50 Hour Service Help: Kubota Review  -- Kubota Tractors Discussion Forum and Review 50 Hour Service Help: Kubota Review -- Kubota Tractors Discussion Forum

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 08-09-2004, 19:53 Post: 93076
dmnsmith2



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 50 Hour Service Help

I've been looking for some specific info on this board but haven't found everything I am looking for.

My 50 hour service is coming up and I need some help on my B7800 4WD.

Are there 2 drain plugs for the engine oil?
Is the engine oil filter different size, shape, color, etc than the tranny filters (I don't want to confuse them)?
Are there 4 drain plugs for the tranny fluid (1 for front tranny case and 3 for rear tranny case)?
Are there 2 filters for the tranny?
It seems there is only one place to check the tranny fluid, so why do they discuss front and rear transmission in the manual as if they are 2 different areas?

Also, what price should I expect to pay for the engine oil,engine oil filter, tranny fluid (super udt), and tranny filters?

This is the first tractor I have worked on so I am a newbie to this area. Any precautions or tricks of the trade I need to know while performing these operations? I have a loader and MMM on the tractor. Will these be in the way of this service? Thanks for all input and help. Much appreciated.






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 08-09-2004, 21:09 Post: 93080
beagle

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OK let's take thses one at a time,

Yes, there are two drain plugs for the engine oil. The tractor has a saddle pan, so you need to pull both plugs. Let the oil get a little warm before ytou drain it, not hot.

The engine oil filter will not spin on the hydro or the hydraulic stem, and visa-versa. Have the dealer label the boxes from the part nos. to avoid any confusion.

There are 4 plugs for the trans/hydro fluid. One at the front trans case, one at the mid pto, and two at the rear gear case, ( either side ). The Trans oil filter is slightly smaller than the hydraulic filter, in fact the trans filter will probably be light blue.

Don't forget to clean the transmission strainer. You will need 18mm wrench and a good torque to loosen the stem. Be carefull with the strainer, it is pretty delicate.

Check the trans fluid level often when re-filling. It probably won't take the entire 3.83 quarts to fill it.

My 50 hr kit cost $104, including tax, with Super UDT.

I think I covered everything. Have fun, should take you about 45 minutes.






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 08-09-2004, 21:17 Post: 93082
beagle

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Sorry, the loader can stay on the tractor, although it is easier to get at the oil filter without it. The MMM will be in the way and should be removed.

If you leave the loader on, make sure you completely retract all the cylinders. Put as much fluid back in the tractor as you can. Same thing goes for the 3-point.






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 08-09-2004, 22:30 Post: 93088
mikey1665



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Beagle, What good would it do to retract the cylinders, it takes fluid to move them either way doesn't it? Thanks in advance mikey






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 08-10-2004, 06:43 Post: 93100
domogala



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 50 Hour Service Help

With a hydraulic piston retracted into its cylinder, the physical piston is inside the cylinder, displacing some of the area that would normally be filled by oil.






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 08-10-2004, 07:10 Post: 93102
dmnsmith2



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Thanks for your input and time beagle. That helps me out a lot.

Take care!






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 08-10-2004, 14:39 Post: 93151
bobodude

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 50 Hour Service Help

Retracting the piston does not change the amount of fluid in the cylinder. There is fluid on both sides of the piston. As it extends or retracts, the volume changes on each side but still the total amount remians the same. Go to www.tractorsmart.com ...tech info...Kubota service tips....Front loader troubleshooting. At the bottom of the page it has a animated diagram of how a hydrolic cylinder works. That will clarify my point. Cheers






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 08-10-2004, 15:18 Post: 93154
beagle

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The volume of the fluid in the cylinder is reduced by the volume of the rod that is in the cylinder body. The annimation on the link you suggested expains this. The effective area of a hydraulic cylinder is not the same for push and pull, due to the area of the rod. The area of the rod times it's length is the volume of fluid displaced as the rod enters the cylinder. Hydraulic cylinders, except specialized application cylinders, have higher push capacities than pull due to the rod area.






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 08-10-2004, 15:39 Post: 93156
mikey1665



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Beagle,,,now I understand since the last post. The rad makes the difference and I understand. Thanks a bunch mike






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 08-10-2004, 15:59 Post: 93158
beagle

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That's why it is also best to store any hydraulic cylinders in the retracted position to keep the rods out of the environment and in the oil bath.

Glad I could help. Good luck






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Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

Thread 93076 Filter by Poster:
AnnBrush 1 | Art White 1 | beagle 5 | bobodude 1 | dmnsmith2 3 | domogala 1 | kwschumm 1 | mikey1665 2 |




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