John Deere 4230 Hydraulics

Josh8906 · Nov 11, 2016

I have a JD 4230 that I purchased not
long ago. When I bought it I changed
all the fluids and filters and cleaned
the hydraulic screen filter. I noticed
after bushhogging for about five hours
the scv and around the rear end seemed
hot. I check the temperature with my
temp gun and it was showing anywhere
from 220 to 240 degrees. Does anybody
know how hot the hydraulic area should
get? It just has me concerned. I don't
want to mess anything up. Thanks for
the help.

Roger in Iowa · Nov 11, 2016

That is too hot! Oil will break down at those temps.

You have a high pressure leak.

Bob · Nov 11, 2016

To add to that, since you have a temp gun, after a cold start check the temperature of the scv(s), steering valve, brake valve, and hitch valve (if it has 3-point) as the tractor warms up. The component that warms up soonest/the most is likely where the high pressure leak is.

Tx Jim · Nov 12, 2016

I agree with Roger that your tractors hyd oil is too hot. General rule of thumb for oil temperature when operating hyd's is ambient temp + 100°

johnyquest69 · Nov 21, 2016

Had this issue recently on a 4430 and it was the steering metering pump check valve that seemed to be causing my problem. I haven't actually checked since to see I my temp is running as high, but I can almost tell from the heat that was being generated off of the components.

John Deere 4230 Hydraulics

Josh8906

Member

Roger in Iowa

Well-known Member

Bob

Well-known Member

Tx Jim

Well-known Member

johnyquest69

Member

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