Hey guys, I have a 2002 bobcat 773 turbo and I'd like to change out the hydraulic fluid back to OEM fluid. What's the best way to drain it getting as much of the old stuff out? I have a leak I can't find thinking maybe the cheaper fluid I'm using might be the cause. Only leaks when it's super cold and on initial startup.
It's controversial but you can get a lot more of the fluid out by blowing it out of the auxiliary. You just have to take it easy and stop as soon as it starts to sputter.
The only way to get the fluid out of the cylinders is to detach the hoses and cycle them.
Alternatively, you can pump out however much oil you can, add new, cycle everything several times and then repeat the whole process. This is a huge waste of oil though.
Your leak in the cold is probably just because the oil is too heavy until it warms up. You may just want to go to a thinner oil in the winter.