kumatsu pc450 LC lever not working

[abedsunna]

hello
i have komatsu 450 suddenly stopped operating all hydrulic movement
lever not working
please help

 

[abedsunna]

450-7

 

[uffex]

Good day
First check your servo pressure assuming there is no history to the fault.
Kind regards
Uffex

 

[Vetech63]

Make sure you don’t have a blown fuse on your lock out system also.

 

[abedsunna]

Good day
First check your servo pressure assuming there is no history to the fault.
Kind regards
Uffex

do you mwan that it might be the pump coupling or shaft?

 

[abedsunna]

Make sure you don’t have a blown fuse on your lock out system also.

all fuses are ok

 

[abedsunna]

it would help if you have the electric workshop manual to trace the lever microswith and the safety solynoied

 

[abedsunna]

thanks for reply dears

 

[abedsunna]

also how to login to service menu

 

[uffex]

do you mwan that it might be the pump coupling or shaft?

Good day
Not sure which model we are talking about dash 3-4-5?
It could ne a failed pump coupling however that is a guess much better work along the system to find the problem.
See attached
Kind regards
Uffex