SK135SR-1 Arm Swing Problem

[TKM5890]

A delay function has been added to hold the breaker valve pilot signal for 5 seconds after the front ATT operation using the smart relay function.

The impact of the abrupt movement is eliminated, but the arm and swing movements are slowed down for 5 seconds.
However, when the front ATT is operated, the arm and swing movements accelerate.

Is it possible that the P2 BYPASS CUT spool is broken?

 

[TKM5890]

I sent it while I was in the middle of creating it. Sorry.

I thought that when the pilot signal from the option valve (breaker line) arrives, the timing of the P2 output rises and falls would be jerky, so I added an off-delay timer that allows the pilot pressure to be applied to the option valve for 5 seconds after operation using the smart relay function so that the pilot signal can be received for a while. An off-delay timer has been added so that the pilot pressure is applied for 5 seconds after operation using the smart relay function.

However, the result did not work.

A video of the phenomenon is attached.

IMG_0109.MOV

drive.google.com

IMG_0110.MOV

drive.google.com

P2 pressure
Without attachment operation: 40k
During attachment operation: 110k

What does this mean?

 

[Kobe Steel]

I believe that is the rear pump main pressure reading.

Without attachment operation: 40k (40 bar, 580 psi)
During attachment operation: 110k (110 bar, 1595 psi)

It looks like the pump responds with a higher output flow when the rotator is activated and then speeds up the other functions as well. You may want to consider using the mains pumps PTO section, if it has one and run a separate system. You can mount a PTO and small pump and control valve to run the rotator, and because it is on a separate system it will not cause the issues you are currently having.

Best regards

 

[TKM5890]

The PTO pump is equipped but used for dozer blades.

I am thinking of adjusting the pump regulator to increase the minimum flow rate.
What do you think of this plan?

 

[Kobe Steel]

You could interrupt the Dozer pump supply with a single control valve that has power beyond. You would have up to 50 lpm supply for the rotator at max rpm if using the genuine shimadzu pump fitted by Kobelco.

I don't know if increasing the pumps minimum flow would make a difference but wouldn't do any harm to try, just remember to get a reference before adjusting so it can be taken back to the same position as the manual will not have any reference on setting this flow stop without using a flow meter. 1/4 turns adjust min by 3.3 lpm.