JD 40 questions

[David K]

My neighbor has a JD model 40. Most of my tractor experience is with Ford and IH..... I'm not very familar with JD's.

The transmission and/or rear end of the JD has water in it and the fluid needs to be changed. Is the transmission, rear end, hydraulics, bull gears, etc. all one section or do they need to be drained individually? Where do you refill (there's a fill cap up by the seat, any others)? How do you check the levels? His I&T manual is not very helpful. He should buy a users manual but probably won't.

Thanks for your help.
Dave

[David K]

Well I jumped the gun a little bit and posted my question before I went and looked.....

The transmission and rear end get filled to the level of the angled plug on the right side of the transmission. Drain plug is under the left floor board. Is this the only drain plug?

The bull gear housings each have drain plugs and the fill/level plugs are right under the bull gear bearing caps. Is this right?

Thanks.

[glenn42h]

David, To answer some of your questions,,, on the transmission you are correct about the drain plug being on the left side below the foot board and YES it is the only one .As for the hydraulic fluid the fill hole is under the seat towards the front, the drain plug for the hydraulics is located to the rear of the tractor just above were the center link attaches for your three point hitch,,and above the drain plug just to the right is the test cock. So when filling the hydraulic fluid reservoir open the test cock pour in the oil at the filler opening until it runs out at oil level cock. Oil capacity of your hydraulics is approximately 4 1/2 U.S. quarts. GLENN

[David K]

OK, thank you. One more question.....Hy-Gard for everything (except the engine).

[glenn42h]

David, I get my hydraulic fluid from my local NAPA store ,,,,
it's Valvoline , and the gear oil is SAE 90 (mineral gear oil) in NAPA brand, your brand will work just fine. I also wanted to mention that your final drives require 3 1/2 pints S.A.E 90
in each drive. The steering housing gets S.A.E. 90 as well ,,,,, fill at top of filler hole until full,any excess oil will run down the vertical sterring shaft and leak out at the bottom.

[David K]

OK, let me re-phrase myself.....
Hy-Gard is JD's universal gearbox/differential/hydraulic/multi-purpose fluid. Same as IH's Hy-Trans. Same as Universal Tractor Fluid.

Does the transmission/differential take Hy-gard or gear oil?

The hydraulic system uses Hy-Gard, right?

The final drives use use gear oil, right?

For the areas that use gear oil....what weight?

Sorry for the confussion, but I don't want to tell the guy the wrong stuff.