best way to drain all the hydraulic fluid to reuse the oil? 753 bobcat

[Vintagecarlover]

Hate wasying so much oil but need best plan for draining so i can open contol valve again. 753 bobcat

 

[SSdoxie]

There are 2 hoses at bottom of the reservoir. A large hose for suction line to gear pump and smaller hose is case drain line feed back to reservoir. Follow smaller line to it's first connection and remove it there to reroute to an container.

 

[hosspuller]

Use a shop vacuum on the fill to keep the lines from draining. Clean fittings so you don't suck dirt into system... but you'll do that anyway to keep any dirt out if you were draining the system to reuse oil. Right ?

 

[California]

Recently I drained - slowly - through a re-usable coffee filter I bought for the project. Brass mesh.

Slow but effective. I think this filter mesh is even finer than the tractor's intake 'strainer' which is its only hydraulic filter.

Example:

 

[electrycmonk]

pictures are so subjective and scale is also distracting on a white background (smirks).... would really like to know where you got this basket and whats its actual size is? amazoin? google images only, etal?

 

[California]

Roughly 4.5" wide x 3" tall.
That basket replaces the paper filter in a Mr Coffee coffeemaker. Stock photo:

 

[electrycmonk]

Awesomeness. thanks for the fast update dude! any other sage wisdom from this experiment?

 

[California]

Awesomeness. thanks for the fast update dude! any other sage wisdom from this experiment?

Not really.

An observation - the UTF I replaced in the manual-transmission Yanmar seemed good enough to re-use after a repair (had to take off the right axle housing) so I decanted and filtered it to see if it was contaminated with water or debris. It had been put in fresh in 2013. It looked as good as new so I re-used it, running it a second time through that filter. After five gallons there was nearly no debris in that filter, and maybe a teaspoon of fine particles at the end that I didn't pour out of the (new, clean) drain pan. It seemed good enough to re-use in a manual transmission tractor that I use mostly for its backhoe, not for discing or mowing that would work the transmission harder.

Then last week I got curious whether the fluid in the backhoe that is mounted on that tractor was still good. That fluid has been in since 2007. I got out the pump I use for diesel refueling, and sucked a quart from the bottom of the backhoe's reservoir into a jar. The backhoe hadn't been used for a month so any water would have settled to the bottom by then. Surprisingly, that fluid looked nearly as good as new. No water at all, slight color and a few microscopic particles. I'm trying to decide if it needs to be replaced or if simply replacing the backhoe's hydraulic filter is enough.