4430 Hydraulic Oil Temp

Howdy, I have a 4430 that seems to be running hot oil temp. I cranked it up today and check temps after about 15 minuets with the valve that goes to brakes and rockshaft running the hottest. All others locations...scv's, rockshaft, and steering valves, running a bit lower temps. I'm not sure what this junction is called on the right hand side of tractor behind battery box, but could it be an issue? TIA!
 
"I'm not sure what this junction is called on the right hand side of tractor behind battery box,"

DEERE calls it a "fitting".


"but could it be an issue?"

Unlikely, as it is a "passive" component. About the only thing that could go wrong there is if some odd metal debris got in there and is restricting oil flow.
 
150 degrees after about 10-15 minutes of idling. 125 on all other components. I changed filter when I got home and then checked for heat buildup. Didn't run it long, but I know it has been running much hotter than that during the day. Although it was around 97 or so here yesterday with a heat index of about 110!
 
Temps were taken late afternoon after running only 10 minutes or so. Running much hotter during heat of day. No heavy load...running a disc mower with this tractor.
 
Sir, You have a high pressure leak to sump . These tractors operate at high pump standby of 2250 psi. Any leak to sump will generate heat. Easiest way to detect where this leak is, is to start tractor cold in morning and leave all hydraulic controls in neutral. Start feeling which casting gets hot first. Pay close attention to SCV's and rockshaft control valves. Listen for hissing, Leak can be in any hydraulic function/control valve on tractor that is supplied oil from hydraulic pump, including steering, brake and differential lock valves. All valves are closed center and should stay cool for quit awhile if normal as there should not be any oil flowing through them when in neutral. Good Luck, DW
 

WTW
I think after operating tractor for 10 minutes with hyd oil @ 150° is a little premature to state hyd's have an internal high pressure leak BUT that's just my opinion and opinions are similar to navels as anyone has 1
 
I'm not familiar with the 4430 but if the fitting in question is located on the high pressure standby portion of the circuit, the elevated temperature over other system components points towards the flow of oil in the system but not necessarily an issue with the fitting per se.

Assuming you weren't cycling any functions, it could by an indicator of a high pressure leak to sump as WTW suggested...




(quoted from post at 12:15:09 06/21/18) Temps were taken late afternoon after running only 10 minutes or so. Running much hotter during heat of day. No heavy load...running a disc mower with this tractor.
 

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