating at the half butt discrition/actions they have you do.
I mean, make the dang dip stick shorter, dont have the customer put it at some arbitrary point,
then say ta da, your oil is good.
Like the MASH episode where they defuse a bomb.
Cut the black wire.
Click,
But first cut the red wire!


Doh
,

Thanks for the replys

Click to expand...

Not what one really wants to see in a manual, but a common thing likely occurred on the thread reference - the writer probably used copy and paste.

My thought is, likely the distance between the low and full marks on the stick somewhat compares to distance between just starting the stick at the end of the tube to the fully seating the dipstick in the tube. If so, do what the manual says as far as the engine running, attachments lowered, etc.. See what the level is with the stick just started in the throat of the tube and again when fully seated in the tube and you will have a reference for the level on the dipstick when fully seated, if you want for future checks. Scribe that level on the stick. Low would be the same distance below the new mark as the current marks are apart. Then you can run the stick fully in and make your checks. Just an idea.

This post was edited by Jim.ME on 01/23/2022 at 03:03 pm.

(quoted from post at 15:28:06 01/23/22) Well
The dipstick in my 2840 is a simple push in type, with a reddish orange plastic handle, NO
threads.
So I do everything it says to do.
Just rather frustrating at the half butt discrition/actions they have you do.
I mean, make the dang dip stick shorter, dont have the customer put it at some arbitrary point,
then say ta da, your oil is good.
Like the MASH episode where they defuse a bomb.
Cut the black wire.
Click,
But first cut the red wire!
Doh
,

Thanks for the replys

Click to expand...

The comment about dipstick threated is for older tractors that have the short vertical dipstick. Your works like any other.

You can add more oil. The volume is stated in the manual, for running large hydraulic cylinder. If you do not find the volume in the 2840 manual, lookup the 3255 manual.

It will be cheaper to get it fixed right now, oil is more ecpensive than the two seals and the utilities ate quick to do.

2840 operators manual states ""13 gallons"" required when changing hyd oil.

I have heard of guys running a gallon overfull in the hydraulics of old John Deeres as a matter of routine, I suppose to prevent it
getting low.

(quoted from post at 08:16:43 01/26/22) I have heard of guys running a gallon overfull in the hydraulics of old John Deeres as a matter of routine, I suppose to prevent it
getting low.

Click to expand...

Although I don't recommend operating a tractor with oil level "over full mark" it was done on JD closed center hyd systems to compensate for leaking trans pump suction tube &/or seals to help control frt pump cavitation