Komatsu PC15 hydraulic oil

[Jake83]

Hello all, new member here.
I’m British but now live and work in Thailand. We have 2 machines, a 2016 Volvo 210D and a Jap import 2018 Komatsu PC15.
I recently bought the Komatsu and I noticed a small hydraulic leak. Knowing Komatsu run 46 grade (10w) oil I looked a little more into into it and realised the company I bought it from serviced it prior to sale and changed all the hydraulic fluid using standard 68 grade oil.
Now I don’t know what to do, should I change it for the correct oil which will need a flush or leave it?
Temperature wise here it’s always 30 degrees plus so this factor must be taken into consideration.
Thank you in advance

 

[T whiting]

I wouldn't worry about it unless it's causing operating problems. I also wouldn't bother with a flush if you change it just drop the oil and refill with 46.

 

[Gecko]

There is no problem mixing different grades - eg. if you replaced half the '68 with '32, you'd have a tank full of '46.
That said, as @T whiting says, you never have cold mornings and with the warm climate, '68 may suit better.

 

[Jake83]

Thank you chaps. I had a chat with a Komatsu technician and he said the same. No problem with this oil. I’m relieved as haven’t got the time to be messing about with it.