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starting cub after an engine overhaul lube question

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bigbadger12000
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starting cub after an engine overhaul lube question

Postby bigbadger12000 » Wed Dec 14, 2016 9:09 am

Just finished a complete teardown and overhaul of a 48 cub. Did a resleave/inframe overhaul of a Farmall A about 15 years ago, but it did not have hydraulics and the oil pumping system was not disturbed so I'm unsure of the correct steps. Do I need to bleed the hydraulic system and prime the pump? Do I need to prime the oil system. If so what is a practical way to do so. I was going to crack the hydraulic line at the pump to fill the lines. I did not get the published quantity of hydraulic fluid into the system so I'm guessing the lines are air bound. I did prelube the bearings.

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Slim140
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Re: starting cub after an engine overhaul lube question

Postby Slim140 » Wed Dec 14, 2016 9:12 am

The engine has a hole in the oil filter housing about 3/16" to 1/4" in size, you need to put oil in that hole to prime the oil pump.
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Re: starting cub after an engine overhaul lube question

Postby Bigdog » Wed Dec 14, 2016 9:39 am

On the hydraulics system leave the fill cap off the reservoir and cycle the control lever 10 - 12 cycles after you have the engine running. That should clear the air from the lines.
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Re: starting cub after an engine overhaul lube question

Postby ScottyD'sdad » Wed Dec 14, 2016 2:47 pm

I generally crack the hydraulic line connection at the pump, til it leaks oil, the tighten and start. Then follow BigDog's recommendation, above.
Oil pump, as Chipmaker recommends.
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Re: starting cub after an engine overhaul lube question

Postby Glen » Wed Dec 14, 2016 6:28 pm

Hi,
Here is a page from the Cub owner's manual telling about checking and changing the fluid, and filling the Touch Control system. Paragraph 4 tells how to get the air out of the system. At the end of paragraph 4 it says to fill it the final time with the arms in the rear position.
The fluid level rises as the arms go to the down position.
If you fill it the final time with the arms ahead, it will have too much fluid in it.
If you filled it the last time with the arms ahead, I would take out the filler plug, start the engine, and move the lever and arms to the rear, and let the excess fluid run out.
Nowadays they sell Hy-Tran fluid for it at Case IH dealers. It holds 3 1/2 pints, after a fluid change, that's less than 2 quarts.

Here is a picture of where the hole is that I use for priming the oil pump. Just remove the oil filter top, and oil filter, and it is easy to see, use a light if you need to.
I fill a clean oil can with motor oil, and pump it into the hole, you might need more than one filling of the oil can to fill the passages in the engine.
Watch the oil gauge after starting, it takes 15 - 30 seconds for the gauge to show pressure, it has to fill the oil filter housing before the gauge will show pressure. :)

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bigbadger12000
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Re: starting cub after an engine overhaul lube question

Postby bigbadger12000 » Wed Dec 14, 2016 8:59 pm

Thanks for all of the responses. I found the oil hole inside the oil filter housing and got the oil in using an old style oil can. The picture matched up with what I used. I have a set screw at the top of the housing that I could not get out so glad to see that the hole I used was right. Took a while to fill up the cavity. Been working on getting the timing right and she pops off well. Going to get the cub started in the morning and clean off the driveway as new snow is coming Friday.

I filled the hydraulic unit with the arms back and got just over three pints in. I think with the pipes full I will get the other 1/2 pint in.


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