PC60-7 SUDDEN STOP AFTER SWING

[Luchojry]

Good day
It may be a good idea to check what pressure if the valves have been adjusted, if the valves have not been disturbed you may have an issue with the parking brake drain.
As I interpret the post to mean this issue arrived when the motor became loose or is this the cause?
Kind regards
Uffex

Hello, Uffex! I think the motor became loose because of this issue. Because it brings so much stress in the pinion and ring gear.

 

[LACHAU]

Good day, Lachau! Can you help me identify where is the safety valve with suction? And how to carefully adjust it? Thank you

OMG!!!!!
That is swing motor type which's installed to PC60-5 or PC-6 not for PC60-7!!!
PC60-7===>Swing motor is LMF40AB-2.
PC60-6===>swing motor is KMF40AB-2.
PC60-5===> swing motor is KMF40DL.
Note that the KMF40 series can also be installed on PC60-7.

 

[LACHAU]

Funny question.
The figure below is a verbatim quote from the Komatsu repair manual, but there is an errors!
Please point out the mistake.

 

[Luchojry]

OMG!!!!!
That is swing motor type which's installed to PC60-5 or PC-6 not for PC60-7!!!
PC60-7===>Swing motor is LMF40AB-2.
PC60-6===>swing motor is KMF40AB-2.
PC60-5===> swing motor is KMF40DL.
Note that the KMF40 series can also be installed on PC60-7.

OMG. But this swing motor is okay with pc60-7 right? @LACHAU .

 

[Luchojry]

Can you teach me how to adjust the safety valve? How many turns or small turn clockwise or counterclockwise. Thank you

 

[LACHAU]

@Luchojry:
You should try to turning counter-clockwise little by little. Pay attention to adjust both sides.
Just adjust and try to see if stopping the swing operation is effective or not.
If you don't see any effect then you have to disassembly those valves to check, it may be stuck, clogged.

 

[Luchojry]

@Luchojry:
You should try to turning counter-clockwise little by little. Pay attention to adjust both sides.
Just adjust and try to see if stopping the swing operation is effective or not.
If you don't see any effect then you have to disassembly those valves to check, it may be stuck, clogged.

Okay. Should i loosen both lock nuts and adjust it at thesame time? After adjusting i'll turn on engine and try it right? Thanks, Lachau

 

[Luchojry]

Hello, @LACHAU ! I just did it. It has any effect now. But im afraid to adjust more in right swing because i turn it 1 and 3/4 rev already while left 1 and 1/4. Is it just too much?