Oil & Fuel 4.2 gal vs 2.5 gallons

[heehaw]

i know i read about someone else doing this sometime ago: an never found the answer: so now i have done it an need the answer...the book says the b7510 has 4.2 gallons of hyd fluid with the hst transmission: it has 3 drain plugs, i pulled all three an let them drain for a really really long time an i got 2.5 gallons out..maybe a smidge more...so i "assume" when i get my filter problem straightened out, an put new filters on, i will put in 2.5 gallons of fluid an call it good...
i am "assuming" that you can't really empty the hyd system all at one time with the drain plugs??? does that sound right to anyone??
heehaw

 

[RickB]

Fill it to the level indicated by the proper range of the dipstick or sightglass, whichever it has. Operate the tractor using all its hydraulic functions, then check the oil level again, topping it off as required.

 

[heehaw]

i'm just glad i measured what i took out, or i would have just poured in 4 gal an then checked the level an been in a mess.
heehaw

 

[Kubota 2350]

Where is the other 2 gallons at?
Is that how much the loader holds?
I would try to find out how to get the rest out before mixing my new clean oil with the old.
It doesn't make sense to just change half the oil.

 

[heehaw]

i agree: an since i have to wait till tuesday to get the other filter for the transmission, i am going to ask then about the difference between what it holds an what i have removed.
heehaw

 

[gwdixon]

Does the B7510 have wet brakes? If so, there is a drain plug at the bottom of each brake housing. That fluid gets particularly filthy.

The fluid in the hydraulic cylinders will not be changed unless you lifted them all, drained the fluid, and then let gravity lower the cylinders with an open spool. That will result in air in the system at refill but it is expelled with a couple of cycles. Too late now of course.

 

[heehaw]

as far as i know, it does have wet brakes: i will check on that when i pick up the filters tuesday: i would be leary of starting the tractor an lifting the fel or 3pt: i am leaving it without the 2.5 gallons i have drained, until i get the new filters an ask the dealer about what else i need to do before adding new fluid.
heehaw

 

[gwdixon]

If there are wet brakes there will be two circular cases between the transmission and the rear wheels. Just find the two drain plugs and you are good to go. They are at the lowest point on the transmission. The manual should have mentioned those drain plugs.

The cylinder trick is to be done before draining the fluid. That is why I said "too late now". Maybe next time.

 

[heehaw]

the manual did mention the brake drains: i just didn't recognise what they are: there are 3 drain plugs: i did all of those: got out more than 2.5 gallons of fluid, so i figure theres less than 1.5 gallons still in there...
heehaw

 

[gwdixon]

Sooo....you already drained the brake drums? That would mean one main drain plug and 2 on the drums to make a total of three. That area could easily hold 1.5 gallons if it is not drained.