System hyd pressure relief valve for CK30

[dfkrug]

Anyone know where the system pressure relief valve is located for
the Daedong M27 tractors?

My CK30 service manual shows it in a diagram (called a safety valve), but
not where it is located. There is nothing obvious on the gearbox or
three point cylinder housing. I want to lower the pressure to the specced
one (about 2600) on my new Bobcat. I do not have the Bobcat service
manual and I wonder if it is any different from my Kioti manual.

It seems that Kiotis have a relief valve block on some of their tractors as
an option if you do not have a FEL valve. They seem to depend on the
FEL RV to protect the tractor. The AUX valves (an option I have) does not
have its own RV. Interesting.

 

[MichiganIron]

If the tractor has the integral joystick, the system relief valve for the CK30 tractors is on the joystick valve body. It faces the rear, on the right side of the valve body. Be sure to loosen the jamb nut before trying to adjust the relief pressure. When you change the relief pressure on the joystick valve, it effects all the auxiliary hydraulic pressure.

 

[VictorW]

Lowering the relief pressure??? What is it set at now? I wonder why Bobcat would have it higher than Kioti's original design other than to get more lift at the 3pt, fel, and other attachments. Interesting that Bobcat believes the hydraulic system can handle the higher pressure without any failures considering it's the same tractor. Maybe Kioti just likes to stay on the safe side.

 

[dfkrug]

If the tractor has the integral joystick, the system relief valve for the CK30 tractors is on the joystick valve body. It faces the rear, on the right side of the valve body. Be sure to loosen the jamb nut before trying to adjust the relief pressure. When you change the relief pressure on the joystick valve, it effects all the auxiliary hydraulic pressure.

As I mentioned above, it seems that DaeDong has allowed the FEL
valve to provide primary system protection for the tractor. That is
strange...they sure don't do it that way on Deeres or Kubotas. The
"safety valve" in the 3-pt hydraulic system is specced at about 4000psi
(280 kgf/cm2)....I just don't know where it is. The service manual is
unclear.

My Bobcat CT230 arrived this way:
http://www.tractorbynet.com/forums/hydraulics/155427-why-you-have-check-those.html