Because you only need two types of oil. Motor oil and transmisdion/gear oil.Why does JD recommend this low viscosity HyGuard when most of the rest of the world puts heavy gear lube in rear ends and other kinds of gear boxes?
Thank you for the reply! Yes I do have the service manual. But I was not aware of the front axle vents.
Do you know where I can locate the vents?
Why does JD recommend this low viscosity HyGuard when most of the rest of the world puts heavy gear lube in rear ends and other kinds of gear boxes?
Now I wonder if my breather is clogged.Most tractors have the hydraulic system and the transmission/rear axle combined in the same case/compartment, so that is the spec. You do need to use "Hydraulic/Tractor" fluid in them not plain hydraulic fluid. Hydraulic fluid is for hydraulic systems only. Most tractors spec their own fluid such as JD's Hy-Gard. I use the premium universal Hydraulic/Tractor fluid, it meets the spec.
My JD's do spec GL5 gear oil for the front axle.
Yes good find! Thank you for your help! I didn't know I had a breather. No need to buy one of the after market breather.The 4700 appears to have a vent in the front axle, #SU52604. Also, my JD's call for GL5 gear oil for the front axle, not HY-Gard.
John Deere Front Differential Breather - SU52604
Thanks for helping me find the breather!nisaacs
Good find.
See the breather just inside of the dip stick.
Key #42
That has worked for me on my 4600 as well.Do you have the service tech manual for your 4700? Do a search on TBN, as there have (over the years) been threads addressing the seals in these Deere models.
One help, if not too late, is to loosen the filler plug so the front axle vents some pressure caused when the fluid heats and expands. That solved some leakage in my 4300 and has stopped. Still full of oil too.