Loader 2538/2638 loader pressure relief valve

[AEmetalwerx]

Guys,
I have a pretty new 2638 that i plan to test the loaders relief pressure. I think its a tad low. My question is, does anyone know where the relief adjuster/shim stack is? I've checked the service manual and couldn't come up with anything. I figured it would be worth a shot reaching out in there.

Thanks in advance.

 

[duffer]

I seem to remember a post from way back saying something about an adjustment screw/bolt around the hydraulic pump, on the right side of the engine, just behind the radiator. But not 100% sure. I've never seen any adjustment capability on or around the tranny housing.

If/when you find it, please post something here for all of us to find.

Thanx. and Good Luck

 

[duffer]

Just looked in my service manual, and (maybe) found what you're looking for.

Check out page 9-22, figure 9-26. It looks like it might be the adjustment for the flow control valve.

If you're trying to adjust the FEL flow control, I would suspect that would be near or on the joystick assembly for the FEL.

 

[AEmetalwerx]

Just looked in my service manual, and (maybe) found what you're looking for.

Check out page 9-22, figure 9-26. It looks like it might be the adjustment for the flow control valve.

Hmmm,
Ill have to check that out. Thanks!

 

[AEmetalwerx]

Scanned through that whole section. Not seeing anything specific to the loader circuit. All about the 3 point and main pressure circuit. The search continues

 

[duffer]

Had another thought or 2. From previous posts by others, I got the impression that everything is essentially on one circuit. 3 pt, FEL, etc. But I would also think there should be some kind of adjustment to the FEL on the handle set.

I'm not a hydraulic mechanic, but might be worth a look under the handle shroud.

I'd also call a hydraulics shop and ask them, if not your dealer.

 

[AEmetalwerx]

The dealer hasn't been much help at all. I have checked over the valve and haven't seen anything without pulling things apart. The loader should have its own relief port as most due. I ask curious if the 3 point shares the same circuit but the manual seems to read that the 3 point relief adjust the whole pressure circuit (drive and all) witch runs a higher pressure then the loader.

 

[mwayne]

Great question, I would also like to know.

 

[mwayne]

This looks like it, probably is similar for the cabbed tractor as well.

 

[sspenst]

I will have a look when i get some time. i have the 2638 HST CAB. the 3 point is last to get fluid. pump-hydraulic distribution block- loader valve-(my setup)3rd function-then rear remotes - last 3 point. page 176 in the service manual gives diagram......