Standard Flow VS High Flow, Heat generation differences.

Hey guys I have a question about standard flow vs high flow and the heat generation differences of the two.

I have a John Deere 332E with high flow at 38GPM that I have been using for excavation, it was a machine I got at a good deal and didnt need high flow but got it anyway. My issue is when running the machine for a few hours of constant digging and doing 180 degree turns (tight spacing), the hydraulic power goes down. Could this be due to the heat generation of a higher flowing pump? I noticed that on the john deere 332e, the oil cooler is the same size regardless if you are high flow or not.

With a standard flow mechine, I am thinking there won't be as much heat generation due to there being less flow and resulting in less of a loss in hydraulic power.

I am trying to see if I can convert my machine back to a standard flow or increase the cooling capacity. Anyone with some advice would be appreciated.

Thanks.

Your loader arms functions only use your machines standard flow out of the aux pump. The only way high flow would come into play in the application you're describing would be if you accidentally had high flow enabled and it was dead heading against the couplers.

High hyd oil temps can and will reduce power, but 180 degrees while warm wouldn't be considered hot.

Digdeep said:

Your loader arms functions only use your machines standard flow out of the aux pump. The only way high flow would come into play in the application you're describing would be if you accidentally had high flow enabled and it was dead heading against the couplers.

High hyd oil temps can and will reduce power, but 180 degrees while warm wouldn't be considered hot.

Click to expand...

Thanks for your response.

I took a closer look at the way the hydraulic lines are running on my 332E. It looks like there is one hose that goes to a manifold from the highflow hydraulic pump. That manifold has about 10 different lines running to hoses that control the lift, bucket, power tach, ect.

The only lines going from the main hydraulic pump are four 1" hydraulic hoses that control the motors that drive the wheels. (Which I boxed in black in the picture below)

Ive attached a quick drawing of how everything is connected together. If my eyes don't deceive me, it looks like the control valve has the hydraulic tubing for the hydraulic arms and bucket and is being supplied by the highflow pump. Ive circled the hoses in Blue. Those seems to be the only hoses supplying the control valve.

I'm trying to see if the high flow pump might have anything to do with the hydraulics overheating and causing a loss of power after about 2-3 hours of continuous excavation.

Yea it does not matter if it is high flow or not. My guess is you may be starting to see the beginning of a drive failure.

Need a schematic, appears to be a two section gear pump, one section will be for your lift and tilt functions, the other probably combines in when required for the high flow auxiliary. I notice there appears to be a solenoid valve on the rear section with a hose leading toward the rear I think can't tell for sure, might run to the cooler or something?